151 to 175 of 348 Senior Software Engineer Jobs in London

Senior Software Engineer - Backend & Data | Fully Remote (UK) Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Role Information: Salary : Up to £100,000 (DOE) + … strong Product mindset to every decision. This role is ideal for someone who thrives on turning early-stage ideas into scalable, market-ready Products backed by solid Data pipelines. Senior Product Engineer - Highlights: Enhance and scale backend services in Python Architect event-driven solutions in GCP with Pub/Sub & Cloud Run Build and optimise Python code for More ❯

Senior Software Engineer - Backend & Data | Fully Remote (UK) Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Role Information: Salary : Up to £100,000 (DOE) + … strong Product mindset to every decision. This role is ideal for someone who thrives on turning early-stage ideas into scalable, market-ready Products backed by solid Data pipelines. Senior Product Engineer - Highlights: Enhance and scale backend services in Python Architect event-driven solutions in GCP with Pub/Sub & Cloud Run Build and optimise Python code for More ❯

Senior Software Engineer - Backend & Data | Fully Remote (UK) Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Role Information: Salary : Up to £100,000 (DOE) + … strong Product mindset to every decision. This role is ideal for someone who thrives on turning early-stage ideas into scalable, market-ready Products backed by solid Data pipelines. Senior Product Engineer - Highlights: Enhance and scale backend services in Python Architect event-driven solutions in GCP with Pub/Sub & Cloud Run Build and optimise Python code for More ❯

Senior Software Engineer - Backend & Data | Fully Remote (UK) Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Role Information: Salary : Up to £100,000 (DOE) + … strong Product mindset to every decision. This role is ideal for someone who thrives on turning early-stage ideas into scalable, market-ready Products backed by solid Data pipelines. Senior Product Engineer - Highlights: Enhance and scale backend services in Python Architect event-driven solutions in GCP with Pub/Sub & Cloud Run Build and optimise Python code for More ❯

About The Role Job Level: 9 UK Wide We are looking for a Senior Software Engineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software systems. This role involves mentoring junior engineers, collaborating with … cross-functional teams, and driving the adoption of best practices in software development. Responsibilities Design, develop, and maintain complex software solutions, ensuring they are robust, secure, tested and scalable. Contribute to software architecture decisions, ensuring alignment with project and business goals. Mentor and support junior engineers, helping to develop their skills and promote best practices. Collaborate with … cross-functional teams, including product management, UX/UI, DevOps, and QA, to ensure software meets business requirements. Implement and optimise CI/CD pipelines to enhance development efficiency and software quality. Conduct code reviews, providing constructive feedback to enhance team performance and code quality. Troubleshoot and resolve technical issues, ensuring software operates smoothly and efficiently. Stay More ❯

Software Engineer - Python/FastAPI/React/Functional programming/Typescript Location: London, UK (Hybrid) Type: Full-time Level: Mid to Senior Salary: £70,000 to £100,000 Company: VC back Startup About the Role: This startup is building a cutting-edge platform to transform how engineers design physical products. Instead of creating one solution at … thousands of design alternatives. Faster and more intelligently than ever before. Looking for someone who enjoys writing clean, wellstructured code and has a genuine interest in engineering.. not just software, but how things are built in the real world. Backed by one of Europe's leading VCs and with a 4-year runway. This company has assembled one of … the strongest technical founding teams I've seen. Bringing together brilliant minds from Cambridge, MIT, and Google across Software Engineering, Data Science, Theoretical Physics, and Computational Geometry. Opportunities: Frontend or Backend Tech Stack within the engineering environment: Backend: Python, FastAPI, Pydantic, PostgreSQL, Docker Frontend: React, TypeScript, Vite Infrastructure: GitHub Actions, GCP, Kubernetes (optional) Paradigms: Functional programming, async APIs, event More ❯

Software Engineer – Next-Generation Derivatives Risk Platform 📍 Location: London (Hybrid – 1 day/week in office, flexibility for the right candidate) 💰 Day Rate: £850 per day 🧾 IR35: Outside 🗓️ Interview Process: Starts 12th November 2025 🚀 Start Date: 5th January 2026 CV's are not being reviewed until WC 3rd November We’re partnering with a global investment bank to … hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high-calibre team solving complex engineering challenges and shaping the future of risk technology … DevOps, CI/CD Emerging tech: WebAssembly, AI integration, and AI frameworks Systems: Cross-platform, distributed, scalable real-time environments This is a genuine technologist’s role — building critical software that combines engineering precision, scalability, and innovation. What We’re Looking For Very strong expertise in one of C#, Python or Java , ideally with working knowledge of another. Rust More ❯

