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Staff Software Developer on our Services team, you will immerse yourself in our ambitious mission and take on a wide range of responsibilities to drive customer impact.

Three or more years of professional experience working in a software development team, as a developer, tester or other similar role. Are you a Frontend Software Developer wanting to use your skills to help people in a humanitarian crisis and ultimately help save lives? MapAction can enable you to vo

Our team brings together talented developers from across the US, UK, and Eastern Europe, each contributing unique perspectives and expertise to drive success. We’re looking for creative, entrepreneurial developers who are excited to build world-class products for small businesses and their custome

This opportunity is only for candidates currently residing in the specified country.Your location may affect eligibility and rates.We believe in using the power of collective intelligence to ethically shape the future of AI.The Mindrift platform connects specialists with AI projects from major tech

Collabora is looking for a passionate and enthusiastic open-source software developer, with good knowledge of at least one of OpenGL or Vulkan, to join our ever growing geographically-distributed Graphics domain team.

We are always looking for passionate and talented software developers to join our geographically-distributed engineering team. Discussing technology with clients and represent Collabora at conferences and trade shows to demonstrate and promote our leadership in the open source arena. Contributing

We are looking for a passionate and enthusiastic open-source software developer, with contributions to the Mesa 3D Graphics Library, to join our ever growing geographically-distributed Graphics domain team. Collabora is a software consultancy specializing in bringing companies and the Open Source co

Senior Backend Developer We’re looking for an experienced Magento backend developer to help lead the delivery of high-quality e-commerce solutions and mentor a growing team. JH is an e-commerce agency dedicated to helping growth-orientated brands make their next strategic breakthrough. We specialise in building, maintaining, and enhancing online stores enjoyed by millions worldwide. We work with notable clients across various markets and sectors, like Big Bus Tours, Graham and Green, and Woodies. We support their goals through strategic consulting, design, development, support, and ongoing optimisation. You’ll take a leading role in the development team, shaping the technical delivery of our projects and fostering an environment of collaboration and innovation. Your deep expertise in Magento, PHP, and backend technologies will ensure the solutions we build are robust, scalable, and aligned with client goals. You’ll be responsible for crafting and maintaining high-quality, scalable code while ensuring alignment with project requirements. Write clean, efficient, and scalable code in PHP (with basic JavaScript capabilities). Lead the setup of new Magento projects, including version control and environment deployment. Deliver advanced coding solutions with Magento, PHP, and GraphQL. Optimise web applications for maximum speed and scalability. Take ownership of projects as the main developer, managing them from inception to completion. Advanced knowledge of Magento 2, PHP 8+, and GraphQL Good understanding of automated testing concepts and frameworks (PHPUnit, integration tests, API tests) Good understanding of server administration (Linux/Unix) and DevOps (CI/CD, Docker) Experience writing and maintaining automated tests (unit tests, integration tests, functional tests) Knowledge of performance optimization and caching (Redis, Varnish) Experience with monitoring and logging tools Project Experience Proven ability to deliver high-quality backend solutions for e-commerce platforms. Experience managing and maintaining projects as the main developer. Ability to independently set up and deploy Magento projects from scratch. Strong coaching and mentoring abilities. Highly organised with exceptional planning abilities. Remote readiness Comfortable working in a remote-first environment using tools like Slack, Google Meets, and Loom. Have a suitable working environment for remote work and productive collaboration. Willing to travel occasionally for team and client meetings. Remote working ~ Flexible hours (with time banking) ~31 days annual leave (inclusive of Bank Holidays) for UK employees ~ Funds for professional development and home office setup ~ Top-of-the-range hardware and software ~ Remote socials and in-person events (twice a year) Chat: We have an informal call with suitable candidates.

