3,531 Junior Developer jobs in the United Kingdom

Why work for us?
A career at Janus Henderson is more than a job, it's about investing in a brighter future together.
Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.
Our Values are key to driving our success, and are at the heart of everything we do:
Clients Come First - Always | Execution Supersedes Intention | Together We Win | Diversity Improves Results | Truth Builds Trust
If our mission, values, and purpose align with your own, we would love to hear from you!
Your opportunity
+ As a Developer within the Operations and Regulatory Technology team you be responsible for designing, developing and maintaining software used to support Janus Henderson's Regulatory obligations.
+ To support the development of these applications you will be required to understand building of new cloud-based applications (Azure, Microsoft Stack, Angular), databases (Azure SQL Server, Snowflake), and supporting functionality to meet business stakeholder and regulatory requirements.
+ Using Agile project methodologies, you will work as part of a team to deliver change covering the full project Lifecyle from project initiation through to test execution and Go Live, adhering to product release delivery schedules working as a collaborative team member in an agile development environment.
+ This is a hands-on technical role where you will be required to research, design, develop, test, debug, document and support custom Regulatory applications in support of business needs.
+ Partnering with the Regulatory Reporting team as well as other impacted stakeholders, you will be instrumental in agreeing and implementing changes to our operating model to ensure we continue to meet our regulatory requirements. You will also be required to produce technical specifications and release notes for required features and architectural/framework improvements so excellent communication skills is a must.
+ You will actively participate in code design and code reviews with appropriate team members as well as requirements and design meetings.
+ You will need to ensure that all code adheres to vendor best practice and strict standards for accessibility, security, object-oriented practices and performance.
+ Carry out additional duties as assigned.
What to expect when you join our firm
+ Hybrid working and reasonable accommodations.
+ Generous Holiday policies.
+ Excellent Health and Wellbeing benefits including corporate membership to ClassPass.
+ Paid volunteer time to step away from your desk and into the community.
+ Support to grow through professional development courses, tuition/qualification reimbursement and more.
+ Maternal/paternal leave benefits and family services
+ Complimentary subscription to Headspace - the mindfulness app
+ All employee events including networking opportunities and social activities.
+ Lunch allowance for use within our subsidized onsite canteen
Must have skills
+ Experience in C# and Angular, solid understanding of OOP, and full-stack development including Azure DevOps
+ Experience in Azure including Functions, Resource Groups, Service Bus, Storage, and additional resource types
+ Proficiency in SQL across SQL Server and/or Snowflake to analyse, investigate, optimize data retrieval, and build out requirements as needed.
+ Understanding of data, specifically related to asset management regulatory and investment areas
+ Understanding of Agile delivery methodologies
+ Ability to design and deliver complex systems at scale
+ Excellent communication, presentation, influencing, and reasoning skills, demonstrating the ability to communicate information technology concepts to non-technology personnel
+ Problem solving / analysis - ability to understand complex issues and to then identify and effectively communicate solutions, taking ownership of the problem through to successful resolution
+ Experience of working in a global environment managing stakeholders across the globe
Nice to have skills
+ Databricks and Python development experience beneficial
+ Experience of micro-service development and API development
+ Craftsman-like approach to building software; takes pride in engineering excellence and instils these values in others
+ Demonstrable passion for technology e.g. personal projects, open-source involvement
+ Intellectually robust with a keenly analytic approach to problem solving
+ Self-organized with the ability to effectively manage time across multiple projects and with competing business demands and priorities
+ Focused on delivering value to the business with relentless efforts to improve process
+ Strong interpersonal skills; able to establish and maintain a close working relationship with team members and senior business stakeholders alike
+ Confident communicator: able to argue a point concisely and deal positively with conflicting views.
+ Ability to communicate information technology concepts to non-technology personnel
+ Problem ownership - takes responsibility for identified issues and works to resolve in a pragmatic manner
+ Client focused, committed to excellence, strong attention to detail and a team player
Supervisory responsibilities
+ No
Potential for growth
+ Mentoring
+ Leadership development programs
+ Regular training
+ Career development services
+ Continuing education courses
You will be expected to understand the regulatory obligations of the firm, and abide by the regulated entity requirements and JHI policies applicable for your role.
At Janus Henderson Investors we're committed to an inclusive and supportive environment. We believe diversity improves results and we welcome applications from candidates from all backgrounds. Don't worry if you don't think you tick every box, we still want to hear from you! We understand everyone has different commitments and while we can't accommodate every flexible working request we're happy to be asked about work flexibility and our hybrid working environment. If you need any reasonable accommodations during our recruitment process, please get in touch and let us know at
#LI-CH2 #LI-HYBRID
Janus Henderson (including its subsidiaries) will not maintain existing or sponsor new industry registrations or licenses where not supported by an employee's job functions (as determined by Janus Henderson at its sole discretion).
All applicants must be willing to comply with the provisions of Janus Henderson Investment Advisory Code of Ethics related to personal securities activities and other disclosure and certification requirements, including past political contributions and political activities. Applicants' past political contributions or activity may impact applicants' eligibility for this position. Janus Henderson is an equal opportunity /Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. All applications are subject to background checks.

