Senior Software Engineer Fullstack Python React Jobs in UK

Professional job seekers finding United Kingdom jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
Expertini Penguin Mascot Resume Score™
Resume Score™ Instantly
Upload Your CV
Quick 30-second process

Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

Reset

Create Job Alert

 
   
Reset

Backend Software Engineer Portfolio Data Workflows

Overview Addepar is a global data and AI platform empowering investment professionals to turn complex financial information into actionable intelligence. Addepar unifies portfolio, market and client data in a total portfolio view and delivers AI-powered insights within investment and client workfl ...

Security Cleared Software Engineer (Hybrid, Manchester)

A leading technology company in Manchester is seeking Software Engineers to contribute to the design and development of secure, scalable software services. Candidates should have active SC or DV clearance and a solid foundation in software engineering principles. This role involves collaboration with customers, ...

Software Engineer — Real Time Engagement Platform

A forward-thinking tech company in Ipswich is seeking a Software Developer to enhance their Horizon platform. In this role, you'll design and develop web applications, troubleshoot existing systems, and mentor fellow developers. The ideal candidate has 4–8 years of experience in web-based applications, strong kn ...

Graduate Software Engineer: AI & Networking Systems

A leading technology firm is seeking a dynamic Software Development Engineer in Cambridge, UK. Ideal for recent graduates, the role involves validating software features, collaborating with teams, and contributing to next-generation software for networking solutions in a hybrid work environment. Candidates shoul ...

Lead Substation Automation Software Engineer (SCADA)

A global power and energy company is seeking a Lead Software Engineer for Substation Automation to develop embedded and PC-based software for SCADA systems. The role includes enhancing existing systems and designing new architecture while ensuring compliance with industry standards. Candidates should possess exc ...

Software Engineer III, Search, Mobile (Android)

Software Engineer III, Search, Mobile (Android) Google London, UK Qualifications Bachelor’s degree or equivalent practical experience. 2 years of experience with software development in one or more programming languages, or 1 year of experience with an advanced d ...

Software Engineer (Req ID: 2026 09)

Description Software Engineer Kingston Upon Thames, UK Office (Hybrid) Candidates must have legal work authorization to work in the United Kingdom at the time of application. SS8 is not able to provide visa sponsorship for this role. This position requires the ability to achieve a ...

Defence Simulation Software Test Engineer Hybrid

An established defence company located in the UK is seeking a Software Tester to take ownership of testing complex defence simulation systems. The ideal candidate will have extensive software testing experience, hold necessary certifications, and be a British citizen due to security clearance requirements. This ...

Founding Software Engineer — Build Browser Automations

A technology company based in Greater London is looking for a software engineer to develop browser automation solutions. You will improve the automation engine, create a secure environment, and build tools for customers. Candidates should have at least 1 year of software experience and a strong desire for owners ...

Impactful Software Engineer, Truth Seeking AI

A pioneering AI technology firm based in Greater London is seeking exceptional software engineers to tackle significant product and technical challenges. Candidates will thrive in a meritocratic environment where they are expected to take the initiative and contribute meaningfully to the organization's mission. ...

Full Stack Software Engineer Application Development

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and mor ...

Mobile Software Engineer III, iCasino UK

About Us Fanatics is building a leading global digital sports platform. We ignite the passions of global sports fans and maximize the presence and reach for our hundreds of sports partners globally by offering products and services across Fanatics Commerce, Fanatics Collectibles, and Fanatics Bett ...

Software Engineer – Cloud, Security & Web Apps

A leading luxury watch retailer in West Malling is seeking a Software Developer to design and develop robust web applications. This role involves collaborating closely with the engineering team, maintaining application quality, and implementing security measures. The ideal candidate has experience with Angular, ...

