1 to 25 of 55 Permanent Python Engineer Jobs in the City of London

Founding Backend Engineer | Python, TypeScript, LLMs, RAG | Seed-Funded B2B SaaS | £100,000 - £160,000 + Early Stage Equity | London, Hybrid | Can Sponsor + Relocate The Company We’re supporting a well-funded Seed-stage B2B SaaS startup backed by top-tier European investors. They are automating … next phase is product expansion, deeper automation, and building intelligent systems that turn unstructured data into actionable insights at scale. About the Founding Backend Engineer | Python, TypeScript, LLMs, RAG | Seed-Funded B2B SaaS | £100,000 - £160,000 + Early Stage Equity | London, Hybrid | Can Sponsor + Relocate ...

Principal Software Engineer - Python - Fully Remote Experienced Python Engineer needed for an early-stage Start-Up that is already profitable and looking to expand the founding team. You will be looking to work for a Start-Up and be trusted to take responsibility on the development. … Looking for a world class Python Engineer , with experience with Typescript and ideally DevOps to play a crucial role. About you: 5+ years of professional Software Engineering Experience with proficiency in Python Professional experience with TypeScript Product focussed - worked closely with product during the development cycle, translating ...

Python Engineer This is an exciting opportunity within the growing domain of trading, working for one of the worlds most successful trading firms, As a Python Engineer you will be joining a company that encourages the development of your knowledge, skills and experience, which will allow … Hybrid role Central London based Permanent role 6 Figure Salary Package Responsibilities include : - Working closely with the data scientists and trading team - Building robust Python microservices - Understanding and delivering high quality solutions - Develop full stack applications with the use of python - Implementation of methods and pipelines of data ...

Senior Software Engineer (Python) Hybrid London (1–3 days per week) Up to £80,000 + Benefits Are you a passionate Python engineer who thrives on building scalable, high-quality software? We’re working with a multi-award-winning digital agency , recognised … Sunday Times Best Places to Work , that’s looking for a Senior Software Engineer (Python) to help shape the next generation of their data-driven tools and products. 💡 Why this role? Work at the intersection of data, automation, and AI , delivering tools that drive measurable impact for global ...

Senior Engineer Location: Hybrid (London-based office – 2 days per week) Salary: Up to £80,000 + 10% bonus Overview We’re looking for a Senior Python Engineer to join a growing digital team working on exciting projects in the automotive industry. The company is part … improve the customer experience and help retailers deliver great service. What you’ll be doing Designing, developing and scaling backend systems built primarily in Python Leading technical decisions around architecture, tooling and best practices Mentoring engineers and contributing to raising engineering standards across the team Collaborating closely with Product ...

Software Engineer - Python, React We are working with a leading FinTech who are looking for a Full Stack Engineer to join on a contract basis. You’ll work across Python services and modern front-end applications built with React and TypeScript. The role involves building high … paying £500-£600 per day. This is a hybrid role, 1 day a week in Central London. Please apply now for more information! Software Engineer - Python, React ...

Senior Backend Software Engineer (Python) Web3 Hybrid (HQ: London) £90k - £150k Plexus has another great opportunity with a Senior Backend Engineer (Python) position. Youll play a pivotal role in designing and building robust, scalable backend systems that form the backbone of Web3-first products. Your work … products. Develop and maintain RESTful APIs using Python. Connect backend services with Web3 technologies, including blockchains, DAOs, and smart contracts. Requirements: Strong proficiency in Python and SQL. Hands-on experience with modern Python web frameworks (FastAPI, Flask, or Django). Solid understanding of cloud infrastructure and deployment environments. ...

Principal Software Engineer | Python | Commodities Trading | London Our client is a global investment manager with a strong footprint across major financial centres. They manage multi-asset, commodities, and derivatives strategies for institutional and wholesale clients worldwide. The environment combines the scale and stability of an established asset manager … data-driven technology Close collaboration between trading, quant research, risk and technology teams The firm is now looking for a strong, passionate and experienced Python Engineer to join the Front Office Technology team. They are re-architecting the stack to be cloud-native on AWS , with Python ...