Senior Backend Developer We’re looking for an experienced Magento backend developer to help lead the delivery of high-quality e-commerce solutions and mentor a growing team. JH is an e-commerce agency dedicated to helping growth-orientated brands make their next strategic breakthrough. We specialise in building, maintaining, and enhancing online stores enjoyed by millions worldwide. We work with notable clients across various markets and sectors, like Big Bus Tours, Graham and Green, and Woodies. We support their goals through strategic consulting, design, development, support, and ongoing optimisation. You’ll take a leading role in the development team, shaping the technical delivery of our projects and fostering an environment of collaboration and innovation. Your deep expertise in Magento, PHP, and backend technologies will ensure the solutions we build are robust, scalable, and aligned with client goals. You’ll be responsible for crafting and maintaining high-quality, scalable code while ensuring alignment with project requirements. Write clean, efficient, and scalable code in PHP (with basic JavaScript capabilities). Lead the setup of new Magento projects, including version control and environment deployment. Deliver advanced coding solutions with Magento, PHP, and GraphQL. Optimise web applications for maximum speed and scalability. Take ownership of projects as the main developer, managing them from inception to completion. Advanced knowledge of Magento 2, PHP 8+, and GraphQL Good understanding of automated testing concepts and frameworks (PHPUnit, integration tests, API tests) Good understanding of server administration (Linux/Unix) and DevOps (CI/CD, Docker) Experience writing and maintaining automated tests (unit tests, integration tests, functional tests) Knowledge of performance optimization and caching (Redis, Varnish) Experience with monitoring and logging tools Project Experience Proven ability to deliver high-quality backend solutions for e-commerce platforms. Experience managing and maintaining projects as the main developer. Ability to independently set up and deploy Magento projects from scratch. Strong coaching and mentoring abilities. Highly organised with exceptional planning abilities. Remote readiness Comfortable working in a remote-first environment using tools like Slack, Google Meets, and Loom. Have a suitable working environment for remote work and productive collaboration. Willing to travel occasionally for team and client meetings. Remote working ~ Flexible hours (with time banking) ~31 days annual leave (inclusive of Bank Holidays) for UK employees ~ Funds for professional development and home office setup ~ Top-of-the-range hardware and software ~ Remote socials and in-person events (twice a year) Chat: We have an informal call with suitable candidates.

We are always looking for passionate and talented software developers to join our geographically-distributed engineering team. Defining and scoping client projects in collaboration with the delivery team Contributing publicly to open source projects to ensure Collabora's continuing technical leade

By actively applying intelligence to agent traces and automatically surfacing the most critical patterns, Braintrust gives teams the visibility to understand how agents behave in production and the tools to improve them. Teams at Notion, Stripe, Box, OpenAI, and Cloudflare use Braintrust to trace their agents, find the issues in their observability data, and run evals that tell them how to improve. At Braintrust, surprisingly good developer support is one of our most important strategic advantages. Our customers are developers building LLM-powered applications, and they move fast. We win by helping them move faster. We’re looking for Developer Support Engineers — both mid-level and senior — who are obsessed with helping developers overcome challenging technical blockers to achieve their goals. You’ll troubleshoot issues, identify workarounds, ship fixes, and document your findings to help future developers move faster. This role will be remote based in London. Diagnose, troubleshoot, and resolve API and SDK use issues alongside customers codebases (Python or TypeScript). Own support communications with developers using Braintrust — primarily via Slack and email — and build trust through clear, technical, and empathetic communication. Identify opportunities to improve the developer experience, including tools, documentation, and support workflows. Write scripts, fix bugs, and contribute to internal tooling that enhances the support process. Capture and relay customer feedback to Product and Engineering, helping shape roadmap priorities. Participate in on-call rotations, responding to critical customer issues or providing coverage during local holidays. Provide technical mentorship to cross functional peers and guide support processes and escalation handling. Experience supporting developer-facing products as a Software Engineer, Customer Engineer, Developer Success Engineer, Technical Account Manager, or similar customer facing technical role. Can write, debug, and reason through Python and/or TypeScript codebases. Are insatiably curious about use cases for LLMs and excited to support tools that make AI more measurable, reliable, and trustworthy. Bonus Points For Experience supporting developer tools, ML infrastructure, or observability platforms. Experience contributing to support tooling, documentation, or product-led growth initiatives. Have been a senior technical team member or tech lead in a high-growth environment, taking ownership of ambiguous technical scenarios. Build a culture of care, learning, and mutual support together Medical, dental, and vision insurance Daily lunch, snacks, and beverages Flexible time off Competitive salary and equity All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.

