Software Developer Pythonreact Jobs in London, UK

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Senior DevOps Architect — .NET, Kubernetes & Telemetry

A technology-driven sports data company is seeking a Principal Software Engineer with a DevOps mindset for a hands-on leadership role. You'll shape the technical vision and engineering practices while leading the migration from .NET Framework to modern containerized services. This role involves optimizing perfor ...

Lead Frontend Engineer — Scalable, High Performance UIs

A leading travel technology firm seeks a Lead Software Engineer to drive the evolution of front-end systems and lead projects that serve millions of travelers. The ideal candidate will have over 12 years of software development experience, with proven expertise in client-side technologies such as JavaScript, Typ ...

Senior UI Engineer (React) – Frontend Tech Lead

A leading financial services firm based in Greater London seeks a Senior Software Engineer to enhance and deliver trusted technology products. You will join an agile team, focusing on system design and application development. With at least 5 years of applied experience, the ideal candidate will have advanced kn ...

Senior UI Engineer (React) – Frontend Tech Lead

A leading financial services firm is seeking a Senior Software Engineer to join their Equities Sales and Trading Technology team. This role requires an individual who can apply deep technical expertise and problem-solving skills to complex challenges across multiple technologies. Ideal candidates will have over ...

Remote Full Stack Engineer II (Python) — Build Data Tools

A leading market intelligence firm in Greater London is seeking a Full Stack Software Engineer to develop and maintain internal tools that streamline insights delivery. You will collaborate with technical consultants, design intuitive user interfaces, and implement backend services interacting with data platform ...

Platform Engineer: Kubernetes & ML Platform

A biotech company in London is seeking a Software Engineer to join its Platform Team. This mid-senior level role involves developing and managing Kubernetes-based applications and enhancing CI/CD pipelines to support machine learning projects. Candidates should have at least 3 years of experience in software eng ...

Senior Lead React UI Engineer – Trader Risk Platform

J.P. MORGAN is seeking a Senior Lead Software Engineer to enhance market-leading technology solutions within the Equities Derivatives and Risk Technology team. This role involves designing trader-facing applications in React, mentoring team members, and driving innovation. Key qualifications include ad ...

QA Engineer TypeScript Test Automation & API/React

Java Script Works in Greater London is seeking a skilled Software Tester to design, execute, and document test cases. Candidates should have extensive experience in TypeScript coding for testing purposes and a strong understanding of software testing concepts. The role involves collaboration with cross ...

Go Backend Engineer – Trading Connectivity

Talos Global in Greater London is seeking a Software Engineer for their Trading Connectivity team. This role involves designing and maintaining high-performance backend systems and collaborating with various stakeholders to enhance the Talos platform. The ideal candidate should have 2-5 years of softwa ...

Senior ML Engineer Fraud & Identity Platforms

LexisNexis Risk Solutions in Greater London is seeking experienced software engineers to build and deploy ML-powered services for fraud and identity analytics. The role emphasizes developing APIs and microservices while ensuring strong security standards. Candidates should have 4+ years in software eng ...

Senior FIX Analyst: Trading Systems & Integrations Lead

Charles River Development is seeking a Senior FIX Analyst based in Greater London, United Kingdom. The role involves managing complex FIX implementations, diagnosing software issues, and providing training related to the software. Applicants should have a four-year degree in a technical field, seven ye ...

Impactful Solutions Strategist for Critical Industries

Cogna is seeking a Solutions Strategist in Greater London to engage directly with clients and define software solutions that address their challenges. The role requires a blend of analytical skills, technical expertise, and client interaction. The ideal candidate will hold a relevant degree, have prove ...

Senior Frontend Lead UI Architect for Fintech UX

0026 Checkout Technology Ltd is searching for a Senior Software Engineer – Frontend Lead to oversee the UI implementation of their products. The successful candidate will collaborate with various teams to ensure high-quality deliverables while leading project priorities. The ideal candidate boasts comp ...

Remote Tech Lead FinTech Cloud & Microservices Architect

Eggs Invest seeks a Technical Lead to manage technical strategy and software development. This full-time role is based in the London Area, with flexibility for remote work. You will mentor team members, architect scalable solutions, and coordinate with stakeholders to deliver high-quality outcomes. Ide ...

Senior Java Engineer – AI‑Driven Cloud Platform, Equity

Behavox Limited. is seeking a Senior Software Engineer (Java) to drive technical direction across core product domains in London. The role focuses on AI-assisted engineering and the design of complex systems, requiring strong expertise in Java and cloud-native architectures. The ideal candidate will le ...

FX Payments Tech Lead — Java & Microservices

A global financial services firm is looking for a Lead Software Engineer in Wholesale Payments to design and deliver secure, scalable technology products. This role involves executing software solutions, leading technical initiatives, and working collaboratively with cross-functional teams. The ideal candidate w ...