Senior Backend Software Engineer (Python) Web3 Hybrid (HQ: London) £90k - £150k Plexus has another great opportunity with a Senior Backend Engineer (Python) position. Youll play a pivotal role in designing and building robust, scalable backend systems that form the backbone of Web3-first products click apply ...

Senior Software Engineer | Python | Backend | React | Frontend | AWS | London About the company We are an early-stage technology company focused on accelerating the development of more productive, sustainable, nutritious, and climate-resilient food sources. Our work centres on building an ML-driven target discovery platform to support crop … This role will be based in a shared office environment, with regular in-person collaboration. The role We are hiring a full-stack software engineer to build the internal discovery product that ties together workflows developed and optimised over the last two years. You will translate real scientific practice ...

Backend Engineer, Contract | Python (Django), Java and Rust | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across … Python, Django and some Java and Rust. This is a high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment and implementing AI work. What You'll Be Doing as a Backend Engineer, Contract | Python (Django), Java and Rust ...

Senior Python Software Engineer – Analytics & Optimisation • £75,000–£85,000 + bonus • UK or Netherlands | Hybrid (2 days office) Our client is a high-growth marketing technology company reshaping how global brands measure and optimise marketing performance. With a world-class team spanning the UK, Netherlands … tools. You’ll be joining at a pivotal moment, taking ownership of critical modules in a platform used by industry leaders worldwide. The Senior Python Software Engineer – Analytics & Optimisation will play a central role in the development of a high-performance analytics engine powering marketing decisions. This ...

Software Engineer | Python | RAG | Retrieval Augmented Generation | DAG | Dagster | London, UK The role We are hiring an agent-focused software engineer to build internal agentic frameworks for our discovery product. You will define and implement the operating system that allows scientists to run repeatable, agent … evaluation infrastructure so every agent run is reproducible and reviewable by scientists and customers. Core responsibilities Own the architecture and implementation of agentic workflows (Python-first), including state management, retries, branching logic, and human-in-the-loop checkpoints. Build and maintain a tooling interface layer that standardises how agents ...

Senior Python Engineer - Backend Salary: £65,000 – £80,000 + 10% bonus Hybrid: 2 days per week in the office (Holborn, London) We're looking for a Senior Python backend Engineer to help build highly scalable, reliable, and well-designed backend services that power exceptional digital … technical discussions. Identify opportunities to improve engineering workflow and Agile practices. Tech Stack You’ll work with a modern and flexible tech setup including: Python · FastAPI · AWS · OpenSearch · PostgreSQL · Django · GitHub · Kubernetes · Helm · Terraform What You’ll Need Strong experience building backend systems in Python (any framework). ...

Machine Learning Engineer | Python | Pytorch | Natural Language Processing | LLM | Large Language Models | Remote, Europe About Us We build AI assistants that make technical knowledge instantly accessible. As a research engineer, you will work on advancing our system’s ability to answer increasingly complex technical questions. Our technology … note that this position is fully remote in Europe but you MUST have the right to work in your country of residence. Machine Learning Engineer | Python | Pytorch | Natural Language Processing | LLM | Large Language Models | Remote, Europe ...

Senior Software Engineer - Python & C++ We’re supporting a scaling tech-driven business at the intersection of finance and software. This is a pivotal role in a product-led team pushing performance boundaries with elegant code. You’ll be surrounded by sharp minds, real autonomy, and early influence … over architecture decisions. With live deployments already in the hands of major industry players, this isn’t theory - it’s execution. The Software Engineer (Python & C++) will take ownership of complex systems from design through deployment, translating innovation into live tools used by some of the world ...

Python Software Engineer – High-Frequency Trading We're working with a high-frequency trading (HFT) firm that is looking to expand its technology team with a Python Software Engineer. This is an opportunity to join a trading firm operating at the cutting edge of global markets, where … global exchanges. You’ll work on some of the most complex and rewarding engineering challenges in the financial technology space. The Role As a Python Software Engineer, you’ll collaborate with traders, quantitative researchers, and other developers to design, develop, and optimise trading infrastructure. You’ll be directly ...