Do you want to work at the cutting edge of browser technologies? Are you interested in working on Development Tools? Join our engineering team, where you will be working on the next generation of compilers and virtual machines that target HTML5/WebAssembly, contributing to our vision of bringing any application to the Web. We are looking for an enthusiastic developer-to-be, interested in joining a very dynamic and rapidly growing specialist software company developing WebAssembly solutions. This is a full-time paid internship position based in Amsterdam (near Amstel station), Netherlands, with a duration of 6 months, starting in April/May 2026. What we offer • Flexibility and part-remote work is guaranteed to all employees., • Join a team of incredibly talented minds, in a position with plenty of opportunities for personal and professional growth., • Get to work on challenging, complex and stimulating projects., • You will work with our CTO and other developers, and get 1-1 tutoring and guidance from the rest of the team. We have very minimal overhead, a flat structure, and we prefer to get to work rather than spend hours in meetings., • We offer high flexibility, family-friendly arrangements, and actively promote a good work-life balance., • This is a paid internship, you'll be compensated at 1600 EUR per month. What you will be doing: Each internship position will be focusing on one core development project, to be driven by the intern, under the 1-1 supervision of a senior developer. Project 1: Improve CheerpJ JIT CheerpJ ( is Java Virtual Machine that runs fully in the browser. It can run large scale Java applications and applets with no modifications, including code that uses multi-threading, reflection and other advanced Java features. CheerpJ uses it's sophisticated Just-In-Time compiler to build JavaScript functions out of the original Java bytecode. Your task will be to implement some self contained improvements to the JIT. • Familiarize yourself with CheerpJ, • Learn about Just-In-Time compilation, • Add new features to the JIT Project 2: Create new a new testing infrastructure using Nix Nix is a functional package manager that allows you to manage system configurations and packages deterministically via it's own functional programming language. We are in the process of building a Nix-based CI, and the next step is adding infrastructure to run workloads in the browser in order to test our products. • Familiarize yourself with Nix, • Design and implement a new testing infrastructure to fit in with our CI, • Add test workflows to our products Requirements • Being enrolled in a BSc/MSc or alternative education program in Computer Science or equivalent, ideally in the last year. Working experience in alternative will also be considered., • Some practical C/C++ development experience (including University projects) is required, • Understanding of object-oriented design principles, • Residence and right to work in the Netherlands About Leaning Technologies Leaning Technologies ( makes WebAssembly tools to run any software on any browser. We make solutions that enable C/C++, Java, Flash, and native Linux applications to be compiled, emulated and virtualised into HTML5/WebAssembly. Our tools are used to develop high-performance web apps in ‘traditional’ programming languages, to port existing code to the Web, or to preserve legacy applications by converting/emulating them to HTML5. We have a global client base including multiple Fortune-100 companies and public sector organisations, in sectors including financial services, CAD software, HR and operations, logistics, defence and aerospace, retail, science and education, and videogames. Our incredibly talented, tight-knit team works from different locations with a hybrid remote/office approach. Our main offices are Leeds, United Kingdom and Amsterdam, The Netherlands. We value a great, informal work environment, high flexibility, and having genuine fun and excitement every day at work. Want to see what it is all about? Join our Discord: and have a chat with our developers!

