1 to 25 of 55 Permanent Senior Software Engineer Jobs in London

SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW PERMANENT JOB OPPORTUNITY AVAILABLE WITHIN A GLOBALLY LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Permanent job opportunity for a Senior Software Engineer Globally leading defence/cyber security company Salary … plus clearance bonus London based organisation in an easily accessible location Permanent Software Engineer To apply please call/or email WHO WE ARE? We are recruiting Senior and Lead Software Engineers to work with a multi-national, industry leading National Security client in central London. ...

Senior Software Engineer C++ (Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) ***This is a hybrid role, 2 days remote and 3 days in the office*** Our client actively encourages diversity, equality and inclusion within its workforce and welcomes applications from a diverse background … Solutions Limited does not discriminate in regards to age, gender, national origin, religion or any other basis. An excellent opportunity has arisen for a Senior Software Engineer C++to join a friendly team my client are a well-established exchange (FinTech, Financial Technology) based in the City. ...

Senior Java Software Engineer - Java Developer, Python, AWS, MySQL, NoSql, REST APIs, Microservices, Machine Learning, Artificial intelligence (Hybrid - 3 days a week in the office - Notting Hill) Description for the Senior Java Software Engineer role:- You will be joining a fast-growing, research-driven … learning techniques. My client is revolutionising their industry with a track record of building things that others have ruled out as impossible. The Java Software engineer will join a very bright, talented team of engineers with the guidance of technologists who have help build up some ...

Senior Software Engineer/Principal Software Engineer- C++, Python - Financial/Banking. Candidates will have a minimum 8+ years C++ experience and excellent knowledge of Python -coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity. … 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 ...

Senior Software Engineer Salary: Negotiable (Depending on Experience) Location: North London Area Schedule: 3-days on site and 2-days WFH per week The Opportunity We are supporting a globally recognised engineering business at the forefront of advanced radar and surveillance technology in the search … Senior Software Engineer. This is an excellent opportunity to play a key role in the development of innovative, high-performance software solutions used within cutting-edge maritime navigation and defence systems. You will take ownership of software design across the full lifecycle, contributing to both ...

Senior Software Engineer (Python) Hybrid London (2 days/week) Up to £100,000 + Benefits We're hiring a Senior Software Engineer to play a key role in building and scaling a high-impact ad-fraud prevention platform used globally. This … senior IC role for engineers who enjoy ownership, solving complex problems, and setting a high bar for engineering quality. What you'll do: Lead delivery of complex, cross-service features Make pragmatic architecture and design decisions Own services end-to-end, including performance, reliability, and incident response Set standards ...

Senior Software Engineer (Backend)London - Hybrid (3 days in office) Up to £85k + benefits What if the systems you built were used every day by millions of readers around the world? A long-established, AI-driven technology business is hiring a Senior Software Engineer … machine-learning-led products that operate at scale, helping publishers make smarter decisions around content, engagement, and audience growth. This is a hands-on senior role within a strong London-based engineering team, focused on backend systems at the core of the platform. The role Build and evolve backend ...

Senior Software Engineer - Rust (Any Backend Language Accepted) Fastest Growing Start-up in the UK | Defense | Senior Software Engineer | Rust We are partnered with one of the UK's fastest-growing start-ups. They are a very technically focused group building cutting-edge decision … just over two years, and already have a lot of customers in the UK. On-site | London Up to 150,000 + Equity Senior/Principal Software Engineers: They're looking to add Senior/Principal Engineers to their team. The team are open to hiring pure ...

Senior Software Engineer (DevOps) — Remote £70,000 – £75,000 per annum (UK) | Equivalent ranges available for other countries No sponsorship offered Our client writes code that actually changes lives. Not in a "we disrupted the lunch ordering space" kind of way. We mean genuinely changes lives — restoring … people worldwide are losing their vision unnecessarily, and this award-winning team is on a mission to fix that. They're looking for a Senior Software Engineer to join them. So what will you actually be doing? You'll be joining a tight-knit, senior engineering ...

Senior Software Engineer - SC Cleared Location: London Salary: Up to £80,000 Clearance: Active SC Clearance and eligibility for DV To apply, email : Overview A leading organisation delivering operational cyber capabilities is looking for a Senior Software Engineer to join its growing technical team … highly secure, mission-critical projects supporting cyber operations in a fast-paced environment. The successful candidate will be responsible for designing, building, and maintaining software solutions used within operational cyber programmes, working closely with engineers, analysts, and technical stakeholders. Key Responsibilities Design, develop, and maintain software applications using ...

Title: Senior Software Engineer Job Type: Permanent Location: London, UK (Hybrid 3 days/week onsite) About the Role We're looking for a Senior Software Engineer to join an embedded delivery team supporting client's technology and product teams as a senior technical lead within an agile environment. What You'll Do Design, build, and maintain scalable, production-grade software across web, API, and data layers Own technical delivery end-to-end from requirements gathering through to deployment and ongoing support Integrate AI and automation capabilities into existing ...

Title : Senior Software Engineer (Compilers) Company : HPC & AI Location : London (primarily remote) Compensation : Up to £190,000 Company : An advanced HPC R&D firm, looking to expand the UK compiler team. Most of the team are ex-Big-Tech, ex-FAANG or ex-Chip firms. They joined … technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring. Role : Senior Software Engineer position with an emphasis on AI Compiler development. You will be a significant hire and will own much ...