Software Development Engineer II (Kotlin/Android)

Tesco UK • Welwyn Garden City • Hybrid • Full-Time • Permanent • Working hours 36 • Apply by 01-Jul-2026 Tesco's Scan As You Shop solution is an in‑store experience that lets customers build a virtual basket on a handheld device during their shopping journey so that they can keep a close ey ...

Energy Markets Software Engineer: Microservices & TypeScript

Job Description Join our team and help shape the future of the global energy markets. You would work as part of a team on a cutting-edge Microservices architecture and using TypeScript , Express , AWS Lambdas, Redshift, MySQL, MongoDB and Micro-fronten ...

Staff Software Engineer Engine by Starling

Overview At Engine by Starling, we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses, on our technology. Engine is Starling's software-as-a-service (SaaS) business, the technology that was built to power Starling, and ...

Backend Software Engineer (£80k) at InTouchNow.ai

Job Title Backend Software Engineer (£80k) Salary Up to £80k Company Description InTouchNow.ai – Award-winning healthcare technology company building AI voice agents for the NHS. Job Description Join a high-impact team building AI-powered voice agent ...

Principal Software Engineer, Personalisation & ML Systems

A leading UK retailer is seeking a Principal Engineer to lead technical strategy within the Personalisation product group. This role involves designing scalable systems for personalisation, recommendations, and machine learning features. The ideal candidate has a strong background in Java or Python, experience w ...

Software Engineer III Android Digital Identity

Software Engineer III - Android - Digital Identity LONDON, LONDON, United Kingdom Job Identification Job Category Software Engineering Business Unit Corporate Sector Posting Date 01/16/2026, 10:16 AM Locations 1 Cabot Square, London, E14 4QJ ...

Controllers Software Engineer Vice President Birmingham

Controllers Engineering Controllers Engineering is responsible for designing and implementing solutions that support financial measurement and reporting, including revenue, balance sheet, liquidity and capital. We also help meet the firm’s global regulatory financial reporting obligations and bui ...

Software Test Engineer (QA & Automation) – Nottingham

A tech-focused recruitment agency is seeking a Software Test Engineer/QA Tester in Nottingham. The successful candidate will ensure software quality, working with digital platforms and APIs. Responsibilities include designing tests, creating automation scripts, and collaborating with Agile teams for continuous i ...

Software Engineer Embedded Defense (C++, Agile)

A leading aerospace and defense company is seeking a Software Engineer in Edinburgh to work on cutting-edge projects. You'll join an agile team to architect, design, and test new functionalities, ensuring the software's role in national air defense. Required skills include strong programming, particularly in C++ ...

Field Technical Ops Engineer: Hardware & Software

A leading defense technology company in Greater London is seeking a Technical Operations Engineer to ensure seamless operation of systems in real-world missions. The ideal candidate will integrate hardware and software for customer systems, debug technical issues, and develop automation tools. Applicants should ...

Staff Software Engineer, Enterprise Lending Platform

A global financial technology company is seeking a Staff Software Engineer. This role will focus on architecting, designing, and implementing scalable systems for their lending platform. Candidates should have substantial experience in software engineering, leadership, and building robust APIs, preferably using ...

Embedded Software Engineer – AI & Data Center

A leading technology company in Belfast is looking for a Software Design Engineer to join their Data Centre design team. This role involves developing and verifying embedded software for next-generation AI products, with a strong focus on innovation and collaboration. Candidates should have a proven track record ...

Hybrid Software Test Engineer – Automation & Quality

A technology solutions provider based in Great Torrington seeks a Software Test Engineer. This entry-level role involves developing and executing test plans, identifying issues, and ensuring software quality. Ideal candidates will have an analytical mindset, a passion for testing, and a collaborative approach to ...

Forward Deployed Software Engineer UK Government

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and mor ...

Mid Level Software Engineer (Java / AWS)

Mid-Level Software Engineer (Java / AWS) We’re supporting a large, well-established UK organisation on a key digital delivery programme and are looking for two mid-level Software Engineers to join an existing engineering team. This is a hands-on development role suited to engin ...

