1 to 25 of 42 Senior Developer Jobs in the City of London

Senior C# Developer - Commodities Trading - Outside IR35 Exciting opportunity for an experienced senior developer to build on their experience in Commodities or similar trading development role in this successful Commodities Trading company. £750 - 800 per day Outside IR35 The Senior C# Developer will have significant prior experience as a Senior Software Engineer/… Senior Developer working as C# Developer in a Commodities trading environment where they will have gained knowledge of the full trade life-cycle and feel comfortable speaking directly to traders and senior stakeholders in the business as well as senior technical colleagues such as architects. Central London location, with Hybrid working expected. Very strong core More ❯

Mid-Senior Developer | Angular | Rapidly Expanding Tech Company My client are seeking a Mid/Senior level Front End Developer with a passion for Angular to join their team. You'll be a key contributor to the engineering efforts, working closely with both the leadership and UX teams to enhance and scale core platforms. This is … Complex Problems: Address environment issues and platform challenges, and contribute to the design of a scalable, modular architecture. What we're looking for: Proven experience as a Mid or Senior developer with deep expertise in Angular . Experience with complex, high-traffic web platforms. Familiarity with version control systems, such as Git. Understanding of front-end testing frameworks … and tools (e.g., Jasmine, Karma, Protractor). A collaborative mindset and a desire to contribute to a high-performance culture. If you are a talented and experienced developer looking to make a significant impact on a growing business, we encourage you to apply. More ❯

Mid-Senior Developer | Angular | Rapidly Expanding Tech Company My client are seeking a Mid/Senior level Front End Developer with a passion for Angular to join their team. You'll be a key contributor to the engineering efforts, working closely with both the leadership and UX teams to enhance and scale core platforms. This is … Complex Problems: Address environment issues and platform challenges, and contribute to the design of a scalable, modular architecture. What we're looking for: Proven experience as a Mid or Senior developer with deep expertise in Angular . Experience with complex, high-traffic web platforms. Familiarity with version control systems, such as Git. Understanding of front-end testing frameworks … and tools (e.g., Jasmine, Karma, Protractor). A collaborative mindset and a desire to contribute to a high-performance culture. If you are a talented and experienced developer looking to make a significant impact on a growing business, we encourage you to apply. More ❯

Senior Mobile Software Developer Tech : React Native, JavaScript, Android, iOS Why? start-up financial services, revolutionising the industry Location : Hybrid - 1/2 days in the office (Central London) Salary : £80,000 - £100,000 + benefits Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair … flexible, and user-friendly financial products to consumers. The organisation is committed to empowering individuals by enhancing their understanding and control of personal finance through clarity, intelligence, and technology. Senior Mobile Software Developer - Responsibilities Design, develop, and maintain advanced applications using React Native. Collaborate with cross-functional teams to define, design, and ship new features. Optimize components for … quality and speed. Troubleshoot and debug to optimize performance. Provide code reviews, feedback, and mentorship to junior developers. Stay up-to-date with new technology trends, applications, and protocols Senior Mobile Software Developer - Experience Required Proven track record of developing and maintaining high-quality mobile applications using React Native from concept through to launch. Focus on how app More ❯

Senior Full Stack Mobile Developer Tech : React Native, JavaScript, Android, iOS Why? start-up financial services, revolutionising the industry Location : Hybrid - 2 days in the office (Central London) Salary : £80,000 - £100,000 benefits Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and … user-friendly financial products to consumers. The organisation is committed to empowering individuals by enhancing their understanding and control of personal finance through clarity, intelligence, and technology. Senior Full Stack Mobile Developer - Responsibilities Design, develop, and maintain advanced applications using React Native. Collaborate with cross-functional teams to define, design, and ship new features. Optimize components for maximum … quality and speed. Troubleshoot and debug to optimize performance. Provide code reviews, feedback, and mentorship to junior developers. Stay up-to-date with new technology trends, applications, and protocols Senior Full Stack Mobile Developer - Experience Required Proven track record of developing and maintaining high-quality mobile applications using React Native from concept through to launch. Focus on how More ❯

