1 to 25 of 56 Python Engineer Jobs in the City of London

AI Software Engineer | Python | AWS | Kubernetes | CI/CD | LLM | LangChain | UK, Remote About the Role As a Backend Engineer, you’ll play a central role in shaping a new product with a strong focus on AI Agents and machine learning systems. This position offers a unique opportunity to help design, build, and scale a product from … We’re Looking For Experience: 7+ years of experience in backend development. Backend Expertise: Strong skills in backend technologies, including API design, database systems, and server-side frameworks (e.g., Python). AI/ML Knowledge: Understanding of machine learning principles and experience integrating AI models (especially LLMs) into production systems. Familiarity with tools like LangChain or LlamaIndex is a … major tech companies and successful startups, including IPOs and acquisitions. Meaningful Impact: Help organizations tackle growing cybersecurity risks—work that contributes to safer digital environments for everyone. AI Software Engineer | Python | AWS | Kubernetes | CI/CD | LLM | LangChain | UK, Remote More ❯

Lead Software Engineer - Cloud & Data Orchestration Hybrid (1-2 days/week in office) | £140k+ Package | Security-Cleared or Security Clearable required Location: London | Sector: Intelligence, Analytics & Secure Data | Process: 3 stages Our client is a mission-driven consultancy delivering high-impact intelligence, research, and technical services to governments and private sector clients globally and the brand are well … known for making real-world difference. As we continue to expand, we're hiring a Lead Software Engineer/Founding Engineer to take the reins of a specialist engineering unit delivering microservice-based cloud and data solutions at scale. This is a hands-on technical leadership role where you'll work closely with the CTO, shape architecture and … Collaborating with a multidisciplinary group including intelligence analysts, researchers, and domain specialists Supporting clients working in highly sensitive and secure environments Ideal Background Senior/Lead/Founding Software Engineer, startup/hands on CTO, or Lead Architect experience, ideally in cloud-native or high-scale data environments Deep experience with Software Engineering, cloud deployments (especially AWS), and orchestration More ❯

Python Software Engineer, Python, AWS | Python, TDD & BDD, Monitoring | Household Name | £650 - 750pd Outside IR35 | 6-month contract | Fully Remote (UK) Opportunity: We're supporting a fast-moving client with national reach, that needs a Python Software Engineer Contractor with strong experience across Python & AWS. This is a freelance role within a tech … driven team – Where you’ll be the subject matter expert, designing, implementing, and managing software, platforms and more. What You'll Be Doing as a Python Software Engineer, Python, AWS | Python, TDD & BDD, Monitoring | £650 - 750pd Outside IR35 | 6-month contract | Fully Remote (UK) Design and deploy scalable, high-performance software aligned with long-term business … IT) to troubleshoot and enhance system performance. Maintain clear documentation for configurations, procedures, and troubleshooting. Ensure software meets design goals: performance, modularity, reliability, and maintainability. Core Skills for the Python Software Engineer, Python, AWS | Python, TDD & BDD, Monitoring | £650 - 750pd Outside IR35 | 6-month contract | Fully Remote (UK) Strong Python expertise, especially for API development More ❯

Python Engineer - (Front Office) £800-£900/day (Inside IR35) | 6-month rolling contract | Hybrid (3 days in office) | London A major financial player is hiring a hands-on Python engineer to support one of their front office quant focused investment teams. This is a front-office aligned role within technology, partnering directly with quants and … a good fit for someone who enjoys solving data problems, writing robust code, and working in close collaboration with investment teams. What you’ll be doing: Improve and maintain Python-based analytics infrastructure used by quants and PMs Integrate structured datasets (e.g. MSCI), manage schema changes, and ensure data quality Optimise existing model code and build new components in … a clean, maintainable way Enhance data pipelines and tooling using Snowflake, AWS, and Python Work directly with investment professionals to scope and deliver solutions What we’re looking for: Strong Python engineering skills, including use of data libraries like pandas and NumPy Experience working in front office environments Familiarity with data pipelines and cloud infrastructure Pragmatic, detail-oriented More ❯