Are you passionate about buildinginteractive maps ,data-rich dashboards , andintuitive user experiences ? We're looking for a skilledFull-Stack Developer who thrives at the intersection of geospatial data, modern web technologies, and backend API development.

? Tech Stack You'll Work With:

Database: PostgreSQL + PostGIS
Backend: Node.js, Python, .NET (or equivalent) API development
Frontend: JavaScript, Ma.

WHJS1_UKTJ

Developer, Nottingham Office

• Permanent, Full-time, Hybrid

About LEAP
LEAP is the leading provider of Legal Practice Productivity Solutions in the world and is part of ATI – one of the largest international LegalTech companies. For more than 30 years, our curiosity and commitment to continual improvement have kept us reimagining productivity tools for lawyers and their staff to support our guiding purpose, to ‘Help lawyers who help people’. The market-leading software we develop and support is used by more than 100,000 lawyers and their staff in small and medium-sized law firms.

LEAP Estates is the Private Client specialist division of LEAP.  We operate as our own independent business unit, as well as providing support to the wider LEAP business.  Focusing on this area of law only has enabled us to deliver innovative solutions and award-winning software to our growing user base.

Meet the Innovations Team
At the core of LEAP’s success is our market leading software, and our Innovations Team are the architects, coders, and creators keeping our legal software at the cutting edge of what’s possible.

Working alongside a dynamic and passionate team of law and technology experts alike, you’ll harness your technical aptitude and curiosity to understand our client's needs and translate them into innovative software solutions.

This is an exciting opportunity to work at the frontier of the technology space and make a powerful impact by streamlining our customer's ways of working and giving them space to do more for their clients. A place where your unique perspective and a little human touch will do wonders, not just for lawyers who help people, but in shaping the future of legal technology.

Requirements

Our Stack:

• Backend - PHP (Laravel)
• Frontend - Javascript (Vue.js, React.js)
• Design - Bootstrap & TailwindCSS
• Devops – AWS, Digital Ocean, Forge

What you'll do

• Write testable, optimal and clean code.
• Preform code reviews for peers.
• Planning and designing of software solutions.
• Prioritising own workload, allowing for urgent support requests.
• Undertaking in daily Huddles and weekly sprint planning and review meetings.
• Communicating any blockers efficiently and timely.

What you'll bring

• Over 3 years of experience in server management and web development.
• Experienced in leading and mentoring developers across varying skill levels.
• Skilled in writing comprehensive tests to maintain product reliability and security.
• Proven ability to work autonomously and make confident decisions during development.
• Experience working with and managing developers of various skill levels, including mentorship.
• Expertise with Cloud Infrastructure (DigitalOcean / AWS).
• Strong knowledge of MySQL and database design.
• Experienced with Git for version control.
• Familiarity with continuous integration implementation.
• Knowledge of C# is a plus, but not mandatory.

LEAP is an inclusive, people-first company committed to breaking down institutional barriers that keep people from reaching their potential. If you meet some, but not all of the requirements above, we encourage you to still submit your application.

Benefits

What you'll get

On top of a competitive salary and commission structure, we also offer an excellent benefits package:

• Friendly, supportive and driven culture
• LEAP pays 8% of your salary into your pension
• Private Health Insurance, including optical and dental
• £80 a month gym contribution
• Life Insurance cover
• Employee Assistance Program
• Generous Professional Development Fund
• Enhanced Parental Leave
• PerkBox membership
• Cycle to work scheme
• 25 days holiday (plus 8 bank holidays)
• Work anniversary rewards
• Paid time off to give blood
• Volunteer day – We offer 1 day per year for a charity of your choice
• Free healthy breakfast, light lunch, snacks

Life at LEAP
LEAP is all about impact, growth, and ownership. We’re united by a genuine passion for what we do, enriched by the care we show to our customers and each other, and driven by the difference we can make together.

LEAPster culture is about prioritising and celebrating the incredible humans behind our market-leading technology. Think performance-driven remuneration incentives, flexible hybrid work, a enhanced parenting policy, regular social events, free gym membership and so much more.

