senior python developer jobs in London

JPMorgan Chase & Co. seeks a Software Engineer III to join the FX Options team.You will design and deliver trusted technology products in a secure, scalable way, collaborating within an agile environment to support the firm's objectives and drive value through robust software solutions. You will contribute across the SDLC, develop high-quality production...

Highbury Consulting in London’s City core seeks a C++ Senior Software Engineer focusing on Data Analytics, with QT and Python. You will contribute to cross-domain data pipelines, optimize algorithms and collaborate on UI/UX-informed developer interfaces.The role targets permanent hires, requires Windows and Unix/Linux experience, and a solid grasp of...

Man Group is seeking a Senior Python Engineer to join the Streaming Data team in our Data Platform Engineering organisation. You will help architect a multi-petabyte scale estate, processing billions of datapoints daily from thousands of data sources using a stack including Java, Python, Kafka, ArcticDB, and MongoDB.You will collaborate with quant...

Kraken is seeking a skilled software engineer to join its Comms team in the UK. You will build real-time communication tech for customer channels, with a focus on voice and telephony, using Python and Django to deliver robust, scalable services.You’ll work with event streams, queues and asynchronous processes to manage interactions, integrate third‑party...

GCS is seeking a Senior Data Engineer for a hybrid, contract role in the banking sector. The role focuses on hands-on engineering using Python, Databricks, Spark/PySpark and SQL, delivering scalable data platforms and analytics capabilities in a modern cloud environment.You will design, develop and optimise pipelines, contribute to data platform stability...

WorldQuant in London is building a scalable platform supporting its quantitative research operations. We seek an experienced software engineer who can own significant pieces of the production codebase, collaborate with researchers, and deliver robust, efficient systems.You will contribute to Python-based services on Linux, with opportunities to learn C++ and...

A leading investment management firm in London is seeking an expert Software Engineer to join their Data Products team. The ideal candidate will have proficiency in Python, TypeScript, and React, with 4+ years of software engineering experience. This full-time role involves developing scalable backend systems and full-stack applications while collaborating...

Nexus Jobs Limited seeks Senior Software Developers/Engineers with strong Python, ML and Go capabilities for a major consulting engagement. The role is initially 3–6 months with potential for permanent transition.The team collaborates on a large project from Central London/Oxford bases, with remote work available for the foreseeable future. Successful...

Signify Technology is seeking a Senior Software Engineer to join a fintech company in London. This role involves designing scalable backend applications and collaborating closely with teams to enhance business-critical platforms.Ideal candidates will have over 5 years of experience, strong skills in Python, SQL, and Linux systems, with a focus on software...

Understanding Recruitment is seeking a Senior Software Engineer (Python) to tackle deep technical challenges and help reinvent how future hardware is created from London. You will join a top-tier, Series A engineering team building a platform that translates hardware requirements into circuit designs, combining software, data and engineering.You will own and...

Arcus Search is partnering with a leading financial services organisation in London to recruit a Senior Python Developer. The role focuses on building a next-generation automation and orchestration platform for massive data scales across storage layers and geographic sites.You will design robust data movement tooling, create self-service tools for...

A leading UK-based tech company is looking for a Senior Software Engineer to take full ownership of its software product. This role involves leading development projects from concept to deployment, focusing on quality and scalability. Candidates should have over 5 years of Python experience, strong cloud architecture knowledge, and the ability to mentor...

Crisil is seeking a Senior Software Engineer to join the Risk Services team within GlobalMarkets. The role focuses on designing scalable, distributed systems that support risk data processing, analytics and reporting workflows.The ideal candidate will have strong experience across Java and Python backends, with a solid understanding of risk data flows and...

Lendable Ltd is seeking a full-stack Python engineer to join our Central Operations team. You will work across Cards, Loans and Motor, building internal web apps and automations to support Ops teams at scale.Expect ownership from an engineering perspective, shipping features used daily by Ops and collaborating with Product, Data Science and Analytics. Hybrid...

EMBS Technology seeks an experienced Senior Python AI Developer to design and build enterprise-grade Generative and Agentic AI solutions. You will implement Python backend services, integrate LLMs and orchestrate prompts within AWS environments, collaborating with senior engineers and platform specialists.The role emphasizes hands-on development, CI/CD, and...

GCS Recruitment seeks a Senior Data Engineer (Python / Spark / Databricks) for a hybrid London-based contract. The role focuses on building scalable data pipelines, Databricks lakehouse architectures, and robust data platforms in a modern cloud environment.Strong expertise in Python, Databricks, Spark/PySpark and SQL is required, with hands-on delivery...

Senior Product Engineer (Python/React) - Tech for goodSalary: Up to £85kLocation: 1-2 days p/week in London (some flexibility)Senior Product Engineer (Python/React) - would you like the opportunity to work for a tech for good organisation operating in the restoration space? They’re currently seeking a Senior Product Engineer where you be a key member of...

Elsevier is seeking a Senior Software Engineer I (Java & Python) to join the Submission and Editorial platform. You will build Document Intelligence capabilities to transform unstructured manuscripts into structured data, enabling AI-driven features and smarter editorial experiences at scale.You'll work with AWS, microservices, and event-driven...

Cognizant in the United Kingdom seeks an experienced software engineer skilled in Python and cloud-native architectures to design, build, test and operate scalable applications and APIs.You will manage AWS infrastructure, CI/CD pipelines and infrastructure as code, collaborating with product, architecture and delivery teams to translate requirements into...

Luxoft in London is seeking a Senior Python Developer to join a high-performing engineering team building a brand-new data and application platform for a leading investment banking client.This hands-on technical leadership role involves defining architecture, mentoring developers, and delivering scalable, enterprise-grade solutions using Python, Databricks,...