Staff Software Engineer — Lead Platform Architect

A financial technology company in London is seeking a Lead Engineer to shape the future of investments by developing scalable systems. The successful candidate will have a strong background in system architecture and programming, lead technical projects, and mentor teams. This role offers a competitive salary, h ...

Software Engineer, New Grad Production Infrastructure

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and mor ...

Staff Software Engineer DevSecOps (Cyber/Defence)

A global aerospace and defence company in Gloucester is seeking a Staff Software Engineer to work on cutting-edge Defence and Cyber programmes. You will play a pivotal role in software systems development, influence architectural decisions and mentorship of junior staff. This position offers competitive benefits ...

Software Development Engineer in Test (SDET)

Retire the ERP. Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers—automated accounting, real-time reporting, and financial flows that move at the speed of the business. We build with our c ...

Structural Engineer – Technical Support & Software Applications

This is a varied and hands‑on role, ideal for a structural engineer who enjoys problem‑solving, communicating technical concepts, and working closely with both customers and developers. As a 1st Line Support Engineer / Software Applications Engineer, you will be the first point of contact for techn ...

Autonomy Software Engineer: Multi Agent Robotics

A defense technology company seeks a Mission Software Engineer to develop autonomy solutions and ensure seamless integration of systems. The ideal candidate will have a strong background in engineering and at least 2 years of experience with C++ or Rust, demonstrating a bias for action and critical thinking. Thi ...

C++ Software Engineer – HFT Desk (London)

A leading trading firm in London is seeking a skilled Software Engineer with expertise in C++ for their high-frequency trading team. The role involves working closely with traders and researchers to enhance algorithmic trading strategies. You will contribute to critical systems that process vast data and optimiz ...

Backend Software Engineer C# .Net Core

Get AI-powered advice on this job and more exclusive features. This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Client Server Senior ...

Software Engineer in Bishops Cleeve Peregrine

Overview This is a job posted by our partner Jooble. To read the full text, please click on the Apply Now link. Key Skills Experience with Testing (Cucumber) and various AWS services (Lambda, DynamoDB, SQS, SNS, Fargate, API Gateway, etc.) About the Employer < ...

FinTech Software Engineer Core Platform (Newcastle)

A FinTech startup in Newcastle is seeking a Software Developer to join their team focusing on complex systems. This role offers competitive pay of up to £70k, a bonus, and a dynamic workplace culture. Candidates should have a relevant degree and experience in backend development, with a strong command of C# .NET ...

Java Engineer, Tooling — Ground Software & Dev

A leading software company in the space sector is seeking an experienced Java Engineer to join their innovative team in Edinburgh. This full-time role involves designing, developing, and testing ground software while collaborating with cross-functional teams to deliver high-quality software products. Candidates ...

Software Engineer, Safeguards Infrastructure London, UK

Software Engineer, Safeguards Infrastructure London, UK About Anthropic Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of commi ...

Software Tools Engineer – Compiler & Web UI

A leading semiconductor company in Edinburgh is seeking an Associate Engineer to work on compiler tools for Battery Management Systems (BMS) and web-based applications for engineers. Ideal candidates will have a degree in Computer Science or related fields, with foundational skills in React and Node.js. The role ...

Staff Software Engineer, Inference London, UK

Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build benefici ...

Public Health Software Engineer – Hybrid (Laravel)

A technology company based in the United Kingdom is seeking a skilled software developer to solve complex problems in the public health sector. The role involves designing and developing high-performance applications, conducting code reviews, and collaborating with various stakeholders. Candidates should have su ...

Full stack Software Engineer (Research team)

Applications Deadline We accept submissions until 15 January 2026. We review applications on a rolling basis and encourage early submissions. About the Opportunity We’re looking for Full-stack Software Engineers who are excited to build tools for frontier AGI safety research, e.g. ...

