Senior Software Engineer Pythonjava Jobs in UK

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Principal Software Engineer

Principal Full-Stack Engineer (Java,React,LLMs) Hello from RE Partners! Who We Are: We are a fast growing business and technology consultant company co-founded in 2019. We offer a custom-tailored, white-glove engineering service fit for our clients, because a digital ...

Graduate Software Engineer

Graduate Software Engineer | Deep Tech Start-Up | London I am partnered with one of the UK’s most exciting deep-tech startups - a business already delivering cutting-edge technology to an exceptionally impressive client base, including some of the UK’s leading technology or ...

Graduate Software Engineer

Graduate AI Engineer | Extremely Well-Funded AI Start-Up | London I am partnered with a well-funded, rapidly growing AI start-up, founded by a world-class team using cutting-edge AI to solve a genuine real-world problem. They are now looking to hire a worl ...

Java Software Engineer

Senior Java Developer 11 roles available (mid to senior level) Pay rate: Outside IR35 – £600 to £800/day (depending on experience) Duration: Initial 6–9 months (programme running through to 2027) Worki ...

Principal Software Engineer

Principal Software Engineer (FinTech) - £80,000-£90,000 - Hybrid A fast-growing fintech company is looking for a highly hands-on Staff Software Engineer to help drive platform modernisation, cloud transformation, and intelligent automation across a rapidly scaling technolog ...

Principal Software Engineer

Locations: London (must be willing to travel to client sites throughout the UK on an ad hoc basis) Level: Manager Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance which requires 5 yea ...

Lead Software Engineer

Founding Engineer Manchester (Hybrid) AI Product / Mobile / SaaS The Opportunity We’re working with an early-stage, mission-led software business looking to hire a Founding Engineer ...

Lead Software Engineer

Lead Software Engineer Contract to Permanent Hybrid (London) Rates negotiable Most streaming platforms struggle to scale backend systems properly you’ve seen it. This role is about building ...

Staff Software Engineer

Who are we and What do we do? ShareChat (Mohalla Tech Pvt Ltd) is India’s largest homegrown social media company and the only local player to achieve profitability in the industry, with 200+ million Monthly Monetizable Users across all its platforms. Founded in 2015, ...

eDV Software Engineer

eDV Software Engineer - Mid-Lead Level - Security & Defence Location: London, Gloucester, or Manchester (Hybrid options available) Salary: £47,000 - £90,000 + clearance uplift + company bonuses + benefits ...

Java Software Engineer

An exciting opportunity for a Java Software Engineer has arisen with a leading semiconductor company specialising in high-performance mixed-signal processing, based in London. This is an exciting opportunity for a Java Software Engineer to design and evolve cross-platform applications, SDKs, ...

Quantum Software Engineer

Metric have partnered with a leading quantum technology company developing next-generation computing systems. They’re hiring a Quantum Software Engineer to turn cutting-edge quantum research into practical, executable software. Location - London, UK (Hybrid or Remote) You’ll design and imple ...

Principal Software Engineer

Fastest Growing Start-up in the UK | Defense We are partnered with one of the UK's fastest growing start-ups. They are a very technically focused group building cutting-edge decision making technology. The company's founding team has real pedigree, with backgrounds from t ...

Embedded Software Engineer

Role: Embedded Software Verification and Validation Engineer Location: Bristol / Hybrid (typically 4 days per week on-site) Salary: Up to £64,000 - Depending on Experience ***Please note this role will require successful applicants to hold on of the following: British Citiz ...

Lead Software Engineer

Director / Principal Engineer – Manchester Manchester- on site Salary: £130,000 We’re partnered with a global financial services organisation hiring a Director-level Principal Engineer to lead the build of ...

Principal Software Engineer

Expert-level PLC/HMI development Siemens TIA PORTAL , experience in delivering machine control software is a must Our client is a leading designer and manufacturer of complex, bespoke automation mach ...

Embedded Software Engineer

Job Title: Embedded Software Engineer Location: London, United Kingdom Company: Chevalier Tech Job Type: Full-Time, Permanent About Chevalier Tech Chevalier Tech is a cutting-edge technology company based in London, focused on d ...

Prinicpal Software Engineer

Principal Software Engineer London - Hybrid Up to £140k + bonus We're working with a profitable, engineering-led fintech that builds software used by investment firms to manage reporting, data, and client-facing outputs. Their platform ...

Embedded Software Engineer

If you’re passionate about pushing the limits of embedded software and want your work to have a direct impact on next-generation space systems, this could be for you. We’re working with a pioneering space technology company developing AI-enabled autonomy software for spacecraft </str ...

