1,010,684+ Lead Software Engineer Full Stack Java React Jobs in UK — Top Companies Hiring July 2026

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Design Engineer Plastic Parts

Design Engineer Plastic Parts (F/M)We are looking for an experienced Design Engineer (F/M) for plastic parts for the Global Plastic Group Design department at Sartorius Stedim FMT S.A.S. in Aubagne. In this role, you will be responsible for designing mainly injection-moulded components for the bio ...

Senior Test Automation Engineer for NATO with security clearance

Remote | NATO Secret Clearance Required | Occasional Travel to The HagueWe are supporting NATO in the continued development and validation of NIRIS (Networked Interoperable Real-Time Information Services), a critical interoperability platform used within multinational defence environments.We are ...

Founding Product Engineer, Marketplace

Location: London (Hybrid — The Church, 291 Hackney Road) Type: Full-time | Equity + Salary About Wonder Studios Wonder Studios is an AI-native film and content studio redefining how stories are told. We partner with global brands, artists, and studios to create wor ...

Senior Application Engineer in Cambridge Luminance

Senior Application Engineer Cambridge, United Kingdom Posted 12 months ago Qualifications Experience with server‑side technologies such as Node.js, PostgreSQL, Redis, and Elasticsearch. Familiarity with Python, Java , and front‑end frameworks is also beneficial. < ...

Marketing Automation Specialist

We are seeking a highly motivated Marketing Automation Specialist to join our Marketing Automation team. In this role, you will support marketing processes within our martech stack, including lead routing, building segmentation lists, building emails, auditing 3rd party integrations, list importing, and su ...

Senior Software Engineer OMS Resilience, TDD & CI/CD

Core-Asset Consulting is looking for a Senior Software Engineer in Newcastle upon Tyne to enhance a critical Order Management and Execution System. You will work on code refactoring, test-driven development, and automated testing practices. The ideal candidate will have experience in complex systems, s ...

Senior Software Engineer C#/.NET, Mentoring & Flexible Hours

Microlise, based in West Timperley, is seeking a Software Engineer to join its talented team of 150. This role emphasizes hands-on experience in C# and .NET, alongside opportunities for mentoring and coaching junior staff. The company values a healthy work/life balance with flexible working opportunities and ...

Software Engineer, Data Infrastructure & Acquisition Cardiff, United Kingdom

The mission of Speechify is to make sure that reading is never a barrier to learning. Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember mo ...

AI Software Engineer — Build Next Gen AI Products

Oho Group is seeking an exceptional AI Software Engineer to join their team in Cambridge. You will work on cutting-edge AI features and collaborate with world-class engineers, tackling advanced problems in a dynamic startup environment. This role offers significant ownership and the chance to contribut ...

Senior Software Engineer, Site Reliability Engineering, Cloud IRT

Senior Software Engineer, Site Reliability Engineering, Cloud IRT corporate_fare Google place London, UK Apply Bachelor’s degree in Computer Science, a related field, or equivalent practical experience. 5 years of experience with software development in one or more ...

Senior Software Engineer: Cloud, Data & AI/ML Systems

J.P. MORGAN is seeking a Software Engineer III in Greater London to enhance their Markets Research Technology team. This role demands expertise in software solutions, system design, and data engineering, fostering innovation in AI/ML applications. The ideal candidate will possess strong coding skills, ...

Front Office Software Engineer (Python) — Real Time Trading

United States Digital Space LLC is seeking a Software Engineer to join the Data Science & Technology team. The successful candidate will build scalable Python services and partner with traders to enhance trading processes and analytics solutions. This role offers a dynamic work environment with opportu ...

Remote Senior Software Engineer II: Cloud Native APIs

Menlo Security is searching for a Senior Software Engineer for the Service Delivery team, offering remote or on-site work in Bracknell, UK. This full-time role focuses on building robust APIs and microservices to enhance interactions with our platform. Candidates should have at least 7 years of softwar ...

R&D LabVIEW Software Engineer: Embedded + Raman Systems

Agilent Technologies is looking for a LabVIEW Software Engineer to develop cutting-edge software for Raman Spectroscopy products at their Harwell office in the UK. This permanent role offers the chance to work collaboratively in a cross-functional R&D team and be part of exciting projects that improve global ...

