1,937,568+ Lead Software Engineer Full Stack Java React Jobs in UK — Top Companies Hiring July 2026

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Application Software Engineer

The OpportunityJoin a team at the forefront of underwater robotics innovation. In this role, you'll design and deliver cutting-edge software solutions that power the next generation of subsea vehicles. Working at the intersection of advanced engineering and real-world application, you'll contribute to sy ...

Flight Software Engineer

Flight Software EngineerLocation: CaliforniaBuild the Software That Powers Space MissionsOur client is an innovative and rapidly growing space company developing next-generation spacecraft and satellite technologies. Their missions are shaping the future of space exploration, communicatio ...

Software Engineer SC

Software EngineerHybrid - 2 days per week onsite in either Romsey / Gloucester / WokingUp to £60,000 per annum + benefitsSC clearanceWe are looking for a talented Software Engineer to join a cutting-edge team developing software for RF communication and sensor-based products. You' ...

Embedded Software Engineer

Embedded Software EngineerCardiff26959/580£40,000 - £45,000 & Bonus, Healthcare plan and moreBenefits Package:o £40,000 - £45,000 starting salaryo Company bonuso Group Pension Schemeo Private Medical Scheme including Healthcare Cash Plano Life Assurance ...

Software Applications 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 growing at pace, ...

Software Engineer RTOS

Software Engineer required for long term contract based on site in Stevenage (Bolton could also be considered)Skillset/experience required:Experience in the development of embedded software with C, C++ (Ada experience could also be beneficial, but not essential). It would be desirable for you to ...

Principal Software Engineer

Principal Software EngineerLocation: Portsmouth with a hybrid working ( 3 days in the office)Salary: From £60K - £80K, depending on experience, many benefits including pension, 25 days holiday and life insurance.Our client is a growing software and data science consultancy, The team is de ...

Software Test Engineer

Our client, a leader in the defence and security sector, is currently seeking a Software Test Engineer for a contract position in Stevenage. This role is integral in designing and developing test equipment software for cutting-edge missile systems and sub-components. Our client's dynamic and innovative team acro ...

Principal Software Engineer

Lead Software Engineer£75,000 to £85,000 + Private Healthcare + Enhanced PensionSouthampton (Hybrid, 4 days per week in the office)Are you a senior software engineer looking to take end to end ownership of a complex, real-time distributed platform that integrates directly with mission-critical ha ...

C++ Software Engineer

An award-winning Technology Company seeks a C++ Software Engineer with proven industrial experience of object-orientated programming and design patterns to join their expanding team.You’ll work across the full development lifecycle with a focus on efficient algorithms, robust system design and maintainab ...

Senior Software Engineer

Lead Backend Software Engineer – Data ServicesFederated Data Services | Distributed Systems | Apache Spark | DataFusion | Python | KubernetesLocation: London (2 days per week onsite)Rate: £700–£800 per day (Outside IR35)Duration: Initial 6-month contract with likely extensionOverview< ...

Senior Software Engineer

Senior Software Engineer | Northamptonshire | £50,000 - £70,000Working Pattern: Primarily onsite (hybrid working may be available once established in the role)Build Products That Solve Real-World ProblemsIf you enjoy building complete products, not just isolated software components and wa ...

Senior Software Engineer

Senior .NET Developer, Cheshire, Hybrid, £50,000 to £60,000A growing business based in Cheshire is looking for a Senior .NET Developer to join its engineering team. This role offers the opportunity to work across a mix of greenfield development and improvements to existing platforms while helping shape t ...

Automation Software Engineer

Automation Software Engineer - Python | AWSTechnical Lead | Senior Developer | Infrastrutucre Automation | IaCSouthampton, HampshireHybrid, 2 days a week onsite£80k-£100k plus 8% bonus, pension, healthcareAre you a software engineer who loves solving infrastructure challenges thro ...

ADA Software Engineer

Software Engineer ADABristol (onsite) Initial 6-month contract£68ph, UMB, inside IR35SC must be in place prior to starting the contractOverview of department:We're a driven team with a passion for software and its successful deployment in battlespace Command and Control (C ...

Robotics Software Engineer

New Robotics Software Engineer role - Leading UK Business Saas Software Company - Bristol - Up to £45kWe are recruiting for a Robotics Software Engineer to join a growing team in central Bristol. They are based in beautiful offices in Central Bristol.The company make a SaaS platform specialising ...

