Senior Software Engineer Fullstack Python React Jobs in UK

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Medical Device Software Engineer Real Time, C/C++, AI

A leading medical technology company in the UK is seeking a Software Engineer to design and develop software for safety-critical medical devices. The ideal candidate will have 5+ years in software development, proficiency in C/C++ and Python, and experience in highly regulated industries. This full-time position ...

Lead Software Engineer — AI, Data & Cloud Delivery

A technology firm in Greater London is seeking a Lead Software Engineer to guide technical project delivery and ensure the creation of high-quality, scalable solutions. You will lead software development projects, manage delivery teams, and build strong client relationships. The ideal candidate will have extensi ...

Senior ML QA Engineer Test Automation & CI/CD

A leading AI compute company in Bristol is seeking an experienced Software Engineer to design, develop, and maintain a complex ML software stack. Responsibilities include building robust test infrastructure, maintaining CI/CD pipelines, and mentoring junior engineers. The ideal candidate will have strong profici ...

Geospatial Full Stack Engineer Hybrid

A technology company is seeking a Software Engineer (Full stack) in London, U.K. This role requires 3 years of experience with a focus on web development and REST APIs, ideally with TypeScript/JavaScript or Python frameworks. Candidates should possess a BSc in Software Engineering or a related discipline. The po ...

Market Data Developer Global Crypto Trading (C++)

A trading firm in Greater London is seeking a Software Engineer, Market Data to develop full-stack software systems supporting global trading operations. The ideal candidate will have significant expertise in C++ and Python, with experience designing high-performance applications. Responsibilities include workin ...

Senior MLQA Engineer: Test Automation & CI/CD Architect

A leading AI technology company in Bristol is seeking an experienced Software Engineer to design and maintain robust infrastructure for their machine learning software stack. This role emphasizes quality, testability, and collaboration across teams while working with cutting-edge AI technology. Candidates should ...

VP Lead Software Engineer, Margin Tech — Hybrid

Citigroup Inc. is hiring a Lead Software Engineer to join their global technology team in London. You'll be working on complex problems with a focus on delivering robust software solutions. Candidates should have significant software development experience and proficiency in languages such as Java and Python. Th ...

Lead .NET Engineer — Hybrid, SME & Technical Leadership

The UK Hydrographic Office seeks an experienced Lead Technical Software Engineer to provide technical leadership and drive excellence within the .NET ecosystem. This role is based in Taunton, UK, offering a hybrid working model; four days in the office and one day remote. Responsibilities include coding, maintai ...

Senior Cloud Simulation Engineer

Icehouseventures is looking for a Software Engineer for the Simulation Technology team in London. In this full-time role, you'll evolve a core component of the simulation platform used to develop Wayve's driving intelligence. Responsibilities include owning key performance indicators and implementing production ...

Lead Real Time Embedded & Control Software Engineer

AB Dynamics is looking for a Lead Embedded & Control Software Engineer to design and develop code for automotive test systems. You will collaborate with cross-functional teams to ensure high-quality software delivery. Your responsibilities will include defining software architectures, ensuring compliance with in ...

Cloud & Integrations Engineer (Remote UK)

NedGraphics, Inc. is hiring a Software Engineer (Cloud & Integrations) to work remotely from the UK. You will join a scrum team to build and maintain cloud products, design serverless architectures on AWS, and develop secure APIs. The ideal candidate has over 3 years of software development experience, strong ex ...

Wear OS Core Platform Engineer — Android & Embedded

Google Inc. is seeking a Software Engineer III for the Wear Core Platform. In this role, you will contribute to Android-powered smartwatches through full-stack development. Candidates should have a Bachelor's degree and 2 years of software development experience in languages like Java, C/C++, and Python. ...

Technical Lead

Head of Engineering / Senior Engineering Manager (Go / GCP)£80,000 - £90,000 + benefits London - 1-2 days per week onsite (potential flexibility for the right person) We’re working with a growing AI/infrastructure technology business building cutting-edge software used across critical in ...

Software Engineer, Data in London Kharon

Software Engineer, Data London, United Kingdom Posted 10 months ago Tech stack Django FastAPI Python ecosystem Flask NumPy REST Requirements Authorization to work in your country of r ...

DevOps Engineer

Senior Full stack Engineer who is passionate about continuous innovation. Having at least 6+years of demonstrable development experience in React JS and Node JS together with working knowledge of LINUX, database, application deployment, version control, microservices would be key for individual’ success in ...

Lead Software Engineer SaaS, Remote & Hands on Leader

A leading technology recruitment agency is seeking a Lead Software Engineer for a growing SaaS business in the UK. This role involves developing innovative products and requires experience with Ruby on Rails and Python. Ideal candidates will have a hands-on leadership background and advocate for software enginee ...

Staff Software Engineer, Code Search (Remote)

GitHub is hiring a Staff Software Engineer to develop and scale Blackbird, their code search engine, primarily for AI-based features. This remote role involves designing and implementing APIs, technical leadership, and maintaining executional excellence across teams. Candidates should have strong experience in s ...

