1,725 Stack jobs in the United Kingdom

We’re Breakroom ( Our mission is to turn every job into a good job. We’re building a community powered rating for every job in the world, and publishing it all online. 

We’re making sure everyone has access to great information to power the next step in their career, and we’re supporting employers to create good jobs along the way. More than 2,000,000 people have taken the Breakroom Quiz, and we’ve rated more than 18,000 employers across the UK and USA.

We’re building a world-class, inclusive team and we welcome applications from all groups.

We’ve recently launched Breakroom in the US, and we’re growing our team to help us scale up. We’re looking for people who want to join an early stage engineering and product team as we develop in a new market. You will be responsible for:

• Designing, writing, shipping and maintaining code
• Building internal tools and shaping our processes
• Contributing expertise to decisions that guide the future of the product and the team

Our platform is built on Elixir, using the Phoenix web framework, on top of Postgres, Redis, Google PubSub and OpenSearch. We love it, and think you will too. We don’t expect you to have experience writing Elixir/Phoenix and we’ll support you to learn it on the job.

We use a lightweight agile approach to product development, leaning heavily on data for decision making, and always centering our users’ needs. We’re a very collaborative team – you can expect to be working closely with designers and product managers as well as your fellow engineers. To support collaborative working, we work on-site at our office in Shoreditch, London, on Tuesdays and Wednesdays every week. We ship changes many times a day, and encourage engineers to be part of the full lifecycle of their work.

Our interview process is all done remotely via video call. All candidates at Breakroom will first have:

• An introduction call with one of our Talent Acquisition team
• A screening call with one of the Breakroom engineers

• A 1 hour take home exercise to be submitted to us ahead of your technical interview
• A technical interview which will consist of reviewing and discussing the take home exercise, collaborating on an engineering problem, and other general technical questions
• A “ways of working” interview with two people from other teams in Breakroom. This is the same interview for everyone regardless of the position being applied to
  

All being well, we’ll make you an offer!

Requirements

• Be motivated to work towards our mission
• Have a thorough working knowledge of how to build for the web
• Have in depth experience with a backend language such as Elixir, Ruby, Python or Node.JS
• Have experience with a full stack web framework such as Phoenix, Ruby on Rails or Django
• Have experience with React style frameworks (such as Preact) and also plain JavaScript for the web
• Have experience managing CSS/SASS
• Have experience collaborating closely with designers
• Had responsibility for developing complex features/services
• Be comfortable working with SQL databases
• Be able to effectively communicate complex technical ideas with people across the business
• Have experience working in cross functional teams
• Be able to participate in supporting Breakroom out of hours

• 5+ years of experience building software for the web
• Experience working on a consumer product, balancing meeting user needs with technical effort
• Experience writing Elixir or another functional programming language
• An interest in SEO, user experience, user research, or accessibility
• Experience working in a fast-paced small team
• Experience participating in operations for a high-traffic website
• Experience or an interest in mentoring and supporting other engineers
• Experience leading technical decisions in a cross functional team

Benefits

• Salary £65,000 - £87,500 plus competitive bonus
• Equity  
• Exceptional benefits package including:
• Private health and dental insurance
• Life insurance
• Company Pension scheme including employer match
• Mental health resources, financial and family planning, wellness and lifestyle stipend and more
• Flexible working hours
• Ability to work in London office Tuesdays and Wednesdays
• 25 days paid holiday

Privacy Notice:

For information about our processing of job applicant personal data, please see our Privacy Notice at: .

More About Us:

Breakroom is part of the ZipRecruiter Group, which includes ZipRecruiter, Inc. and its wholly-owned subsidiaries, including ZipRecruiter UK Ltd., ZipRecruiter Canada Ltd., ZipRecruiter Israel Ltd., and Poplar Technologies Ltd. (t/a Breakroom).

We are proud to be an equal opportunity employer and provide equal employment opportunities (EEO) to all employees and applicants without regard to race, ethnicity, colour, religion or belief, sex, pregnancy or maternity, national origin, age, disability, sexual orientation, marital status, gender identity or gender reassignment. We want to ensure your recruitment journey with us is a positive and equitable one, so please let us know if there are any reasonable adjustments, additional support, accessibility needs, or if there is any way in which we can support you through your application.

