1 to 25 of 34 Python Software Engineer Jobs in London

Founding Software Engineer | Python | Early-Stage AI Start-Up | London Founding Software Engineer (Python) required to build, scale, and own the technical foundation of a well backed, early-stage AI start-up from day one. This is a rare opportunity for a strong Python Software Engineer to join at the ground floor, working directly with the founders to define the architecture, ship core systems, and shape the long-term technical vision of the company. You’ll have genuine ownership, influence key technical decisions, and play a central role in taking ...

Senior Software Engineer/Principal Software Engineer- C++, Python - Financial/Banking. Candidates will have a minimum 8+ years C++ experience and excellent knowledge of Python -coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange … work with the Product, Infrastructure and QA teams, to produce high performance, low latency and highly reliable code. Your goal will be to develop software which handle large amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this ...

Lead Software Engineer/Developer London/WFH to £120k Are you a skilled a backend focused Python technologist with team leadership experience? You could be progressing your career at a well-funded and profitable FinTech start-up. As a Lead Software Engineer … Central London office with flexibility to work from home twice a week in a hybrid model. About you: You're an experienced Software Engineer with Python expertise and a strong knowledge of software engineering best practices and full SDLC experience You have team leadership experience, happy ...

Senior 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 ...

Senior Software Engineer (Python) Hybrid London (2 days/week) Up to £100,000 + Benefits We're hiring a Senior Software Engineer to play a key role in building and scaling a high-impact ad-fraud prevention platform used globally. This is a senior … contribute to strong team practices Collaborate closely with Product, Design, and Data teams What we're looking for: Strong experience as a Senior Software Engineer in modern product teams Proven ability to design and deliver scalable, reliable systems Experience operating production services Strong coding, code review, and technical ...

this is wrong and we are on a mission to fix it, triggering the future of hardware design. We are creating an entirely new software engine for circuit boards, that takes as inputs the requirements of a circuit board and automatically outputs a complete design, ready for manufacture. … Lead Software Engineer, you’ll create simple and elegant solutions to difficult technical problems that the world has not solved before. You will work in close collaboration with a highly-functioning team of software, electronics, algorithm engineers and product managers. Responsibilities Collaborate with the product team ...

Software Engineer (Python/React) Location: London (Hybrid) Experience: 1-5 Years Sector: Elite FinTech Firm Compensation: Up to £140,000 Base + Industry Leading Bonus + Comprehensive Package A leading FinTech firm in London is seeking a talented Software Engineer to join its growing … could be working on: • Some of the world’s most performant ETL pipelines that deal with billions of data points every second • Software solutions/products with scale, reliability and latency considerations in mind • R&D work for functional programming (either pre-existing languages (such as Rust and Erlang ...

SOFTWARE ENGINEER ( DJANGO/PYTHON ) - SECURITY UK FULLY REMOTE Up to £80,000 + Bonus + Share Scheme + Staff Benefits SECURE has Strategically Partnered with a multi-award-winning, Software-Based Organisation at the forefront of Pre-Emptive Exposure Management. As a market leader backed … Vulnerability Research & Automated Red Teaming. Role Overview: Step in as the engine behind their Intelligence Operations. You will build and scale the high-throughput Python ( Django ) Backend that Collects, Processes & Analyses Large Volumes of Threat Telemetry. By operationalising Complex Data Pipelines & Integrating LLM Workflows, you will directly fuel ...

Backend Software Engineer - Python Location: London (in-office 4 days per week, non-negotiable) Type: Full-time Reports to: Head of Engineering Salary: £90,000-£105,000 + benefits Are you a Senior Backend Engineer who thrives on designing and scaling complex systems? Do you enjoy … from architecture through to production, while contributing to the overall technical direction. Key Responsibilities Design, build, and own backend services and data pipelines in Python Develop and operate streaming systems using Kafka or similar technologies Work with graph-based data structures and algorithms to support analytics and decision-making ...

Backend Software Engineer - Python Location: London (in-office 4 days per week, non-negotiable) Type: Full-time Reports to: Head of Engineering Salary: £90,000-£105,000 + benefits Are you a Senior Backend Engineer who thrives on designing and scaling complex systems? Do you enjoy ...

Founding AI Engineer | Python, Async, LLMs, TypeScript, Cloud | £100k-£160k + Equity | London (Onsite) Build AI products from scratch as part of a founding team. Great opportunity to join a YC-backed AI startup building autonomous voice agents that automate customer interactions, scheduling, and operations for real-world … company is building production AI systems that directly impact how businesses operate, focusing on real-world execution, not experimentation. As a Founding AI Engineer, you'll build and ship core product features across Python, TypeScript, cloud infrastructure, and event-driven systems, taking ownership from idea to production. This ...

Lead Software Engineer/Developer London/WFH to £120k Are you a skilled a backend focused Python technologist with team leadership experience? You could be progressing your career at a well-funded and profitable FinTech start-up. As a Lead Software Engineer ...

