701 to 725 of 853 Software Engineering Jobs in the City of London

Contract Python Fullstack Software Engineer | £600-£800/day IR35 Exempt Python Software Engineer (Python, ReactJS, Kubernetes) £600-£800/day Initial 6 Month Duration IR35 Exempt Hybrid - Central London (3 days a week) We are partnered with a well-funded scale up in the BioTech sector who are developing software to support autonomous robotics. They are … end code in a Senior IC capacity. You’ll be a hands-on contributor who can move fluidly across the stack while also influencing architectural design. Experience building scalable software in Python, contributing to the end to end software development process Ability to contribute in areas such as DevOps (Kubernetes) and Front end development (ReactJS modifications) Experience working … with AWS Experience influencing the architecture and design of applications Tech Stack - Python, ReactJS, Kubernetes, APi's, websockets, AWS Contract Python Fullstack Software Engineer | £600-£800/day IR35 Exempt More ❯

Software Engineer | Climate Tech | London (Hybrid) Want to code for impact ? This early-stage climate tech startup is building the software powering the transition to a cleaner, smarter energy system - and they’re looking for engineers who love to move fast, solve hard problems , and see their work make a real difference. Backed by top-tier investors, the … low-carbon grid that actually works. 💡 Why join: High ownership and technical freedom Meaningful projects with real environmental impact The chance to help shape both the product and the engineering culture 🚀 What they value: Curiosity and a bias for action - ship fast, learn faster A genuine drive to tackle climate change through technology Comfort with ambiguity and startup pace … knit, mission-driven team They’re open to all OOP languages (core stack is Python ). 📍 London | Hybrid (2-3 days/week) If you’re ready to build software that accelerates the shift to clean energy - apply now More ❯

Software Engineer | Climate Tech | London (Hybrid) Want to code for impact ? This early-stage climate tech startup is building the software powering the transition to a cleaner, smarter energy system - and they’re looking for engineers who love to move fast, solve hard problems , and see their work make a real difference. Backed by top-tier investors, the … low-carbon grid that actually works. 💡 Why join: High ownership and technical freedom Meaningful projects with real environmental impact The chance to help shape both the product and the engineering culture 🚀 What they value: Curiosity and a bias for action - ship fast, learn faster A genuine drive to tackle climate change through technology Comfort with ambiguity and startup pace … knit, mission-driven team They’re open to all OOP languages (core stack is Python ). 📍 London | Hybrid (2-3 days/week) If you’re ready to build software that accelerates the shift to clean energy - apply now More ❯

Duration: 6 months Job Type: Hybrid - office based 2 days per week Job Description: Design, implement, and optimise live streaming capabilities into existing software-based video pipeline Leverage hardware acceleration to develop high-performance, low-latency video capture, processing, AI inference, visualization and streaming software Work as part of a multidisciplinary team to develop robust and secure-by … design software for a medical device Maintain a high level of quality and reliability in submitted code and participate in team code reviews Must Haves Expertise on WebRTC live video streaming development Expertise on software video pipelines (e.g., GStreamer and/or FFmpeg) Excellent C++ development skills with C++11 or higher, multi-threading, inter-process communication and performance More ❯

Duration: 6 months Job Type: Hybrid - office based 2 days per week Job Description: Design, implement, and optimise live streaming capabilities into existing software-based video pipeline Leverage hardware acceleration to develop high-performance, low-latency video capture, processing, AI inference, visualization and streaming software Work as part of a multidisciplinary team to develop robust and secure-by … design software for a medical device Maintain a high level of quality and reliability in submitted code and participate in team code reviews Must Haves Expertise on WebRTC live video streaming development Expertise on software video pipelines (e.g., GStreamer and/or FFmpeg) Excellent C++ development skills with C++11 or higher, multi-threading, inter-process communication and performance More ❯

Full-Stack Software Engineer - London - 5 days a week Location: London, central, fully onsite (early stage, London platform team) Salary: Up to £130,000 Seniority: 3–8 years | Permanent | Early hire on a small platform team I'm working with a well funded early stage AI platform looking for a versatile full-stack engineer to join the London platform … infrastructure for novel technical problems Own slices of the stack end to end, from SQL and backend logic to front end UX Work closely with a tiny, high-calibre engineering team and shape engineering practices and culture Tech profile I need 3 to 8 years of hands-on full-stack experience building production products Strong backend experience in More ❯