Software Engineer, Backend AI Practice Team

Software Engineer, Backend - AI Practice Team Warrington, Cheshire, United Kingdom and 1 more Be the First to Apply Job Description ABS is seeking an exceptional Backend Engineer to join us full-time on our Artificial Intelligence (AI) Practice Team. In this role, you will d ...

Lead PLC Software Engineer – Automation & Commissioning

A leading automation company is seeking a Principal Software Engineer (PLCs) to lead the software delivery for complex bespoke automation projects. The role involves ensuring high standards in software implementation, guiding engineering teams through development and commissioning processes, delegating tasks, an ...

Staff Software Engineer (Mobile) London, UK

Please note this is for London, UK. You only need toapply to one location if there are multiple listed for the job. Apply Now At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for fi ...

Principal Software Engineer Logistics and Fulfilment

About Us We’re the team behind digital retailer Very. Our purpose – helping families get more out of life – powers everything we do. And we want our people to get more out of life too! If you’re high‑performing, ambitious and make the most of every opportunity, we want to hear from you. I ...

Operational Software Engineer, Cyber Security & Embedded

A cyber security firm in Cheltenham seeks full-stack developers to work on bespoke software solutions. Responsibilities include designing new products and adding capabilities to existing ones. The ideal candidate has strong skills in Python and C++, as well as experience in leading projects. The role offers mark ...

Associate Software Engineer Inbound and Warehouse

Associate Software Engineer - Inbound and Warehouse ASOS.com • Belfast, Northern Ireland, United Kingdom We work in-office at least 2 days a week to move faster, learn quicker, and build a strong, collaborative culture. We exist to give people the confidence to be whoever they wan ...

🚀 Boost Your Hiring Chances with Our AI-Powered Tool-Kit

Stand out from thousands of applicants. Use our proven career tools to optimize your applications and land your dream job faster.

To-Do Planner

Organize your job search and personal tasks. All data is confidential.

Open Planner

Wellbeing Center

Access your confidential wellness report and resources to manage job search stress.

Check Wellbeing

Skill Coach

Plan your skill development with O*NET support to stay competitive in your field.

Start Coaching

Outfit Helper

Get AI-powered suggestions on what to wear for your next interview.

Find Outfit

Income Tax Calculator

Plan your finances with our calculator, updated for 2025 tax regulations.

Calculate Tax

Salary Benchmark

Get accurate, AI-supported salary trends to know your worth and negotiate better.

Check Salaries

Interview Practice

Practice for any interview with AI-enabled Q&A sessions. All data is private.

Start Practicing

Interview Predictor

Use our AI-supported tool to predict potential interview questions based on your resume.

Predict Questions

Interview Practice Timer

Use our mock interview trainer to perfect your answers under timed conditions.

Start Timer

Behavioral Mastery

Ace tricky behavioral interviews with our AI-powered practice module.

Master Answers

Question Journal

Confidentially record interview questions you were asked for future reference.

Open Journal

Interview Ace

A comprehensive tool to help you master every aspect of your interviews.

Become an Ace

Q&A Logs

Confidentially track your answers to common questions and refine them over time.

View Logs

Application Planner

Schedule and organize your job applications in one confidential planner.

Open Planner

Cover Letter Tool

Create perfect, tailored cover letters for each application with AI support.

Generate Letter

Resume Score

Get instant feedback on your resume with our NLP-supported analysis tool.

Check My Score

ATS Score

Check your resume's compatibility with Applicant Tracking Systems (ATS).

Check ATS Score

Application Analyzer

Use AI to analyze job descriptions and optimize your application materials.

Analyze Application

Career Visualizer

Confidentially plan and visualize your long-term career path and goals.

Visualize My Career

Offer Genius

Get intelligent insights and strategies to confidently negotiate job offers.

Negotiate Offers

JobFlow

Track your entire job search progress from application to offer with this intelligent tool.