Backend Software Engineer/Developer (Python AWS AI) London/WFH to £110k Would you like to join a growing and profitable start-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression? As a Backend Software Engineer you will architect and build … policy, with two days in the brand new London offices and flexibility to work from home three days a week. About you: You are an experienced Software Developer/Engineer with a strong knowledge of modern best practice You have strong Python backend development skills, ideally also C# coding skills You have a good knowledge of AWS You … planning abilities You have business acumen and advanced communication/stakeholder management skills Fintech or Financial Services experience preferred What's in it for you: As a Backend Software Engineer you will earn a competitive package including: Salary to £100k Bonus (c20%) Pension (5% employer contribution) 25 days holiday (increasing to 27 after two years and 30 after) Life More ❯

We're seeking an experienced Python Engineer to join a scaling FinTech company revolutionizing the way businesses access finance, supporting their future growth. As a key member of our team, you'll develop cutting-edge technology that empowers businesses and contributes to a more inclusive financial ecosystem. We are all about leveling up the playing field London - ideally … and supportive work environment with team events, social clubs, and a focus on employee well-being. Did I mention their last trip to France? About You: You're a Python expert with a strong foundation in back-end engineering principles. You have a deep understanding of relational databases and experience building, managing, and optimizing them (ideally PostgreSQL) You're More ❯

Senior Software Engineer (Python) Central London – (hybrid) £85-110,000 per annum + equity package, 4 weeks work from anywhere etc. Python, Django, Typescript, React, Kubernetes, AWS Switch Tech Talent are currently partnered with a global SaaS business, hiring for a number of Senior Software Engineers to work on the integration of a newly acquired business into … product. Currently valued at over €1bn after a recent Series-E raise the business are gearing towards IPO. With exciting plans for growth across the globe this Senior Software Engineer role will work on a consumer led product with a huge amount of scalability complexities. As the Senior Software Engineer you will: Contribute to system architecture design and … teams to build an industry leading experience for customers Build world class integrations between the product and 3rd parties through APIs Coach and mentor wider team members Senior Software Engineer requirements: A passion for building customer centric products 5+ years experience building technically complex solutions (ideally with Python/Typescript) You’ll have extensive cloud experience (ideally with More ❯

Opportunity & Requirement Summary Role | Senior Backend Software Engineer (Python & Django) Experience | 5+ years Python development experience Company | Innovative SaaS Software Provider Size | 25+ employees Based | City of London (Office-based) Offer | £60,000 - £90,000 + share options + benefits Detailed Overview Kioni Talent is seeking an experienced Backend Software Engineer to join a rapidly growing … SaaS provider in the City of London. This is an exceptional opportunity to join a dynamic team solving complex technical challenges at scale. As a Backend Engineer, you'll work on the core platform that powers their innovative solution, collaborating with a talented team in a fast-paced environment. What You'll Do Design and implement scalable backend services … using Python and Django Collaborate with the team to architect robust solutions for complex business problems Write clean, maintainable code with comprehensive test coverage Participate in code reviews and contribute to technical decision-making Help shape the technical direction of the platform as the company grows Your Impact Play a key role in scaling the platform to meet growing 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 ownership of individual More ❯

Senior Python Software Engineer/Developer London/WFH to £110k Would you like to join a growing and profitable start-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression? As a Senior Python Software Engineer you will architect and build … policy, with two days in the brand new London offices and flexibility to work from home three days a week. About you: You are an experienced Software Developer/Engineer with a strong knowledge of modern best practice You have strong Python backend development skills, ideally also C# coding skills You have a good knowledge of AWS You … and planning abilities You have business acumen and advanced communication/stakeholder management skills Fintech or Financial Services experience preferred What's in it for you: As a Senior Python Software Engineer you will earn a competitive package including: Salary to £100k Bonus (c20%) Pension (5% employer contribution) 25 days holiday (increasing to 27 after two years and More ❯