Software Engineer – Next-Generation Derivatives Risk Platform 📍 Location: London (Hybrid – 1 day/week in office, flexibility for the right candidate) 💰 Day Rate: £850 per day 🧾 IR35: Outside 🗓️ Interview Process: Starts 12th November 2025 🚀 Start Date: 5th January 2026 CV's are not being reviewed until WC 3rd November We’re partnering with a global investment bank to … hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high-calibre team solving complex engineering challenges and shaping the future of risk technology … DevOps, CI/CD Emerging tech: WebAssembly, AI integration, and AI frameworks Systems: Cross-platform, distributed, scalable real-time environments This is a genuine technologist’s role — building critical software that combines engineering precision, scalability, and innovation. What We’re Looking For Very strong expertise in one of C#, Python or Java , ideally with working knowledge of another. Rust More ❯

Software Engineer – Next-Generation Derivatives Risk Platform 📍 Location: London (Hybrid – 1 day/week in office, flexibility for the right candidate) 💰 Day Rate: £850 per day 🧾 IR35: Outside 🗓️ Interview Process: Starts 12th November 2025 🚀 Start Date: 5th January 2026 CV's are not being reviewed until WC 3rd November We’re partnering with a global investment bank to … hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high-calibre team solving complex engineering challenges and shaping the future of risk technology … DevOps, CI/CD Emerging tech: WebAssembly, AI integration, and AI frameworks Systems: Cross-platform, distributed, scalable real-time environments This is a genuine technologist’s role — building critical software that combines engineering precision, scalability, and innovation. What We’re Looking For Very strong expertise in one of C#, Python or Java , ideally with working knowledge of another. Rust More ❯

Software Engineer – Next-Generation Derivatives Risk Platform 📍 Location: London (Hybrid – 1 day/week in office, flexibility for the right candidate) 💰 Day Rate: £850 per day 🧾 IR35: Outside 🗓️ Interview Process: Starts 12th November 2025 🚀 Start Date: 5th January 2026 CV's are not being reviewed until WC 3rd November We’re partnering with a global investment bank to … hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high-calibre team solving complex engineering challenges and shaping the future of risk technology … DevOps, CI/CD Emerging tech: WebAssembly, AI integration, and AI frameworks Systems: Cross-platform, distributed, scalable real-time environments This is a genuine technologist’s role — building critical software that combines engineering precision, scalability, and innovation. What We’re Looking For Very strong expertise in one of C#, Python or Java , ideally with working knowledge of another. Rust More ❯

Senior Software Developer London – Twice a week in the office £70,000-£90,000 C#/Python/Azure I’m currently working for a well-established tech consultancy business of over 70 years who are based in Central London and looking for a Senior Software Developer , paying up to £90,000 and requiring office working More ❯

Senior Software Developer London – Twice a week in the office £70,000-£90,000 C#/Python/Azure I’m currently working for a well-established tech consultancy business of over 70 years who are based in Central London and looking for a Senior Software Developer , paying up to £90,000 and requiring office working More ❯

Senior Software Developer London – Twice a week in the office £70,000-£90,000 C#/Python/Azure I’m currently working for a well-established tech consultancy business of over 70 years who are based in Central London and looking for a Senior Software Developer , paying up to £90,000 and requiring office working More ❯

Senior Software Developer London – Twice a week in the office £70,000-£90,000 C#/Python/Azure I’m currently working for a well-established tech consultancy business of over 70 years who are based in Central London and looking for a Senior Software Developer , paying up to £90,000 and requiring office working More ❯

Senior Software Engineer Hybrid - 4 days a week in Central London £100k + Bonus + Equity Fin-Tech/Payments We’re working with a well funded, high-growth fintech start-up that’s building the next generation of financial automation. They're building an Ai powered, fully automated financial operating system and payment platform. This is … closely with leadership in a flat, agile team Competitive package – £100k + equity + bonus This isn’t a role for someone looking to coast. It’s for an engineer who loves solving technical challenges, enjoys working directly with customers, and wants to help build something big from the ground up. We cannot offer visa sponsorship for this role More ❯

Senior Software Engineer Hybrid - 4 days a week in Central London £100k + Bonus + Equity Fin-Tech/Payments We’re working with a well funded, high-growth fintech start-up that’s building the next generation of financial automation. They're building an Ai powered, fully automated financial operating system and payment platform. This is … closely with leadership in a flat, agile team Competitive package – £100k + equity + bonus This isn’t a role for someone looking to coast. It’s for an engineer who loves solving technical challenges, enjoys working directly with customers, and wants to help build something big from the ground up. We cannot offer visa sponsorship for this role More ❯

