Lead Software Engineer Python Java Jobs in London, UK

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Mid level Software Engineer — Graphics & Platform

Who we are, what we doSensat is a geospatial AI business that powers advanced and highly functional digital twins for the world's most critical infrastructure projects. We partner with the world's largest construction, engineering and critical infrastructure companies, including Na ...

AIML Software Engineer, AI for Science

Description , as this will not be available post closure of the advert. When applying for this role, please use the ‘cover letter’ of the online application or your CV to describe how you meet the competencies for this role, as outlined in the job requirements above. The information ...

Software Development Engineer II ML Platform

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success.Why Join Us?</b ...

Software Engineer (Polkadot Runtime) Full time

People in our collective are: Highly motivated to contribute to Parity’s mission and be part of something bigger Excited to work on projects that are groundbreaking and complex Autonomous workers that self-initiate, but also collaborate well with others <li ...

Senior Algo Trading Software Engineer (VP)

Discover your future at CitiWorking at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.Job O ...

Tech Accelerate Graduate Program Software Engineer

About the Role The Risk Solutions Technology Graduate Program is a 12-month experience with two six-month rotations. Participants gain hands-on experience in big data, AI, SRE, DevOps, and security engineering. They also get exposure to leading cloud platforms like AWS and Azure. The program focuses on ...

Software Engineer, Reporting – London or NYC

Exciting opportunity at one of the fastest growing financial services firms around the world. They offer prime brokerage, clearing and financing across traditional and digital assets, and are now looking to hire world-class software engineers to help build on their success.Responsibilities < ...

Principal Software Engineer Hybrid Datafeed Server

Responsibilities :Develop, test, and deploy software and services to end users.Design and implement user-friendly APIs that deliver streaming real-time market data.Participate in and contribute to design reviews, code reviews, and brainstorming sessions.Communicate and colla ...

Software Engineer II (Magnolia/ContentStack FullStack)

MOO set out to shake up the world of print back in 2006. And we’ve come a long way since. Today we’re a 400 + strong team (we’re thinking of getting matching jackets) who create print and digital products for companies of all sizes – from Google and AirBnB to the guy who makes those amazing prints you found at a ...

Principal Software Engineer 3 month contract

We use our expertise and products to craft customer experiences. Our range of services helps global brand acquire, engage and retain choice-rich customers.© 2023 Collinson International Limited. Registered in England & Wales under registration No. 2577557Registered address : 3 More London Riverside ...

Senior Software Engineer UK Money Movement

Company Description Wise is one of the fastest growing companies in Europe and we’re on a mission: to make money without borders the new normal. We’ve got over 15 million customers across the globe and we’re growing. Fast. Current banking systems don't let us send, spend or ...

Cybersecurity (Secure Software/Cloud Integration) Engineer

Responsibilities Embed security practices into software development pipelines by integrating DevSecOps principles, automation tools, and governance controls. Support the definition, implementation, and continuous improvement of secure software development lifecycle (SSDLC) processes across in ...

Senior Software Engineer, Full Stack AI

Senior Software Engineer, Full Stack - AIFitch Group is currently seeking a Senior Software Engineer, Full Stack-AI based out of our London or Manchester office. Fitch Group Technology has a number of agile teams that deliver world-class innovative solutions to Fitch Group inte ...

Mid Senior Full Stack Software Engineer

DescriptionAt Stint, we’re using AI tools to transform how hospitality businesses operate. We started by building the UK’s largest flexible workforce of hyper-local students available for short 2–3 hour shifts, working with brands like Pizz ...

Staff Software Engineer (Optimizely Analytics, Backend)

At Optimizely, we're on a mission to help people unlock their digital potential. We do that by reinventing how marketing and product teams work to create and optimize digital experiences across all channels. With Optimizely One, our industry-first operating system for marketers, we offer teams flexibility and ...

C++ Software Engineer – Core Dev Simulation

Salary: up to £200k base + bonusSummaryLeading global HFT firm is looking for a pragmatic C++ Engineer to join the Core Development team. Despite serving as the hub for managing the substantial operations across the UK, Europe and the Middle East, the London office retains ...

Backend Software Engineer C++ Windows Finance

Backend Software Engineer / Developer (Windows C / C++, C#) London to £75k FTCAre you a skilled Backend Software Engineer with strong C++ skills?You could be progressing your career in a senior, hands-on role at a global market data provider.As a Backend Software Engineer you will ...