Software Engineer ADA

Software Engineer (Ada / C++)Location: Bristol (Full-Time Onsite) Contract: Initial 6-Month Contract (High chance of extension) IR35 Status: Inside IR35 Rate: Up to £70 per hourWe're supporting a leading engineering and technology organisation in the search for a Software Engineer to ...

ADA Software Engineer

On behalf of our client, we are seeking to recruit an Ada Software Engineer on an initial 6-month contract. As the Ada Software Engineer, you will join a small, skilled team developing middleware solutions for next-generation missile systems, working across a range of software from hardware drivers to web servic ...

ADA Software Engineer

World Class Defence Organisation based in Bristol is currently looking to recruit an ADA Software Engineer subcontractor on an initial 6 month contract, with very likely extension. The role will be onsite 4 days per week. A 4 day working week is OK (Monday to Thursday). Rate: £68.00 per hourOvertim ...

C++ Software Engineer

C++ Software Engineer, Cambridge (on-site) An established Cambridge engineering company designing advanced imaging and sensor systems is looking for a C++ Software Engineer to join its in-house development team. Their technology is used by defence, security and industrial customers internationally, and is bu ...

Embedded Software Engineer

YT Technologies has partnered with a premier, highly successful manufacturer of medical devices and life-changing mechatronic products.They are looking for their first dedicated Senior Embedded Software Specialist to act as the primary software authority within their multidisciplinary engineering hub in ...

Senior Software Engineer

Senior Software Engineer / Senior Software Developer / Software Technical Leader A Senior Software Engineer / Senior Software Developer / Software Technical Leader is required to join a leading global manufacturer in a senior hands-on software leadership role focused on the design, architecture and deliv ...

Senior Software Engineer

Senior Software Engineer (.NET / AWS)Location: Manchester / HybridSalary: Up to £75,000 + benefitsThe RoleWe are looking to hire experienced Senior Software Engineers to join a growing engineering function. You'll play a key role in designing and building scalable, cloud-native applic ...

Software Testing Engineer

Exciting opportunity to join the Integration and Systems Validation (ISV) team within the Weapon System Simulation and Experimentation (WSSE) department.Join us in driving innovation and excellence in the field by providing systems integration and testing for digital simulation and experimentation produc ...

HPC Software Engineer

Role:Location: Working Arrangement:Salary:Up to £[Bulk of Job Ad]We welcome diverse applicants and are dedicated to treating all applicants with dignity and respect, regardless of background. ...

Software Engineer Displays

Software Engineer - Marine Displays - 6 month contractOur client delivers navigation solutions to commercial and defence maritime operators worldwide. We're looking for a Software Engineer to join our Engineering Department in New Malden, developing the Windows-based display applications that sit on the ...

Senior Software Engineer

Senior Software Engineer (PHP / Laravel) £50-60,000 Lincoln (office based 5 days per week)Full Time | PermanentThere's something quite rewarding about working on a platform that sits right at the centre of how an organisation operates. This is one of those environments where the technology re ...

Software Security Engineer

Stevenage Would you like to be part of a group of specialist engineers helping to deliver some of the world's most sophisticated defence systems? We are currently recruiting for a software security expert, to work across a range of our products!Salary: Circa £74,000 depending on experience<br ...

Software Engineer C++

At Decisal we develop software that enables airlines around the world to optimize and analyze their planing and scheduling. We are currently expanding our products and seeking a talented and passionate Software Engineer C++ to join our dynamic team.As a Software Engineer C++, you will play a key role i ...

Software Engineer (AI)

Let’s transform the business of healthcare! At The Craneware Group, we are dedicated to empowering our customers with industry-defining insights that pave the way for a brighter future. If you are an innovative, curious, and forward‑thinking engineer with a passion for AI, we invite you to join our ...

Senior Software Engineer

We're looking for a Senior Software Engineer to join our team and take our technology and your career into new territories! MBDA is a great a place to learn about the company's entire product portfolio, whilst embracing the change to DevOps and other innovative technologies!Salary: £40,000-£75,000 depend ...

Software QA Engineer

Excellent opportunity for a Software QA Engineer to join brilliant client's team based in Brighton. As a Software QA Engineer, you will be responsible for introducing and maintaining new technologies whilst utilising the latest industry software and practices. You'll become a vital part of an already successful ...

Embedded Software Engineer

Senior Embedded Software Engineer - Connected Devices & IoTLocation: Battersea, London (5 Days Onsite)Salary: £70,000 - £90,000 We're looking for a Senior Embedded Software Engineer to join a growing engineering team developing connected products deployed at scale.This is a ha ...

