Senior Software Engineer Fullstack Python React Jobs in UK

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Agentic Software Engineer

Our client is a UK-based organisation operating in the medtech industry, with a team of around 200 people. They design and manufacture bespoke solutions that improve patients’ quality of life. They are investing significantly in technology and automation to support their next phase of growth. A key ...

Staff Software Engineer

hackajob is collaborating with Barclays to connect them with exceptional professionals for this role. A fantastic opportunity to join us as we create a standalone Payments Acquiring business embracing a fintech culture from our new offices alongside our Brookfield partners. Barclays ...

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 in London or who have the right to w ...

Software Test Engineer

Letly is an AI-native property platform that guarantees landlords their rental income. We take on the tenancy, manage everything end-to-end — compliance, maintenance, payments — and pay landlords every month, even when a property sits vacant. AI is what makes the economics work at a spread no traditiona ...

Principal Software Engineer

Salary: Up to £110,000 + Bonus & Benefits We're looking for a Principal Software Engineer to join a global technology business whose platforms underpin consumer experiences used by millions of people every day. This is an established, scaled business with a genuinely global reach and this r ...

Java Software Engineer

We are looking for a hands-on Java Developer with deep experience in Apache Struts and enterprise Java migrations to join our application development team. You will be stepping into an active, in-progress migration — 6 of 17 modules have already been completed, and established patterns are in place. Your m ...

eFX Software Engineer

We are recruiting on behalf of a leading financial institution seeking a skilled eFX Software Engineer to join their electronic trading team in London. This role offers the chance to work on cutting‑edge, low‑latency FX trading platforms that support global markets, while shaping innovative solutions in a ...

Software Solutions Engineer

Location: Cheadle, United Kingdom Thales is a global technology leader with more than 83,000 employees on five continents. With over 7,500 people in the UK, operating across defence, space, aerospace, and digital security, we help build a future we can all trust. Thales supports the security and sta ...

C# Software Engineer

Our client based in Sheffield is looking for a skilled C# .NET Developer to join a small, collaborative engineering team working on modern cloud-based applications. This is a hands‑on development role where you will contribute across the full software lifecycle, including maintenance, enhancements, and the ...

Software Engineer .net

Role Title Software engineer Duration 6 month contract Location Milton Keynes, 1 day per month. First few days of contract will need to be in office to get up to speed Rate up to £550 p/d Umbrella inside IR35 Role Purpose / Summary </ ...

Java Software Engineer

Harrington Starr are working alongside a unique financial trading technology firm who are seeking 10+ Senior Java Developers to join their Core Development team and build out low latency systems. You absolutely have to have is a demonstrable interest in technology, precision, and technical excellenc ...

Principal Software Engineer

We are looking for a Principal Software Engineer to be the technical leader for this critical initiative within our Experience Engineering workstream. You will define the long‑term technical vision and architectural roadmap for adapting our platform for a global audience. This is a unique opportunity to ow ...

Staff Software Engineer

Requirements Experience as a senior level engineer working across a modern web stack Strong software engineering principles (SOLID, DRY, ER modelling) Professional experience with a server-side language, ideally JVM based Comfortable working with cloud infrastructur ...

Software Test Engineer

Here at Humanoid, we believe in a future where robots amplify human potential. That’s why we’ve set out on a mission to build the world’s most capable, commercially‑scalable, and safe humanoid robots. We’re bringing that mission to life with HMND‑01 Alpha - our rapidly developed humanoid platform now runni ...

Java Software Engineer

Location: Onsite (London) Type: Full-time | Permanent Level: Junior London based candidates only. Job Summary We are seeking a skilled and motivated Java Developer to join our growing software development team. As a Java Developer, you will be respons ...

Software Engineer, Infrastructure

About The Company At Harmonic, we are building a mathematical reasoning engine that operates with absolute precision. While most AI makes maximum‑likelihood guesses, Harmonic’s Aristotle uses Lean4 and reinforcement learning to verify its reasoning and results. Following our Gold Medal‑level perf ...

