Senior Software Engineer Fullstack Python React Jobs in UK

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Senior UI Developer £165k + Bonus London

Title – Senior/Lead UI Developer Client – Fintech Start-Up (Trading) Rate - Up to £165,000 + Bonus Location – London/Hybrid About the Company: Our client is a rapidly growing fintech start-up building next-generation technol ...

Production ML Engineer — Real World AI for Public Sector

A leading AI company in Greater London is seeking a Machine Learning Engineer to deliver impactful AI solutions for diverse clients, including government sectors. You will build production-grade ML software and collaborate with cross-functional teams to ensure timely delivery. Strong Python skills and experience ...

Full Stack Software Engineer – Help Scale a £100M Platform

A leading technology platform in London is seeking a bright, driven Full-Stack Software Engineer to tackle complex problems and build scalable platforms. You will work with a broad range of technologies, improve user experiences, and participate in high-quality code reviews. Ideal candidates are experienced in P ...

High Speed Validation Engineer Lab Driven, 10G+

A leading technology company in Bristol is seeking a High-Speed Validation Engineer to validate next-generation semiconductor devices. The ideal candidate will have strong lab-based testing skills and at least 6 years of relevant experience. Responsibilities include designing validation solutions, generating aut ...

Product Engineer: Fintech for Fertility Financing

A growing fintech company in London seeks a Product Engineer to join a mission-driven team focusing on insurance-backed financing for IVF. You will be responsible for designing and building scalable software for financial processes, working collaboratively across various teams to enhance product features using m ...

Remote Cloud & Integration Engineer

A leading university in the UK is seeking a Software Engineer to develop and enhance middleware integration solutions. This role primarily operates remotely, requiring minimal travel. Essential qualifications include proficiency in TypeScript and Python, experience in a DevOps environment, and a solid understand ...

Senior Robotics & Planning Engineer: Multi Agent Autonomy

A UK-based deep defence-tech startup is seeking a Robotics Engineer to develop multi-agent planning algorithms and software for robotic platforms in Cambridge. The ideal candidate will have an advanced degree in Robotics or Computer Science, expertise in reinforcement learning, and strong C++ and Python developm ...

Senior ML Engineer for Impactful AI Systems (Hybrid)

A leading AI consultancy in Bristol is seeking a Machine Learning Engineer to design and deploy production-grade software systems. The role involves collaborating with cross-functional teams to solve high-impact problems in defence and national security. Ideal candidates will have experience with machine learnin ...

Staff Software Engineer: AI Driven Hardware Automation & SRE

A leading semiconductor IP company in Kings Langley seeks a talented software engineer to develop and maintain innovative automation systems for GPU and AI hardware IP workflows. This role involves collaborating on automation systems, integrating hardware EDA tools, and writing orchestrated workflows. Ideal cand ...

Trading Systems Engineer: Build Resilient, High Impact Market Tech

A diversified trading firm is seeking a Trading Systems Engineer to join their Cumberland team in London. This role involves working alongside trading, infrastructure, and software development teams to address complex technical challenges. Candidates should have a Bachelor’s degree in STEM, 2+ years of financial ...

Automation & IT Systems Engineer (Hybrid, Bristol)

A growing software engineering company in Bristol is seeking an IT System Support and Automation Engineer to join their team. This hybrid role involves developing Python scripts for automation, providing technical support, and improving operational efficiency. The ideal candidate will have experience with variou ...

Low Latency Platform SRE Observability & Production

A leading hedge fund in London is seeking a Low Latency Trading & Observability SRE / Platform Engineer to join their core Production Engineering team. The ideal candidate will ensure the reliability and performance of critical trading systems, lead incident management, and implement software solutions using lan ...

DevOps Engineer — Automate Deployments & Elevate Experience

A leading technology company in the UK is seeking a skilled DevOps Engineer responsible for deploying product updates and addressing technical issues. Candidates should have strong experience in software engineering with proficiency in Ruby or Python and a solid understanding of databases. The role involves impl ...

Senior Full Stack Engineer — Tech Leader & Architect

A leading consultancy firm in the UK is seeking a Software Engineer to contribute to various exciting projects, particularly Python-focused. The ideal candidate will have a passion for coding, experience in cloud environments like AWS or Azure, and the ability to provide technical leadership while working collab ...

Lead MLOps Engineer — Scalable AI for Banking

A leading financial services firm based in Greater London is seeking a Lead Software Engineer - MLOps to design and deploy AI/ML solutions. The ideal candidate will have expertise in Java and Python, experience with cloud technologies, and a strong interest in generative AI. Join a collaborative team focused on ...

Senior AI Security Engineer

A leading AI research company seeks a Security Engineer to secure large-scale AI systems. Ideal candidates have extensive software engineering experience and strong skills in Python or other systems languages. You will design secure infrastructure and workflows, mentor team members, and drive security initiative ...

Cyber & Software Engineering Placement

A leading technology firm in Cheltenham is offering an Industrial Placement Software Engineer role. You will be involved in writing clean code, supporting system design, and collaborating within an Agile team. Candidates should be studying a relevant degree and have skills in Java and Python. Benefits include fl ...