About Wintermute Wintermute is one of the largest crypto-native algorithmic trading companies in digital assets. We provide liquidity algorithmically across most cryptocurrency exchanges and trading platforms, a broad range of OTC trading solutions as well as support high profile blockchain projects and traditional financial institutions moving into crypto. Wintermute also has a Wintermute Ventures arm that invests in early stage DeFi projects. Wintermute was founded in 2017 by industry leaders and has successfully navigated crypto industry cycles. Culturally, we combine the best of the two worlds: the technology standards of high-frequency trading firms in traditional markets and the innovative and entrepreneurial culture of technology startups. To Wintermute digital assets is not just another asset class, we believe in the innovative potential of blockchain, the fundamental innovations, we have a long-term view on the digital asset market and are taking a leadership position in building an innovative and compliant market. Read more here. Working at Wintermute We are looking for a C++ Trading Platform Developer who is passionate about technology, interested in both low level details of how computer hardware operates and high-level design of large systems, as well as in data infrastructure. Someone who likes opening the hood to see how things work, has understanding of data structures, experience writing client-server network applications, and writing and optimising code for high performance. We welcome your previous experience from your own personal projects as well as commercial experience. We are looking for people who are passionate about technology and have experience looking under the hood to see how C++ standard libraries and other solutions are implemented. Interest in algorithmic and quantitative trading is a plus. At Wintermute you will have an opportunity to grow and make direct impact on trading by developing and improving all the parts of the trading platform, data infrastructure and related software, while also getting advice and guidance from very experienced developers and traders, including the founders. You will get a lot of independence and responsibility right away, and you'll learn at an unprecedented speed! No legacy systems, no multiple levels of approvals, no bureaucracy; all developers report directly to CTO who is very hands on. You are judged by what you deliver, not by the hours your do. It is up to you to make an impact! You will work alongside exceptionally sharp colleagues, learn how to write fail-safe code and improve performance and scalability of the trading system, a real challenge and a rare opportunity! We have flexible working arrangements, it’s the productivity that matters. What will you work on A great advantage of this position is that it is varied, and it is also up to you to shape it in the direction that matches your talents and company needs. The focus of the role would be to work on the global trading platform that spans across many continents, with real time data capture, order entry on dozens of exchanges, robust connectivity and built in monitoring. You would be working on expanding and scaling up our trading platform, mainly using C++ and Python. All the workstations and servers are running Linux, no windows in trading and the development team. We also keep things simple and easy to understand wherever possible which means designing, scalable and robust C++ and Python code is a main skill. We will share more technical details in the interviews. You will have opportunity to improve your knowledge of software optimisations, of building robust large-scale systems and to understand crypto currency trading. \n Hard Skills requirements • Strong C++ skills are required - we will test, • Experience with looking under the hood to see how C++ standard libraries work - we will test, • Strong analytical skills - we will test, • Understanding of networking, CPU and memory model, assembly language - desirable Join our dynamic team and benefit from: • Working at one of the most innovative trading firms globally., • Engaging projects offering accelerated responsibilities and ownership compared to traditional finance environments., • A vibrant working culture with frequent team meals, holiday celebrations, gaming events, and company-wide outings, including our annual Wintermute weekend getaway., • A Wintermute-inspired office in central London, featuring an array of amenities such as table tennis and foosball, personalized desk configurations, a cozy team breakout area with games and free food., • Great company culture: informal, non-hierarchical, ambitious, highly professional with a startup vibe, collaborative and entrepreneurial., • A performance-based compensation with a significant earning potential alongside standard perks like pension and private Health insurance. Note: • Although we are unable to accept fully remote candidates, we support significant flexibility in regards to working from home and working hours., • We offer UK work permits and help with relocation Find out more: \n

