42 senior software engineer jobs found in London

Joining a new discovery project > leading into delivery after approximately 1 month Full stack generalist role Start date ASAP Duration 6 months (Likely to extend) 2 days / week in person working (London) Joining a cross functional team of 8 Immediate Interviews   The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages.   Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We’ve been consistently profitable and have grown responsibly from the beginning.    We are based at Old Street in the heart of “tech city” and get thoroughly stuck in with the brilliant community around us. We run several meetups...

Client is a high profile sports / lifestyle organisation. 3 months initial contract - likely to extend to 12/18 months + Target start date Monday 21st July Building an entire greenfield set of products - Web App. Mobile Apps (Android and iOS) and a Platform Joining a cross functional team of 12 (engineers, delivery lead, product, product design, QA) Immediate interviews Ltd company outside IR35 or Umbrella contract. £Competitive day rate 2 days / week in person working (London & client office ((outside London towards the midlands))     The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages.     Our 3 founders, Dave, Cain and Stu, who have...

About Us Turing is one of the world’s fastest-growing AI companies, pushing the boundaries of AI-assisted software development. Our mission is to empower the next generation of AI systems to reason about and work with real-world software repositories. You’ll be working at the intersection of software engineering, open-source ecosystems, and frontier AI.   Project Overview We're building high-quality evaluation and training datasets to improve how Large Language Models (LLMs) interact with realistic software engineering tasks. A key focus of this project is curating verifiable software engineering challenges from public GitHub repository histories using a human-in-the-loop process.   Why This Role Is Unique Collaborate directly with AI researchers shaping the future of AI-powered software development. Work with high-impact open-source projects and evaluate how LLMs perform on real bugs, issues, and developer tasks....

Senior Full-Stack Software Engineer 6 months - Inside IR35 Hybrid - 3 days per week in Sunbury (West London) We are seeking an experienced and highly skilled Senior Full-Stack Software Engineer to join our client project engineering team, supporting the continued development of bespoke software product suite. This role is ideal for full stack developers with deep technical expertise across the software development life cycle who are comfortable working on complex, cloud-based systems. Position Overview As a Senior Engineer, you will: Design, implement, and test new product features with a focus on scalability and performance. Develop and enhance microservices-based Back End systems. Build responsive and accessible UI components compatible across modern web browsers. Take full ownership of feature development, from concept through to delivery. Contribute to architectural discussions and influence the technical direction of the product. Write...

  2 Openings LONDON       Role description Senior Software Engineer – T24 / Temenos Transact Expert London (Hybrid – 3 days onsite) Immediate Fixed term Employment / Contract inside IR35/ Permanent We are seeking a highly skilled Senior Software Engineer with deep expertise in T24 / Temenos Transact to join our technology team in London. This role is ideal for someone who thrives in a fast-paced, agile environment and is passionate about delivering scalable, high-quality financial solutions. The Role: Design, develop, and maintain complex T24/Temenos Transact solutions. Lead solution architecture and guide the development team through implementation. Promote agile principles including continuous delivery, early testing, and rapid iteration. Mentor engineers on development standards and best practices. Write clean, well-documented, and testable code....

Job Title: Senior Mobile Automation Test Engineer (Hybrid - London, UK) Company: Nyne Infotech Location: Hybrid (Commutable to London Victoria or Burgess Hill) Job Type: Full-Time/Contract Salary: Competitive About Us: We are a technology-driven company working on cutting-edge mobile applications, including a new mobile travel app. Our team is passionate about delivering seamless user experiences and using the latest tools to automate testing. We are looking for a Senior Mobile Automation Tester/ Engineer to join our hybrid team based in London. Title: Mobile Automation Tester (XCUITest/Espresso/JetPack) – 5+ Years of Mobile Experience Job Description: We are seeking a highly skilled Mobile Automation Tester with solid experience in native mobile application testing . The ideal candidate will have a strong focus on mobile automation using tools like XCUITest or Espresso/JetPack and a combination of both manual and...