Staff Engineer: Cloud & Data Platform Architect

A biotech research platform is seeking a Staff Engineer to own and evolve technical infrastructure, manage cloud operations, and develop production-ready APIs. The ideal candidate will have over 5 years of software engineering experience, proficiency in Python and Docker, and expertise in cloud platforms like AW ...

AI Enabled Cheminformatics Engineer for Drug Design

A pharmaceutical technology company in the UK is seeking a detail-oriented Cheminformatics Engineer to enhance productivity in drug design. The role includes developing cutting-edge AI methods and collaborating with diverse teams. Candidates should have a Master's or PhD in Computational Chemistry or AI, strong ...

Lead Full Stack Engineer Public Sector, Hybrid

A digital transformation consultancy in the UK is seeking a Lead Full Stack Software Engineer to take overall technical ownership of high-quality, scalable digital solutions. The role involves leading Engineering teams, collaborating with clients, and driving innovation across services. Required skills include e ...

Staff Data Software Engineer: Scale ML Pipelines (Hybrid)

A global connected car services provider is looking for a Staff Software Engineer to lead technical initiatives in data science products. The role focuses on architecting and implementing data solutions, enhancing existing services, and ensuring system reliability. Candidates should have extensive experience in ...

Senior Cloud Platform Engineer (AWS/Azure, Terraform)

PolyAI in Greater London is looking for a Cloud Infrastructure Engineer to design and manage scalable cloud architectures on AWS and Azure. The ideal candidate has 5+ years of experience, strong Python skills, and a background in software engineering. Responsibilities include optimizing resources, improving deve ...

Staff Backend Engineer, Regulatory & Data Systems

Visa is seeking a Staff Software Engineer for its Regulatory & Partner Reporting team in Greater London, United Kingdom. The role focuses on building reliable backend systems for regulatory reporting. Ideal candidates should possess strong backend engineering skills, particularly in Java or Python, alongside ext ...

HPC Research Software Engineer for Cosmology Codes

Durham University is seeking a Research Software Engineer to join their High Performance Computing team within the Department of Physics. The role involves optimizing scientific codes for cosmology and particle physics research, utilizing C/C++ and Python. Candidates should have experience in code performance im ...

Full Stack Engineer AI Powered Workflows, London (Onsite)

A leading recruitment firm is seeking a Full Stack Engineer to join their product-focused team in London. This hands-on role involves designing software for complex workflows, utilizing TypeScript for frontend development and Python for backend services. The ideal candidate will have strong experience with moder ...

Senior ML Engineer, Perception & Autonomy

A leading electric vehicle manufacturer in Greater London seeks an experienced Machine Learning Engineer. You will develop advanced algorithms for self-driving features and collaborate with various teams. Ideal candidates have extensive experience in machine learning systems, a strong software engineering backgr ...

DevOps Engineer: Scalable, Secure FinTech Infra

Apache Associates is seeking a talented DevOps Engineer in London, UK. Play a pivotal role in designing and deploying scalable DevOps solutions while working across various data platforms and orchestration frameworks. Ideal candidates have a strong software engineering background with proficiency in Python, Java ...

Sandbox Service Engineer — Build Secure AI Compute Stack

A leading AI company in Greater London is seeking a Software Engineer for their Sandbox Service. The role involves building scalable systems that provide controlled access to computational environments. Candidates should have expertise in Rust, C++, or Go, familiarity with Python, and experience in virtualizatio ...

Staff Infrastructure Engineer in London Sotheby's

Principal Software Engineer, Nifty Gateway 108 E 16th Street, New York, NY 10003 Qualifications Deployment and infrastructure tooling Experience with one or more programming languages including but not limited to: Go, Node.js, Python, Scala, or Java Experienc ...

Developer Experience Engineer Bazel & Monorepo, Hybrid UK

A leading technology company in the UK is seeking a Software Engineer to join their Developer Experience team. The role involves enhancing developer workflows, optimizing Bazel builds, and managing CI/CD pipelines. Ideal candidates will have over 5 years of experience in Infrastructure Engineering, proficiency i ...

Lead Crypto Software Engineer – Front Office, Low Latency

A boutique digital-asset powerhouse in London seeks a Lead Crypto Software Engineer to oversee new builds. This hands-on role involves designing low-latency services using Python and Go, working closely with traders and leading a team. The ideal candidate has front-office experience and a track record in buildin ...

Senior Infrastructure & Deployment Engineer

Principal Software Engineer, Nifty Gateway 108 E 16th Street, New York, NY 10003 Qualifications Deployment and infrastructure tooling Experience with one or more programming languages including but not limited to: Go, Node.js, Python, Scala, or Java Experienc ...

Embedded Optics Engineer Imaging & Firmware Pro

A recruitment agency seeks an Embedded & Optronics Optical Engineer for a role in Swindon, requiring strong opto-electronic skills, an Optical Engineering degree, and extensive software development expertise. Ideal candidates will have experience with imaging technologies and embedded systems, including programm ...