Senior Software Engineer Hybrid - 4 days a week in Central London £100k + Bonus + Equity Fin-Tech/Payments We’re working with a well funded, high-growth fintech start-up that’s building the next generation of financial automation. They're building an Ai powered, fully automated financial operating system and payment platform. This is … closely with leadership in a flat, agile team Competitive package – £100k + equity + bonus This isn’t a role for someone looking to coast. It’s for an engineer who loves solving technical challenges, enjoys working directly with customers, and wants to help build something big from the ground up. We cannot offer visa sponsorship for this role More ❯

Senior Software Engineer Hybrid - 4 days a week in Central London £100k + Bonus + Equity Fin-Tech/Payments We’re working with a well funded, high-growth fintech start-up that’s building the next generation of financial automation. They're building an Ai powered, fully automated financial operating system and payment platform. This is … closely with leadership in a flat, agile team Competitive package – £100k + equity + bonus This isn’t a role for someone looking to coast. It’s for an engineer who loves solving technical challenges, enjoys working directly with customers, and wants to help build something big from the ground up. We cannot offer visa sponsorship for this role More ❯

Senior Senior Engineer Up to £90k We are partnered with a high-growth, VC-funded Data Intelligence platform. They are looking for passionate, dynamic engineers with start-up experience. Details: Full Stack Environment: TypeScript, Node.js, React (Redux/Context API). A role focusing on full-stack architecture with some Data Pipelining. Location: Paddington, 3 days a More ❯

Senior Senior Engineer Up to £90k We are partnered with a high-growth, VC-funded Data Intelligence platform. They are looking for passionate, dynamic engineers with start-up experience. Details: Full Stack Environment: TypeScript, Node.js, React (Redux/Context API). A role focusing on full-stack architecture with some Data Pipelining. Location: Paddington, 3 days a More ❯

Senior Senior Engineer Up to £90k We are partnered with a high-growth, VC-funded Data Intelligence platform. They are looking for passionate, dynamic engineers with start-up experience. Details: Full Stack Environment: TypeScript, Node.js, React (Redux/Context API). A role focusing on full-stack architecture with some Data Pipelining. Location: Paddington, 3 days a More ❯

Senior Senior Engineer Up to £90k We are partnered with a high-growth, VC-funded Data Intelligence platform. They are looking for passionate, dynamic engineers with start-up experience. Details: Full Stack Environment: TypeScript, Node.js, React (Redux/Context API). A role focusing on full-stack architecture with some Data Pipelining. Location: Paddington, 3 days a More ❯

Senior C++ Software Developer, Python - Financial/Banking Candidates will have 5+ years C++ experience (ideally more) and excellent knowledge of Python - ideally coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity with some Low Latency experience. Job Overview You will work with the Product, Infrastructure and QA … teams, to produce high performance, low latency and highly reliable code. Your goal will be to develop software which handle large amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this role as a Senior Software Engineer C++, you will be a proponent of agile … methodology and modern software best practices. You can produce detailed technical work in OOP and work with other members of the Development team to produce code of high-quality standards. Ideally, you should have worked in critical systems development in the past. Responsibilities and Duties Codes, tests, integrates, and documents software. Provides technical leadership to more junior employees and More ❯

Senior C++ Software Developer, Python - Financial/Banking Candidates will have 5+ years C++ experience (ideally more) and excellent knowledge of Python - ideally coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity with some Low Latency experience. Job Overview You will work with the Product, Infrastructure and QA … teams, to produce high performance, low latency and highly reliable code. Your goal will be to develop software which handle large amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this role as a Senior Software Engineer C++, you will be a proponent of agile … methodology and modern software best practices. You can produce detailed technical work in OOP and work with other members of the Development team to produce code of high-quality standards. Ideally, you should have worked in critical systems development in the past. Responsibilities and Duties • Codes, tests, integrates, and documents software. • Provides technical leadership to more junior employees and More ❯

About Faculty At Faculty, we transform organisational performance through safe, impactful and human-centric AI. With more than a decade of experience, we provide over 350 global customers with software, bespoke AI consultancy , and Fellows from our award winning Fellowship programme . Our expert team brings together leaders from across government, academia and global tech giants to solve the … and learn from, some of the brilliant minds who are bringing Frontier AI to the frontlines of the world. About the Role We're looking for a full-stack Senior Software Engineer to work in our Customer Development team on our ground-breaking Frontier platform. Your role will focus on scaling our Decision Intelligence offering - providing AI … capabilities across high-impact decisions. This comes with genuinely interesting technical challenges, with huge space for creativity and influence. We're actively seeking a senior full-stack engineer to deliver our cutting-edge product, Frontier, to new clients. As we continue to expand our platform's reach, you'll have the unique opportunity to build a scalable AI More ❯