Junior Software Engineer (Python) – London (Hybrid, 3 days onsite) – Up to 2 Years' Experience 💼 numi is proud to partner once again with a market-leading asset management firm that’s reimagining the treasury function. Backed by cutting-edge tech and a world-class team, they’re driving innovation to cut financing costs and boost return metrics. We’re … on the hunt for a Junior Software Engineer with a Python focus—whether you're a recent grad or have up to 2 years of hands-on experience. You’ll help streamline client onboarding, build robust integrations, and play a key role in evolving the platform. 🛠 Tech Stack & Methodology Python (Dataclasses, Pandas, Asyncio) PostgreSQL , AWS (ECS, Lambda More ❯

Python Staff Engineer – Cloud & Data Orchestration Hybrid (1–2 days/week in office) | £140k+ Package | Security-Cleared or Security Clearable required Location: London | Sector: Intelligence, Analytics & Secure Data | Process: 3 stages We’re working with a mission-driven consultancy delivering high-impact intelligence, research, and technical services to governments and private sector clients globally. The brand is … well known for making a real-world difference. As they continue to expand, our client is hiring a Lead Staff Engineer/Founding Engineer to take the reins of a specialist engineering unit delivering microservice-based cloud and data solutions at scale. This is a hands-on technical leadership role where you’ll work closely with the CTO … Collaborating with a multidisciplinary group including intelligence analysts, researchers, and domain specialists Supporting clients working in highly sensitive and secure environments Ideal Background Senior/Lead/Founding Software Engineer, startup/hands-on CTO, or Lead Architect experience, ideally in cloud-native or high-scale data environments Deep experience with Python software engineering, cloud deployments (especially AWS More ❯

London based, global trading and investment firm/fintech are now on the hunt for Senior Software Engineer to join and spearhead one of it's growing technology teams. Our client seek a senior profile to gain influence high-class technology trading teams and you will be gain market-leading exposure, both from a engineering and business perspective. It … to this position, and you will get the opportunity to lead a small globally dispersed team. Ideal skills: Full stack engineering, with good back-end and front-end experience Python, C++ React, JavaScript Trading/Front office trading exposure Real time streaming data Data at speed, similar to Market Data technology Linux operating systems Strategy experience Computer Science degree More ❯

Senior Software Engineer – Python/Golang – Hedge Fund. A leading hedge fund is developing a new orchestration platform and are looking for a senior software engineer to play a key role on the build of an enterprise workflow orchestration platform. You will work with a large existing codebase which is written in Golang, to continue to build … and develop the platform. This role is suited to someone with 1-2+ years of Golang experience, who is an expert in another language, i.e. Python, Java, C# etc., who can work autonomously and make a fast impact in a dynamic environment. 10+ years software engineering experience in enterprise environments 1+ years golang experience and understanding of its More ❯

Principal Engineer | AI & Cloud | £85k | Remote (UK) We’re working with a high-growth tech company delivering cutting-edge AI products—and they’re looking for a Principal Engineer to lead the charge in scaling their platforms, defining cloud and AI architecture, and mentoring a talented engineering team. In this hands-on leadership role, you'll set the … technical direction across their full product suite, influence strategic decisions, and stay close to the code. It’s perfect for someone ready to grow beyond a senior engineer/architect role into broader impact and ownership. 🔧 Tech Stack: Cloud: Azure (deep experience required), plus AWS and GCP Languages: Python Infra: Terraform, CI/CD, DevOps AI/ML More ❯