Software Engineer II (Forge Post Purchase)

MOO set out to shake up the world of print back in 2006. And we’ve come a long way since. Today we’re a 400 + strong team (we’re thinking of getting matching jackets) who create print and digital products for companies of all sizes – from Google and AirBnB to the guy who makes those amazing prints you found at a ...

Software Engineer III (C#.NET / Angular)

Software Engineer III- (C# .NET / Angular) Are you ready for the next step in your engineering career? Would you enjoy working on our cutting-edge products?About Our Team:We are strengthening our software engineering team to modernise our existin ...

Software Engineer Cross platform C++ Multipass

Use your deep C++ skills on Windows and MacOS to build an amazing open source developer experience with , the workstation mini-cloud at your fingertips which provides Ubuntu and appliance VMs on demand for build, test and prototyping. The Multipass team is hiring a Software Engineer to join our distributed te ...

Software Engineer, Macro Quant Analytics Technology

What you ’ll doDesign, build, and extend core C# analytics services, APIs, and libraries used across the Macro business.Develop and operate high-performance distributed systems with strong guarantees around correctness, latency, and scalability.Build real-time and historical analytics services s ...

Senior Software Engineer TV Playback (C++)

We design Spotify’s consumer experience—end to end, moment to moment, across every screen, platform, and partner integration. Our mission is to make listening feel effortless, personal, and joyful for billions of users around the world. That means turning complexity into clarity across hundreds of touchpoints—fr ...

Software Engineer (SDK Node) Full time

As Rust Core Developer you will: Work with a highly motivated team of rust and backend experts from all over the world. Discuss new features, designs and issues with your team and the community on GitHub. Think about bleeding edge problems that require innovative solutio ...

Senior Software Engineer, C/FICCO Data

Senior Software Engineer, C/FICCO DataJob LocationLondonEmployment typeRegularDepartmentTechnologyTargeted Start DateImmediateDRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets ...

Manager Senior Software Engineer (AI Projects)

Manager - Senior Software Engineer (AI Projects) Employer Location London, United Kingdom Salary Competitive Closing date 13 Jun 2026 View more categoriesView less categories Sector Salary band Contract type Hours Where will they be working You need to or to save a job. Job Details< ...

Software Engineer C#.Net Sports Trading

Software Engineer / Developer (C# .Net) London onsite to £90kAre you an experienced C#, backend focussed Software Engineer?You could be progressing your career in a hands-on, backend focussed Software Engineer role at a global sports trading firm, earning substantial bonuses.Wha ...

Software Engineer C#.Net Azure SaaS

Software Engineer / Developer (C# .Net Azure) Richmond / WFH to £65kAre you a Microsoft technologist looking for a role where you can make an impact and progress your career?You could be joining a well funded tech start-up, with recent £35 million investment, as they scale.As a Sof ...

Software Engineer III AI Chase UK

At JP Morgan Chase, we understand that customers seek exceptional value and a seamless experience from a trusted financial institution. That's why we launched Chase UK to transform digital banking with intuitive and enjoyable customer journeys. With a strong foundation of trust established by millions of cust ...

Software Engineer C#.Net AWS Finance

Software Engineer / Developer (C# .Net AWS) London / WFH to £80kAre you a Software Engineer with finance experience?You could be progressing your career at a boutique Asset Manager that specialise in Fixed Income markets and have multi-billion dollars under management.What's in ...

Low Latency E Trading Software Engineer

Discover your future at CitiWorking at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.Job O ...

Senior Software Engineer Production Platform Foundations

Job Summary: About the Role & TeamA Senior Software Engineer on the Production Platform Foundations team is a security-focused cloud engineer responsible for designing, building, and supporting automation and tooling initiatives that further enable secure, compliant, self-se ...

Principal Software Engineer | Upto $150/hr

About the job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo</st ...

Senior Software Engineer | Upto $70/hr

About the job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo</st ...

Software Engineer, Backend AI Practice Team

ABS is seeking an exceptional Backend Engineer to join us full-time on our Artificial Intelligence (AI) Practice Team. In this role, you will design and scale high-performance backend systems that power real-time analytics and retrieval-augmented generation (RAG) pipelines. You’ll build distributed services t ...

