1 to 25 of 34 Python Engineer Jobs in London

Principal Python Engineer London | Permanent | Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks … used across the business. What youll do: Design, develop, and maintain performant, reliable frameworks and services in Python Build productivity tools and platforms that streamline workflows across investment and technology teams Contribute to code reviews and best practices, improving overall development quality Work across distributed systems, containers, and automation pipelines to deliver scalable solutions What were looking for: 6+ … years professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance to work on complex More ❯

Principal Python Engineer London Permanent Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks … used across the business. What you ll do: Design, develop, and maintain performant, reliable frameworks and services in Python Build productivity tools and platforms that streamline workflows across investment and technology teams Contribute to code reviews and best practices, improving overall development quality Work across distributed systems, containers, and automation pipelines to deliver scalable solutions What we re looking … for: 6+ years professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance to work More ❯

Principal Python Engineer London | Permanent | Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks … used across the business. What you’ll do: Design, develop, and maintain performant, reliable frameworks and services in Python Build productivity tools and platforms that streamline workflows across investment and technology teams Contribute to code reviews and best practices, improving overall development quality Work across distributed systems, containers, and automation pipelines to deliver scalable solutions What we’re looking … for: 6+ years’ professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance to work More ❯

Principal Python Engineer London | Permanent | Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks … used across the business. What you’ll do: Design, develop, and maintain performant, reliable frameworks and services in Python Build productivity tools and platforms that streamline workflows across investment and technology teams Contribute to code reviews and best practices, improving overall development quality Work across distributed systems, containers, and automation pipelines to deliver scalable solutions What we’re looking … for: 6+ years’ professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance to work More ❯

Python Software Engineer/Developer (Python PySpark Azure) London/WFH to £100k Are you a data centric Software Engineer with strong Python coding skills? You could be progressing your career in a senior, hands-on role at a scaling, global technical services company as they look to expand their product offerings with a new … SaaS data analytics platform. As a Python Software Engineer you will join a small team focussed on a huge data platform that provides analytics on mortgage based securities in US markets and is set to revolutionise this space with its advanced technology, providing unprecedented market insight. The role provides many technical challenges, you'll be collaboratively problem solving … as part of an Agile development using a range of technology to create data pipelines with a focus on Python and Spark; you'll be working with Azure, ETL pipelines and CI/CD, ingesting and analysing terabytes of data with varying structures from a range of sources. You'll be continually learning and picking new things up on More ❯

Lead Site Reliability Engineer (Python, AWS, Linux, IaC - Open Data Systems) Applicants must be eligible to undergo SC Clearance Alternative titles: Platform Engineer | Infrastructure Engineer | DevOps Engineer Contract: 12 months Location: London or Manchester (2 days per week on-site) Rate: £650 - 750/day (negotiable for the right candidate), inside IR35 Deadline: COB Friday … 28th November (applications may still be considered after this date) Summary of Tech Stack Python | AWS | Linux IaC (Terraform/CloudFormation) Containerisation (Kubernetes/ECS) CI/CD Pipelines Observability Security About the Project Join a transformative initiative to revolutionize how the public sector makes its data accessible and reusable. You'll help build a modern, reliable data hub … that provides seamless access to a wide range of public sector data. We're seeking a Lead Site Reliability Engineer with proven technical leadership skills to shape the future of this platform. You'll provide design thinking for long-term goals, collaborate with designers and developers, and take ownership of building robust infrastructure and automation. What You'll Do More ❯

Python Engineer £750 - £800 per day 2 days onsite We're working with a global healthcare and AI research organisation that's pioneering the use of advanced Machine Learning to accelerate the discovery and delivery of life-changing treatments. Their vision is to enable faster, personalised therapies that improve patient outcomes worldwide - and they're seeking a Backend … Software Engineer to help bring that mission to life. The Role You'll be joining a multidisciplinary AI/ML team responsible for developing the infrastructure and software that powers cutting-edge research and intelligent applications. The role focuses on backend development in Python, integrating AI components with data, compute, and frontend systems to create scalable, high-performance … solutions. Day-to-day responsibilities include: Designing and implementing backend services for Python-based web applications (e.g., FastAPI). Integrating AI and ML components into production systems and APIs. Writing high-quality, well-tested, and well-documented code following best practices. Developing and monitoring metrics to improve system reliability and performance. Collaborating closely with frontend engineers, data engineers, and More ❯