Senior Software Engineer – AI Innovation Lab £110-125,000 + Strong bonus and benefits package. London, hybrid working. We’re partnering exclusively with a leading global SaaS Scaleup business as they continue to build out a newly established Innovation lab, a dedicated team focused on applying AI and machine learning to solve valuable business problems across the organisation. This … across the business to reimagine their systems using modern tools and cloud-native architecture. You’ll be building from the ground up in a greenfield environment, using technologies like Python, TypeScript, FastAPI, AWS and some Azure while contributing to projects that have direct commercial impact. Why this role? → A rare opportunity to work at the forefront of AI in … end, from architecture and prototyping to production → Collaborate directly with business users to shape what gets built The ideal profile: 6+ years’ engineering experience, with strong backend skills (TypeScript, Python) Familiar with modern cloud platforms (AWS or Azure), microservices, and infrastructure as code Comfortable working closely with stakeholders and leading on tech decisions Pragmatic, product-minded and always looking More ❯

Full Stack Engineer | Python | Typescript | React | AWS | Hybrid, London We are seeking a highly skilled Full Stack Engineer to strengthen our internal team and ensure the high quality, reliability, and continuous development of our platform. You’ll join an interdisciplinary team of machine learning experts, engineers, and scientists, working together to advance the frontiers of biological research … foster innovation. We’re looking for passionate innovators who thrive on solving complex technical problems with the potential for global impact. About You You are a strong full stack engineer, proficient in TypeScript or JavaScript and Python. You have experience building high-performance, responsive web applications, and a deep understanding of protocols, REST APIs, WebSockets, and the DOM. You … gatherings A dynamic, collaborative, and mission-driven work environment We are committed to building a diverse and inclusive team. We welcome applicants from all backgrounds and experiences. Full Stack Engineer | Python | Typescript | React | AWS | Hybrid, London More ❯

Lead Software Engineer - Python, TypeScript - £110k - Dropshipping We’re eager to bring in a Lead Engineer with knowledge around system design and architecture to lead the charge in our new growth phase. This is your chance to steer the technical direction of a fast-growing business, working alongside some of the sharpest tech and product minds in … tech strategy, driving the design and delivery of scalable, innovative solutions that power our dropshipping platform. We’re looking for someone with deep expertise in microservice architectures, ideally using Python, TypeScript, React, AWS and K8s with a proven track record of leading cross-functional teams to success. You’ll guide the development of robust systems, make strategic tech choices More ❯

Senior Software Engineer - Python, Django, REST, AWS&GCP - £80,000 - £95,000 Are you passionate about sustainability and innovation? Join a cutting-edge London-based startup that’s revolutionizing how businesses achieve net zero. With £10 million in funding and a growing team of 10 talented engineers, this company is leading the charge in simplifying sustainability through technology. … About the Role As a Software Engineer, you’ll be at the forefront of developing scalable solutions using Python, Django, and REST and more, helping businesses take meaningful steps toward reducing their carbon footprint. What You'll Do Design, build, and maintain robust web applications and services. Collaborate with a tight-knit, high-performing team to deliver impactful … features. Contribute to solving challenging problems in the sustainability space. What We're Looking For We’re seeking mid-level engineers with: 5+ year experience in Python development. No knowledge of frameworks like Django needed but would be advantageous Familiarity with cloud platforms such as Google Cloud Platform (GCP) or AWS (Amazon Web Services) A proactive, problem-solving mindset More ❯

Senior Software Engineer – AI Startup – Up to 120k 🚀🧠 💰 Salary: £70,000 - £120,000 + 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 engineering team within the AI space. The platform is being used … 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! Senior Software Engineer – AI Startup – Up to 120k More ❯

Software Engineer - £70-120k salary range - London Hybrid - AI Workflow Automation Product TDL are working with a Series A, ambitious start-up who are tackling manual admin heavy tasks across Fintech, Insurance and other surrounding sectors via their AI/LLM powered products. They are on the hunt for 2 new Developers to join the London based Engineering … team. You'll ideally have experience using most of the following stack: Backend: Python, Flask/FastAPI Frontend: React with TypeScript Infra: Terraform, GCP/AWS Ideally you'll have at least an interest and have tinkered personally with LLM type projects. Huge bonus if you have commercial experience in this area alongside the above product stack. Engineering team More ❯

