851 to 875 of 1,023 Python Jobs in London

backend career who’s excited to learn, ship, and grow. Key responsibilities: Build and maintain server-side logic using modern backend frameworks (e.g. Node.js, Python, Go) Work with APIs — designing, integrating, and maintaining RESTful endpoints Support database design and optimisation (e.g. PostgreSQL, MongoDB) Collaborate with front-end and product teams … looking for: 1–2 years of experience (including internships or personal projects) in backend development Proficiency in at least one backend language (Node.js, Python, Go, etc.) Basic understanding of how REST APIs work Familiarity with databases and version control (e.g. Git) Strong problem-solving mindset and attention to detail ...

define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch. Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous improvement. Collaborate with cross-functional … equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure (Google Cloud ...

define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch. Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous improvement. Collaborate with cross-functional … equivalent hands-on experience. 7+ years' experience in backend software development, including several years in a senior or principal-level engineering role. Expertise in Python (or a similar backend language), with proven experience designing distributed systems, APIs, and microservices at scale. Deep understanding of software architecture, cloud infrastructure (Google Cloud ...

influence the technical strategy for the platform Requirements 4-6+ years of building production data pipelines with measurable business impact Deep expertise in Python, SQL, and pandas , with experience in memory optimisation and vectorisation Experience managing messy real-world data and maintaining high data quality standards Strong code quality … solving skills, attention to detail, and ability to work independently Experience with workflow orchestration (Prefect, Airflow, Dagster), cloud data warehouses (BigQuery, Snowflake), or backend Python frameworks (Django, FastAPI) is a plus Benefits 25 days annual leave plus bank holidays Meaningful equity options as the first engineering hire Flexible working ...

Role: Software Developer (Python) - Up to £140,000 + Bonus + Package Salary: Up to £140,000 + Bonus + Package Location: London (Hybrid Working) Skills: Python as a main language This firm is an elite tech firm with high standards who have previously set tech world records. They ...

Role Partner-level founding role. You'll: Design system architecture for scaling from pilots to thousands of sites Build production infrastructure: Python (FastAPI/Django), PostgreSQL, AWS, CI/CD, Docker, Kubernetes Ship AI/LLM features: LangChain, LlamaIndex, prompt engineering, vector databases, OCR Own technical direction and architectural decisions … Work directly with founders on technical culture and product direction What we're looking for Systems depth: 5+ years building production systems. Python, PostgreSQL, AWS infrastructure, DevOps (CI/CD, Docker, K8s). You've architected distributed systems at scale. AI/LLM experience: Shipped AI features to production. Hands ...

roles and help you get a step ahead. Learn the Command Line (*1.5 weeks) Learn Git & GitHub (*1.5 weeks) Learn JavaScript (*1.5 weeks) Learn Python 3 (*1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet. Therefore, this is an essential addition language in building your … programming and development foundation. Python is a highly versatile programming language and due to its relatively “easy to understand” commands now one of the most common programming languages used. You can use it for both small and complex tasks, and it is used across many different industries broadening your scope ...

performance and develop data-driven insights. Collaborate with internal teams and present findings to C-suite leaders in a compelling manner. Utilise SQL and Python to produce complex analyses that address critical business questions. Drive growth for some of the world's largest advertisers by delivering bespoke insights and recommendations. … following qualifications: Basic Qualifications: Bachelor's degree in business, finance, data science, or a related field. Advanced skills in SQL and proficiency in Python (or R). Ability to convey complex analyses into actionable insights for diverse stakeholders. Fluency in French Preferred Qualifications: Experience with consulting or advertising agencies. Understanding ...

customers Shape our engineering culture and long-term technical direction What You've Done 4+ years of professional software engineering experience Deep expertise in Python and a track record of owning systems end-to-end Experience with cloud infrastructure and infrastructure as code Shipped and operated production systems Comfortable with … used, not just how they’re built Our Tech Stack We're building with tools that both humans and AI love: Frontend: React Backend: Python and Fast API Cloud: AWS And always on the lookout for what's next! What We Offer Competitive salary + meaningful equity In-person culture ...

Contract Python Developer (Django) – Immediate Start We’re working with a fast-growing client that’s expanding rapidly following recent funding and acquisitions. They’re looking for experienced backend Python contractors to join the team on an immediate basis. This role is focused on Python and Django development. … collaborative delivery. Key details: Rate: £400 per day (Outside IR35) Location: Hybrid – 1 day per week in London Requirements: Strong commercial experience with Python and Django Backend-focused background with solid understanding of ORM, APIs, and code quality UK-based and able to attend the weekly London office ...

Job Title: AI Engineer Location: West London, UK (Hybrid Working) Type: Contract (Inside IR35) Duration: 12 Months Brief: The team is committed to advancing AI-driven innovations in two key areas: developing AI-powered predictive ...

join a high performing technology team supporting one of their key trading groups. The team builds advanced analytics platforms and internal tools using Python on the backend, with modern React and TypeScript driven frontends that help traders analyse markets, manage risk, and make informed investment decisions. In this role … technologists to design and deliver new trading and research applications. Projects span the full development lifecycle, from backend services and data processing in Python through to user facing interfaces built with React and TypeScript. This is a hands on position offering real ownership and responsibility, suited to someone ...