We strongly believe that personal development and career progression are at the heart of a healthy, high-performing culture and we’re committed to empowering LEAPsters with resources and ongoing support. With us, your career will grow as you do, with opportunities to step into new roles, explore new departments, and even work abroad.

More you should know
Discover the human side of cutting-edge LegalTech.

Life at LEAP

Discover more LEAP opportunities

Closing Date: Monday, 1st September, 2025

We reserve the right to close this vacancy early if we receive a high volume of suitable applications. We encourage interested candidates to apply as soon as possible.

It’s fine to use AI to help with your application, just keep it genuine and make sure it reflects you.

A real person will read your CV and chat with you if you’re invited to interview. We want to get to know the real you, not just ChatGPT!

Job Description

Software Developer

Bristol

SNBG 7 -10

An excellent opportunity has arisen for a Software Developer to join our team in Bristol.

At Rolls-Royce we are pioneers of power. When we talk about innovation within this business, it's essential we demonstrate how we do this. We don't just imagine great possibilities - we push boundaries at every stage and bring our innovative ideas to life through impressive engineering. This is how we create brilliance, which we should sell by letting the facts speak for themselves.

We're the second largest global provider of defence aero-engine products and services globally with 16,000 military engines. Rolls-Royce has customers in more than 150 countries, comprising more than 400 airlines and leasing customers, 160 armed forces and more than 5,000 power and nuclear customers. From combat to transport, from trainers to helicopters, our engines and pioneering service solutions ensure that our Defence customers have world-leading engine technology available, whatever the mission demands.

As an integral partner in the Tempest programme, the programme to develop the next generation of combat aircraft, we're developing innovative capabilities and technologies to revolutionise air power.

A fantastic opportunity has arisen in our Test Facility Design team to join this exciting world class team in preparation for our future programmes including Tempest which will provide successful applicants with opportunities to expand their knowledge across all areas of gas turbine operation and development testing.

Key Accountabilities
Develop software for measurement systems from a user requirement to maturity.Investigate and troubleshoot existing systems.Introduce appropriate technology and latest standards into existing designs with a view to improving efficiency and effectiveness.Maintain and develop our Active Directory Network in use on the test site.Participate fully in multi-function design reviews to ensure alignment of customer requirements and proposed design.Able to work under pressure, working to tight short-term deadlines and self-motivated with a positive attitude to work.
Qualifications

Essential:
Competent with C++ and CKnowledge of Revision Control Systems for control of software release (e.g. SVN or GIT).Good working knowledge of Windows operating systems (Clients and servers, installation & configuration) including Active Directory and DNS.Working knowledge of Linux Operating Systems (Installation & configuration).
Desirable:
Network Communication methods, familiarity with UDP and TCP/IP and other network protocols.Familiarity of Microsoft Visual Studio.Understanding of Data Acquisition Systems.
Please be aware that the priority will be given to employees identified as being at high risk.

The professional level and salary of the position will be dependent on the skills and experience of the successful candidate but is anticipated to be Staff Grade 7-10

This job is advertised at the grades shown, and this is the desired operating level for this role. We encourage applications from candidates with relevant experience from any grade

If you're a member of the Rolls-Royce UK Pension Fund (Defined Benefit/Final Salary Scheme), then changing jobs could affect your future pension benefits. To find out more, please click: Further detail on the Standard All-Inclusive Rate (AIR) Pensions splits can be found in Appendix 1: The Pension Protection Arrangements Memorandum of Understanding (MOU) - the MOU explains the arrangements when employees transfer to a different pay structure or to a new job in the same structure when the individual has a different AIR split to the standard for that area.

It is advised that you inform your current manager of your application for this role.

Our People are our Power

We promote and support flexible working arrangements wherever possible - so you can always be at your best. If our proposed working pattern doesn't meet your needs, discover more about how we can support you.

We are an equal opportunities employer. We're committed to developing a diverse workforce and an inclusive working environment. We believe that people from different backgrounds and cultures give us different perspectives. And the more perspectives we have, the more successful we'll be. By building a culture of respect and appreciation, we give everyone who works here the opportunity to realise their full potential.