We’re looking for a Full-Stack Software Engineer (2–4 years experience) to join our Platform Performance team and help us deliver lightning-fast, scalable experiences to millions of users around the world.

In this role, you’ll work across the stack—sharpening frontend speed, optimizing backend services, and making our user interfaces more responsive, reliable, and delightful to use. You’ll collaborate with passionate engineers and product managers to identify performance bottlenecks, contribute to architectural improvements, and help evolve our design system.

This is a fantastic opportunity for an ambitious engineer looking to build their skills in a fast-paced environment and make a meaningful impact at scale.

Freelancer.com is the world's largest freelancing and crowdsourcing marketplace, connecting over 80 million users across 247 countries, regions, and territories. Our platform enables businesses, entrepreneurs, and individuals to collaborate with skilled professionals from anywhere in the world, turning ideas into reality faster than ever before.

Our mission is bold: to create one billion jobs globally by empowering people to work for themselves and build sustainable careers online. Every feature we ship and every performance improvement we make brings us one step closer to enabling opportunity at an unprecedented scale.

• Identify and solve performance issues across both frontend (Angular) and backend (PHP, Python, Go).
• Optimize page load speed, rendering performance, and API response times.
• Contribute to our design system and build reusable UI components using Angular and TypeScript.
• Help maintain and evolve scalable backend systems for high-performance APIs.
• Collaborate with cross-functional teams to implement best practices in performance, usability, and accessibility.
• Participate in architecture discussions and continuously improve our codebase and tooling.
• Promote and support performance monitoring and testing practices.

• 2–4 years of professional experience as a full-stack or frontend engineer.
• Solid experience with Angular and TypeScript.
• Comfort working with backend technologies like PHP, Python, or Go.
• A good understanding of frontend performance optimization techniques.
• Familiarity with RESTful API design and backend performance considerations.
• Experience building and maintaining reusable UI components.
• Exposure to design systems or component libraries.
• Strong communication skills and a collaborative mindset.
• A proactive attitude, with the ability to take ownership and see tasks through.

• Understanding of accessibility and UI/UX design principles.
• Familiarity with SEO and frontend performance metrics.
• Experience with automated testing (Jest, Cypress, PHPUnit, etc.).
• CI/CD or DevOps knowledge.
• Open-source contributions or personal projects.

• Work on a platform with global impact—we’re on a mission to create one billion jobs.
• A culture that values ownership, transparency, and meritocracy.
• Fast-track your growth with mentorship, real ownership, and exposure to internet-scale challenges.
• Weekly CEO town halls, quarterly hackathons, and team events to keep you engaged and inspired.
• A chance to help build the tools and systems that power the next generation of our platform.

About Arondite

Arondite is building the platform for Frontier Autonomy. We are looking for mission-driven engineers to join our highly motivated team and build things that make a difference.

The Role

You will be leading the development of software to enable autonomous systems to collaborate, process large sensor datasets, and build graphical user interfaces for the web and Android. User interfaces will involve the presentation of complex information in an intuitive way to enable tasking and control of multiple assets.

You will be expected to create flexible and maintainable code that will operate in mission-critical environments. The role will also involve interfacing with third-party APIs and the development and documentation of our own ones. You will iterate closely with end users to rapidly add and improve the most relevant features to support their priorities.

As an early member of our software engineering team, you'll have the opportunity to drive product development practices within the company. You will help with hiring as we continue to expand and influence the development of our engineering-driven culture.

Requirements

You should apply if you have:

• Degree in Computer Science, Engineering, or a related technical/scientific subject
• Strong core programming skills in object-orientated languages such C#, C++, Rust, Python or Java
• At least 2 years of experience building software products
• Cross-functional leadership experience
• Experience mentoring engineering teams and helping other engineers grow
• Experience developing performant and complex software systems and assessing architecture and design
• Experience with frontend development with Typescript and frameworks e.g. React
• Knowledge of & opinions on best development practices e.g. DevOps tooling, testing standards
• A deep enthusiasm for expanding your knowledge of a diverse technology stack

Note: The above describes the perfect candidate. We encourage you to apply even if you only partially fulfil this list.