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 … 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 ...

stack trading apps. You would be on a specialised desk and partnering with traders and researchers, helping to modernise and augment their infrastructure. Stack: Python, React/Typescript, AWS, This firm offer a scientifically driven culture, with tonnes of academic and open source resources to leverage, while offering industry leading ...

Senior Full Stack Engineer – AI Startup – Up to 150k 🚀🧠 💰 Salary: £80,000 - £150,000 + meaningful equity 🏙️ Location : London, hybrid 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) 📈 Team size: 27 heads Our y-combinator backend client are building an elite engineering team within the AI space. ...

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 ...

Developer/Engineer (Python Django React) Remote UK to £80k Do you have strong Python and Django skills? You could be progressing your career at a tech scale-up, with recent investment, that is helping vulnerable people to reclaim money due to them via irresponsible lending. As a Web Developer ...

reliability, latency, and real-world feedback loops matter. What You'll Do Lead the design and production integration of ML components into a live, Python-based trading system Take early ML research/prototypes and turn them into reliable production models and services Build robust training and evaluation pipelines with … software engineers on integration, deployment, performance, and operational reliability Troubleshoot and resolve production issues quickly during key market hours when needed Essential Skills Strong Python developer (min. 5+ years professional Python experience) Demonstrable experience taking ML models from prototype to production (deployment, monitoring, and ongoing operation) Strong understanding of validation ...

Staff Engineer (Python) – IC4 📍 Hybrid - London OR Manchester 💰 £90,000 - 110,000 We’re looking for a Staff Engineer (IC4) to help shape the technical direction of a fast-growing, product-led engineering organisation. This is a senior individual contributor role with platform-level impact . You’ll work primarily … Python , contributing to the design and evolution of backend services and data-heavy systems, with some React exposure where needed to unblock teams and improve end-to-end delivery. What you’ll be doing Setting architectural direction across multiple services and teams Leading complex, cross-cutting technical initiatives (scalability, reliability ...

services, and data flows, while also contributing to the frontend where needed. What you’ll do Design and build backend services and APIs in Python, typically using FastAPI or similar frameworks Build and maintain frontend features using React and Next.js Own data models, background workers, async processing, and system behaviour … practical, hands on way Collaborate closely with other engineers to ship production features quickly and safely How the stack looks in practice Python for backend services and APIs FastAPI or similar modern Python frameworks React with Next.js on the frontend Relational databases with Redis for caching and background jobs Async ...

high-growth fintech scale-up working with top-tier global financial institutions. The role involves building and scaling backend systems in Node.js and Python, deploying on AWS (Lambda, DynamoDB, PostgreSQL), and collaborating closely across engineering, product, and customer teams. Ideal Candidate: Proven experience with backend/fullstack development using Node.js … Python, and AWS serverless architecture Strong database design skills (PostgreSQL, DynamoDB, Elasticsearch) Familiarity with frontend frameworks like Vue or React Comfortable mentoring developers and influencing technical direction Experience in financial services or a data-heavy B2B environment is a plus Tech Stack: Node.js, Python, AWS (Lambda, DynamoDB, CloudWatch, CloudFormation), PostgreSQL ...

Backend Engineer (Contract) | Java/Rust (Primary) | React (Secondary) | Ruby or Python (Exposure) | Fully Remote (UK/EU-based) | £550-650/day | Outside IR35 | 12-month contract The Opportunity We’re supporting a fast-scaling, globally distributed tech business that is evolving its backend architecture and investing heavily … platform is heading, though Java remains important. On the frontend, the team works with React, and there is existing exposure to Ruby and Python, where a working, mid-level understanding is beneficial rather than core. This is a high-impact, long-term contract within an experienced engineering team, ideal ...

Technical Lead | Product Technical Lead | Tech Lead | Product Manager | AI/Data Science | Python | FastAPI | SaaS | Hybrid 2 days a week | Central London | £85,000 + 15% bonus I am currently working with a brilliant consultancy with deep expertise in their field of Data and Cyber Security solutions, predominantly with … utilise the product to its fullest. Key skills Strong software engineering skills, delivering end-to-end software products. Highly product orientated. Highly skilled in Python development, with knowledge of FastAPI framework. Good databases knowledge with schema design and SQL. Some front-end development preferably TypeScript & React is highly desirable. Experience ...

agentic workflows, voice + messaging). You’ll operate with high autonomy and strong product ownership. Key responsibilities Build and scale backend services in Python (AWS) Own production integrations (telephony/voice, WhatsApp, email) Develop and improve LLM agent workflows (frameworks a plus) Implement reliability, monitoring, evaluation and QA practices … scoping, delivery, deployment and iteration Collaborate directly with founders on product and technical direction Requirements 5-6+ years commercial software engineering experience (Python) Strong AWS experience (production systems) Real exposure to AI/LLM systems in industry (not purely academic) Independent, proactive, high ownership mindset Strong communication and stakeholder ...

Senior Backend Python Engineer – London 📍 London · In-person 💰 Very competitive base + equity A well-funded Series A startup in London is building AI agents that help internal teams focus on meaningful work by automating repetitive, admin-heavy finance tasks . These are real products with real users, designed … building one of the fastest-moving startups in London 🙌 🛠 What You’ll Be Doing Build core backend services, APIs, and distributed systems in Python Design architecture, data flows, and infrastructure foundations Own production systems and iterate quickly based on real user feedback Work closely with the leadership team on technical ...