Explore C developer opportunities, a field experiencing consistent demand. These roles involve crafting software solutions using the C programming language, often working on system-level programming, embedded systems, and performance-critical applications. C developers are sought after across various sectors, from technology firms to engineering companies, requiring a strong grasp of algorithms, data structures, and software development principles. 7,425 C Developer jobs in the United Kingdom
C# Market Data Developer
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Job Description
Overview
Company | Global Investment Firm
Position | Senior C# Developer
Impact | Market Data Ingestion, Analytics, and Distribution
Size | Elite trading and tech teams across global markets
Skills | C#, Market Data, High-Performance Systems, Real-Time Infrastructure
Location | London (On-site)
Hybrid | On-site working (City-based HQ)
Offer | Highly competitive base + Bonus (Annual Review)
Benefits | 25 Days Holiday, Private Medical, Free Meals, Extensive Learning & Development
The Role
A global investment firm is seeking aSenior C# Developer to join theirMarket Data Technology function—an elite team responsible for building and maintaining the infrastructure that powers their globalfixed income, FX, equity, and derivatives trading platforms.
You’ll work acrossreal-time and historical data systems , with an emphasis onperformance, resilience, and low-latency architecture . The role offers direct exposure to trading desks and quantitative teams, with the opportunity to shape the future of their market data stack.
What You’ll Be Working On
- Building and optimisingreal-time and historical data pipelines across cloud and on-prem environments
- Engineering data ingestion, validation, storage, and distribution platforms
- Partnering with traders, risk, and quant teams to deliver performance-critical solutions
- Leading architecture and contributing to system scalability under peak load conditions
- Mentoring junior engineers and supporting broader technology roadmaps
What Makes You a Great Fit
- 5+ years of experience inC# or Java , ideally within high-performance environments
- Deep understanding ofmarket data infrastructure (feeds, storage, transformation, analytics)
- Strong knowledge ofSQL Server and other database technologies (e.g. Redis)
- Familiarity withDevOps/Cloud tooling – Git, Docker, Kubernetes, CI/CD, AWS
- Excellent communication and collaboration skills across technical and trading teams
Bonus Points For
- Experience withrates, FX, bonds, equities, or derivatives
- Messaging systems such asRabbitMQ or similar
- Exposure totime-series models, quant libraries, or risk analytics
Why This Firm?
Global investment firm withdeep tech investment and small, high-impact teams
Direct access to front-office stakeholders—real feedback, fast decisions
Modern, performance-led tech environment solving hard data challenges
Free onsite meals (breakfast, lunch, and dinner) and a host of benefits
Excellent training and exposure not typically offered in larger corporates
Interview Process |
Initial Screening → Technical Interview → Team Round → Final Interview with Leadership
Interested?
We’re happy to share more detail about the environment, team structure, and growth path.
Referrals are welcome, and all conversations are handled in strict confidence.
#J-18808-LjbffrJob No Longer Available
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Software Development Engineer (L5),RBKS Developer Experience
Posted 4 days ago
Job Viewed
Job Description
Do you want to build tools and services that fundamentally improve the development experience for your fellow software developers? The RBKS Developer Experience (DevX) team is looking for passionate software developers to transform the way our customers improve, write and execute test automation software. We develop frameworks and services that enable teams to improve the quality of their products through testing and feedback at every stage of the software lifecycle. We make best practices the path of least resistance. Our tools are automated, intelligent, ubiquitous and wherever possible we automatically perform actions on behalf of our customers/software engineers.
Key job responsibilities
In this role, you will:
- Write clean, maintainable code and perform peer code-reviews;
- Work with DevX and internal teams to prioritise, design and build new solutions for our customers;
- Work with other team members to investigate design approaches, prototype new technology and evaluate technical feasibility.
You will be successful in this role if you:
- Enjoy collaborating with partners, colleagues and teams across the world;
- Have previous expertise working with firmware and distributed systems;
- Can drive tasks to completion and take full ownership of projects;
- Are comfortable with proactive outward communication and technical leadership;
- Can deal well with ambiguous/undefined problems.
About the team
Our mission is to enhance the developer experience at RBKS, enabling engineers to create loveable products and features for our customers. We provide tools, data, and infrastructure that will reduce the time to get code from developers to customer devices whilst ensuring operational excellence, by reducing friction during coding and providing greater device health visibility. Our vision is to develop a suite of tools that seamlessly integrate across the entire development lifecycle, from desktop to production. These tools will enable pre-hardware development and a smooth transition to on-device testing.