Nice to have:

• Experience of architecting systems and designing APIs
• Knowledge of structured databases such as PostgreSQL
• Experience with machine learning applications and MLOps
• Understanding of working on embedded / resource-constrained devices
• Flexibility to travel and work with customers on-site when appropriate
• Experience developing software in secure environments

All engineers at Arondite are expected to:

• Communicate effectively within a multi-disciplinary team of hardware, software and AI engineers
• Be resourceful and open-minded in seeking solutions to engineering challenges
• Teach themselves to be the expert, if we don’t already have one in a particular area

Please note: This is an in-person position based in London. The successful candidate must, by the start of their employment, have permission to work in the UK.

Benefits

We offer:

• The opportunity to work with world-class engineers on a wide range of novel technologies
• Free training and education to quickly fill knowledge gaps
• The best resources and equipment required to do your job
• Exposure to working closely with customers on real problems
• Free meals and snacks in the office
• 7% employer pension contribution
• Employee Stock Options for everyone, so we all have a stake in the company’s growth
• Relocation support

Mid-Level Full Stack Developer

45,000 to 55,000 (Depending on Experience)

Braintree (On-site)

Permanent, Full-Time

About the Role
We're seeking a Mid-Level Full Stack Developer to join a growing Technology & Innovation team. You'll play a central role in building and enhancing web applications for a wide range of clients. This position offers the chance to take greater ownership of projects, contribute to architectural discussions, and drive improvements across the stack.

Key Responsibilities

• Develop and maintain scalable APIs, UI, and backend systems.
• Take ownership of project components, ensuring quality and timely delivery.
• Collaborate with senior developers and cross-functional teams.
• Contribute to design, architecture, and code reviews.
• Suggest and implement improvements to systems and processes.

Skills & Experience

• 4-6 years' experience with .NET, SQL, Angular, React, and REST APIs.
• Strong grasp of OOP, SOLID principles, and Agile delivery.
• Experience with version control (Git) and CI/CD pipelines.
• Familiarity with cloud platforms (Azure or AWS) is highly desirable.
• Bonus: experience with Power BI, React Native, or financial services.

Why Apply?

• Opportunity to progress into senior or leadership roles.
• Work on a modern tech stack with real-world business challenges.
• Be part of a collaborative and innovation-driven team.

Next Steps
If this opportunity sounds like the right move for your career, please apply with your CV. Shortlisted candidates will be contacted to discuss the role and outline the interview process.

Full Stack Developer
Exeter - On-site
35,000 - 40,000 + Private Healthcare + Pension + Holiday

This is an excellent opportunity for Full Stack Developer to join an industry leading manufacturing company, with not only rewarding duties and a supportive team, but massive potential for long-term development and career growth.

This company operates on a global scale, with thousands of employees worldwide. They manufacture world-class aerospace engine components and high-performance parts. They also have a remarkable staff retention rate due to its high staff satisfaction and have an established reputation for being a great place to work.

In this varied role you will be responsible for designing software solutions and ensuring their functionality through testing. Through the testing of software, you will discover and troubleshoot any issues through creating updates to maintain functionality of all software systems. You will also be expected to design and deploy SQL Databases to ensure optimal functionality and enhance existing codebases.

The ideal candidate will have a minimum of 2 years of experience within a Full Stack role, with an understanding of C#, VB .NET and MS SQL. Using this software, you will be capable of object orientated programming and writing in code to demonstrate expertise in both front and back-end development.

This is a fantastic opportunity for a Full Stack developer looking to further their career and join a market leading company that offers an exceptional benefits package.

The Role:

• Designing and testing software solutions.
• Troubleshoot issues to maintain system functionality.
• Design and Deploy SQL Databases.
• Front and Backend development.
• 5 Days onsite.

The Person:

• Previous experience with C# and VB .Net programming languages.
• Knowledge of Database development through MS SQL.
• A track record with object orientated programming.
• Ability to do Front and Backend development.

Reference Number: BBBH(phone number removed)

To apply for this role or for to be considered for further roles, please click "Apply Now" or contact Tom McLaughlin at Rise Technical Recruitment

This vacancy is being advertised by Rise Technical Recruitment Ltd. The services of Rise Technical Recruitment Ltd are that of an Employment Agency

Rise Technical Recruitment Ltd regrets to inform that our client can only accept applications from engineering candidates who have a valid legal permit or right to work in the United Kingdom. Potential candidates who do not have this right or permit, or are pending an application to obtain this right or permit should not apply as your details will not be processed.