A Mid Level Python Engineer is required to join a Fintech company developing next generation tools for how companies get funding and optimise their working capital. 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 Python Engineers, Data Scientists, and financial experts, who are building the next generation of financial toolsscalable, secure, and smart. If you're an experience Software Engineer whose passionate about Python, excited by financial technology, and eager to build meaningful systems from the ground up, we want to hear from you. … As a Python Software Engineer, you will contribute to the design, development, and delivery of scalable, high-impact features across our platform. Youll 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 ownership of individual projects More ❯

Senior Python Engineer Salary: Pays up to £85,000 Location: London (2 Days in Office) Join a high-performance engineering team redefining how global systems fight fraud at scale, where you'll architect resilient solutions, shape technical direction, and mentor others to deliver mission-critical impact with performance, reliability, and simplicity. The Opportunity Step into a pivotal role … where your engineering expertise shapes the future of digital integrity. As a Senior Engineer, you'll design and deliver high-impact, cross-service features that power a cutting-edge platform used by global customers. You'll have the freedom to make architectural decisions, drive performance and reliability improvements, and mentor talented engineers across a collaborative, high-growth environment. This … ideas into resilient, production-ready solutions. You'll also mentor engineers, set quality standards, and champion best practices in testing and security. Our modern tech stack includes TypeScript, Node.js, Python, PostgreSQL, AWS, Docker, and Kubernetes, giving you the tools to innovate and deliver impact at scale. Interview Process: 30 minute introductory meeting Technical challenge, will include a shared screen More ❯

Job Title: Senior Python Backend Engineer (Generative AI) Location: London - Hybrid 2x Per Week Role Type: Contract, £650-800 Per Day, Inside IR35 The Role We are seeking an experienced Senior Python Backend Engineer to build, scale, and maintain the production infrastructure for Generative AI and chatbot applications. This role is responsible for the live production … backend services, managing cloud infrastructure, and ensuring application reliability at scale. What You'll Be Responsible For Backend Development: Design, build, and maintain scalable backend services and APIs using Python (FastAPI needed). System Architecture: Make design decisions for our production systems, focusing on reliability and efficiency. Asynchronous Programming: Implement and manage asynchronous workflows and concurrent processes. Containerization: Utilize … ingestion pipelines and the integration of large language models (LLMs). Must-Have Qualifications Experience: 5+ years in software development, including experience managing live production systems at scale . Python Expertise: Demonstrable expertise in Python backend development (FastAPI, Flask, or Django). Containerization: Hands-on experience with Docker and container-based workflows. Cloud Proficiency: Proven ability to deploy More ❯

Principal Python Engineer London Permanent Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and framewor More ❯

Back End Engineer - Python £60,000 to 70,000 GBP 10% Bonus Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Back End Engineer - London (Hybrid) Location: London (Hybrid - 2 days in office: Tuesday & Thursday) Salary: £60,000 to £70,000 + Bonus + Private Medical Sponsorship: Not available About the Role We're working … it continues to deliver cutting-edge digital solutions. You'll join a collaborative engineering group where innovation, ownership, and technical excellence are encouraged every day. As a Back End Engineer , you'll play a key role in designing, building, and maintaining highly scalable back-end services. You'll collaborate closely with Product, Design, and Engineering teams, contributing ideas and … technical insight across the full development lifecycle. If you're a Python specialist who enjoys solving complex problems and building clean, efficient systems in the cloud, this role is for you. What You'll Do Design and develop robust, scalable, and maintainable backend services. Contribute to architectural decisions and suggest new tools, frameworks, or best practices. Collaborate closely with More ❯