Track My Flow

JobSense

Our intelligent matching engine that provides smart job recommendations.

Get Smart Matches

Networking Toolkit

Tools to build and manage your professional connections. All data is confidential.

Build Network

Professional CV

A classic, O*NET supported template for corporate and professional roles.

Use This Template

Executive CV

A premium, O*NET supported template designed for senior and C-level positions.

Use This Template

Modern CV

A fresh, stylish, O*NET supported template perfect for tech and modern industries.

Use This Template

Creative CV

A visually distinct, O*NET supported template for design and artistic roles.

Use This Template

Minimalist CV

A clean, simple, O*NET supported template that focuses purely on content.

Use This Template

Europass CV

The standard European Union recommended format for wide compatibility.

Use This Template

Student CV

An institution-recommended template perfect for internships and first jobs.

Use This Template

Graduate CV

An institution-recommended template for recent graduates entering the workforce.

Use This Template

Academic CV

The researcher-recommended format for roles in academia and research.

Use This Template

Developer/IT CV

A tech-savvy recommended template to highlight your technical skills.

Use This Template

Skilled Worker CV

A trades-recommended template to showcase hands-on skills and experience.

Use This Template

Monochrome CV

A sleek, black-and-white, O*NET supported template for a professional look.

Use This Template

Art CV

An artist-recommended template that allows your creativity to shine.

Use This Template

Harvard CV

A researcher-recommended template based on the classic Harvard format.

Use This Template

Volunteer Research

Help us improve our platform by joining our community research program.

Join Research

Review Us

Share your experience with our tools to help other job seekers.

Share Experience

Register

Create your free account to save jobs, build your profile, and track applications.

Create Account

Login

Access your dashboard, manage applications, and continue your job search.

Access Your Account

Profile Builder

Create a comprehensive professional profile that attracts recruiters and showcases your skills.

Build Your Profile

View Profile

See your public profile exactly as employers will see it. Make sure it's perfect.

Preview Profile

Bookmarked Jobs

Keep track of all your saved job opportunities in one organized place.

View Saved Jobs

Your Reviews

View and manage all the company reviews you've submitted.

See Your Reviews

Following

Manage the list of companies you follow to stay updated on their new openings.

Manage Following

Find Companies

Discover and research top employers in your country and industry.

Discover Employers

Standalone CV Builder

Use our O*NET supported CV builder to create a professional resume from scratch.

Build Your CV

PDF to DOC (Beta)

Convert your PDF resumes or documents into editable Word (DOC) format.

Convert PDF

DOC to PDF (Beta)

Create universally compatible PDF documents from your Word (DOC) files.

Create PDF

General FAQ

Find answers to common questions about our job site and platform.

Read FAQ

Job Seekers FAQ

Get help and find answers to questions specifically for job seekers.

Get Help

Job Matching

Learn about the technology and algorithms behind how we match you to jobs.

Learn How

Personalized Matching

Discover how we use your profile and activity to provide customized job suggestions.

Learn More

Quick Apply

Understand our fast application process and how to make the most of it.

Learn More

Alert Frequency

Learn how to manage your job alert settings so you get the updates you want.

Manage Settings

Job Alerts Guide

A complete guide to understanding how job alerts work and how to use them effectively.

Read Guide

Resume Matching

Learn how our system matches your resume to job requirements.

Learn More

Ethical Branding

Read our guide to building a professional and ethical personal brand.

Read Guide

Candidate Visibility

Learn how to increase your visibility to recruiters on our platform.

Increase Visibility

Verified Badge

Find out how you can get a verified badge to build trust with employers.

Get Verified

AI ATS Technology

Learn about the advanced AI and ATS technology that powers our platform.

Learn More

ATS Ranking

Understand how Applicant Tracking Systems rank you as an applicant.

Learn More

Semantic Matching

Learn how our AI-powered semantic matching goes beyond keywords.

Learn More

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