Principal Software Engineer   Join a new discovery/greenfield project Project is to build a new platform for a global finance business Strong focus on backend (Encryption, Terrafrom, Kotlin) Experience with cloud infrastructure such as Azure, GCP, AWS Previous experience of influencing senior client stakeholders and support teams with technology and process enablers to support continuous delivery and DevOps ways of working Experience with multiple programming languages, in web and/or mobile and multiple paradigms (e.g. declarative, functional, object oriented…) Start date 1st September Duration 6 months (Likely to extend) 2 days / week in person working (London) Immediate Interviews   Principal Software Engineer The role We’re looking for a Principal Software Engineer to join our digital product delivery function.   Red Badger delivers high quality digital products...

Job Description: As a Senior Mobile Automation Test Engineer, you will be responsible for driving our mobile testing strategy and ensuring the quality and reliability of mobile applications. This is a key role, requiring expertise in mobile UI automation, integration testing, and regression testing, with a focus on native mobile frameworks. Key Responsibilities: Develop and maintain mobile test automation frameworks using XCUITest (iOS) and Espresso (Android). Drive testing strategy for mobile applications, including manual, automation, and regression testing. Collaborate with cross-functional teams (Product, Engineering, Design) to ensure test coverage and functionality. Perform non-functional testing including localization, performance (UI and network), and snapshot testing for design validation. Debug complex issues using tools like Charles Proxy, Splunk, and logcat. Integrate automated tests into CI/CD pipelines using Jenkins, GitLab...

What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work. Each definition shares a common thread: our unique culture. It's our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth. That's why we're building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we can change the world of financial technology. And all it takes is a winning mix...

About Us Network Squad is a leading Managed Service Provider (MSP) dedicated to delivering innovative IT solutions. We are looking for a highly skilled People to join our dynamic team immediately. The Role As an IT Support Engineer, you'll be responsible for providing on-site and remote support, troubleshooting hardware/software issues, and ensuring smooth IT operations for our clients across the UK. Key Responsibilities Respond to technical support requests via phone, email, or in person Diagnose and resolve issues related to desktops, laptops, printers, networks, and operating systems Configure, install, and maintain hardware and software Maintain documentation of support tasks and system configurations Travel to client sites when required (travel costs covered) Support Windows OS, Microsoft 365, network setups, and mobile devices Collaborate with senior engineers and project managers for escalated issues Requirements · Proven experience in IT support...

We are urgently looking for experienced candidates with strong hands-on Java development skills and design experience. While an architect title is not mandatory, we are particularly interested in profiles of senior developers with solid technical expertise. Required Core Skills: - Java - Python - GoLang -Design, develop, and maintain high-quality Java applications. -Write clean, efficient, and well-documented code. -Perform code reviews and optimize existing codebases. -Ensure application performance and reliability. -Develop and maintain automated tests to ensure code quality. -Work with CI/CD pipelines to streamline the development and deployment process. Job Types: Full-time, Freelance Pay: £350.00-£370.00 per day Schedule: Monday to Friday Experience: Java: 7 years (required) Python: 3 years (required) Go: 2 years (required)

Job Title: Senior Mobile Automation Test Engineer (Hybrid - London, UK) Company: Nyne Infotech Location: Hybrid (Commutable to London Victoria or Burgess Hill) Job Type: Full-Time/Contract Salary: Competitive About Us: We are a technology-driven company working on cutting-edge mobile applications, including a new mobile travel app. Our team is passionate about delivering seamless user experiences and using the latest tools to automate testing. We are looking for a Senior Mobile Automation Tester/ Engineer to join our hybrid team based in London. Title: Mobile Automation Tester (XCUITest/Espresso/JetPack) – 5+ Years of Mobile Experience Job Description: We are seeking a highly skilled Mobile Automation Tester with solid experience in native mobile application testing . The ideal candidate will have a strong focus on mobile automation using tools like XCUITest or Espresso/JetPack and a combination of both manual and automation testing . Key...

What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work. Each definition shares a common thread: our unique culture. It's our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth. That's why we're building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we  can  change the world of financial technology. And all it takes is a...

About Us Network Squad is a leading Managed Service Provider (MSP) dedicated to delivering innovative IT solutions. We are looking for a highly skilled People to join our dynamic team immediately. The Role As an IT Support Engineer, you'll be responsible for providing on-site and remote support, troubleshooting hardware/software issues, and ensuring smooth IT operations for our clients across the UK. Key Responsibilities Respond to technical support requests via phone, email, or in person Diagnose and resolve issues related to desktops, laptops, printers, networks, and operating systems Configure, install, and maintain hardware and software Maintain documentation of support tasks and system configurations Travel to client sites when required (travel costs covered) Support Windows OS, Microsoft 365, network setups, and mobile devices Collaborate with senior engineers and project managers for escalated issues Requirements · Proven experience in IT support...