Software Engineer Yalla

About The Role We are growing our digital capabilities at bp, and we're looking for a Software Engineer who is excited to shape the future of energy through technology. In this role, you will deliver features that will be used by teams throughout the business, help other teams adopt modern engine ...

Software Engineer London

Overview Perk is hiring a Software Engineer who owns features end-to-end, from understanding customer pains with the product team, through design, coding, deployment, and measuring impact. You will see how technical decisions move the needle for customers daily. We value autonomy and pragma ...

Software ML Engineer

Job Overview We have a fantastic opportunity to move into the era of Machine Learning and Artificial Intelligence, key technologies for the future of computing. Arm is everywhere technology matters. Are you passionate about ML systems and keen to shape how AI runs efficiently on next generation a ...

Data Software Engineer

Requirements Strong Python capability for building data processing pipelines Confidence working in Linux environments to run and maintain workflows Solid understanding of data ingestion, transformation and processing pipelines Ability to design and manage data ...

Software Engineer (Backend)

Requirements Degree in Computer Science, Software Engineering, or equivalent practical experience Proficiency in Python or another backend language (JavaScript/TypeScript, C#, Golang). Engineers are assessed in their preferred language during a live coding session Strong ...

Integration Software Engineer

Requirements Prior quantum computing knowledge is not necessary - you will learn this along the way! A Bachelor's degree (or equivalent) in Computer Science, Electronic Engineering, Physics, Maths or a related discipline Great communication skills and an ability to work ...

Staff Software Engineer

Job Description About our Marketplace Enablement Org and User Dialogue Team Within Marketplace Enablement, we build the technology that helps candidates and recruiters find the right match. Our teams deliver data products, search and recommendations, and intelligent user dialogue ...

Software Engineer(GoLang)

We’re Hiring: Software Developer (Go / AWS) | London | Permanent Opportunity I’m currently partnering with a London-based media software company that is building large-scale, cloud‑native platforms within the digital entertainment space. They’re looking for an experienced Software Developer to jo ...

Backend Software Engineer

Requirements A passion for designing and building fantastic API's, delivering great developer experiences to go with it An interest in working with Elixir, this is what we mostly work with. Previous experience isn't necessary and learning on the job is absolutely fine Wh ...

Research Software Engineer

Requirements Master’s in Computer Science (or equivalent experience) 4 + years building and operating large-scale or distributed systems Strong software-design instincts: modular code, tests, CI/CD, observability Fluency in Python p ...

Java Software Engineer

A software service provider is looking to expand their teams across the UK. Our client is currently looking for multiple passionate Java Developers with an interest in Cloud technologies to realize their own vision on how development services should be made, this is about bringing unique ideas to the table ...

Software Engineer II

Description The Opportunity VoucherCodes, a key part of Ziff Davis Shopping, is looking for a Software Engineer II to join our Engineering team in London. In this hybrid role, you will join a collaborative squad of over 25 UK-based engineers within a global team of 50+, reporting to an ...

Software Engineer (Platform)

Requirements Proven experience in backend development: TS/Node (required) Direct experience with GCP and knowledge of AWS, Azure, or other cloud providers Efficiency in ideation and implementation, prioritizing tasks based on urgency and impact Preferred: Exper ...

Java Software Engineer

Want to build real-world software that powers space missions? At Bright Ascension, we’re redefining how software is developed for the space industry — working with organisations across the globe, from space agencies to innovative start-ups. Our technology helps bring space systems to life f ...

Principal Software Engineer

Principal Software Engineer – Ocean Infinity Ocean Infinity is seeking a Principal Software Engineer to provide technical leadership and hands‑on engineering across our core software platforms. Location: Porto, Portugal (hybrid working arrangement). Reporting directly to the Head of Softw ...

Founding Software Engineer

I'm working with a well-funded, early-stage startup in London that's just closed a multi-million pound funding round and already has active customers and a live product. They're now hiring Founding Engineers to help scale it. The problem they're solving is massive - we're talking a trillion-dollar ...

Principal Software Engineer

At Sony Music Entertainment , we fuel the creative journey. We’ve played a pioneering role in music history, from the first‑ever music label to the invention of the flat disc record. We’ve nurtured some of music’s most iconic artists and produced some of the most influential recordings of all time. ...