Full-Stack Software Engineer - London - 5 days a week Location: London, central, fully onsite (early stage, London platform team) Salary: Up to £130,000 Seniority: 3–8 years | Permanent | Early hire on a small platform team I'm working with a well funded early stage AI platform looking for a versatile full-stack engineer to join the London platform … infrastructure for novel technical problems Own slices of the stack end to end, from SQL and backend logic to front end UX Work closely with a tiny, high-calibre engineering team and shape engineering practices and culture Tech profile I need 3 to 8 years of hands-on full-stack experience building production products Strong backend experience in More ❯

time | Salary + Equity | Purpose-led startup Joyned is on a mission to help organisations build strong, safe communities through better communication. We’re looking for a hands-on software engineer to take ownership of our codebase and help shape how the product evolves. We’re a funded startup, built in partnership with Brightec (the team behind apps for … has already helped churches, charities, events and commercial organisations (including Hillsong, Big Church Festival, Newday and Lifetime Brands) transform how they connect with their communities. This is a solo engineering role, as we kick-off our in-house engineering team. You'll be our only full-time engineer, writing, testing and shipping code across the whole stack. You More ❯

Java Software Engineer Our client, a leading FX trading and liquidity solutions provider, is expanding its Core Engineering team and is looking for talented developers to build and optimise next-generation trading systems. What You’ll Do Design, develop, and enhance low-latency, high-throughput trading components. Work on real-time FX pricing, execution, and risk systems. Apply … Working Model Hybrid: 2 days per week onsite in Central London, 3 days remote. Why Join Work on cutting-edge trading systems used globally. Join a collaborative, high-calibre engineering culture. Competitive compensation and growth opportunities in a fast-moving environment. If you’re ready to take on complex engineering challenges and make an impact in global FX More ❯

We're looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You'll be instrumental in our transition away from Drupal as we modernise and scale our platform. Tech Stack: At least 4 years commercial experience with JavaScript or TypeScript and Node Exposure of Laravel and/or Python More ❯

scale. Our team works with Python, React, and AWS to deliver high performing and highly collaborative tools for global organisations. We are now looking for a Senior Full Stack Software Engineer to help lead the next stage of development. This is a hands-on role in a growing startup environment. You will work closely with the founding leadership team … gain exposure across the entire business, and play a meaningful role in shaping product, architecture, and engineering culture. Start date: ASAP Location: Remote-first within the UK with occasional team sessions in London Candidates must have the right to work in the UK Compensation: Based on experience Equity: Included through an employee share option scheme, aligned to long-term … AWS Maintain code quality standards, reviews, and pipeline maturity Support deployments, scaling, monitoring, and reliability Work closely with Product and Design teams Mentor engineers and contribute to growing the engineering function Who You Are Experience operating at senior level within a SaaS or product-led environment Strong knowledge of AWS services for production workloads Professional experience building in Python More ❯

innovation, helping R&D teams and Creators to invent, protect, and monetise ideas faster with AI at the heart of it (LLMs & Agentic AI). We're growing the engineering team that will be working shoulder to shoulder with some impressive co-founders. If you're comfortable with real autonomy and ownership, building fast, and solving problems end-to … seven figure recurring revenue in under 12 months and are completely redefining the industry the product sits within. Stack Java, Python, JavaScript 5-days a week in person, London Software Engineers that are building/want to build 0-1... let's chat. More ❯

innovation, helping R&D teams and Creators to invent, protect, and monetise ideas faster with AI at the heart of it (LLMs & Agentic AI). We're growing the engineering team that will be working shoulder to shoulder with some impressive co-founders. If you're comfortable with real autonomy and ownership, building fast, and solving problems end-to … seven figure recurring revenue in under 12 months and are completely redefining the industry the product sits within. Stack Java, Python, JavaScript 5-days a week in person, London Software Engineers that are building/want to build 0-1... let's chat. More ❯

