1 to 25 of 42 Permanent Python Developer Jobs in the Thames Valley

Python Developer/Backend Developer/Senior Software Engineer - AI Startup (London, Hybrid) Location: London (Hybrid – 1 day per week in office) Package: £70k–£100k + equity We are partnered with a fast-growing AI startup building a cutting-edge product that redefines what’s possible in engineering. To accelerate their growth, we’re looking for a … talented Python Developer/Software Engineer to join our London team and help build scalable, production-grade AI systems and tools. The Role As a Python Developer, you’ll be a key part of our core engineering team, developing backend systems, APIs, and data pipelines that power our AI products. You’ll collaborate closely with machine … production-ready applications. This is a high-impact opportunity to shape the engineering foundations of a pioneering AI company. Responsibilities • Design, build, and maintain high-performance backend systems in Python • Develop and optimize APIs, data processing pipelines, and integration layers • Collaborate with ML engineers to deploy and scale AI models into production Requirements • 3–6 years of experience as More ❯

Python Developer/Backend Software Engineer (FastAPI SQL Data) London to £90k Are you a data centric Python Developer with strong SQL and FastAPI skills? You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting technology provider that focusses on developing a complex SaaS calculation platform for … Insurance, Income Protection Pension Subsidised gym membership X4 paid volunteering days per year Season ticket loan Employee Assistance Programme Impactful role with great career progression Your role: As a Python Developer you will design and develop data centric backend services for the core platform with a focus on Python coding and building FastAPIs within an Azure environment … WFH: There's a hybrid work from home model with three days a week in the high spec London, City office with rooftop bar. About you: You have strong Python backend software engineering skills You have experience of building FastAPIs You have a good knowledge of public cloud services, they're using Azure but experience with AWS or GCP More ❯

Backend Developer – Python Location: London (Hybrid, 2 days per week) Are you a talented Backend Developer looking for a role that offers real variety, technical challenge, and the chance to work on projects that make an impact? Our client is a highly regarded digital innovator, delivering complex, high-performance systems for some of the most recognisable brands … in Europe. They’re seeking a Backend Developer – Python to join their growing engineering team, where you’ll be involved in a range of exciting projects spanning different industries and technologies. You’ll work in a collaborative, fast-moving environment, developing scalable backend services that power large-scale digital platforms, giving you the opportunity to sharpen your technical … ecosystems. In this role, you’ll gain exposure to: A wide variety of projects – from greenfield builds to large-scale platform modernisation Modern technologies and cloud-native tools including Python, FastAPI, AWS, PostgreSQL, Django, Kubernetes, Terraform, and GitHub A culture that values technical excellence, continuous learning, and creative problem-solving The ideal Backend Developer – Python will have More ❯

Full stack Python Developer – Sports betting Hedge fund – London Option to work from home up to 4 days a week or fully remote. Full stack Python Developer is required for a leading provider of sports betting brokerage software worldwide based in London. The successful Full stack Python/TypeScript Developer will be to joining … a small, tight-knit team, working closely with the quantitative researchers and alongside other extremely talented and driven engineers to build and support systematic trading models. The successful fullstack python/typescript developer will write high-quality asynchronous Python code to interact with external websites and APIs, build responsive, data-rich frontend features using React and TypeScript … architectural discussions and propose platform improvements, work in a Linux environment using Docker and Kubernetes and follow Agile practices using Scrum, GitLab, and Jira. Essential Skills: 2+ years of Python experience in a commercial environment, with strong asynchronous programming skills 2+ years of frontend development experience with React and modern JavaScript/TypeScript Demonstrated ability to build and maintain More ❯