Java Software Engineer

Locations: Glasgow/Edinburgh (must be willing to travel to client sites throughout the UK on an ad hoc basis) Please Note: Any offer of employment is subject to satisfactory SC security clearance which requires 5 years continuous UK address history, typically includ ...

C++ Software Engineer

C++ Software Engineer – High-Frequency Trading A systematic trading firm of similar calibre to leading names in the space is seeking exceptional C++ Software Engineers to join its world-class engineering team. This is a hybrid position, open to candidates based ...

Senior Software Engineer Python & React (Hybrid UK)

A tech-for-good startup in the UK seeks a Senior Software Engineer to enhance clean transport technology. You will work closely with the CTO across the full stack using Python and React, owning backend systems and contributing to platform scaling. The role offers a competitive salary up to £75k, 27 days holiday ...

Senior Android Software Engineer – Remote & Full Stack

A leading travel experience company is looking for a Senior Software Engineer with Android development experience to join their team. This position can be remote from anywhere in the United Kingdom or hybrid from their offices in Oxford or London. Key responsibilities include coding at all levels, collaboration ...

Senior Software Engineer Healthcare IT & API Specialist

A leading medical technology organization in the UK is seeking a talented Senior Software Developer to join their team. You will design, develop, and maintain high-quality software solutions impacting healthcare professionals. Candidates should have strong experience in C#, .Net Core, and RESTful APIs. This role ...

Senior Software Engineer Code Scanning (Remote UK)

A leading software development firm is seeking an experienced Software Engineer to join their Code Scanning team. This position allows for remote work from the UK and requires 6+ years in software engineering with expertise in languages such as C++, Java, Ruby, and Go. Responsibilities include designing high-qua ...

Senior Spacecraft Software Engineer — GNSS Data Pipelines

CleanTech Talent is supporting a leading space-to-cloud analytics company in hiring a Senior Spacecraft Software Engineer. This role involves developing software for GNSS-based satellite missions and requires proficiency in Embedded C/C++, GNSS signal processing, and Python. You will work at the cutting edge of ...

Senior Software Engineer, Trading Technology (Query Stack)

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Software Engineer, Trading Technology (Query Stack) in United Kingdom. This role offers the opportunity to work at the core of a high-performance trading and market data environment, p ...

Senior Software Engineer – AI Driven API & Automation

A global, data-driven technology firm is seeking a Senior Software Engineer to join a dynamic team. This position offers significant autonomy and aims to push technical boundaries. The ideal candidate will have a passion for software engineering and an interest in AI. Responsibilities include building APIs to en ...

Senior Software Engineer HealthTech Impact, Stock Options

A leading Scale-up business in the UK is seeking a Software Engineer to join their expanding team. You will work alongside talented professionals in a collaborative environment where cleaning software solutions that drive behavioral change is paramount. The ideal candidate is ambitious, self-driven, and has expe ...

Senior Software Engineer, Data Platform (Remote First)

A technology startup is seeking a Senior Software Engineer to drive technological innovation and product delivery. You will be responsible for understanding business problems, designing critical features, and switching between various tasks. Ideal candidates will have over 5 years of experience in software devel ...

Senior Software Engineer AI Fintech foundation (UK)

About the Team Hopper's Fintech Foundation team sits at the centre of the company's mission: reshaping how more than 100 million monthly active users experience travel. It owns the pricing engine that balances customer demand against financial risk across dozens of partners — including Capital O ...

Senior Software Engineer (Go) UK Faster Payments

Senior Software Engineer (Go) – UK Faster Payments Join to apply for the Senior Software Engineer (Go) – UK Faster Payments role at Form3 As a Senior Engineer in the UK Engineering Team, you’ll maintain and enhance mission‑critical infrastructure technology for the world’s ...

Senior Software Engineer II AI & Cloud Platforms

A leading academic publishing company is seeking a Senior Software Engineer II to develop cloud-hosted applications, ensuring technical stability and performance. Candidates should have experience with modern development practices, including Agile and test-driven methodologies. The role involves collaborating cl ...

Senior Software Engineer AI‑Driven Platform, Remote

OAG Aviation Worldwide Limited is seeking a Full-Stack Developer to drive product-led growth by developing features end-to-end. You will work on core platform capabilities, integrating AI models, and building customer-facing experiences. The role requires extensive full-stack experience, strong front-end skills, ...

Remote Senior Software Engineer Code Analysis & AI

Kubelt is seeking a Senior Software Engineer in the UK, focusing on code analysis and software development. The role involves maintaining detection support for various programming languages, developing the CodeQL query language, and working alongside engineering teams to enhance product quality. With a requireme ...