We are urgently looking for experienced candidates with strong hands-on Java development skills and design experience. While an architect title is not mandatory, we are particularly interested in profiles of senior developers with solid technical expertise. Required Core Skills: - Java - Python - GoLang -Design, develop, and maintain high-quality Java applications. -Write clean, efficient, and well-documented code. -Perform code reviews and optimize existing codebases. -Ensure application performance and reliability. -Develop and maintain automated tests to ensure code quality. -Work with CI/CD pipelines to streamline the development and deployment process. Job Types: Full-time, Freelance Pay: £350.00-£370.00 per day Schedule: Monday to Friday Experience: Java: 7 years (required) Python: 3 years (required) Go: 2 years (required)

Job Title: Senior Mobile Automation Test Engineer (Hybrid - London, UK) Company: Nyne Infotech Location: Hybrid (Commutable to London Victoria or Burgess Hill) Job Type: Full-Time/Contract Salary: Competitive About Us: We are a technology-driven company working on cutting-edge mobile applications, including a new mobile travel app. Our team is passionate about delivering seamless user experiences and using the latest tools to automate testing. We are looking for a Senior Mobile Automation Tester/ Engineer to join our hybrid team based in London. Title: Mobile Automation Tester (XCUITest/Espresso/JetPack) – 5+ Years of Mobile Experience Job Description: We are seeking a highly skilled Mobile Automation Tester with solid experience in native mobile application testing . The ideal candidate will have a strong focus on mobile automation using tools like XCUITest or Espresso/JetPack and a combination of both manual and automation testing . Key...

What is Flagstone? Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work. Each definition shares a common thread: our unique culture. It's our pride and joy. And our competitive advantage. A feel for our culture: To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth. That's why we're building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it. We may not change the world, but we  can  change the world of financial technology. And all it takes is a...

About Us Network Squad is a leading Managed Service Provider (MSP) dedicated to delivering innovative IT solutions. We are looking for a highly skilled People to join our dynamic team immediately. The Role As an IT Support Engineer, you'll be responsible for providing on-site and remote support, troubleshooting hardware/software issues, and ensuring smooth IT operations for our clients across the UK. Key Responsibilities Respond to technical support requests via phone, email, or in person Diagnose and resolve issues related to desktops, laptops, printers, networks, and operating systems Configure, install, and maintain hardware and software Maintain documentation of support tasks and system configurations Travel to client sites when required (travel costs covered) Support Windows OS, Microsoft 365, network setups, and mobile devices Collaborate with senior engineers and project managers for escalated issues Requirements · Proven experience in IT support...

We are urgently looking for experienced candidates with strong hands-on Java development skills and design experience. While an architect title is not mandatory, we are particularly interested in profiles of senior developers with solid technical expertise. Required Core Skills: - Java - Python - GoLang -Design, develop, and maintain high-quality Java applications. -Write clean, efficient, and well-documented code. -Perform code reviews and optimize existing codebases. -Ensure application performance and reliability. -Develop and maintain automated tests to ensure code quality. -Work with CI/CD pipelines to streamline the development and deployment process. Job Types: Full-time, Freelance Pay: £350.00-£370.00 per day Schedule: Monday to Friday Experience: Java: 7 years (required) Python: 3 years (required) Go: 2 years (required)

Senior Consulting Engineer (Armakuni Network - Contractor... Armakuni is a team of highly experienced software engineers dedicated to helping complex organisations build high-performing software teams. We accelerate the delivery of business outcomes by driving behavioural change through coaching, training, and pair programming. Our approach involves identifying gaps in an organisation's engineering capability and transferring our skills and knowledge to create sustainable change and a culture of continuous improvement. This isn't an advertisement for an immediate, full-time role. Instead, we are excited to invite talented Senior Consulting Engineers to join Armakuni Network – our strategic internal program designed to build a dynamic and readily available network of highly skilled contractors. The Synapses program empowers us to rapidly deploy the precise talent our clients need, minimising delays and maximising engagement momentum for future project-based...