SENIOR PYTHON ENGINEER LOCATION: London (Hybrid) SALARY: £100,000 + Equity Join a fast-growing innovator transforming property management through AI-driven solutions. Shape the future of automation and make a real impact in a high-growth environment. THE OPPORTUNITY This is a fast-growing innovator … professionals operate and succeed. ROLE AND RESPONSIBILITIES As part of the engineering team, you’ll design and build robust backend systems and APIs using Python and frameworks such as FastAPI, Flask, or Django. The role involves integrating AI models into production environments and optimizing data pipelines for efficiency ...

Python Engineer/Data Scientist (Forward Deployed) - LLM/AI Agent products in Legal Tech. Location: London (Hybrid, 2–3 days onsite) Salary: £80,000–£90,000 + benefits Company: Late-Stage Scaleup in Legal AI Software Our client, a global rapidly expanding Legal AI software company backed … tier investors, is transforming how legal teams operate through intelligent automation and applied AI. They are hiring 2 x customer-facing, hands-on Python Engineer/Data Scientists to join their brand new Forward Deployed team in London. This role sits at the intersection of engineering, data ...

Senior Backend Engineer – Python & DevOps Hybrid (London | 3 days per week) £70,000 – £95,000 + Equity + Benefits Digitech are exclusively partnered with a high-growth AI SaaS start-up operating globally. The company has launched a state-of-the-art AI-driven platform and is entering … significant expansion phase, having scaled rapidly over the past 18 months across engineering, sales, and customer success. As a Senior Backend Engineer, you’ll play a pivotal role in designing, building, and scaling the company’s backend systems and infrastructure. You’ll architect reliable, high-performance services in Python ...

Python Software Engineer - VC-Backed Start-Up - London We're looking for a Python Software Engineer to join a fast-growing start-up developing a standout product in a high-potential, niche market. Backed by one of the world’s most prestigious venture capital firms … building a world-class team. This is a rare opportunity to play a key role at a pivotal stage of growth, where your Python skills will have direct and visible impact . What We’re Looking For 5+ years of professional experience with Python Strong academic background ...

Senior Front Office Software Engineer – Python - Commodities Trading Orbis are partnering with a global Energy Trading firm on the build out of a new greenfield trading desk. As part of this exciting new development, they’re looking for the first Senior Front Office Python Developer to join … provide enhanced analytics and tooling for Traders and Front Office teams To be a successful applicant, you will need: Exceptional programming capability in Python (including pandas) with a deep understanding of Object Oriented Programming and Computer Science fundamentals Previous experience working in a top-tier engineering environment - big tech ...

Principal (Director) Software Engineer - Python, Typescript, React, AWS - Elite funded Fintech **this role will come with a competitive salary, benefits and equity as my client is looking to 10x in the next 5 years** A leading fintech scale-up is hiring a Principal (Director) Software Engineer … impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a Principal (Director) Software Engineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. ...

Python Engineer – Financial Services (Contract, Remote) A financial markets firm are looking for experienced Python developers to help contribute to foundational data and systems work as part of their future deployment of AI models within the firm. You will work across a portfolio of middle and back … systems projects, building enterprise-grade production systems and data pipelines, principally in Python. 5+ years of experience in commercial software engineering 3+ years in Python developing enterprise production-grade applications/systems Strong understanding of data structures and modern data architecture Basic understanding of financial products and trade flows ...

Title: Python Engineer Location: Fully Remote (England) Clearance: Active SC Clearance Required Duration : 12 month contract - will extend Project: Major Defence Programme – Secure Data Exchange Platform Core Mission Build and harden Python based services and data processing components that underpin a secure, scalable, distributed defence platform. Transform … prototype code into operational, production ready modules. This is a hands on engineering role requiring strong Python skills, experience in secure or mission critical environments, and the ability to contribute across backend services, data pipelines, integration layers, and automation. Key Responsibilities • Develop, refine, and maintain Python microservices ...