of Europe's automotive market's biggest innovator, changing the way customers buy their next car? Our client is currently recruiting a Backend Developer - Python to join their talented engineering team, building highly scalable backend services that power exceptional customer experiences. This is a role where your technical expertise will directly shape the future of automotive retail. The ideal More ❯

simplify access to stable, secure digital finance, enabling users to save, transact, and grow their money with confidence. We’re looking for x8 Java Developers to join their core engineering team. You’ll help design and build backend systems that power real-time financial operations, from transaction processing to user authentication and fund management. The work is greenfield, the More ❯

the mobile roadmap & architecture (Flutter, Swift, Java) Lead from a technical perspective: design, code, review, and mentor Integrate with complex third-party SDKs (BLE, mobile access, indoor wayfinding) Drive engineering excellence in testing, performance, monitoring, and CI/CD Collaborate closely with back-end and product teams to deliver new features What we’re looking for: 3+ years of More ❯

the mobile roadmap & architecture (Flutter, Swift, Java) Lead from a technical perspective: design, code, review, and mentor Integrate with complex third-party SDKs (BLE, mobile access, indoor wayfinding) Drive engineering excellence in testing, performance, monitoring, and CI/CD Collaborate closely with back-end and product teams to deliver new features What we’re looking for: 3+ years of More ❯

A. An AI company with paying customers - 30% month-over-month growth and $1M in revenue. Working on AI to empower people, not replace them. Savvy founders and sublime engineering culture. Sounds like they have it under control. Why do they need you? They are currently onboarding four to five new large/enterprise customers monthly. That comes with More ❯

A. An AI company with paying customers - 30% month-over-month growth and $1M in revenue. Working on AI to empower people, not replace them. Savvy founders and sublime engineering culture. Sounds like they have it under control. Why do they need you? They are currently onboarding four to five new large/enterprise customers monthly. That comes with More ❯

and editing data directly in the database Collaborate closely with the CEO and other Full Stack Engineers on high-impact projects Technical Requirements 2–3 years of back-end engineering experience, ideally in a startup environment Strong knowledge of Python and Flask Proficiency with SQL and Postgres Experience with AWS services (migration experience is a plus) Ideal Candidate Quality More ❯

and editing data directly in the database Collaborate closely with the CEO and other Full Stack Engineers on high-impact projects Technical Requirements 2–3 years of back-end engineering experience, ideally in a startup environment Strong knowledge of Python and Flask Proficiency with SQL and Postgres Experience with AWS services (migration experience is a plus) Ideal Candidate Quality More ❯

Location : Central London (On-site). About the Role: As a Senior .NET Developer, you’ll play a key role in designing, developing, and maintaining software applications. You’ll collaborate closely with cross-functional teams to translate user needs into technical solutions that are robust and user-friendly. Key Responsibilities: Translate user requirements into effective technical solutions Develop and More ❯

Location : Central London (On-site). About the Role: As a Senior .NET Developer, you’ll play a key role in designing, developing, and maintaining software applications. You’ll collaborate closely with cross-functional teams to translate user needs into technical solutions that are robust and user-friendly. Key Responsibilities: Translate user requirements into effective technical solutions Develop and More ❯

November Contract Length: 4 months (with potential extension) Interviewing Now – Fast Process A newly acquired tech-driven business in the claims management space is looking for two experienced contract Software Engineers to join a growing agile development team. The company is investing heavily in its roadmap and platform evolution, and this is a great opportunity to contribute to meaningful More ❯

billion-dollar businesses. The company’s trajectory is ambitious, from zero to seven figures in recurring revenue within its first year and this is only the beginning. As a Software Engineer, you’ll join a small, high calibre team where ownership is everything. You’ll work primarily on the backend, integrating with LLMs, and collaborating directly with the founders … s nothing quite like building the next tech unicorn, together, in the same room, ask the big players. What you’ll need to succeed: Strong experience building production quality software (Java, TypeScript, or Python) Curiosity and adaptabilit y: you learn new technologies quickly and apply them effectively Hunger and drive: you’re comfortable working in ambiguous, fast paced environments More ❯