Frontier AI Evaluation Scientist

A leading AI evaluation firm in Greater London seeks a software engineer to evaluate cutting-edge AI models. You will run pre-deployment evaluations, analyze AI behaviors, and improve evaluation pipelines. Candidates should possess strong Python skills, process optimization experience, and the ability to derive ...

Lead SDN Engineer for Next Gen Software Defined Networking

A leading financial institution is seeking a Lead Software Engineer to join their VPC Network organization. In this role, you will design and deliver secure networking solutions while collaborating with cross-functional teams. The ideal candidate will have experience in systems engineering and strong programming ...

Senior AI/ML Engineer for Tensor Processing Units

A leading technology company in Greater London is seeking a Software Engineer III to develop AI frameworks and support advanced machine learning capabilities. The ideal candidate will have a strong background in C++ and Python, along with experience in machine learning infrastructure and large-scale systems. Thi ...

AI Software Engineer Computer Vision & Data Pipelines

White Swan Data is seeking an AI Software Engineer in London, UK. The ideal candidate should have expertise in Claude Code and strong Python skills. You'll be responsible for building and optimising AI workflows, developing computer vision tools, and managing databases. Benefits include a performance bonus, 25 d ...

VP Risk Software Engineer (Java/Scala, Spark)

WorksHub is seeking a full-time Software Engineer (Vice President) in Birmingham. This role focuses on managing multiple stakeholders while utilizing a diverse tech stack including Scala, Java, Python, and Spark. Candidates should be comfortable with TDD and build tools such as Maven. Enjoy a competiti ...

Principal Engineer & Tech Lead — Tech for Good

Stars Arena is looking for a skilled tech lead to manage projects, solve complex problems, and drive technical excellence. Ideal candidates should have strong programming skills, preferably in Python, and a solid background in software engineering. Experience in Architect, Principal, or Staff Engineer positions ...

Backend Engineer, Developer Experience & Platform Tools

UserTesting is seeking an experienced backend engineer to join the Developer Experience team in Edinburgh. You'll build and maintain backend services while improving workflows and CI/CD processes to facilitate efficient software delivery for engineers. Ideal candidates will have solid backend development experie ...

Staff Software Engineer, AI — LLM Systems

Cerebras is seeking a Staff Software Engineer (AI) in Greater London to design and build production-grade agentic AI systems. The role involves collaborating with cross-functional teams and requires strong expertise in Python and cloud development, particularly on AWS. Successful candidates will influence techni ...

Immunoinformatics Engineer: AI Driven Drug Discovery

DaltonTx in Greater London is seeking an Immunoinformatics Engineer to develop innovative technologies for drug design. The ideal candidate holds a Master's or PhD in Computational Biology or AI and has a strong Python background. Responsibilities include collaborating with cross-functional teams, developing AI ...

Ultra Low Latency Trading Engineer (C++/Rust) – London Hybrid

Hunter Bond is seeking a highly skilled Software Engineer to join their London-based team. The role involves designing and optimizing trading platforms for high-performance, ultra-low-latency environments. Applicants should have a degree in Computer Science or Engineering and experience with C++, Python, Rust, o ...

Platform Engineer — AI Driven DevOps & IaC

A leading engineering consultancy in Greater London is seeking a Platform Engineer to design and operationalise a production-grade Architecture as Code platform. The role involves building CI/CD pipelines and integrating AI-driven capabilities. Candidates must have strong software engineering skills in Python an ...

Remote Cloud Native Platform Engineer (Kubernetes, GCP)

Oliver Bernard is seeking a Mid-Level Platform Engineer with a strong software engineering background to join a digital transformation project. This remote-first role focuses on Cloud Native technologies and optimizing processes with a team of four engineers. Required experience includes GCP, Kubernetes, Terrafo ...

Remote AI Integration Engineer: Orchestrate Proactive Agents

Outlier AI is looking for a backend engineer to enhance AI agents through human feedback. The ideal candidate should have 2+ years of experience in backend engineering or AI automation, with strong skills in Python, JavaScript, or Java. This role allows for remote work and involves building production- ...

MLOps Engineer — Remote AI Agent Orchestration

Outlier AI seeks a skilled backend engineer to enhance AI agents by providing human feedback. The role emphasizes building production-grade software and requires a strong command of languages like Python and JavaScript. Candidates should have experience in complex systems integration and a detail-orien ...

Mission Software Engineer Field Deployments + AI/ML

A global technology company is seeking a Mission Engineer to drive the deployment of their capabilities. Responsibilities include software design, data integration, and troubleshooting products in the field. The ideal candidate has a strong technical foundation and proficiency in programming languages like Pytho ...

Real Time C++ Engineer (Hybrid) for News Systems

A global financial markets infrastructure provider is seeking a mid-level Software Engineer for its News Engineering team. You will enhance the real-time news collection platform while utilizing C++ and Python. This hybrid role embraces flexibility and growth, perfect for those passionate about high-performance ...

Field Deployment Software Engineer for Autonomous Systems

A leading defence technology company in the UK is seeking a Deployed Software Engineer to implement their technology with customers. The role involves travelling to customer sites, writing code, and collaborating with engineers. Ideal candidates will have a degree in a relevant field and strong programming skill ...

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