VP Lead Java Engineer, Equities Derivatives Platform

A leading financial services firm in Greater London is looking for a Lead Software Engineer for the Equity Derivatives Group. This role involves developing innovative software solutions and collaborating with a global team of engineers, traders, and product owners. Ideal candidates have a strong background in Ja ...

Technical Lead Shape Digital Transformations & Lead Teams

A leading consultancy firm in Greater London seeks a skilled software engineering leader to manage cross-functional teams and drive successful digital transformations for clients. This role requires expertise in the software delivery lifecycle, team management, and proven abilities in client interactions. You wi ...

Senior Modelling Engineer — Scalable Training Platform

A leading training platform for runners in London seeks a Software Engineer to enhance their app by building and improving training features. Applicants should have 3+ years in software engineering, proficiency in Python, and strong algorithm design skills. The role involves collaboration across teams and requir ...

Regional GovTech Strategist for Local Government

A leading software company is seeking a Regional Account Director in Greater London to build strategic partnerships with local authorities. The ideal candidate will have deep knowledge of Local Government, excellent commercial acumen, and experience in navigating complex sales cycles. Responsibilities include de ...

Senior Frontend Engineer, Foundry UI & Data Workflows

A leading technology company in Greater London is looking for a Senior Front End Software Engineer to develop sophisticated applications on the Palantir Foundry platform. This role involves architecting and developing user interfaces and tools that empower thousands of users. The ideal candidate will have over 4 ...

Senior Frontend Engineer — Real Time ML UI & Performance

A tech-driven trading firm in London is seeking a Frontend Software Engineer with over 5 years of experience in React development. The role involves working on UI projects for machine learning pipelines and building scalable software solutions. This position offers a hybrid work model with an emphasis on collabo ...

Codex Platform Engineer: Ecosystem & Enterprise

A leading AI research company in London seeks a talented individual to enhance Codex into a production-grade AI software teammate. The role involves collaborating with diverse organizations to deploy and trust Codex in demanding environments. Responsibilities include shaping product evolution, building core ecos ...

Staff Engineer, Traffic Management & DNS Systems

A global tech company based in London is seeking a Staff Software Engineer in Traffic Management Systems. The role involves technical leadership in building scalable and high-performance applications, mentoring engineers, and collaborating across teams. Ideal candidates will have over 7 years of experience in so ...

Hybrid Full Stack Engineer — Fitness Tech with Impact

A leading fitness technology company in London is looking for a Full Stack Software Engineer to create groundbreaking fitness applications. The ideal candidate will have strong experience in AI-assisted software development, a range of full stack technologies, and excellent communication skills. The role offers ...

Senior Python Engineer, Financial Systems & Data Pipelines

A financial risk management firm in the UK seeks a Python Software Engineer to join the Client Success Team. The role involves leading the delivery of features and enhancements for the Validus Horizon platform. Candidates should have 3-5 years of software development experience, strong skills in Python, and a ba ...

Remote C# Desktop Engineer (WPF)

A remote tech company is seeking a Software Engineer to enhance and build functionalities in their C# desktop apps for their innovative product, Camo. The role demands a strong grasp of C# and WPF, along with a collaborative team environment focused on producing high-quality software. Benefits include a competit ...

Senior Full Stack Engineer

We're looking for experienced Senior Software Engineers! TL;DR: Our tech stack is Elixir, Elm, and Rust. We are a rapidly growing company (100% YoY since launch). We work remotely and asynchronously in four-week cycles using the Shape Up methodology. About Timeline: We are disrupting the financial ...

Senior B2B SaaS Fintech Sales Exec | Hybrid + Stock Options

A leading fintech company in Greater London is seeking a Senior Sales Executive to sell their innovative software platform. The ideal candidate will have 7-10 years of B2B sales experience, particularly in enterprise software, and a proven track record of closing significant deals. With a hybrid working model, t ...

Senior Lead SDN Engineer, VPC Networking

A global financial services leader is looking for a Senior Lead Software Engineer to enhance and deliver innovative networking technology products. The role involves designing core components for a software-defined networking platform and collaborating with various teams to ensure technical excellence. Ideal can ...

Hospitality Tech Implementation Lead

A workforce management software company is seeking a Workforce Performance Consultant to lead software implementations at client sites. The ideal candidate will have over 4 years of experience in hotel operations and strong communication skills. Responsibilities include providing client training, conducting acco ...

Senior Full Stack Engineer — Remote Growth Engineer

A fast-growing cybersecurity training platform is seeking a Senior Full Stack Engineer to develop features for millions of learners. This role involves maintaining existing code and collaborating with a cross-functional team. Responsibilities include designing reliable software solutions, mentoring developers, a ...

Platform Operations Engineer: Observability & FinOps (Hybrid)

A deep-tech company in London is seeking a Senior Platform Engineer to enhance their AI-driven simulation software capabilities. The role involves managing the observability stack, driving FinOps practices, and implementing security policies across cloud providers. The ideal candidate should have significant Dev ...