Front Office Python Developer | *Metals Trading Desk* | £950/Day Inside IR35 | 6 months rolling | Hybrid 2 days London We’re seeking a Senior Front Office Python Developer to join a specialist global Energy & Commodities trading firm. The business is a long-standing market leader with activity across multiple commodity classes — this role sits within the … and will support both financial and physical trading teams. The role will focus on building and improving a modern metals trading analytics & visualisation platform. You’ll deliver production-grade Python systems, dashboards, automation and data pipelines that provide traders and risk teams with fast, reliable insights to support trading and risk decision-making. 📍 6 month rolling contract (strong likelihood … of multi-year renewals) 💸 Rate: Up to £950/day , Inside IR35 🚂 Working pattern: Hybrid — 2 days per week in London office 💻 Python, Front Office Trading Systems, Metals Commodity Knowledge Key responsibilities Design, develop and maintain production Python services and ETL pipelines for trading analytics. Build and enhance dashboards and visualisations (Grafana or equivalent) for traders and risk More ❯

Remote/Hybrid options likely) Start Date: Immediate Duration: 4-6 Months (Initially) Clearance: Must be UK Security Check (SC) ready or eligible. We are urgently seeking an experienced Python Developer to play a pivotal role in integrating a sophisticated LLM solution into our core business platform, INTACT. This is not just a maintenance role; you will be … key person ensuring the AI tool and our systems communicate seamlessly, processing data intelligently and delivering robust, production-ready results. This is a hands-on role perfect for a developer who enjoys solving complex integration puzzles and writing clean, effective code that has a direct business impact. Key Responsibilities: In this role, you will: Develop Core Integration Logic: Write … the Python code that enables our INTACT platform to connect, exchange information, and manage file transfers with an external AI tool. Design & Implement Business Workflows: Create the intelligent processes that determine if a case is new or a re-run, fetch the correct files, and guide the overall processing flow. Manage LLM Interaction: Build the components responsible for sending More ❯

Role: Lead Python Developer Location: London, UK Is it Permanent/Contract: Contract Is it Onsite/Remote/Hybrid: Hybrid/Remote with occasional Visits Start Date: Immediate (Only considering for who can start by next week) No. of Positions: 1 Job Description: Python Developer Principal Accountabilities Develop backend systems using Python, FastAPI, and … performing Coach and support junior engineers; assist with onboarding Collaborate with cross-functional teams to align on technical goals Foster a culture of innovation and continuous improvement Technical Skills Python Expertise: Strong proficiency in Python, especially with FastAPI, SQL Alchemy, and Celery. Azure PaaS: Hands-on experience with Azure services like App Services, Function Apps, API Management, Service More ❯

Python Quant Developer | *Metals Trading* | £950/Day Inside IR35 | 6 months rolling | Hybrid 2 day London Senior Python Quant Developer is required for a specialist global Energy and Commodities Trading firm. This firm operates across numerous Energy and Commodity classes, being a long-standing market leader in the sector. This Python Quant Developer … will play a pivotal part in equipping both financial and physical trading teams with data-driven insights while supporting the expansion of a sophisticated, multi-asset trading book. This Python Quant Developer role focuses on developing dashboards, analytical tools, and risk frameworks to support a multi-asset trading book spanning metals, forex, and derivatives. The position combines system … and close collaboration with trading and research teams. 📍6 Month rolling contract – multi-year renewals 💸 Up to £950 per day, INside IR35 🚂 Hybrid working: 2 days in office LDN 💻 Python, R, Data Analysis, Stat Modelling, Grafana, Metals Experience is a MUST Essential Skills for this Quant Developer role: Extensive Python or R experience Extensive Data Analysis and More ❯

