Python Software Developer jobs in London

Crossing Hurdles

Responsibilities Develop and maintain production-level applications across Python and Typescript codebases. Lead or support codebase migrations, rewrites, and modernization initiatives. Collaborate with cross-functional teams to produce and refine data for AI training. Ensure clean, maintainable cod

Consortium for Clinical Research and Innovation Singapore

Consortium for Clinical Research and Innovation Singapore is offering a 1-year full-time internship in software development. The role involves frontend and backend development, specifically using Typescript (Angular) and Python (Django). Candidates should be pursuing a Computer Science degree and po

Company Description At bet365, we're one of the world's leading online gambling companies, revolutionising the industry since 2000. Founded by Denise Coates CBE, we now employ over 9,000 people and serve over 100 million customers in 27 languages. Our focus on In‐Play betting has solidified our mark

NatWest Boxed

Senior Software Engineer Opportunity for a technically minded individual. Building and maintaining the services we provide to engineering squads. Increased responsibility and autonomy due to lack of product owner or tech lead. What You'll DoYou'll engage directly with stakeholders, prioritise based

J.P. MORGAN

J.P. MORGAN is seeking a Lead Software Engineer within the Commercial & Investment Bank's Equities Technology team in Greater London. This role requires 12+ years of experience in software engineering, along with expertise in Java, Python, and SQL. The candidate will be responsible for deliverin

Mercor

Mercor is seeking a Software Engineer to develop and maintain complex Python systems in a remote setting. The role requires a strong technical background, with responsibilities including codebase design, performance optimization, and collaboration with AI research teams. The ideal candidate should h

Exciting opportunity for a React / UI Software Developer to join this global Energy company. This is an exciting time to join this world-leading Energy company as it evolves from a traditional Oil & Gas enterprise into a future-focused Energy leader. This transformation includes the establishmen

MissionContribute to the Hutchinson Data Services program and play a key role in designing, building, and deploying scalable data solutions that power real world applications. You will work at the forefront of Industrial IoT and analytics, transforming complex data into actionable insights. Collabor

Understanding Solutions

Python Developer Day Rate: £400 Outside IR35 Duration: 6-months Start Date: ASAP (No long notice periods please) Are you actively looking for your next Python contract and ready to start within the next few weeks? We're working with a Data-Driven Technology Business who are looking for addi

Just Group plc

A financial services company in London is seeking a Software Engineer for their Defined Benefits Team. The role involves designing, developing, and deploying enterprise-grade software. Key tasks include coding in Python and React, working with Azure services, and embedding best practices in DevOps.

N P Associates is looking for a Senior Software Engineer / Principal Software Engineer with over 8 years experience in C++ and a strong background in Python, especially in the Financial and Banking sectors. The role involves developing high-performance, low-latency code for complex trading systems.

Flisher + Partners

An opportunity to join a growing broker/fintech which is seeing strong momentum in the Payments world. The ideal candidate will be responsible for conceptualizing and executing clear, quality code to develop the best software. You will test your code, identify errors, and iterate to ensure quality c

Intermedia Intelligent Communications

ALL CANDIDATES MUST BE LOCATED IN THE UK Department: Development & Engineering Location: United Kingdom About The RoleIntermedia is seeking an experienced SDET Team Leader to lead quality engineering efforts for our Cloud Hosted IP Telephony platform. This role combines technical leadership with

Validus Risk Management Ltd.

Validus is looking for a financial software engineer to join our back-end team. This team is responsible for designing, implementing and maintaining the systems and services powering the rapidly growing, award-winning technology offering at Validus.The back-end team is part of the broader technology

Citigroup

The Analytical Calculation Engine (ACE) Development Team is a group within Citi Financial Risk Technology, responsible for developing and implementing the applications used for derivatives credit risk and exposure calculations Firm-wide. The team's primary focus is the development, testing, deployme

mThree

Want to launch your career as a C++ Junior Developer ? At mthree, we match ambitious graduates with leading global companies across finance, travel, healthcare, and more. What you’ll do You’ll work on large‑scale, mission‑critical software engineering challenges, collaborating closely with Business

Four Squared Recruitment Ltd

Four Squared Recruitment Ltd is seeking a Software Solutions Developer to maintain, enhance, and expand existing systems while developing new ones. The role will involve liaising with teams across the firm to discuss specifications, handling bespoke requirements, and implementing innovative solution

OT Framework Configuration Engineer & Software Developer – Cambridge Reference Code: 441297-en_GBContract Type: PermanentProfessional Communities: Manufacturing & Operations EngineeringYour role Are you passionate about building secure, reliable systems that keep critical industrial operatio

A leading online gambling company is seeking a Software Developer to join their Martech Sports Content team. The role involves building and maintaining systems for customer communication and supporting the existing code base. Candidates should have extensive experience in .NET, C#, and web developme

WeAreTechWomen

Tesco UK • London • Permanent • Apply by 19-Jun-2026We're a new team operating with startup urgency to create new customer growth. Expect end‐to‐end ownership-rapid experimentation, fast shipping, and leaning in wherever the work takes you, beyond your job title. If you're ambitious, hard‐working, a