Basic Qualifications
- Experience programming with at least one modern language such as Java, C++, or C# including object-oriented design
- Experience in penetration testing and exploitability-focused vulnerability assessment
- Experience in platform-level security mitigations and hardening for Linux and Windows
- Experience in professional, non-internship software development
- Experience building test automation frameworks and tools
Preferred Qualifications
- Knowledge of overall system architecture, scalability, reliability, and performance in a database environment
- Experience with security in service-oriented architectures and web services
Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice ( ) to know more about how we collect, use and
Software Development Engineer (L5),RBKS Developer Experience
Posted 4 days ago
Job Viewed
Job Description
Do you want to build tools and services that fundamentally improve the development experience for your fellow software developers? The RBKS Developer Experience (DevX) team is looking for passionate software developers to transform the way our customers improve, write and execute test automation software. We develop frameworks and services that enable teams to improve the quality of their products through testing and feedback at every stage of the software lifecycle. We make best practices the path of least resistance. Our tools are automated, intelligent, ubiquitous and wherever possible we automatically perform actions on behalf of our customers/software engineers.
Key job responsibilities
In this role, you will:
- Write clean, maintainable code and perform peer code-reviews;
- Work with DevX and internal teams to prioritise, design and build new solutions for our customers;
- Work with other team members to investigate design approaches, prototype new technology and evaluate technical feasibility.
You will be successful in this role if you:
- Enjoy collaborating with partners, colleagues and teams across the world;
- Have previous expertise working with firmware and distributed systems;
- Can drive tasks to completion and take full ownership of projects;
- Are comfortable with proactive outward communication and technical leadership;
- Can deal well with ambiguous/undefined problems.
About the team
Our mission is to enhance the developer experience at RBKS, enabling engineers to create loveable products and features for our customers. We provide tools, data, and infrastructure that will reduce the time to get code from developers to customer devices whilst ensuring operational excellence, by reducing friction during coding and providing greater device health visibility. Our vision is to develop a suite of tools that seamlessly integrate across the entire development lifecycle, from desktop to production. These tools will enable pre-hardware development and a smooth transition to on-device testing.
Basic Qualifications
- Experience programming with at least one modern language such as Java, C++, or C# including object-oriented design
- Experience in penetration testing and exploitability-focused vulnerability assessment
- Experience in platform-level security mitigations and hardening for Linux and Windows
- Experience in professional, non-internship software development
- Experience building test automation frameworks and tools
Preferred Qualifications
- Knowledge of overall system architecture, scalability, reliability, and performance in a database environment
- Experience with security in service-oriented architectures and web services
Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice ( ) to know more about how we collect, use and
Developer
Posted 1 day ago
Job Viewed
Job Description
Contract Opportunity – WebMethods Developer / Administrator
Location: Remote (UK-based only)
Duration: 6 months (possible extension)
IR35: Inside IR35
Security Clearance: Sole UK nationals only – must have lived in the UK for the last 5 years. SC clearance or willingness to obtain.
Are you a WebMethods expert who thrives on solving integration challenges? This is your chance to join a high-performing team, work on exciting projects, and make a real impact — all while working remotely from anywhere in the UK.
What You’ll Be Doing
- Designing, developing, and deploying cutting-edge integrations using WebMethods 10.
- Driving automation with DevOps toolsets for testing and deployment.
- Troubleshooting and resolving complex integration issues.
- Administering WebMethods environments using Command Central for patching, monitoring, and optimisation.
- Collaborating closely with stakeholders to capture requirements and design solutions that deliver real value.
Must Have skills
- Hands-on experience with WebMethods 9 and 10 integration delivery.
- Strong knowledge of JMS Queues, SAP Adaptors, SFTP, HTTPS, JSON, XML, and SOAP.
- Experience in WebMethods administration, including patch management and capacity monitoring.
- Understanding of automated testing and CI/CD pipelines.
- Excellent communication skills and the ability to work with both technical and non-technical teams.
Why You’ll Love This Role
- 100% remote working – no commute, no office politics.
- Work on diverse, challenging projects where your skills make an immediate difference.
- Join a collaborative, supportive team that values innovation.
- Competitive daily rate inside IR35, via an FCSA-accredited umbrella.
Start Date: 1st September 2025
If you’re ready to take on a new challenge and put your WebMethods expertise to work, apply today and be part of something impactful.
Developer
Posted 5 days ago
Job Viewed
Job Description
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-LN2 #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.
Developer
Posted today
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Job Description
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
Posted 8 days ago
Job Viewed
Job Description
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
Frontend Developer
Posted today
Job Viewed
Job Description
Join the Digital Revolution as a Frontend Developer!
Are you a talented Front-End Developer ready to shape the future of digital experiences? Our innovative tech client is seeking individuals like you to contribute to their cutting-edge digital platform.
Why this Opportunity?
- Digital-First Approach: Be part of a company committed to digital innovation. li>Exceptional Team Culture: Collaborate with a talented, supportive team.
- Cutting-Edge Technology: Contribute to a React Native app for Android and iOS, hosted on AWS.
- Career Growth: Enjoy ample opportunities to progress.
About the Company:
Our client focuses on providing access, equality, and inclusion to digital products and experiences.
Your Responsibilities:
- Join a Growing Team: Contribute to a growing product engineering team.
- Toolkit and Support: Use the provided tools to create user-friendly interfaces.
- Continuous Learning: Embrace a culture of continuous learning and innovation.
Your Profile:
- Technical Skills: Experience in React Native, Typescript, Jest & Detox, and Node.js.