You can learn more about our global Inclusion strategy here

Job Category

Validation and Verification

Posting Date

22 Aug 2025; 00:08

Posting End Date

04 Sept 2025PandoLogic. Keywords: Programmer, Location: Bristol, ENG - BS2 9NX

Successful candidates will have a unique experience working on or supporting the latest ground-breaking cyber security and networking technologies on a national and international scale. This opportunity will allow those involved to have first-hand exposure to the latest technologies via the research and development that we are undertaking to secure our telecommunications networks, in order to keep the UK the safest place to live and do business online. It also gives exposure to senior government department officials, communications industry leaders and academic professionals, all key stakeholders as you help leaders to coordinate meetings and briefings.
As a trusted and independent national capability, the UKTL will interact at the intersection of standards bodies, such as 3GPP, the National Cyber Security Centre and the wider UK intelligence community, academia, Ofcom, as well as Communications Service Providers and telecommunication equipment vendors.
What you could be doing for us:

• Responsible for the software development lifecycle of bespoke tooling.
• Leverage your experience and skills to assist teams in establishing the best architecture for products and services.
• Provide technical expertise on software development across teams in the .
• Developing CLI and web applications using modern interpreted and compiled programming languages, debugging & troubleshooting, IDE & OS Basics, test driven development, clean code & refactoring, version control, CI / CD, alerting & monitoring, Functional & Non-Functional Testing.
• High performance application design and development in C++, Python and related languages.
• Conduct security research and develop solutions for 5G networks, including creating and testing prototypes in both fronthaul and backhaul environments.
• Work with the latest high-end telecommunications hardware and performance machines.
• Contribute to advancing security in cutting-edge telecommunications technologies and developing robust solutions for high-performance systems.
• Working with latest and high-performance technologies.

Successful Applicants must be able to commute to the offices in Birmingham at least twice a week



About the Candidate:
Essential skills

• Engagement with open-source communities and processes.
• Solid scripting ability e.g. with Python.
• Basic Linux / Unix environment experience.
• Broad understanding of 5g wireless networks.
• Experience using e.g. C/C++ for software development.
• Experience with Git or other version control.
• Basic understanding of and competence in using virtualized environments.
• Understanding of containerisation & networking basics willingness to learn more if needed.
• Ability and enthusiasm to learn new programming languages as needed, with a strong interest in continuous development.

MUST BE ELIGIBLE FOR SECURITY CLEARANCE!

Your new company

You will be joining a fantastic Public Sector organisation who are utilising Power Platform and PowerAutomate to automate within the organisation to make improvements, enabling time and funds to be saved and utilised in other areas.

Purpose of your role
As an Application Developer, you will be responsible for

• Developing interfaces to existing systems that enhance the end user's experience
• Build new applications that deliver efficiency and modernisation to the organisation.
• You will need to interpret systems already in use within the organisation to gather an understanding of their functionality.

Day-to-day typical duties

• Using Microsoft Power Platform and PowerAutomate, building Canvas and Model driven Apps to design and develop applications that deliver modernisation and efficiency to the organisation
• To be forward-thinking and proactive in suggesting future enhancements that could benefit the organisation

What you'll need to succeed

• Minimum of two years' hands-on experience with Power Platform development - including PowerAutomate, and building Canvas Apps and Model Driven Apps
• Living within commuting distance of Hampshire
• Advantageous to have experience with Portal and Power Pages, but not essential

What you'll get in return

• Hybrid working - one day together in the office once a fortnight
• Great pension and benefits package including Local Government Pension, 29 days annual leave, plus bank holidays
• Support in gaining certifications/ qualifications in Power Platform
• Free onsite parking

What you need to do now

If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.

If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at (url removed)

Flutter Developer
Marlow/High Wycombe, UK (hybrid) | Full-Time | Permanent | Up to 60,000

I am currently recruiting for a global leader in designing and manufacturing of audio and content creation tools, from microphones to audio interfaces, using AI technologies to enhance the future of audio and video processing.

We are looking for a Flutter Developer to join the Research and Development team. You will be responsible for building high-performance, visually engaging, and user-friendly cross-platform mobile and desktop applications using Flutter. Your work will focus on the front end of innovative AI-powered tools for audio and video post-processing. You'll work closely with AI engineers, product managers, and UX/UI designers to bring our next generation of creator tools to life.

What We're Looking For:

• Proven experience in Flutter development with a portfolio of shipped applications.
• Proficiency in Flutter and Dart.
• Familiarity with RESTful APIs and third-party integrations.
• Experience with syncing application state with backend servers using an offline-first methodology, ensuring robustness in connectivity-challenged environments.
• Strong understanding of state management (e.g., Provider, Riverpod, Bloc).
• Experience with version control systems (Git, GitHub).
• Understanding of responsive design and cross-platform development.

Preferred

• Experience integrating applications with cloud services (AWS, GCP, Azure).
• Familiarity with AI/ML concepts and how they form the core of application functionality and user interaction.
• Background in audio or video processing applications.
• Experience with CI/CD tools and mobile deployment workflows.

