10 of 10 Python Software Engineer Jobs in the City of London

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 technology and speed are paramount. They build and … systems that compete across major 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 contributing to systems that … trading infrastructure components. Partner with cross-functional teams to improve tooling, observability, and automation. Deliver robust, production-ready solutions in a fast-paced environment. Requirements Min 2+ years of Python experience in a professional setting (HFT, trading, fintech, or other high-performance domains). Exposure to C++ or willingness to work in multi-language environments is a plus. Familiarity More ❯

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 technology and speed are paramount. They build and … systems that compete across major 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 contributing to systems that … trading infrastructure components. Partner with cross-functional teams to improve tooling, observability, and automation. Deliver robust, production-ready solutions in a fast-paced environment. Requirements Min 2+ years of Python experience in a professional setting (HFT, trading, fintech, or other high-performance domains). Exposure to C++ or willingness to work in multi-language environments is a plus. Familiarity More ❯

A Mid - Senior level Python 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 Software Engineer, you will contribute to the design, development, and delivery of scalable, high-impact features across our platform. You’ll work closely with experienced engineers, product managers, and data scientists to build reliable systems that solve complex financial problems. This role offers an excellent opportunity to deepen your technical expertise, take More ❯

A Mid - Senior level Python 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 Software Engineer, you will contribute to the design, development, and delivery of scalable, high-impact features across our platform. You’ll work closely with experienced engineers, product managers, and data scientists to build reliable systems that solve complex financial problems. This role offers an excellent opportunity to deepen your technical expertise, take More ❯

A well-established business is looking for an accomplished Software Engineer with expert Python skills to join its organisation. Please note, this role is Outside IR35. The company embraces hybrid and flexible working so you will be able to work fully remotely, with occasional visits (perhaps once per month) to the office in London. Web, software, and AI-enabled technology are fundamental to the success of the business so you must have proven experience of developing great software in Python and an interest in adopting cutting-edge technology. In order to be suitable for this Lead Software Engineer role you must be an accomplished developer with a passion for technology and … desire to mentor a team. You will hold proven experience delivering SaaS projects in Python and will be keenly interested in AI and ML. Experience with AWS and data engineering would be advantageous to your application. In this role of significant responsibility, you will be both a Lead Developer and guide 2 in-house developers and an offshore team. More ❯

Software Engineer – AI Startup – Up to 85k 🚀🧠 💰 Salary: £50,000 - £85,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used … and want to solve real-world problems with the latest in AI and LLMs, this role is for you. In this role, you’ll: 🔧 Build and ship high-impact software 🧠 Work on AI/LLM-powered automation tools used in production 🏗️ Help shape scalable systems and infrastructure 🌍 Work collectively across teams to push the product forward 💻 Be working end … adaptable and comfortable working across their stack ✅ Understand the working dynamics of a fast paced start-up If this role sounds like it could be of interest, apply now! Software Engineer – AI Startup – Up to 85k More ❯

Senior Python Engineer – Data & Distributed Systems Location: London (Hybrid) Type: Full-time, Permanent Salary: £120,000+ Equity Options Sector: FinTech About The Role My client is a mission-driven company within the Fin-Tech industry who is looking for a Senior Python Engineer to join their space. What You’ll Do Architect and build scalable backend … systems using Python , Django , and FastAPI Design and optimise ETL pipelines using tools like Airflow , Spark , Snowflake , Redshift , or Dagster Lead initiatives to improve CI/CD , testing frameworks, and developer experience Collaborate cross-functionally to align engineering with business goals Contribute to open-source and internal tooling What We’re Looking For 5+ years of professional experience in … backend or full-stack engineering Strong Python skills with experience in data-heavy , distributed systems Proven success in startup or scale-up environments Experience with cloud platforms (AWS, GCP), containerisation (Docker, Kubernetes), and infrastructure-as-code (Terraform) Familiarity with GraphQL , React/React Native , and CI/CD pipelines Passion for clean code, testing, and mentoring Why Join Us More ❯

clients. The London Market Underwriting & Reinsurance Performance team, consisting of Actuaries, Reinsurance Specialists, and Engineers, is focused on transforming the underwriting business with cutting-edge technology. As a Senior Software Engineer, you will play a pivotal role in researching, designing, testing, developing, and supporting software solutions that drive the future of Property & Casualty underwriting. This is an … exciting opportunity to be part of a dynamic, cross-functional team working on full-stack solutions such as Underwriting Dashboards and Actuarial Model Management platforms. Core Responsibilities: Collaborate with software engineers, data engineers, and underwriters to shape the future of underwriting. Improve workflows and maintain focus on the underwriting experience. Deliver software in small, incremental releases. Drive technical … excellence and agility across the team. Essential Skills & Experience: Strong experience in Python (FastAPI desirable). 3+ years of experience in developing complex software solutions. Solid understanding of object-oriented programming and test-driven development (TDD, BDD). Familiarity with agile software engineering practices. Passion for continual learning and experimentation. Desirable Skills: Frontend technologies such as HTML More ❯

You might just be a perfect fit if you meet some (or all) of the below criteria 🚀 ➡️You have solid programming fundamentals, and 3+ years of experience in either Python or TypeScript ➡️You have worked in an early-stage startup, or with AI Voice or Event-Driven Systems ➡️You love building and shipping products end-to-end, and are More ❯

You might just be a perfect fit if you meet some (or all) of the below criteria 🚀 ➡️You have solid programming fundamentals, and 3+ years of experience in either Python or TypeScript ➡️You have worked in an early-stage startup, or with AI Voice or Event-Driven Systems ➡️You love building and shipping products end-to-end, and are More ❯