Senior Backend Developer We’re looking for an experienced Magento backend developer to help lead the delivery of high-quality e-commerce solutions and mentor a growing team. JH is an e-commerce agency dedicated to helping growth-orientated brands make their next strategic breakthrough. We specialise in building, maintaining, and enhancing online stores enjoyed by millions worldwide. We work with notable clients across various markets and sectors, like Big Bus Tours, Graham and Green, and Woodies. We support their goals through strategic consulting, design, development, support, and ongoing optimisation. You’ll take a leading role in the development team, shaping the technical delivery of our projects and fostering an environment of collaboration and innovation. Your deep expertise in Magento, PHP, and backend technologies will ensure the solutions we build are robust, scalable, and aligned with client goals. You’ll be responsible for crafting and maintaining high-quality, scalable code while ensuring alignment with project requirements. Write clean, efficient, and scalable code in PHP (with basic JavaScript capabilities). Lead the setup of new Magento projects, including version control and environment deployment. Deliver advanced coding solutions with Magento, PHP, and GraphQL. Optimise web applications for maximum speed and scalability. Take ownership of projects as the main developer, managing them from inception to completion. Advanced knowledge of Magento 2, PHP 8+, and GraphQL Good understanding of automated testing concepts and frameworks (PHPUnit, integration tests, API tests) Good understanding of server administration (Linux/Unix) and DevOps (CI/CD, Docker) Experience writing and maintaining automated tests (unit tests, integration tests, functional tests) Knowledge of performance optimization and caching (Redis, Varnish) Experience with monitoring and logging tools Project Experience Proven ability to deliver high-quality backend solutions for e-commerce platforms. Experience managing and maintaining projects as the main developer. Ability to independently set up and deploy Magento projects from scratch. Strong coaching and mentoring abilities. Highly organised with exceptional planning abilities. Remote readiness Comfortable working in a remote-first environment using tools like Slack, Google Meets, and Loom. Have a suitable working environment for remote work and productive collaboration. Willing to travel occasionally for team and client meetings. Remote working ~ Flexible hours (with time banking) ~31 days annual leave (inclusive of Bank Holidays) for UK employees ~ Funds for professional development and home office setup ~ Top-of-the-range hardware and software ~ Remote socials and in-person events (twice a year) Chat: We have an informal call with suitable candidates.

.NET Developer, C#, .NET 9, Angular 19, Web API 2 - Watford (Tech stack: .NET Developer, .NET 9, Web API 2, Entity Framework, Microservices, Azure, Programmer, Full Stack Engineer, Architect, .NET Developer) Have you ever thought about getting from London to Edinburgh in 30 minutes? My client, a world leader in aerospace technology, is undertaking research into a subsonic train transportation system similar to Hyperloop. Hyperloop and other subsonic transportation systems are futuristic train-like modes of transport capable of speeds over 700mph. Their R&D centres in the UK need talented .NET Developers to help build software applications and cloud platforms for advanced data analytics and capturing information from high-speed tests conducted daily. Applicants should have knowledge of: .NET, .NET Core / ASP.NET MVC, C#, and Azure SQL. Training will be provided in: .NET 9, Web API 2, Entity Framework, Microservices, Azure, JavaScript, Angular 19, Bootstrap, Agile, and MongoDB. All positions offer the following benefits: • 15% bonus, • 10% pension, • Weekly office code competition, • 5 days of brainstorming time per month, • 28 days holiday + 1 day off on your birthday Location: Watford, Hertfordshire, UK / Remote Working Salary: £35,000 - £65,000 + Bonus + Pension + Benefits Applicants must be based in the UK and have the right to work in the UK, although remote working is available. Noir continues to be the leading Microsoft recruitment agency; we can help you make the right career decisions! NOIRUKNETREC NOIRUKREC #J-18808-Ljbffr

We are looking for a passionate and enthusiastic open-source software developer, with contributions to the Mesa 3D Graphics Library, to join our ever growing geographically-distributed Graphics domain team. Defining and scoping client projects in collaboration with the delivery team Contributing p

What You’ll Do: Design and develop innovative Resident Engagement products Work across the entire software development lifecycle (SDLC) Contribute to the vision and future roadmap of the Resident Experience platform Collaborate with internal and outsourced teams to build high-quality, maintainable