Contract Software Engineer Payroll Platform (London)

Software Engineer Payroll London, United Kingdom Posted 9 months ago Technical Skills Ability to debug and resolve issues autonomously Product and customer focused mindset Experience with Python, Django, and React are a plus Ripp ...

DevOps Software Engineer Threat Intelligence, SEAR

Summary Posted: 21 Apr 2026. Role Number: . As part of Apple's Security Engineering & Architecture (SEAR) organization, you'll join our mission to create the world's most secure products. We are committed to building groundbreaking tools that empower our threat intelligence ana ...

Hybrid Principal Software Engineer & Tech Leader

8th Light is seeking a Principal Engineer in London to lead AI integration and technical strategy. You will collaborate with clients, guide technical direction, and mentor teams to ensure high-quality software solutions. Ideal candidates will have 10+ years of experience in consulting, a solid technical backgrou ...

DV Cleared Software Engineer Defence & Security

Fortice is seeking an eDV Software Engineer at the Mid-Lead Level for roles in London, Gloucester, or Manchester with hybrid options available. This position is central to national security, involving the design and maintenance of secure software systems, collaboration with multidisciplinary teams, and engagemen ...

Software Engineer Healthtech AI Platform (Equity)

Jack & Jill is seeking a Software Engineer to join their high-growth healthtech startup. You will manage the core architecture and develop secure infrastructure, using TypeScript and NextJS, while directly impacting healthcare compliance solutions. This role offers a rare early-hire opportunity with si ...

Software engineer payroll in London Rippling

Software Engineer Payroll London, United Kingdom Posted 9 months ago Technical Skills Ability to debug and resolve issues autonomously Product and customer focused mindset Experience with Python, Django, and React are a plus Ripp ...

Graduate Software Engineer AI Driven Impact

Evernote is seeking a talented individual to join their vibrant team in London. In this role, you'll have the opportunity to build impactful systems used by millions and integrate powerful AI tools into your development workflow. Ideal candidates are ambitious problem-solvers who thrive in collaborativ ...

Senior Integration & Software Engineer (D365 + Azure)

Bauer Media Outdoor UK is seeking a Lead Specialist – Integration and Software Engineer to deliver high-quality integrations and software solutions across our back office ecosystem. This senior role involves owning technical delivery and contributing to broader platform health. The ideal candidate will ...

eDV Fullstack Software Engineer National Security

eDV Full Stack Software Engineer – National Security Join a growing team delivering mission-critical technology solutions that help keep the UK safe, secure and resilient. Working across National Security, Defence and Intelligence, partnering with customers to solve complex technical challe ...

Forward Deployed Applications Software Engineer London

Forward Deployed Applications - Software Engineer London About us PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software. We are building an AI-driven simulation software sta ...

Platform Software Engineer Platform Remote, UK

Ground Truth Labs GTL is a well‑funded, early‑stage startup developing state‑of‑the‑art digital technologies to better understand, diagnose and treat blood cancer patients. We have built an exceptional, small‑by‑design, interdisciplinary team to translate leading academic research into re ...

Software Engineer Infrastructure,SWE Developer Foundations

Summary The SWE Developer Foundations organisation builds technologies and tools to help software engineers at Apple to do the best work of their lives. Our team supports that mission by building innovative infrastructure and tools to provide engineers with capabilities to quickly and efficiently ...

Senior Fullstack Software Engineer, Signals Team

**Join us at Entrust ** At Entrust, we’re shaping the future of identity centric security solutions. From our comprehensive portfolio of solutions to our flexible, global workplace, we empower careers, foster collaboration, and build solutions that help keep the world moving safely. <b ...

Senior Software Engineer Foodtech Start up

Senior Software Engineer - Foodtech Start-up London Hybrid- 2 days in office (3 can be remote in UK) £60-70k + equity This job opportuinity is workin for one of the most exciting early-stage foodtech startups in London right ...

Senior Software Engineer, Fullstack (Consumer Payments)

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.As part of the Consumer Payments team at Affirm, you'll be working on Affirm's Payment Processing Network. These systems currently ...

Senior Software Engineer (AI Native Development)

Senior Software Engineer (AI-Native Development)At Benivo, we believe the next generation of strong software engineers will combine deep engineering judgment with the ability to orchestrate AI agents to design, implement, test, and ship software faster.We are hiring a Senior Software Engineer ...

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