Senior Full Stack JavaScript Developer Salary: 77,000 - 82,000 pa (depending on experience) plus benefits, perks and healthcare options Location: Hybrid/2 x days per week - Travel to London Job Type: Permanent Security Clearance: This role is exclusively open to UK sole nationals who either hold or are eligible for Security Clearance (SC). We are … on the lookout for a talented and motivated Full Stack JavaScript Developer to join a dynamic Engineering team. If you're passionate about creating innovative web and mobile applications while ensuring high performance and scalability, this is your opportunity to make an impact! Your Role: Provide technical leadership and mentorship to a team of developers, guiding them through collaboration … of at least one leading Node framework (Express.js, Nest.js, Hapi.js) Expertise in at least one modern front-end framework (Nest.js, Remix.js). A track record in a lead or senior developer role, with experience of mentoring and guiding development teams. Proficiency in HTML5, CSS3, and JavaScript (ES6+). Security Clearance Requirements: You must be eligible for Security Check More ❯

Senior IOS Developer, London/Hybrid, 6 months, £500 - £550/day (Inside IR35) As a Manager Mobile Solutions, you will play a key role in delivering award winning, interactive experiences to our clients. You will drive the translation and construction of clients’ business problems into innovative technology solutions by creating and owning the technical vision of a More ❯

Senior IOS Developer, London/Hybrid, 6 months, £500 - £550/day (Inside IR35) As a Manager Mobile Solutions, you will play a key role in delivering award winning, interactive experiences to our clients. You will drive the translation and construction of clients’ business problems into innovative technology solutions by creating and owning the technical vision of a More ❯

carers deliver better care and for the home care companies to improve their operations and their regulatory compliance. The Role We are seeking a highly skilled and motivated Senior Mobile Developer to join our talented engineering team. This is a pivotal role that will act as a bridge between our dedicated Android and iOS developers, driving the future … will also lead a strategic initiative to leverage Kotlin Multiplatform (KMP) to abstract and share backend functionality across both platforms. This is an exciting opportunity for a forward-thinking developer to make a significant impact on a product that genuinely helps people every day. Responsibilities Feature Development: Design, develop, and implement new features for the CareLineLive Carer Companion App … latest trends and technologies in mobile development and advocate for their adoption where they can bring value to the team and the product. About you Proven experience as a Senior Mobile Developer with a strong portfolio of shipped applications on both Android and iOS. Expertise in Kotlin and a solid understanding of Swift . Demonstrable experience with or More ❯

Senior Software Developers specialising in trading systems required for an excellent client based in London. The successful Software Developer will join a extremely talented development team and you will be exposed to creating and maintaining our client's own applications based around a C#/.NET/SQL Server/ASP.NET universe. Many projects are greenfield projects and More ❯

care services are delivered and managed. Their innovative platform improves communication, efficiency, and care quality for providers, carers, and clients alike. We have an exciting opportunity for a talented Senior Mobile Developer to join their highly skilled engineering team and drive the future of their Carer Companion App. As a Senior Mobile Developer, you will play More ❯

Senior Android Engineer (Apps & SDK – Kotlin, Jetpack) Hybrid | 1 day/week in Central London | UK-based | Permanent A fast-growing, well-funded tech company in Fintech space is looking for a Senior Android Engineer to join their high-impact mobile team. About the Role: They’re looking for a Senior Android Engineer to help shape and More ❯

Senior Android Engineer (Apps & SDK – Kotlin, Jetpack) Hybrid | 1 day/week in Central London | UK-based | Permanent A fast-growing, well-funded tech company in Fintech space is looking for a Senior Android Engineer to join their high-impact mobile team. About the Role: They’re looking for a Senior Android Engineer to help shape and More ❯

Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices 💵 £70,000–95,000 base salary + Bonus 📦 Flexible benefits budget | 90 day work-from-anywhere perk 💻 Python, FastAPI, PostgreSQL, DynamoDB, AWS, EKS 📍 Remote first or hybrid (London) InsurTech | Modern, high traffic, scalable microservices development We’ve partnered with a well known name in the insuretech space - one of … and strong engineering leadership, they offer the right mix of scale-up pace, engineering maturity, and long-term growth potential. They're looking for a number of bright, engaging Senior and Lead Software Engineers familiar with or interested in working with their tech stack. Tech stack: Python (FastAPI) | gRPC | GraphQL | PostgreSQL | DynamoDB | AWS | EKS | CI/CD pipelines What … a profitable, product-focused company with ambitions to scale in 2025. You’ll be surrounded by experienced engineers and given the tools to take ownership and grow your career. Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices More ❯

Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices 💵 £70,000–95,000 base salary + Bonus 📦 Flexible benefits budget | 90 day work-from-anywhere perk 💻 Python, FastAPI, PostgreSQL, DynamoDB, AWS, EKS 📍 Remote first or hybrid (London) InsurTech | Modern, high traffic, scalable microservices development We’ve partnered with a well known name in the insuretech space - one of … and strong engineering leadership, they offer the right mix of scale-up pace, engineering maturity, and long-term growth potential. They're looking for a number of bright, engaging Senior and Lead Software Engineers familiar with or interested in working with their tech stack. Tech stack: Python (FastAPI) | gRPC | GraphQL | PostgreSQL | DynamoDB | AWS | EKS | CI/CD pipelines What … a profitable, product-focused company with ambitions to scale in 2025. You’ll be surrounded by experienced engineers and given the tools to take ownership and grow your career. Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices More ❯

in Microsoft tech, our solution helps companies deploy intelligent agents, automate workflows, and accelerate innovation at scale. As demand surges for our product, we are currently hiring for a Senior Python Developer with Azure experience and a footing with AI whos ready to move at our speed. If you're passionate about AI, thrive in agile, fast-paced … businesses create and manage powerful automation through models, agents, and reusable templates. Ready to build the future with us? The Role at a Glance: AI/Azure/Python Developer UK Remote Up to £90,000 Benefits include flexible remote work and an environment that values speed, quality, and autonomy. Product/Service: Neologik is an accurate, private & efficient More ❯

Guidewire Developer - Ace Certified Location London Salary: £90,000 - £110,000 per annum + 20% Bonus Type: Permanent, Hybrid (2 days in London) About the Role: An ACE Certified Guidewire Developer with experience with Guidewire for claims, and ClaimCenter configurations is required for a leading insurance organisation in London. The business is currently in the process of migrating … to Guidewire and would be looking for a developer to lead them through the migration process and to monitor and configure the platform, as well as architect and design solutions being pioneered within the Guidewire Cloud. This is a brand-new team with lots of scope for development and growth. You should have strong development skills in Java and More ❯

and effective implementation. Join us to be part of a dynamic team that thrives on creativity and excellence. Role Description This is a full time contract role for a Senior Shopify Developer with Creative Ecommerce. The role is remote and involves developing and customising Shopify themes, ensuring high website performance, and optimising user experience. Tasks include collaborating with More ❯

PHP Architect/Lead Developer Location: 100% Remote Contract: 6-month contract (potential extension) Start Date: ASAP About the Role We're seeking an experienced PHP Architect/Lead Developer to join our agile, forward-thinking technology team. Our in-house platforms power everything from industry-leading e-learning solutions to highly integrated office logistics, all hosted on … and craft raw SQL queries for performance. Translate complex business requirements into scalable, maintainable technical solutions. Build and maintain client and management reporting tools. Contribute to the evolution of developer tools, CI/CD pipelines, and AWS-based architectures. Mentor and provide technical guidance to less experienced developers. Support a global user base and ensure high-quality, well-documented … to shape the future of our platforms? Send your CV and a short cover letter highlighting relevant experience to (url removed) with the subject line "PHP Architect/Lead Developer - Contract". Randstad Technologies is acting as an Employment Business in relation to this vacancy. More ❯

the UK safer, one home at a time. Ranked in the top 25 best service companies to work for in the UK, we now have an opportunity for a Senior Full Stack Developer working within our IT team. Key Aspects of the role Develop and maintain web applications using Vue 3 for the front end and NestJS for More ❯

the UK safer, one home at a time. Ranked in the top 25 best service companies to work for in the UK, we now have an opportunity for a Senior Full Stack Developer working within our IT team. Key Aspects of the role Develop and maintain web applications using Vue 3 for the front end and NestJS for More ❯

SThree are pleased to announce we’re recruiting for a talented Senior Java Backend Developer to join & guide our excellent team based in our fantastic office space located in 8 Bishopsgate, London. SThree are building a new candidate digital experience to manage the interactions that candidates and contractors have with SThree. The first part of this journey is More ❯

SThree are pleased to announce we’re recruiting for a talented Senior Java Backend Developer to join & guide our excellent team based in our fantastic office space located in 8 Bishopsgate, London. SThree are building a new candidate digital experience to manage the interactions that candidates and contractors have with SThree. The first part of this journey is More ❯

Key Responsibilities: • Design, build, and maintain full-stack applications using TypeScript, Next.js, Node.js, and React. • Champion the shift-left approach by embedding quality early in the SDLC, writing unit, integration, and end-to-end tests alongside feature development. • Implement and More ❯

Key Responsibilities: • Design, build, and maintain full-stack applications using TypeScript, Next.js, Node.js, and React. • Champion the shift-left approach by embedding quality early in the SDLC, writing unit, integration, and end-to-end tests alongside feature development. • Implement and More ❯