Sr Python software engineer - Analytics & Optimisation Are you passionate about building advanced analytics solutions that drive real business impact? Join ScanmarQED as a Senior Python Software Engineer – Analytics & Optimization and help shape the analytic core of our Pulse product, a marketing analytics platform used by leading companies worldwide. You'll work with a talented, international team … have the flexibility to work from the UK, the Netherlands, or (where appropriate) remotely. What will you be doing? Design, develop, and maintain robust, well-structured, and well-documented Python-based analytics and optimization modules for our Pulse product. Implement and optimize algorithms for econometric marketing mix modeling, forecasting, and advanced analytics. Tackle large-scale data processing, model optimization … analytics platform. Review code, share knowledge, and contribute to best practices within the team. Skills, experience, and education you'll need Minimum 5 years of hands-on experience with Python, including scientific libraries (especially SciPy). Master's degree in Mathematics, Computer Science, or a closely related quantitative field. Very strong background in mathematics, analytics, or statistical modeling. Proven More ❯

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, the company is gaining serious traction and 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 (BSc or MSc from a top Russell Group university) Start-Up mentality: adaptable, proactive, and comfortable … from day one Join an elite team early and shape the tech culture and direction Competitive salary Flexible hybrid work opportunity - London Currently interviewing - apply now for immediate review. Python Software Engineer - VC-Backed Startup - London More ❯

Back End Engineer - Python £60,000 to 70,000 GBP 10% Bonus Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Back End Engineer - London (Hybrid) Location: London (Hybrid - 2 days in office: Tuesday & Thursday) Salary: £60,000 to £70,000 + Bonus + Private Medical Sponsorship: Not available About the Role We're working More ❯

Data Engineer (Python) - Leading Asset Manager | London (Hybrid) Brand-new team. High autonomy. Big impact and high bonus! A top Asset Manager is building a new data function from scratch , and they need a sharp Data Engineer to help define and deliver their future data strategy. You'll work directly with senior stakeholders, own your pipelines, and … team! Hybrid: 3 days in London office, 2 days WFH (flexible when needed). The Role Build and optimise scalable data pipelines for a new Data Lake Work with Python, SQL, Spark, AWS, Docker, CI/CD Orchestrate workflows using Airflow, Prefect, or Dagster Support ETL, API integrations, and high-quality data validation Translate business needs into technical solutions … with full ownership What You Need STEM degree (Computer Science, Engineering, Maths, etc.) 2+ years in data engineering/analytics/software Strong Python + SQL 2+ years ETL, APIs, CI/CD, Docker, AWS Ideally but not essential experience with Airflow/Prefect/Dagster Background in Financial Services, FinTech, Insurance, PE/VC, or Banking Package & Benefits More ❯

we do that matters–it's how we do it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus. We are seeking a Python Engineer to join an established multi-asset trading team with a global presence. The position offers a unique opportunity to influence the design and architecture of a growing … Qualifications Strong preference for experience developing trading-related software or coming from a complex technology-based organization Minimum of 3 years of professional development, demonstrating excellent, detailed understanding of Python Able to analyze business requests and translate to technical specifications and solutions Able to teach others Experience optimizing distributed systems Experience of data-intensive systems development Excellent communication and More ❯

Python Software Engineer/Developer (Python PySpark Azure) London/WFH to £100k Are you a data centric Software Engineer with strong Python coding skills? You could be progressing your career in a senior, hands-on role at a scaling, global technical services company as they look to expand their product offerings with a new More ❯