Senior Software Engineer — AI Driven, Product Focused

A leading embedded insurance provider seeks a Product-Minded Senior Software Engineer III to incrementally deliver customer value. In this hybrid role, you'll work closely with AI tools to research, plan, and implement product changes, ensuring high quality and velocity. Responsibilities include leading problem ...

Senior Software Engineer Autonomous Maritime Systems (Hybrid)

A leading engineering firm in the UK is seeking an experienced Software Engineer to develop advanced software solutions for autonomous systems in marine and defence technology. You will lead software design and collaborate with multidisciplinary teams, ensuring integration and delivery of projects. Applicants sh ...

Senior Software Engineer, Data Infra (Rust/Golang)

A utilities management company in the UK is searching for a Senior Software Engineer to enhance their software and microservices within an event-sourced architecture. The ideal candidate should be proficient in Rust and Golang, with experience in Kafka, PostgreSQL, AWS, and Terraform. This role includes mentorin ...

Senior Software Engineer AI Platform & Cloud (Hybrid)

A leading AI company in London is looking for a passionate Senior Software Engineer to design, develop, and implement the Ultralytics HUB, our AI model platform. The role involves building backend services, frontend applications, and managing cloud infrastructure. Ideal candidates should have over 5 years of exp ...

Senior Software Engineer — Remote, Green Tech Impact

Lunar Energy is seeking a Senior Software Engineer to join our talented team in the UK. In this fully remote role, you will design and implement business logic via APIs and UI interfaces, working with a small team to improve development practices. Ideal candidates will have 4+ years of software engineering exper ...

Founding Senior Software Engineer, AI in Healthcare

A British healthtech startup is seeking a mid-senior level engineer to develop an AI co-worker that enhances care coordination in healthcare systems. The role is full-time and based in Central London. Responsibilities include collaborating with users, designing product features, and working with backend technolo ...

Senior Software Engineer in Test IOE: Cardano

Senior Software Engineer in Test - IOE: Cardano Posted 4 days ago. Be among the first 25 applicants. About IOG IOG is a technology company focused on blockchain research and development. We are renowned for our scientific approach to blockchain development, emphasizing peer‑revi ...

Senior Software Engineer Grafana Managed Services Remote

Grafana Labs is looking for a Senior Software Engineer to join their Managed Services team in the UK. This remote position entails ownership of running and evolving multi-cloud streaming infrastructure, improving observability and operational efficiencies. Ideal candidates will have over 6 years of experience in ...

Senior Software Engineer: Distributed Systems for Science

Humand Talent is seeking a Software Engineer to join a world-class engineering team in England. You will design and develop high-performance software primarily in Python, collaborating with scientists and engineers to tackle complex technical challenges. Candidates should have strong fundamentals in software eng ...

Remote Senior Software Engineer, P2P & Cross Platform

Framework Ventures is seeking an experienced full-stack/mobile/desktop developer to create flagship decentralized applications. The ideal candidate has over 5 years of software engineering experience, particularly with React Native and Electron. You will work on designing cross-platform user experiences and inte ...

Senior AI Software Engineer Prompt & LLMs (Hybrid)

An innovative AI software company in London is seeking a Senior Software Engineer to develop scalable AI-driven applications. This role involves working closely with AI specialists, designing APIs, and mentoring junior engineers. The ideal candidate has extensive experience in Python and TypeScript, hands-on kno ...

Senior Go to Market (GTM) Software Engineer

Senior Go-to-Market (GTM) Software Engineer 1 week ago Be among the first 25 applicants This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Go-to-Market (GTM) Software Engineer in Europe . In this role, you will ...

Senior Software Engineer Contract (Java, Spring Boot)

Futureheads Recruitment | B Corp™ is seeking experienced Senior Software Engineers for multiple contracts across public sector organisations in England. Responsibilities include designing and enhancing scalable digital services, developing backend systems using Java and Spring Boot, and integrating APIs and micr ...

Senior Software Engineer, Git Storage Remote UK

A leading developer platform is seeking a Senior Software Engineer to join their Git Systems Engineering team. The ideal candidate will have extensive experience in software engineering and a strong background in various programming languages such as C, C++, Java, and Python. Responsibilities include designing s ...

Senior Software Engineer – Backend & Edge/IoT (Hybrid)

A leading technology firm in the United Kingdom seeks a Senior Software Engineer for its Defence business unit. In this role, you will lead backend and edge/IoT engineering, collaborating with teams to implement scalable solutions and shipping production-ready code in Python and a compiled language. The position ...

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