- Communication Skills: Convey complex problems to team members.
- Agile and Lean Principles: Experience with agile and lean ways of working.
- If you're ready to shape digital experiences, collaborate with an amazing team, and grow your career, we'd love to hear from you!
What's on Offer:
- Exciting Industry: Join a dynamic company at the forefront of tech.
- Collaborative Environment: Shape your career in a supportive culture.
- Hybrid Working Model: Balance remote work and on-site presence.
Interested? Apply Now! Frontend Developer
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CRM Developer
Posted today
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Job Description
CRM Developer
Southampton / Hybrid (3 days in office per week)
Permanent
Deerfoot Recruitment is assisting a leading organisation in its search for a talented CRM Developer to join its growing IT team in Southampton. This role offers the chance to shape and deliver innovative solutions within Microsoft Dynamics 365 CRM , supporting business transformation across multiple functions.
The role
As a CRM Developer, you will design, develop, and implement custom solutions within Dynamics 365 CRM. You will work closely with stakeholders to translate business needs into scalable technical solutions, while also supporting integration, data migration, testing, and ongoing system enhancements.
Key Responsibilities:
- Work with the business to define requirements and features, ensuring that robust, scalable, and secure CRM features are developed using Microsoft Dynamics 365.
- Customise Dynamics 365 CRM entities, forms, views, and so on.
- Design and implement seamless integrations between Dynamics 365 CRM and other enterprise systems, including ERP, third-party applications, and cloud services.
- Plan and execute data migration strategies from legacy systems to Dynamics 365 CRM.
- Provide ongoing support, troubleshooting, and maintenance for the Dynamics 365 CRM.
- Assist in developing training materials and provide technical support to end users, ensuring smooth adoption of new features and enhancements.
Key skills & experience:
- Strong hands-on experience with Microsoft Dynamics 365 CRM (Sales, Customer Service, Marketing, Field Service)
- Proficiency with the Power Platform (Power Apps, Power Automate, Power BI)
- Experience in custom workflows, plugins, and integrations
- Knowledge of C#, .NET, JavaScript, TypeScript, SQL Server
- Familiarity with Azure services, REST APIs, and data migration tools desirable
Keywords & Beneficial Experience:
Microsoft Dynamics 365, CRM Developer, Dynamics 365 Developer, CRM Technical Consultant, Power Platform, Microsoft Dataverse, C#, .NET, JavaScript, TypeScript, Web Technologies, Software Developer, Integration Developer, Application Developer.
Deerfoot Recruitment Solutions Ltd is a leading independent tech recruitment consultancy in the UK. For every CV sent to clients, we donate 1 to The Born Free Foundation. We are a Climate Action Workforce in partnership with Ecologi. If this role isn't right for you, explore our referral reward program with payouts at interview and placement milestones. Visit our website for details. Deerfoot Recruitment Solutions Ltd is acting as an Employment Agency in relation to this vacancy.
Microsoft Developer
Posted today
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Job Description
Microsoft Developer
6-month contract - outside IR35
650.00 per day
Location: Predominantly remote with access to London once per week/fortnight
Job Specification
Microsoft Fabric Developer
Reviewing business use cases to identify the underlying problem and therefore solution required
Develop excel input templates with validations
Building and maintaining data pipelines (utilising data pipelines or dataflow Gen 2) from the Fabric Lakehouse files into the PowerBI semantic model. i.e.
support the Extract, Transform, Load data side.
Create Power BI reports in a timely manner for stakeholders
Clearly document process' and procedures utilised
The candidate ideally must have:
Experience in the full data lifecycle, including ingesting and cleansing raw data, building robust data models, and delivering actionable insights through Power BI
A Microsoft certification relevant to the role is highly desirable. This could include: DP-600: Implementing Analytics Solutions Using Microsoft Fabric or PL300: Microsoft Power BI Data Analyst. Or a comparable certification in data engineering, data warehousing, or business intelligence.
Provide examples of your work, such as a link to a GitHub repository with documented code, a personal website with project summaries and architecture diagrams, or a published Power BI report that demonstrates your skills.
Contact Dav @ Bristol office
--- Fusion People are committed to promoting equal opportunities to people regardless of age, gender, religion, belief, race, sexuality or disability. We operate as an employment agency and employment business. You'll find a wide selection of vacancies on our website.
Web Developer
Posted today
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Job Description
Our client is a global software organisation with their Uk headquarters in stunning offices based in central London. They are now seeking a Web Designer for an interesting 12 month contract.
This is a hybrid role with 2-3 days a week in the office.
Skills
HTML, CSS, JavaScript, Python, Java, PHP. attention to detail, adaptability, communication, and creativity.
Responsibilities
- Designing and coding websites using languages like HTML, CSS, and JavaScript, testing and debugging applications for bugs and performance,
- Collaborating with designers and clients to understand requirements,
- Optimizing sites for speed and SEO, and staying updated with new technologies and best practices to create user-friendly, functional, and secure web experiences
Benefits
- Long contract
- Global company.
- Possible extension
- Free breakfast