If this role is of interest and you would like to learn more, please get in touch. You can reach me via:

• Email: (url removed)
• LinkedIn: Sabrina Velosa | LinkedIn

Please reach out with your most recent CV if you have this on hand.

Are you ready to take your career to the next level in a dynamic and innovative environment? This is your chance to join a forward-thinking company at the cutting edge of sensor technology. The company is looking for a talented Firmware Developer to become an integral part of their R&D team. With a focus on creativity, collaboration, and career growth, this role offers the perfect platform for you to showcase your skills and make a real impact.

What You Will Do:

- Develop, enhance, and maintain firmware for embedded systems, focusing on sensor control, data acquisition, and communication protocols.

- Collaborate closely with hardware engineers to integrate firmware seamlessly with PCB designs.

- Implement and optimise drivers, communication protocols (such as UART, I2C, SPI), and low-level system functions.

- Debug, test, and validate firmware on target hardware to ensure top-notch performance and reliability.

- Work with the software team to ensure smooth communication between firmware and applications.

- Write clean, maintainable, and well-documented code that aligns with industry best practices.

What You Will Bring:

- Proficiency in C programming for embedded systems, with proven experience in real-world applications.

- Familiarity with microcontrollers such as STM32 or ESP32, along with their development environments.

- Hands-on experience with communication protocols like USB, UART, I2C, and SPI.

- Strong problem-solving skills and the ability to work independently while collaborating effectively within a team.

- Knowledge of hardware debugging tools such as oscilloscopes and logic analysers.

This role is pivotal to the company's mission to revolutionise sensor technology. By contributing to the development of cutting-edge firmware, you'll play a key role in ensuring their products deliver reliable and efficient performance in real-world applications. This company values innovation, adaptability, and the pursuit of excellence, making it the ideal environment for a Firmware Developer looking to grow their career.

Location:

The role is based in Bromsgrove area, initially you will be working in the office 3 days a week. This will transition to a couple a times a month once autonomous in the role.

Interested?:

Don't miss this chance to be part of a pioneering team driving innovation in sensor technology. Apply now to start your journey as a Firmware Developer and unlock your potential!

Your CV will be forwarded to Jonathan Lee Recruitment, a leading engineering and manufacturing recruitment consultancy established in 1978. The services advertised by Jonathan Lee Recruitment are those of an Employment Agency.
In order for your CV to be processed effectively, please ensure your name, email address, phone number and location (post code OR town OR county, as a minimum) are included.

Frontend Developer

6 Month contract
40 hours per week
Inside IR35
Hybrid 1 office day

London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB

We are seeking a talented and motivated Frontend Developer with strong expertise in TypeScript to join our growing development team. In this role, you will work on building high-quality, scalable, and responsive web applications using React and TypeScript. You will collaborate closely with cross-functional teams to deliver exceptional user experiences, optimize performance, and contribute to the overall architecture of our platform.

Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London office. It is a full-time role, 40 hours per week.

Accountabilities:

• Develop and maintain scalable and responsive web applications using React.js and TypeScript.
• Collaborate with UX/UI designers to implement modern, intuitive, and visually appealing user interfaces.
• Write clean, maintainable, and efficient code while adhering to best practices.
• Optimize applications for maximum performance across a wide range of devices and browsers.
• Participate in code reviews and maintain a high level of code quality.
• Troubleshoot and debug issues in both development and production environments.
• Contribute to architectural decisions and collaborate with other engineers on overall application design.
• Ensure the scalability and security of applications by following best development practices.
• Stay up-to-date with emerging technologies and industry trends, integrating new tools and libraries into the project as appropriate.
• Work with version control systems like Git and ensure continuous integration and deployment processes are followed.
• Collaborate with back-end developers to integrate RESTful APIs and handle data flow effectively.

Knowledge and Skills:

• Proven experience in React.js and TypeScript development.
• Strong understanding of JavaScript and modern front-end technologies.
• Experience with state management libraries like Redux, Recoil, or similar.
• Familiarity with RESTful APIs
• Experience with version control systems, such as Git.
• Solid understanding of web development fundamentals: HTML, CSS, and responsive design.
• Strong debugging skills and the ability to troubleshoot performance issues.
• Ability to write clean, modular, and well-documented code.
• Strong communication skills and the ability to collaborate effectively in a team-oriented environment.

Please note:

Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service.

This vacancy is being advertised by Rullion Ltd acting as an employment business.

Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates.

We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants.

Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.