Position: Senior Python Developer Employment Type: Contract Start: ASAP (October/November 2025) Duration: 6 Months Location: London, UK - Hybrid Language(s): English Focus on SAP is a specialist SAP and ERP Recruitment organisation offering both permanent and contract staffing solutions on a global scale. Client – Partnered with a global leader in digital transformation and IT services, working … the people and communities they serve. For you, this means working on challenging projects that demand innovation, collaboration, and thought leadership . Role – We are seeking a talented Senior Python Developer to join a global orgnisation within its Trading Analytics & Insights division. The team is responsible for delivering data-driven solutions, analytical models, and digital tools that empower … analytics applications that directly influence trading strategies and business decisions. Key Responsibilities: Partner with analysts and stakeholders to translate business requirements into robust technical solutions . Develop high-quality Python applications and reusable frameworks for analytics, data management, and reporting. Build interactive dashboards and data visualisations using Plotly Dash, Power BI , or similar technologies. Contribute to the development of More ❯

include large Private Equity funds, Asset Managers, listed Corporates, high-growth tech companies and many more. Learn more about why we do what we do here. The role: Senior Python Developer Join our lean UK-based technology team as a Senior Python Developer, where you'll play a pivotal role in the development of our systems. … side REST and GraphQL APIs written in Python3. What we’re looking for... Essential skills and experience: 5+ years experience of developing complex applications using an OO language (ideally Python, but experience in C++/C#/Java/etc would also be considered) Experience working on mission-critical applications, following a robust SDLC Excellent communication and problem-solving … skills; and a strong aptitude for learning Experience and enthusiasm for test-automation and CI/CD Strong STEM degree or equivalent professional experience Desirable skills: Deep knowledge of Python, including any of the frameworks we currently use: Flask, SqlAlchemy, Alembic, Pydantic Experience with relational databases, ideally Postgres Experience of message-based architectures, and queuing technologies, i.e. RabbitMQ Experience More ❯

Role: Python Software Developer - Treasury Location: London Industry: Hedge Funds Overview: A global multi-strategy hedge fund is looking to add an experienced Python Developer to join their Treasury team in London. The firm operates at hedge fund scale with a start-up pace, focusing on building high-performance trading platforms. In this role, you will … liquidity management systems, working directly with traders and decision-makers in a live-market environment. Responsibilities: Architect and code resilient applications for trading, liquidity management, and funding operations using Python as the core language, with integration into data platforms and tools. Engage directly with traders and treasury stakeholders during live situations, adapting to evolving requirements and delivering solutions on … design patterns to enhance speed and quality. Experience: 5-15 years of software engineering experience, ideally in Treasury or from a hedge fund/buy-side firm Expertise in Python for designing and optimising complex applications Strong proficiency in data tools like Pandas, NumPy, SQL, and real-time data processing Familiarity with DevOps practices, including Linux, cloud platforms, and More ❯

Senior Python Developer | Electronics x AI £100k to £130k base + stock options + benefits Hybrid within the UK. Office days usually Wednesday and Thursday The mission Build software that lets teams design electronics at ridiculous speed using AI. Turn research into production systems that ship. What you will do Own Python services and APIs for AI … production code Optimise performance for compute heavy workloads Collaborate with ML and product to ship end to end Improve CI, monitoring, and release quality What you will bring Strong Python in production and senior-level ownership Depth in one of: algorithms, optimisation, ML, signal processing, or EDA Experience with some of: Django, FastAPI, GraphQL, PostgreSQL, Redis, Docker, pytest, mypy … Pragmatic testing, profiling, and code review habits Our tech Python 3.11, Django, GraphQL, PostgreSQL, Redis, Docker, CI, mypy. TypeScript and React on the product surface. Why this is worth your time High ownership on core systems with real product impact Meaningful equity and competitive salary Flexible hybrid setup with modern tooling Smart teammates, zero corporate sludge The process Screening More ❯

Senior Python developer to join our clients Network Automation team. You will be comfortable with Django/Flask, Gitlab and have experience of container infrastructure. This is a three month rolling contract that will require you in the office, just outside London twice a week at rate of £500 a day (inside IR35). The role will involve … will be required as part of the development as well as maintaining a high standard for code readability and collaboration. Required skills and experience: 3 years commercial experience with Python Experience with Web frameworks such as Django and Flask Experience of using and building RESTful APIs using Python Experience with Front-end development (HTML, CSS, Javascript) Experience with More ❯