Senior Lead React Engineer – Frontend for Trading Tech

A leading global financial services firm in London seeks a Senior Lead Software Engineer to join an agile team focused on enhancing and delivering top-notch technology products. The successful candidate will have 5+ years of experience, excel in software engineering concepts, and bring practical cloud-native exp ...

Senior Python Engineer: Backend Architect & Mentor

A technology company in London is seeking a Senior Software Engineer to join its engineering team. The role requires deep expertise in Python, with responsibilities including designing scalable applications, leading software development projects, and mentoring junior engineers. The ideal candidate will have 6-11 ...

Enterprise Account Executive, UK & Northern Europe

A leading global recruitment software company, based in London, seeks an experienced Enterprise Account Executive to drive new business acquisition. The role emphasizes building relationships with key stakeholders and securing enterprise-level deals across multiple sectors. Candidates should have at least 5 year ...

ERP Implementation Consultant — Client Success

A global software solutions provider is seeking a Consultant in London to manage ERP deployments and provide client training and consulting services. The ideal candidate has over 5 years of consulting experience in software or business processes, with strong project management skills and the ability to influence ...

Integrations Engineer — Agentic AI & CRM Apps

A leading customer communications platform in Greater London is seeking a Software Engineer to contribute to key native integrations and work with teams to enhance customer experiences. This hybrid role requires 3+ years of experience in software engineering, proficiency in Python or JavaScript, and familiarity ...

Cloud Image Engineer Ubuntu Linux & CI Automation

A leading open source software company in Greater London is seeking a Software Engineer to work on cloud infrastructure and automation. The role involves building and maintaining robust delivery pipelines for Ubuntu, collaborating closely with partners including Amazon and Microsoft, and contributing to the open ...

Java Engineer: Cloud, Microservices & Fintech

A prominent software firm in Greater London is seeking Java developers at all levels to work on innovative projects for tier-1 investment banks. This is a hybrid role, merging remote work with on-site collaboration, allowing developers to improve existing systems while employing modern software engineering pract ...

Senior Full Stack AI Engineer (Hybrid—London)

The Python Software Foundation is seeking a Senior Full Stack Software Engineer to enhance research and foundation model development. This role, based in London with a hybrid working model, involves developing full stack applications while collaborating with research scientists and ML engineers. Candidates shoul ...

Principal Vulnerability Engineer LLM Powered Research & Tools

watchTowr is seeking a Principal Vulnerability Engineer in the Greater London area to engage in hands-on vulnerability research and software engineering. You will lead security efforts on critical vulnerabilities, build production-quality tools, and innovate with LLM technologies. Candidates should have 5+ years ...

Backend Engineer Crypto Trading Platform (Go)

Talos, based in London, is seeking a Software Engineer to build high-performance backend systems for crypto trading. You will work on various components including order routing and risk systems, ensuring performance and security in a fast-paced environment. Candidates should have over 3 years of software enginee ...

Senior Backend Engineer, AI Infra & Scale

Nebius is looking for a software engineer in Greater London to join their team focused on AI cloud infrastructure. The role involves scaling distributed systems, optimizing AI performance, and enhancing system reliability. Candidates should have at least 5 years of software development experience, strong skills ...

Senior Backend Engineer, Healthcare Platform

RLDatix is looking for a Richmond-based Senior Software Engineer to join our R&D Engineering team. You will design and implement scalable backend services and troubleshoot distributed systems to enhance our healthcare platform. The ideal candidate will have at least 8 years of experience in software engineering ...

Senior Real Time Streaming Platform Engineer

FDJ UNITED, located in Greater London, is seeking a Senior Software Engineer focused on building and evolving their next-generation trading risk platform. The ideal candidate will have over 5 years of software engineering experience, particularly in distributed systems and streaming technologies like Apache Flin ...

Senior DevOps Engineer — AI & Cloud Automation

Sabio Group is looking for a Senior Software Engineer (DevOps) in London. The role involves designing, building, and maintaining high-quality software solutions with a focus on DevOps practices. You will collaborate with customers to understand their needs, implement CI/CD pipelines, and utilize modern technolog ...

Remote Principal Java Engineer & Tech Leader

Solirius Reply is seeking a Principal Engineer specializing in Java to drive innovation and lead technical teams. The ideal candidate will have strong experience in software architecture and a passion for problem-solving. Responsibilities include managing the full software lifecycle, liaising with stakeholders a ...

Front Office C# .NET Engineer (6m Contract) – London Onsite

SGI is seeking a Software Engineer for a 6-month contract in London, working 2 to 3 days a week onsite. This role involves joining a Pre-trade pricing programme within an Investment Bank, requiring expertise in a C# .Net ecosystem and contributing to React development. Candidates should have 5 to 8 years of Soft ...

Senior Android Engineer Kotlin, Scale & Impact

A leading food delivery service in Greater London is seeking a Software Engineer to enhance their technology infrastructure. The role involves improving code structure and architecture, as well as leading projects in a collaborative environment. Ideal candidates will have over 3 years of experience in Android de ...

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    Software Developer Pythonreact Jobs in London Job Search Guide, Trends and Insights