Full Stack Developer (Java/Python)
London (Office Based)
75,000 - 85,000 + Progression + Training

An excellent opportunity awaits a software engineer with strong Python and Java experience looking to advance their career at an ML-driven SaaS business. This role offers technical growth, variety, and strong development opportunities.

The company is a profitable, growing business delivering AI-driven software solutions that optimise business processes in heavy industries.

In this role, you'll join a driven and ambitious development team, working across the full stack with Java, Python and Vue.js. You'll manage infrastructure and deployment pipelines, use automation tools, and work with DevOps and cloud technologies (AWS). You will join an autonomous team that values enthusiasm, proactiveness, and training and development. This role is office based, five days per week in the office based in Central London.

The ideal candidate is a hands-on software engineer with strong Java and Python and Front-End experience, confident working with AWS cloud infrastructure and data handling. Experience with building REST APIs and ETL pipelines is essential, with knowledge of containerisation (Docker/Kubernetes) being desirable.

This is a fantastic opportunity to join a growing business with exciting projects, technical variety, and great progression opportunities.

The Role:
*Full Stack Development of ML-Driven SaaS Platform (Java, Python and Vue.js)
*Manage infrastructure, deployment pipelines, automation, and cloud technologies
*Progression opportunities, interesting projects and strong technical variety
*Fully office-based role in Central London

The Person:
*Experienced hands-on software engineer with strong Java and Python and front-end experience
*Strong AWS cloud infrastructure and data handling experience
*Skilled in building REST APIs and ETL pipelines
*Live within commutable distance to Central London and happy to be office based.

Reference Number: BBBH (phone number removed)

To apply for this role or to be considered for further roles, please click "Apply Now" or contact Marcel Cerek at Rise Technical Recruitment.

Rise Technical Recruitment Ltd acts as an employment agency for permanent roles and an employment business for temporary roles.

The salary advertised is the bracket available for this position. The actual salary paid will be dependent on your level of experience, qualifications and skill set. We are an equal opportunities employer and welcome applications from all suitable candidates.

Hays are now looking for a Senior Full Stack Developer.

• Contract (6 months) to permanent
• 500 p/d then 80k - 93k after 6 months
• 1 day a week a week in the office, rest is WFH
• Various Locations

A leading fintech business has partnered with us exclusively to help expand its engineering team and are looking for Full Stack Developers to join on a 6-month contract (inside IR35) with a guaranteed path to permanent employment. These roles are perfect for developers who want to make a long-term impact in a fast-paced, high-growth tech environment.


What You'll Be Building

You'll help drive innovation in international payments, forex, and e-commerce platforms. Collaborate with agile teams to build scalable systems that power global transactions.


Tech Stack & Responsibilities

.NET, C#, JavaScript, TypeScript
RESTful APIs, MS SQL Server, T-SQL
Agile, CI/CD, unit testing (xUnit, Moq)
Distributed systems, service buses, multithreading
Legacy support:
VB.NET, VB6 (nice to have)
Mentoring junior devs & contributing to architecture

If you are interested in the above role please apply now or send a copy of your CV to

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)

• Strong HTML5, CSS/SCSS, PHP and JavaScript skills.
• Experience creating bespoke WordPress sites and themes from scratch.
• Understanding of SEO principles from a build perspective.
• An eye for design and appreciation for good UX/UI.
• Git knowledge and familiarity with the LAMP stack.
• Desired but not required: Timber, Twig, Tailwind/Bootstrap, Laravel, Vue, Shopify Liquid, HubSpot CMS, Agile experience, Ubuntu/Apache, REST principles.

• Building responsive, accessible, standards-compliant websites using WordPress, HubSpot, Shopify, Laravel and Vue.
• Turning creative concepts into seamless, functional experiences.
• Working across a variety of projects - from quick-turnaround campaigns to full-scale web apps.
• Writing clean, efficient, future-proof code.
• Collaborating with designers, copywriters, and client services teams.