Python Engineer – Global Book Publisher | £50,000 - £56,000 | Hybrid (3 days London) We’re looking for a Python Engineer to join one of the world’s largest book publishers — supporting the sale, marketing, and distribution of A-list authors across the globe. You’ll be part of the Growth and Analytics team, working with huge volumes of … at any given time. What you’ll be doing Building, maintaining, and improving web scraping tools to collect, structure, and enrich data from a variety of online platforms. Developing Python-based solutions that transform raw data into meaningful insight for marketing, sales, and operational teams. Collaborating with analysts and business stakeholders to design and deliver data-driven tools that … support smarter decisions and drive author exposure. Exploring new ways to integrate AI and automation into data workflows, unlocking even more potential from their datasets. Skills & Experience Strong Python experience Experience with a web framework – Flask, FastAPI, Django, etc. Solid understanding of Pandas/NumPy for data manipulation SQL Server experience Experience building or maintaining web scraping tools to More ❯

Front Office Python Developer – Trading Systems Orbis are proudly working with a global Trading firm who are redefining how data and technology shape the future of their market, and are fully embracing GenAI across the enterprise. They are looking for a Front Office Software Engineer with excellent Python experience to be at the forefront of this evolution. … As a Front Office Python Software Engineer, this is an incredible opportunity to work side-by-side with Traders, building high-performance systems and innovative tools contributing to PnL, by helping Traders understand markets, forecast movements, and act with confidence. In this role, you will be responsible for: Partnering directly with Traders to design, build, and own production Trading … systems developed in Python Designing and developing solutions to analyse market data, manage trading positions, and support the models that drive front-office decision-making Designing cloud-native tools integrating with the Front Office platforms to provide enhances analytics and tooling for Traders and Front Office teams To be a successful applicant, you will need: Extensive experience of Software More ❯

Senior Software Developer – Python/Ruby Location: London (2/3 days per week on-site) Rate: Up to £650/day (Inside IR35 – 12-month Contract) A major UK government department is seeking an experienced Senior Software Developer to play a key role in the redevelopment of a critical national open data platform. This is a … practices. Representing the team in internal and external technical discussions and communities. What You’ll Bring To thrive in this role, you will need: Expert-level coding ability in Python or Ruby, plus experience with at least one other modern language. A strong track record of developing and delivering production-grade web services. Experience working with Git and writing More ❯

Front Office FX Trading Technology - Global Banking & Markets A leading global investment bank is seeking a Python Developer to join its Front Office FX Options Technology team. This is a high-impact role where you’ll work closely with traders and developers to build cutting-edge, high-performance trading systems - leveraging big data and algorithmic models to analyse … pipelines, and market connectivity. Integrate trading systems with upstream trade execution and regulatory platforms. Work within an agile team delivering high-priority solutions under tight deadlines. Skills & Experience Strong Python (or OO language: Java, C#, C++) development experience. Solid understanding of data structures, algorithms, and design patterns. Experience with SQL/NoSQL, APIs, and distributed systems. Familiarity with agile More ❯

A Python Backend Engineer is needed to join growing software house in London who specialise in helping businesses reduce wasteful processes, costs and energy; and improve their ROI. sustainability meets profitability. Our client aims to change how corporate finance works, by replacing static, limited and often stale financial metrics with live data-driven insights sourced from direct connections to … their clients’ systems. You will be joining a strong team of Backend Python Engineers, Data Scientists, and financial experts, who are building the next generation of financial tools. If you're an experience Software Engineer whose passionate about Python, excited by financial technology, and wants to solve complex problems, this could be for you. As a Python … in a supportive, fast-paced startup environment. Requirements: 1st class - 2;1 Degree in Comp Sci or STEM subject from a Top ranked University 3+ years of experience in Python development Tech: Python, FastAPI, Pydantic, PostgreSQL, Numpy, Pandas, AWS DevOps tools: Kubernetes, Docker,Terraform, Jenkins Very strong software engineering principles Enthusiasm for startup environment and cross-functional teams More ❯