Elite global hedge fund is now seeking a number of Computer Science graduates with a minimum of one years commercial experience in Python back end or React front end software development. The client is known for taking the top 1% of global talent for it's opportunities in it's London offices, and developing their careers within the company. … technologist at heart. You will have one years experience at a company of scale and now be wishing to then take your career to the next stage. The right engineer will undertake multiple projects with the first one being to help create, build out and maintain a new greenfield platform for quantitative strategies and front-office tools. The successful … candidate will have the following skills/experience - 1-2 years+ commercial experience with Python, Django, React or Rust experience Strong understanding of OO principles, design patterns, data structures & algorithms Bachelors or Masters Degree in Computer Science or very similar, ideally from a top University Personality and genuine passion in technology Elite bonus culture and starting salaries on offer More ❯

AI Engineer | Natural Language Processing | Large Language Models | LLM | Python | Pytorch | Hybrid, London The Opportunity We are seeking a highly skilled AI Engineer to lead the development of advanced agentic workflows that transform how scientists interact with our platform. You will design and implement autonomous systems capable of navigating complex scientific tasks—such as retrieving scientific data … looking for individuals driven by impact, excited by deep technical challenges, and motivated by the opportunity to shape the future of science and technology. Who You Are Experienced software engineer with expertise in Python, API design, and distributed systems. Skilled in LLM orchestration, with hands-on experience using APIs (e.g. OpenAI, Anthropic) and frameworks like LangChain, LlamaIndex, or … scientific discovery through the application of next-generation AI systems. We are committed to building a diverse and inclusive team and encourage applicants from all backgrounds to apply. AI Engineer | Natural Language Processing | Large Language Models | LLM | Python | Pytorch | Hybrid, London More ❯

class engineering team. Their HQ is in Central London, so you can choose to be based remote-first or hybrid, although proximity to London would be advantageous. As Software Engineer you will: Build AI-first features: Design and ship cutting-edge platform features using personalisation, LLMs, recommender systems, and reinforcement learning. Work across the stack: Own features end-to … end with React (TypeScript) and Python (FastAPI), blending UX and ML into production-ready code. Move fast with the latest tools: Leverage modern AI dev tools (Cursor, Windsurf) to experiment, prototype, and launch quickly. Be a collaborative, growth-minded engineer: Ship clean, tested code, embrace peer reviews, and contribute across design, product, and ML. We want to hear … Proven industry impact: 3+ years building products in fast-paced or startup environments, with an eye for quality and scale. Full-stack fluency: Skilled in React/TypeScript and Python, with experience deploying on GCP, AWS, or Azure. Real-world AI/ML experience: Delivered AI-driven features to users and hungry to stay ahead of the latest innovations. More ❯

Backend Engineer, Python, Go, Cloud Infrastructure | AWS, Full-stack mindset, TypeScript | AI, B2B Scale-up | £550 - 650pd Outside IR35 | 6-month contract | London, Hybrid Our client is building industry leading AI, and they are looking for exceptional Backend Python Engineers at a Senior/Principle level. Key requirements are: Proven Python or Go experience +4 years … and over 6+ years in total commercial experience in Software Ability and comfort in working as a generalist Software engineer - across the Full stack. Picking up languages and challenges whenever needed. Always being curious. Excellent Cloud and Data Infrastructure experience Experience working on big tech platforms, as well as start-up/scale-up engineering challenges Strong API exposure … designing and refining for scale If you wish to apply for the Backend Engineer, Python, Go, Cloud Infrastructure | AWS, Full-stack mindset, TypeScript | AI, B2B Scale-up | £550 - 650pd Outside IR35 | 6-month contract | London, Hybrid Contract role. Please apply HERE and we will reach out to you if it's a good fit. More ❯