CIAM Software Engineer — Authn/Authz & OAuth2 Expert (Remote)

Sanderson is seeking a skilled CIAM Software Engineer to be part of a major technology transformation program in Cardiff. This role involves delivering secure and seamless customer identity experiences while collaborating closely with various teams to create modern authentication solutions. The ...

Senior Software Engineer Backend & Infrastructure (f/m/d)

London, England, United Kingdom About the Opportunity As a Senior Software Engineer focused on content storage infrastructure domain you will be responsible for innovating and maintaining Contentful’s underlying storage infrastructure and adjacent services. You wil ...

Senior C/C++ Software Engineer – Defence (SC/DV)

A leading defence software company in the UK is seeking a Senior Software Engineer to take ownership of delivering robust software into regulated, high-assurance environments. Applicants must have deep expertise in C/C++ and a proven record in safety-critical systems. The role demands strong technical skills and ...

Senior Software Engineer — End to End, AI Driven

Opus 2 in Edinburgh is seeking a Senior Engineer to lead complex projects and enhance team capability. This role focuses on full-cycle engineering with an emphasis on using AI tools effectively. You'll shape the engineering strategy and mentor others, with a commitment to quality and operability in a fast-pac ...

Defence Software Engineer — Hybrid Role, SC Clearance Eligible

CBSbutler Holdings Limited trading as CBSbutler is seeking a Software Engineer to join their defence and national security consultancy. The role involves software design, implementation, and testing within an agile team. Candidates should have a relevant engineering or computer science degree and experience i ...

Senior Embedded Software Engineer: Real Time C & Mentoring

QinetiQ is seeking a Senior Embedded Software Engineer at our Ashford site to design and implement embedded software for safety-critical systems. You will be responsible for full lifecycle development, mentoring junior engineers, and ensuring high-quality documentation. Required qualifications include a degree i ...

Senior Embedded Software Engineer Real Time Linux/FPGA

A leading technology organization based in North Somerset is seeking an experienced Senior Embedded Software Engineer to design and develop embedded software for advanced engineering systems. The ideal candidate will have strong experience with Linux-based platforms and real-time environments, collaborating with ...

Frontier Tech Software Engineer: Prototyping in Rust/C++

Crypto Pro Network is seeking a Software Engineer to join their Global Technology Applied Research team in London, UK. In this role, you will collaborate on innovative prototypes, develop algorithms in Rust or C++, and deliver solutions that shape the industry. You’ll thrive in a dynamic environment, b ...

Software Engineer AI Platform & End to End Build

Dex is looking for an engineer in Greater London to take full ownership of building and deploying AI solutions across B2B SaaS businesses. You'll work on everything from architecture to production, building core platforms and integrating them with operational intelligence. The ideal candidate has 2-5 y ...

Graduate Software Engineer — Real World Impact & Elite Training

targetjobs UK is offering a graduate software development role at BAE Systems with a starting salary of £34,000 and a £2,000 welcome payment. As a graduate, you will create cutting-edge software and manage the full product lifecycle, ensuring complex real-world systems work flawlessly. The program offe ...

Senior Software Engineer eBPF Security for Embedded & Cloud

Cisco Systems Inc in the City of Westminster is looking for a Tetragon software engineer to develop and enhance the Tetragon agent across various embedded platforms and cloud environments. You will be responsible for implementing advanced security mechanisms and improving network parser capabilities. T ...

Senior Software Engineer I Personal & Business Pricing Team

Wise is a global technology company, building the best way to move and manage the world’s money. Job Description We are looking for a passionate Software Engineer to join the Personal & Business Pricing Team . This role offers an opportunity to have a direct and measurable impact o ...

Senior Software Engineer Hybrid Cloud UI/UX & Security

IF1874 GE Energy Power Conversion UK Limited is looking for a developer in Rugby to focus on the frontend and backend of our core security software solution. The role offers a collaborative agile environment, where you will create UI/UX wireframes and technical documentation while ensuring compliance with ind ...

Software Engineer, iOS Core Product Bristol, United Kingdom

The mission of Speechify is to make sure that reading is never a barrier to learning. Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember mo ...