Role: Software Developer (Python) - Up to £140,000 + Bonus + Package Salary: Up to £140,000 + Bonus + Package Location: London (Hybrid Working) Skills: Python as a main language This firm is an elite tech firm with high standards who have previously set tech world records. They are made up of some exceptionally talented individuals More ❯

Python Architect – London (Onsite, Full-time) Competitive Salary + Bonus We’re working with a high-performing global investment firm that’s rebuilding its technology foundations — and they’re looking for a Python Architect to help design and deliver the systems that power their research, data, and risk functions. This is a chance to join a small, elite … across research, data, and operations. Develop scalable data flows and microservices that connect critical systems. Own architectural decisions around reliability, scalability and cloud infrastructure . Work hands-on with Python, Snowflake, Kubernetes, Docker, and Dash . Partner closely with quantitative analysts and business teams to deliver real-world solutions. What We’re Looking For Proven experience in Python More ❯

Python Developers | London | £100,000 – £170,000 + Equity You'll be joining a team that are making it easier for large industries to bring AI into production. The tech focuses on scaling, reliability, and making AI systems practical. The team is early but moving fast with strong backing and real commercial momentum. The Role You will build the … decisions as part of a small, senior team that values initiative over hierarchy. What You Will Bring 2+ years of experience building production grade systems Strong coding background in Python/Fast API However, any modern language is OK (we just want amazing Developers!) Experience with databases, APIs, and distributed computing Exposure to cloud infrastructure (AWS preferred) and IaC More ❯

Job Title: AVP – Python/Java Developer Location: London (Hybrid, 2 days in-office) Salary: Up to £120k About the Role: Join a brand-new team at a leading global investment bank, working at the heart of FX Data & Analytics. You’ll be building and supporting the core data and analytics layer that bridges downstream data sources and … upstream React-based UIs. The work is a blend of Python and Java, with a strong focus on Python for data transformation and analytics, and Java for connecting to front-end systems. Key Responsibilities: Develop and maintain the data and analytics layer (Python/Java) supporting business-critical dashboards. Collaborate closely with quant developers and business stakeholders. … in connecting to diverse data sources and running analytics. Help shape the technical direction of a new team and greenfield projects. What We’re Looking For: Strong experience with Python and Java (framework experience; not core Java/low-latency focus). E-Trading experience. Confident working with business users and stakeholders, including quants. Flexible on the Python More ❯

£70-90k + Benefits 2 days on site in North London 3 days remote I am recruiting for a talented and driven Senior Backend Engineer to join a dynamic team, focused on the creation and deployment of innovative software More ❯

GenAI Python Developers x4 Location: Hybrid/London Available as permanent or contract: Contract Rate: £400–£450 per day (Inside IR35, initial 6-9 months) Permanent Salary: £60k–£70k per annum GenAI | Python | Enterprise AI Platform - Build the core of a next-gen Generative AI ecosystem for a global finance services business. If you’re a strong Python … help architect, automate, and operationalise LLM-driven services at scale. What You’ll Be Doing: Building backend services and APIs that give secure, governed access to LLM capabilities Developing Python-based GenAI components, including prompt orchestration and evaluation tooling Integrating LLMs with enterprise systems, observability layers, and security frameworks Designing and maintaining CI/CD pipelines using Azure DevOps … shape platform patterns, reusable components, and clear documentation Troubleshooting performance issues across distributed systems and cloud services What You’ll Bring: 5+ years of backend engineering experience, with strong Python at the core Hands-on exposure to GenAI technologies and Large Language Models Practical understanding of LLM evaluation, prompt handling, and operational complexities A DevOps-first approach with experience More ❯

Quantitative Developer - £250,000 Total Compensation We are seeking strong Python focused Quantitative Developers with 4 years + of experience to join one of the most successful hedge funds in London. There are roles across multiple teams so they can find the best fit for your experience and skill set! The fund is currently building out a new More ❯