Senior Software Engineer

Senior Software EngineerCrewe - 3 days per week onsite.Looking to lead — but still love being hands-on?This role is ideal for a Senior Developer stepping into leadership or a Lead Engineer who doesn’t want to move away from coding.You’ll be joining a well-established organisation ...

Software Test Engineer

Software Test EngineerCertain Advantage is hiring for a Software Test Engineer based in the Guildford or Newcastle area.This role is on a contract basis and is hybrid-based.The CompanyWe’re working with a Manufacturing business that operates in the Aerospace sector. They design, manufacture a ...

Senior Software Engineer

We are supporting a pioneering biotech company based in Cambridge who are looking to add a Senior Software Engineer to their growing team. This is a full-time permanent position.Key responsibilities will include: * Take ownership of the design, development and testing for software applications.< ...

C# Software Engineer

This C# Software Engineer role sits at the heart of serious manufacturing automation. You’ll be building and improving software that talks directly to a wide range of real-world equipment including power supplies, acquisition systems, cameras and test hardware - with plenty of scope for developing skills in para ...

Junior Software Engineer

Junior Software Engineer (C / C++)Location: Newbury, Berkshire (Hybrid: 2 or 3 days in)Type: Permanent Salary: £32-45kNOTE: This role would suit a graduate software engineer with at least 2-3 years of relevant industry experience.A small engineering company developing bespoke instrumentation, ind ...

Software Engineer Solana

The world of digital assets is accelerating in speed, magnitude, and complexity, opening the door to new ways for leveraging the blockchain. Fireblocks’ platform and network provide the simplest and most secure way for companies to work with digital assets and it trusted by some of the largest financial in ...

Chief Software Engineer

Job Description: Salary Range: £80,000 - £90,000 Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external mark ...

Chief Software Engineer

Job Description Salary Range: £80,000 - £90,000 Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external marke ...

Senior Software Engineer

The Opportunity We're looking for a Software Engineers and Senior Software Engineers with strong software development experience across the full development lifecycle to design and develop the software that powers advanced electro-optical systems used in Air Defence, cUAS and Surveilla ...

Senior Software Engineer

Senior Software Engineer - Buckinghamshire, Hybrid Bright Purple are supporting an ambitious product company looking for a Senior Software Engineer to play a key role in the development and evolution of a critical business platform. Alongside hands‑on development, you'll introduce m ...

Senior Software Engineer

Location London Address London, England Employment Type Full time Location Type Hybrid Department Engineering Our Mission At Carbon Re, we’re on a mission to cut gigatonnes of carbon emissions from the world’s biggest emitting ...

Lead .Net Software Developer

Senior .Net Developer | Full Stack Engineer - Build the Future of Data Lineage & AI London (Hybrid) | High -I mpact SaaS Engineering Role C#, ASP.Net Core, TypeScript, React, Computer Science Company Size: Approx. 60 ...

Senior Software Engineer (C++/Python) — Full SDLC, Flexible Hours

Premier IT, a well-established global engineering company in Greater London, seeks a Senior Software Engineer to oversee software development throughout its lifecycle. This role involves developing cutting-edge products and enhancing existing systems, while collaborating with external stakeholders. The ...

Lead Software Engineer: Front Office & AI (Hybrid/London)

Saragossa, a credit-focused asset manager in Greater London, is seeking a software engineer to take technical ownership and drive AI exploration. In this hybrid role, you will lead projects that directly impact investment decisions using technologies like C#, Azure SQL, and React or Angular. The ideal ...

Senior Staff Engineer Market Making & Real Time Systems

FanDuel is looking for a Senior Staff Software Engineer to lead and empower a multidisciplinary team, tackling complex challenges that enhance experiences for millions of players. This role requires strong leadership, technical decision-making, and excellent communication skills. The ideal candidate wi ...

Technical Lead: Hands on Cloud Native Leader (Hybrid, London)

Consortia Group is seeking a Technical Lead in London to lead a squad of developers while remaining hands-on with coding. This role offers excellent growth opportunities as you contribute to architecting and improving cutting-edge solutions in the Fintech space. As the Technical Lead, you'll oversee pr ...

Hybrid Senior Quantitative Software Engineer: Trading Algo

Morgan Stanley is looking for a Senior Quantitative Software Engineer in Greater London. You will lead the development of innovative solutions while optimizing trading algorithms and managing operational risks. Applicants should have at least 8 years of relevant experience, strong programming capabilities in ...

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    Lead Software Engineer Full Stack Java React Jobs in United Kingdom Job Search Guide, Trends and Insights