FinTech Full Stack Engineer – TS/Node/React, London Hybrid

A progressive technology company based in London is seeking a Mid-Senior Full Stack Engineer. You will be responsible for designing and scaling the backbone of their platform while taking full ownership of your work. Strong experience with TypeScript, Node, Express, and React is required, with a focus on FinTech ...

C# Engineer Horizon

Software Engineer C#, .NET, SQL, API integration, Kubernetes, Docker.Dublin, IrelandPerm Role: €70,000 - €90,000 Harrington Starr has partnered with a Global Financial Technology company, seeking to hire a Mid - Senior level Software Engineer, with experience developing highly s ...

Senior C#/.NET Engineer Scalable FinTech (Hybrid)

Software Engineer C#, .NET, SQL, API integration, Kubernetes, Docker.Dublin, IrelandPerm Role: €70,000 - €90,000 Harrington Starr has partnered with a Global Financial Technology company, seeking to hire a Mid - Senior level Software Engineer, with experience developingh ...

Founding Python Backend Engineer — Real Time AI Analytics

A startup focused on AI infrastructure in London is seeking a Founding Python Back-End Engineer. In this role, you will build core infrastructure for processing real-time data streams and develop APIs for analytics. Ideal candidates will have 3+ years of experience in backend systems, strong Python skills, and a ...

Flask Python Engineer (REST, Docker, AWS, CI/CD)

A tech recruitment firm in the United Kingdom is seeking a skilled Python Developer to design and maintain web applications using Flask. The ideal candidate will have at least 1.5 years of experience in web development, a strong background in AWS, and proficiency in Git and Docker. You will collaborate with team ...

Front Office Python Trading Engineer – Real Time Systems

A global Trading firm is seeking a Front Office Developer skilled in Python to enhance trading technology. In this role, you will collaborate directly with Traders to create high-performance systems and tools that improve decision-making in trading. Ideal candidates will have significant experience in software e ...

Software Engineer/Quant Developer (FULLY REMOTE) Up to £200k + Bonus London

Overview Software Engineer/Quant Developer (Python) – Fully remote, London-based role. Salary up to £200,000 P/A + bonus (DOE). Client: Performance Software Scale Up. Responsibilities Join a team of elite software engineers to build next-generation performance software platfor ...

.NET Developer

.NET Developer, C# - Global Technology Brand - Chichester (Tech stack: .NET Developer, .NET 9, ASP.NET, C#, WPF, React, Angular 19, Microservices, Azure, Web API 2, Entity Framework, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client's fascinating sto ...

.NET Developer Ulverston

.NET Developer - World Class Entertainment Company - Ulverston, Cumbria (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Blazor, JavaScript, React, Microservices, Azure, ASP.NET Core Web API, Agile, Azure SQL, Programmer, Full Stack Engineer, Architect, .NET Developer) </ ...

.NET Developer Ulverston

.NET Developer - World Class Entertainment Company - Ulverston, Cumbria (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Blazor, JavaScript, React, Microservices, Azure, ASP.NET Core Web API, Agile, Azure SQL, Programmer, Full Stack Engineer, Architect, .NET Dev ...

.Net Engineer

They’re looking for a strong .NET Engineer to join a highly collaborative engineering team working on scalable platforms, modern cloud architecture, and genuinely interesting technical challenges. This is the kind of environment where engineers are trusted to solve problems properly — not just chur ...

GenAI Managing Consultant

GenAI Full Stack Engineer - Managing Consultant Salary: £80,000 - £88,500 pa + £8,000 Bonus plus benefits, perks and healthcare options Job Type: Permanent - Hybrid / 2 x days per week - Travel to client site <stron ...

Firmware Test Automation Engineer (Python, Robot, CI/CD)

Rubicon Consulting is looking for a Test Automation Engineer on a 12-month contract in Northern Ireland. The candidate will work closely with the Scrum team to create and execute both manual and automated test solutions. Required skills include extensive experience as a firmware test engineer, familiarity with P ...

Python Desk developer | Energy Trading Desk | £150k | Hybrid, LDN | Perm

Python Engineer to work directly on the trading desk for a Global Energy Trading Firm is scaling aggressively into new‑energy markets . They’re looking for a Python engineer who has experience sitting directly within the front office , embedded with traders, and build tools that influence rea ...

Python Desk developer | Energy Trading Desk | £800/Day Inside | Hybrid, LDN | 6 Months Rolling

Python Engineer to work directly on the trading desk for a Global Energy Trading Firm is scaling aggressively into new‑energy markets . They’re looking for a Python engineer who has experience sitting directly within the front office , embedded with traders, and build tools that influence rea ...

Distributed Systems Engineer: ML Infra & R&D (Hybrid)

A leading technology recruitment firm in the UK is seeking a Distributed Systems Software Engineer, offering a salary up to £190k plus bonus. This hybrid position involves designing and developing scalable distributed systems. Candidates should have experience in functional programming languages such as Rust or ...

