senior python developer jobs in London

About KXSenior Developer Advocate KX software powers the time-aware data-driven decisions that enable fast-moving companies to outpace competitors, realizing the full potential of their AI investments. The KX platform delivers transformational value by addressing data challenges related to completeness, timeliness and efficiency, ensuring companies...

Location: Paddington, London, UK. Seeking a Senior Specialist with extensive years of experience in Informatica PowerCenter to design develop and optimize ETL solutions for robust data integration Job Description Design develop and implement ETL workflows using Informatica PowerCenter to extract transform and load data efficiently. Collaborate with business...

Join It is a fast-growing B2B SaaS company helping organisations manage and grow their memberships. We support thousands of associations, clubs, and communities globally with software that simplifies recurring billing, member engagement, and day-to-day operations.We’re a lean, ambitious team with big growth goals, and we’re looking for an exceptional...

BitWords Inc. in London/Remote is seeking a backend engineer to build scalable Python-based services and APIs that power millions of users across global markets.You’ll work with Python and Django/FastAPI to design robust server-side applications and high-performance APIs, collaborating with data scientists and infrastructure teams. The role focuses on...

At Insightful Technology, we build intelligent solutions that help organisations manage risk, protect data and stay compliant in an ever-changing world. Our products power global enterprises, financial institutions and regulated organisations, and we’re just getting started. Compliance and surveillance jobs: if you want to work in a place where ideas move...

We're looking for an experienced Senior Software Developer to join a highly technical engineering team developing systems that directly support trading strategies, automated trading, and quantitative research. This opportunity suits a strong C#/.NET engineer who enjoys complex technical challenges, performance-critical development and influencing how...

A senior opportunity for an experienced Delphi developer ready to combine hands-on technical ownership with real mentoring and team leadership. You'll maintain and enhance a large-scale, business-critical enterprise application used by clients globally — while actively raising the capability of the wider team around you. The Role Maintain and enhance a...

Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at senior levels who are passionate about crafting exceptional products. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in...

Location: South East / Hybrid Salary: Competitive, dependent on experience Package: Company car / £600 monthly car allowance + excellent benefits + potential EMI share options The Opportunity An exciting opportunity has arisen for an experienced Senior Business Development Manager to play a key role in the next phase of growth for a leading organisation...

FRENCH SELECTION (FS) Senior Travel Business Development Manager Location: London - hybrid working options available Salary: Between £30,000 and £42,000 per annum depending on experience plus benefits and bonus Please do state your expectations if higher as we will consider for the right experience Ref: 5544M To apply using our preferred format, please...

Tesco is seeking a Software Development Engineer III in Greater London to own end-to-end backend delivery with startup-style urgency, rapid experimentation, and scalable architecture. You will drive high-quality delivery, collaborate with enterprise architects and API teams, and unblock with creativity to realise the team vision.This role emphasizes...

A global technology firm based in London is seeking an experienced Software Engineer to join their Reality Labs research team. The role involves developing software for prototype wearable devices and optimizing data collection platforms. Candidates should have over 8 years of experience, strong Linux skills, and knowledge of RESTful APIs. This position...

WTW in London is seeking a Senior Python AI Engineer to design and build production AI-enabled services. You’ll work on generative AI, agentic systems and RAG, solving real orchestration and grounding problems at enterprise scale.Strong Python, LangGraph/LangChain, FastAPI and Azure experience required. You’ll implement scalable APIs, AI workflows, and...

Medtronic in London is seeking a software engineer to help build and maintain a SaaS tool for project, data, and annotations management using Python. You will collaborate with data and platform engineers to handle growing data volumes and ensure production-grade code quality.The role requires experience with Git, CI/CD, Docker, and cloud platforms (AWS,...

Synapri are seeking an experienced Senior Backend Engineer to join their growing software business in central London. You will take the lead on new projects from early research and technical planning through to architecture, development and final deployment.This role offers influence over technology and product direction, the chance to work with a small...

Block MB is seeking senior Python backend engineers to own data-heavy query and search systems at scale in a fast-growing data intelligence platform. You will build production APIs in Python/FastAPI and optimize queries on billions of records.You'll shape the data layer, own the query language, and collaborate across teams while mentoring juniors. Experience...

Oxford Knight is seeking a strong Software Engineer (Test) to join a market‑making platform in London. You will build Python‑first frameworks and C++‑adjacent hooks to verify distributed systems, accelerate CI/CD, and protect latency‑sensitive releases across asset classes.You’ll work with a highly collaborative team, read/modify C++ test code, and...

JPMorgan Chase & Co. is seeking a Senior Lead Software Engineer to join the Credit data pond team within Wholesale credit risk technology.You will guide technical direction, develop secure production code, and establish enterprise-wide AI-assisted engineering governance to improve quality, speed, and resilience across multiple teams. The role focuses on...

Global Hedge Fund in London is seeking a highly technical Python Developer to join the central Risk team. You will build the platforms and tools used by Risk and Investment professionals to understand portfolios, monitor exposures, and make faster decisions.The role emphasizes real-time, distributed processing, cloud-native infrastructure, and engineering...

A technology-driven trading firm in London seeks a Senior Python Engineer with Qt expertise to develop high-performance desktop GUI applications for real-time trading. The ideal candidate will have hands-on experience with Qt and a strong willingness to learn. Responsibilities include designing responsive interfaces for trading workflows and collaborating...