Python Data Engineer Azure & PySpark - SC Cleared Contract £400-£458pd (Inside IR35) SC Clearance is Essential Summary Were looking for a Python Data Engineer skilled in PySpark, Delta Lake, Azure services, containerized development, and Behave-based testing. Youll design and build scalable data pipelines and maintain high-quality, test-driven code in a cloud environment. What … youll do Build and maintain Python/PySpark pipelines for data ingestion, processing, and validation. Write unit and BDD tests using Behave, including mocking and patching. Create and optimize Delta Lake tables for reliable, performant data storage. Use Docker to manage consistent development, testing, and deployment environments. Build configurable, parameter-driven code for modular data solutions. Work with Azure … and DevOps on CI/CD and deployment. Tune and troubleshoot Spark jobs in production. Document solutions and follow cloud security and governance best practices. Skills you need Strong Python skills with a focus on clean, test-driven code. Experience writing Behave tests and using mocking/patching techniques. Solid PySpark knowledge and experience with distributed data processing. Understanding More ❯

Python Data Engineer Azure & PySpark - SC Cleared Contract £400-£458pd (Inside IR35) SC Clearance is Essential Summary Were looking for a Python Data Engineer skilled in PySpark, Delta Lake, Azure services, containerized development, and Behave-based testing click apply for full job details More ❯

the great part is that you don't have to be as strong on the AI side as the true AI Engineers, your key impact will come on the Python side. Over time, you'll pick up the expert level skills in AI and vice versa for the others. So, with that, it'll be no surprise that you … re going to need to be a great Python software developer. Additionally, strong experience working with data and building microservices will also be a huge plus. Some experience with LLMs/GenAI will be necessary but you don't need to be an expert. You'll be joining a scale-up AI Consultancy who are working closely with clients … salary will be up to £130,000 plus a range of benefits that are continuously improving as the company grows. Want to build your AI skills whilst leveraging your Python development skills? Get in touch. No up-to-date CV required. More ❯

Codurance is an innovative consultancy that helps organisations embrace the power of technology to drive business success. We are currently seeking an experienced contract software engineer to join our dynamic team. As a Codurance software engineer, you will have the opportunity to work with the latest technologies and contribute to the success of our clients' projects. This is … you know that you might be asked to join a support rota for one week out of every eight. This will come with extra compensation. Essential: Strong experience with Python backend services and proficient in React development Django framework experience (or other Python web frameworks) Solid understanding of relational databases and data modelling Hands-on experience with AWS … deployment) We are looking for individuals who are passionate about software development and can contribute effectively in a team setting. If you are a motivated and skilled Contract Software Engineer, we would love to hear from you. Everyone should have the right to bring their whole self to work and be celebrated for who they are. Our people are More ❯

Role title: Senior Python Developer Location: London, UK and/or Krakow, Poland Contract: full time - Long term engagement Start date: January/February 2026 Overview: We are seeking a Senior Python Developer with extensive experience in investment banking to join our client's technology and quantitative development team. The successful candidate will play a key role in … designing, developing, and maintaining high-performance applications supporting trading, risk, and analytics functions. Key Responsibilities: Design, develop, and optimise scalable Python-based applications for front-office and risk teams. Collaborate with quantitative analysts, traders, and other developers to deliver business-critical solutions. Enhance existing systems to improve performance, automation, and integration with trading platforms. Contribute to system architecture, testing … and continuous deployment processes. Requirements: Proven experience as a Python Developer within investment banking, hedge funds, or financial markets. Strong knowledge of object-oriented programming, design patterns, and data structures. Experience with SQL and familiarity with databases such as Oracle or PostgreSQL. Exposure to C++ or Java is a plus. Solid understanding of front-office trading environments, risk systems More ❯

Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (UK) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? ?? This is your chance to join a research-driven, venture-backed security scale-up thats trusted by some of the worlds biggest enterprises and critical infrastructure providers. Recognised … by Gartner, armed with funding, and scaling aggressively worldwide, theyre on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer , youll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions of assetshelping global security teams uncover exposures before attackers do. … platform experience Continuously improving systems performance, deployment, and monitoring as the company scales globally What theyre looking for: 5+ years experience designing and maintaining mission-critical backend applications Strong Python engineering skills , with a track record of building performant, maintainable, and testable systems Solid background in microservices architecture Proficiency with Postgres & MongoDB (relational + non-relational) Experience with event 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 across … 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 ❯