Title : Senior Software Engineer (GPU Drivers) Company : AI Acceleration Location : London (very flexible WFH) Pay : Up to £160,000 + bonus and benefits Company : An advanced HPC R&D firm, looking to expand their GPU Driver team. Most of the team are ex-Big-Tech, ex-FAANG … technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring. Role : Senior Software Engineer position. You will be a significant hire spearheading much of their 2025 development. Much of the team will be built ...

## Principal AI Software Engineer, Senior Vice PresidentApplyremote type: Hybridlocations: London United Kingdomtime type: Full timeposted on: Posted Todaytime left to apply: End Date: May 25, 2026 (13 days left to apply)job requisition id: 26960138Are you looking for a career move that will … heart of a global financial institution? We are seeking an exceptionally skilled Principal AI Software Engineer to architect and implement robust, scalable backend systems that power our advanced AI tools and services. This hands-on individual contributor role demands expert knowledge of Python fundamentals, a profound understanding ...

Senior Software Engineer – AI/Agentic Systems London (Hybrid) We’re partnering with a cutting-edge AI startup redefining how intelligent systems operate at scale. Their mission is ambitious: to push the boundaries of agentic AI and build platforms that automate complex, multi-step human workflows—unlocking … alongside world-class AI talent, and directly shape a platform sitting at the intersection of research and real-world deployment. The Opportunity As a Senior Software Engineer , you’ll play a key role in building and scaling an enterprise-grade AI platform. You’ll operate ...

Senior Software Engineer. Java/Spring/Full stack (Fully Remote) Location: Fully Remote Salary: £50,000 to £60,000 plus strong wider benefits package About the role Our client, a digital consultancy delivering into central government, are looking for a Senior Software Engineer … quality code in a live delivery environment Support engineering standards and ensure deliverables meet agreed quality expectations Skills and experience Strong experience as a Software Engineer in a hands on delivery role Good experience across Java, JavaScript, Spring and AWS Background delivering in a full stack engineering environment ...

Senior Software Engineer. Java/Spring/Full stack (Fully Remote) Location: Fully Remote Salary: £50,000 to £60,000 plus strong wider benefits package About the role Our client, a digital consultancy delivering into central government, are looking for a Senior Software Engineer … quality code in a live delivery environment Support engineering standards and ensure deliverables meet agreed quality expectations Skills and experience Strong experience as a Software Engineer in a hands on delivery role Good experience across Java, JavaScript, Spring and AWS Background delivering in a full stack engineering environment ...

Ready to safeguard tomorrow's critical infrastructure? This Senior Solutions Software Engineer opportunity combines cutting-edge cybersecurity innovation with real-world impact. Step into the forefront of mission-critical technology where your embedded systems expertise will protect everything from power grids to healthcare devices. Join a rapidly … spanning four countries and ambitious growth plans, they're seeking exceptional talent to join their elite engineering team. The Role at a Glance As Senior Solutions Software Engineer, you'll architect and develop secure, resilient systems that protect the world's most critical infrastructure. Working directly with ...

Have you built low-latency, high-performance systems and want to work at the cutting edge of crypto trading infrastructure? Senior Software Engineer (C++) - Crypto Trading Salary: up to £185k + bonus + RSUs Location: Fully Remote We are delighted to be continuing our partnership with … APIs, all within a low-latency, high-throughput environment serving millions of users and institutions worldwide. They are looking for the following experience in Senior Software Engineers: Strong C++ development (5+ years) Low latency, high-performance systems Highly concurrent/distributed systems (Linux environment) Experience within trading, financial ...

Senior Full Stack Software Engineer (TypeScript/JavaScript, Node.js, React, and Next.js) London £90,000 - £100,000 + benefits We're looking for a product led, Senior Software Engineer who can be the generalist in the team, bridge front and back, solve complex issues ...

Senior Software Engineer | ~£950/day Outside IR35 | 6-months initial contract | London Industry: Trading Location: London Job Type: Contract - 6-month initial Our client is building the next generation of execution and order management (EMS/OMS) infrastructure for global commodities trading. You will join … trading platform from the ground up, tightly integrated with risk, pricing, and market data systems to support high-performance trading environments. This is a senior, hands-on role for an engineer who wants end-to-end ownership — from low-level protocol integration through to distributed execution services ...

Senior Software Engineer with a backend/infra focus Industry: Prop-tech Stack: TypeScript, Node.js, NestJS, React, Next.js, PostgreSQL, MongoDB, Docker Office: London (hybrid) Salary: Up to £100k This is a chance to join a large private equity firm with investments in properly across Europe (and further … . For too long they've been reliant on utilising SaaS solutions to manage their portfolio. Now they're building the software internally, with a plan to grow and build as a standalone company. The engineering team sits at the intersection of real estate, investment, and product - building ...

SENIOR SOFTWARE ENGINEER £80,000 - £85,000 + 10% BONUS LONDON This is an exciting opportunity to join a global media organisation where engineering plays a central role in supporting digital advertising across nationwide platforms. THE COMPANY Our client is a privately owned, global organisation operating across ...

Senior Software Engineer (Backend) Series A | eCommerce x Fintech | Meaningful equity Buying clothes online still isn’t a great experience. Sizing is inconsistent, returns are costly, and customers are often left guessing. Yet despite all the innovation in eCommerce, this problem remains largely unsolved. We’re working … here is the chance to build something that matters, in a team where your contribution is visible from day one. If you’re an engineer who enjoys building real products, solving meaningful problems, and working in an environment where ownership and impact matter more than process, this is worth ...

About The Role 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. We value adaptability over specific technology expertise. While we are technology-agnostic and expect you to be too, we will fully support your development with the necessary training to master ...