Senior Software Engineer – AI Startup – Up to 160k 🚀🧠 💰 Salary: £70,000 - £160,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite … 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 ...

Contract Senior Software Engineer (Java or Python) | Inside IR35 Contract length: 6 months (with potential to extend) Location: London Working Environment: On-site You will be joining a private equity firm as a senior software engineer, to work across the following responsibilities: Develop and support … into auditable, production-grade code Provide production support, working with Platform and SRE teams as needed Key Requirements: Technical: 8+ years commercial experience in Python or Java across the full development lifecycle 5+ years in financial services (buy-side strongly preferred) Solid relational database skills; MS SQL Server ...

Contract Senior Software Engineer (Java or Python) | Inside IR35 Contract length: 6 months (with potential to extend) Location: London Working Environment: On-site You will be joining a private equity firm as a senior software engineer, to work across the following responsibilities: Develop and support … into auditable, production-grade code Provide production support, working with Platform and SRE teams as needed Key Requirements: Technical: 8+ years commercial experience in Python or Java across the full development lifecycle 5+ years in financial services (buy-side strongly preferred) Solid relational database skills; MS SQL Server ...

Java Script Works in London is seeking a Senior Software Engineer to design, develop, and maintain robust software solutions using Python and TypeScript. The role involves optimizing existing systems through performance tuning and code refactoring. This full-time position offers competitive compensation and requires expertise … software engineering. The ideal candidate will have a strong technical background and a passion for modernizing legacy systems. #J-18808-Ljbffr ...

that’s making a real difference. The role What you’d be doing? You’ll collaborate with cross-functional teams to design and implement software solutions that address complex sustainability challenges. Your focus will be on building internal tooling that consultants use to deliver these insights to clients. … span ETL pipelines, data backends, and web applications, ensuring their technology can handle the complex modelling requirements of their sustainability analyses. As a Senior Engineer, you’ll also play a crucial role in establishing and evolving the standards and practices of the new Engineering Team, mentoring less experienced engineers ...

Founding AI Engineer Python, Async, LLMs, TypeScript, Cloud £100k-£160k + Equity London (Onsite) Build AI products from scratch as part of a founding team. Great opportunity to join a YC-backed AI startup building autonomous voice agents that automate customer interactions, scheduling, and operations for real-world ...

Lead Software Engineer is required by this B2B Fintech business as they look to improve their product platform offering and build on their client success. You'll be expected to take more technical leadership than managerial responsibilities, promoting better engineering practice, driving technology improvements and leading from … strong hands-on perspective. This is a web-based reporting platform written in Python and Django, and your decisions around the technical direction will be critical in the future success of the business and how they continue to deliver to their clients. If the opportunity to take responsibility ...

SOFTWARE ENGINEER ( DJANGO/PYTHON ) - SECURITY UK FULLY REMOTE Up to £80,000 + Bonus + Share Scheme + Staff Benefits SECURE has Strategically Partnered with a multi-award-winning, Software-Based Organisation at the forefront of Pre-Emptive Exposure Management. As a market leader backed ...

Senior 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 ...

Senior Software Engineer (Remote/iGaming) - Python Location: Remote-first, UK-based Salary: £90,000-110,000 Heavily Funded: Series C-funded, fast-scaling consumer tech Technical Environment: Python, API Development, Distributed Systems, AWS We're partnered with a fast-growing, heavily funded iGaming platform … involved from problem statement through to release, and play a direct role in shaping how the domain evolves as they migrate from a Python monolith into isolated, resilient services. There's an exciting launch on the horizon in a brand new region. The systems challenge is real: high-throughput ...

developing an award-winning SaaS analytics platform used to assess over £200bn of non-life insurance business? This is a mid to senior level software engineering role focused heavily on production-grade Python development. This is not a web-facing CRUD or API-endpoint development role. The core … . The role: Technical Challenge: Take ownership of performance bottlenecks involving 4GB+ datasets. Architectural Input: Taking new features from conception to deployment Production-Grade Python: Apply software engineering best practices including OOP, unit testing, and CI/CD. Mathematical/Financial Logic: Translating complex analytical, mathematical, or financial ...

Java Script Works is seeking a Senior Software Engineer for a contract role in London. The ideal candidate should demonstrate strong written and verbal communication skills and effectively collaborate across diverse functional teams. Experience with Python, Django, and React is a plus. This position offers competitive compensation ...

Join Barclays as a Senior Software Engineer, where you will design and build scalable C# (.NET/.NET Core) and Python-based calculation engines to drive efficiency and enable dynamic client billing. You will develop robust data models in SQL Server, implement complex business logic, and deliver … latency REST APIs and React-based user interfaces for internal teams. Leveraging Python for analytics, data processing, and automation, you will also containerise applications using Docker and deploy them through secure CI/CD pipelines aligned with Azure. Working closely with business stakeholders, you will ensure billing outputs ...