Automotive System & Software Test Engineer (Hybrid, 6mo)

JAM Recruitment Ltd is seeking a System / Software Test Engineer for a 6-month contract based in Nuneaton, UK. The role involves software testing related to diagnostic equipment. Ideal candidates will have experience in Diagnostics / ISO14229, Test Automation, CAN logging, and proficiency in Python and CAPL scri ...

Machine Learning Software Engineer Full Stack (LLM) in London Aquent

Machine Learning Software Engineer - Full Stack (LLM) London, United Kingdom Bachelor’s degree in Computer Science, Computer Engineering, or a related technical background. Experience Backend software engineering experience in Python. Responsibilities and Requirement ...

ML Full Stack Engineer: Python Backend & AI Systems

Machine Learning Software Engineer - Full Stack (LLM) London, United Kingdom Bachelor’s degree in Computer Science, Computer Engineering, or a related technical background. Experience Backend software engineering experience in Python. Responsibilities and Requirement ...

Climate Tech Software Engineer — Hybrid London (Impact)

A climate tech startup in London is seeking a Software Engineer to drive the transition to a cleaner energy system. You will develop software that optimizes energy usage and contribute to machine learning models. Ideal candidates are curious and passionate about tackling climate change, with a strong proficiency ...

Senior Full Stack Engineer (UK)

About the Role: We're looking for a Senior Full Stack Engineer who thinks AI-first, builds with modern tooling, and brings strong React/TypeScript front-end instincts alongside solid back-end capability. What You’ll Own: Design and build full stack features end-to-end, fro ...

Senior Product Engineer AI Driven Marketplace, Ownership

yhangry, the UK's largest private chef marketplace, is seeking a Senior Product Engineer to join our engineering team. In this founding-engineer role, you'll own significant parts of the product and directly impact business metrics such as conversion and revenue. We're looking for someone with over 3 years of ex ...

Lead .NET Software Engineer – Hybrid, Manchester

A certified B Corp in Manchester is seeking a Senior/Lead .NET Software Developer to lead a team and shape the technology platform. This role involves extensive work with C#, .NET, SQL, and Azure, along with modern front-end technologies like React and JavaScript. Offering a salary up to £70k along with excellen ...

NL 26 028 Principal Software Engineer

Logic is seeking a Principal Software Engineer to join our team in El Segundo, CA. You will join a systems engineering team defining the next generation of space communication systems supporting US Space Force (USSF) satellite communications. You will support Systems Engineering & Integration (SE&I ...

Full Stack Engineer Global Fintech (Joining AI Innovation Team) £80k + bonus TypeScript/ [...]

I am recruiting for a Full-Stack Engineer for an AI Innovation Team for a leading global fintech. This brand new team (embedded within a major global fintech powerhouse) will be building a brand new AI Platform (AI‑driven compliance technology for a platform used across nearly 30 markets) <p ...

Full Stack Engineer

Full Stack Engineer (Founding Team) We are representing an early-stage AI technology startup. After successfully validating their core technology with a high-performance prototype, they are looking for their first core engineering hire to lead the transition to a flagship S ...

Product Engineer (full stack)

Join a fast-growing, VC-backed startup on a mission to modernise workflows for the global consulting industry. Backed by leading founders and investors, this organisation is dedicated to building next-generation AI tools that empower consultants by automating manual, repetitive tasks and enabling more meaningful ...

PRODUCT ENGINEER I

Join a fast-growing, VC-backed startup on a mission to modernise workflows for the global consulting industry. Backed by leading founders and investors, this organisation is dedicated to building next-generation AI tools that empower consultants by automating manual, repetitive tasks and enabling more meaningful ...

Product Engineer (full stack)

Join a fast-growing, VC-backed startup on a mission to modernise workflows for the global consulting industry. Backed by leading founders and investors, this organisation is dedicated to building next-generation AI tools that empower consultants by automating manual, repetitive tasks and enabling more meaningful ...

PRODUCT ENGINEER I

Join a fast-growing, VC-backed startup on a mission to modernise workflows for the global consulting industry. Backed by leading founders and investors, this organisation is dedicated to building next-generation AI tools that empower consultants by automating manual, repetitive tasks and enabling more meaningful ...

Senior Frontend Engineer / Full Stack Product Engineer Energy

About the RoleOur client is hiring a Frontend Engineer / Full Stack Product Engineer to help build the software that their customers interact with directly, as they continue to scale their product and technology function. We have already recruited 3 individuals to the company and are pleased to be suppor ...

AI Engineer

Type: Permanent Salary: £200,000 + generous equity package Interview Process: 2-4 stages I’m hiring for two YC-backed startups building foundational AI infrastructure - one focused on advancing reasoning capabilities, the other on streamlining how teams deploy a ...

Lead Python Architect & Cross‑Team Delivery Leader

Partnerize is seeking a Lead Python Engineer to produce clean, testable designs, lead software development initiatives, and act as a technical expert in their domain. Responsibilities include problem solving, leading a cross-functional team, and contributing actively to ceremonies. Ideal candidates should have e ...

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    Senior Software Engineer Fullstack Python React Jobs in United Kingdom Job Search Guide, Trends and Insights