Software Engineer (Onboarding)

Ebury helps ambitious businesses unlock global growth, and we take the same approach with our people. We encourage innovation and movement, collaboration and problem-solving, and foster an environment where everyone can feel they belong, are valued, supported and empowered to succeed. Software Eng ...

Software Test Engineer

Requirements Is a critical thinker, with an urge to learn new things and new technologies Has good troubleshooting skills Is creative Is self-driven Is proficient in English Has a few years of experience with software testing It is also co ...

Principal Software Engineer

Requirements You’re experienced (typically 12–15+ years) building web apps, having designed and implemented full-stack features from start to finish using TypeScript (and ideally AWS) You focus on impact. You’ve led the engineering of critical systems, working with advanced AWS, IaC, ...

Software Test Engineer

Requirements We are looking for a motivated individual, who is confident to take ownership of quality within a team environment and is always thinking of ways to improve the standard of product quality A high level of communication skills and technical understanding Communic ...

Software Engineer II

The Role Due to an increase in software development demand across a number of projects, we have an opportunity for a Software Engineer to join our Devices Team. You will be primarily focused on designing, developing, and supporting the introduction of new product features while resolving legacy p ...

Software Development Engineer

Requirements You have experience building web products and services, and have an awareness of technologies across the stack You adapt to new technologies and processes quickly You thrive in a collaborative environment and believe the best products are built through colla ...

Software Engineer (Manufacturing)

Requirements Proven experience in development using Python (at least 2 years) Knowledge of or adaptability to Linux-based development (Ubuntu) Excellent problem-solving and documentation skills Experienced in debugging and peer reviewing Knowledge of versio ...

Software Engineer (GenAI)

Job Description This is an fantastic opportunity for a Software Developer (GenAI) to join at an exciting time for AJ Bell as we expand the usage of AI within the business. Our GenAI development team are at the heart of this growth and we have a strong team working environment, training and excelle ...

Lead Software Engineer

Introduction Saab UK is part of Scandinavia’s largest defence company, bringing together the best of Swedish and British innovation. Saab offers world‑leading solutions and services in defence, aviation, space, and civil security to keep people and society safe. Our UK presence has been grow ...

Software Engineer III

Job Description This job is with Bank of America, an inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Job Title Software Engineer III Corporate T ...

Software Engineer AI

Job Title: Software Engineer - AI Location: London / HybridSalary: £80,000 - £120,000 per annum + benefits Why Apply? A technology-led organisation is building a genuinely AI-native capability, embedding artificial intelligence into its products, platforms ...

Graduate software engineer

A few examples of your responsibilities Build software that matters. Take real ownership from idea to production, creating systems used by millions and evolving them into products at scale. Amplify your impact with AI. Integrate the most powerful AI tools directly ...

Lead Software Engineer

Job Responsibilities Leads the design and development of scalable and resilient systems using Java or Python, driving continual, iterative improvements across product teams Drives decisions on software solutions, architecture, design, development, and technical troubleshooting with a ...

Lead Software Engineer

Principal/ Lead Software Engineer - up to £140,000 + 10% bonus + Benefits + Newcastle City Centre When you got into Software Engineering, it was to solve problems, write code and improve the way things are built. A lot of Principal roles slowly become less hands‑on o ...

Lead Software Engineer

Location & Contract Multiple UK locations (hybrid working) Permanent Overview Sellick Partnership is currently supporting a large public sector organisation with the recruitment of a Lead Developer to join their Digital Delivery function. This is a key leadership role, r ...

Lead Software Engineer

Pay up to £92,522, plus 28.97% employer pension contributions, hybrid working, flexible hours, and great work life balance. Are you ready to lead at scale - shaping how complex digital services are built, mentoring engineers and influencing senior leaders across one of the UK's largest technology o ...

Founding Software Engineer

The one who turns intelligence into infrastructure. Someone builds a model that says reprice this SKU to £24.99. Someone else builds a demand forecast that says reorder by Thursday or you're out of stock by Monday. Someone else calculates that your marketing spend is pouring traffic toward your ...

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