Senior Software Engineer – AI Tools & Real Time Data

DraftKings Inc. is seeking a Senior Software Engineer which will involve building scalable data-driven systems for real-time experiences. The ideal candidate should have 4+ years of software engineering experience and be proficient in Python. Responsibilities include designing tools, leading technical strateg ...

Senior Software Engineer — Real Time Routing & Growth ML

Relay Technologies is seeking a Software Engineer to tackle impactful problems from routing algorithms to real-time optimization services. You will work closely with a talented team of engineers, shipping production-level code that enhances user experiences on platforms like Vinted and TikTok. The role ...

Research Software Engineer User Configurable AI Ready Datasets

Your role We are looking for a Research Software Engineer (A2) to work on the development of data infrastructure services to support Machine Learning (ML) efforts within the European Union’s Destination Earth (DestinE) initiative. the company produces world‑leading scientific data ...

Staff Software Engineer Fintech, AI Driven & Hands On

SwiftCruit is looking for a Software Development Engineer based in Greater London. This role requires strong coding skills and experience with modern tools to improve software applications in the fintech sector. Applicants should have at least 5 years of relevant experience or an applicable advanced de ...

Software Engineer, STV (9 month Fixed Term Contract)

STV is Scotland’s leading digital media brand. Each month, our commercial broadcast channel reaches 3.5 million viewers and the STV Player is the fastest growing Video on Demand service in the UK. This role is a unique opportunity to work on a multi‑platform product that reaches a huge national audience ac ...

Mobile Software Engineer (£40k–£45k + Equity) at Cauli

Job Title Mobile Software Engineer Salary £40,000–£45,000 + Equity Company Description Cauli is the UK's largest reusable packaging provider, led by Forbes 30 Under 30 CEO Josephine Liang. They utilize IoT and AI-driven technology to replace single-use waste at ...

AI Native Junior Software Engineer Remote & Flexible Hours

A leading cleaning services platform in London is seeking a Junior Software Engineer to solve complex problems and build scalable platforms. You will work with a variety of technologies such as Python, Django, and Angular, and contribute to improving user experiences. The ideal candidate will have a strong educa ...

Senior Software Engineer — AI/ML Backend & Data Pipelines

Datalex is seeking a Senior Software Engineer specializing in Python-based AI/ML development to design and deploy machine learning features. The role involves building APIs, collaborating on CI/CD, and mentoring Junior Engineers. Candidates should have 8+ years of experience, strong knowledge of AI technologies, ...

Global PLC Software Engineer — Travel & 47 Days Holiday

Samuel Frank is recruiting for a PLC Software Engineer to work in Gloucester, close to the Cotswolds. This role involves PLC, HMI, and motion control programming for specialized machinery, along with international commissioning work. The position offers a competitive salary of £60,000 plus bonuses and ...

Global PLC Software Engineer Travel, HMI & Motion Control

Samuel Frank in Gloucester is looking for a PLC Software Engineer to design and build bespoke machinery for a global customer base. This role combines software development, machine support, and international commissioning work, offering a balanced work pattern of 9 working days every 10. The successful ...

Senior Embedded Software Engineer – Real Time Motor Control

This job is brought to you by Jobs/Redefined, the UK's leading over‑50s age‑inclusive jobs board. The Role We have an exciting opportunity for a Senior Embedded Software Engineer to develop solutions for real‑time control of power electronics and motor drives. You will join a dynamic and ...

Software Engineer – Commercial Modification (Associate or Experienced level)

At Boeing, we innovate and collaborate to make the world a better place. We’re committed to fostering an environment for every teammate that’s welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us. The Team The Software Engineering a ...

Software Engineer – Commercial Modification (Associate or Experienced level)

Job Description At Boeing, we innovate and collaborate to make the world a better place. We’re committed to fostering an environment for every teammate that’s welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us. The team ...

Senior Software Engineer – Scale Up in Manchester (Hybrid)

Morson Edge (Technology) is seeking a Senior Software Engineer to join their private equity backed tech company in Manchester. The ideal candidate will work within a product-based team and engage in all stages of system development, from design to production support. This role offers a competitive sala ...

Hybrid Software Engineer: Embedded & UI (C#/C++/Python)

CBSbutler Holdings Limited trading as CBSbutler is seeking a talented Software Engineer to join their innovative team developing RF communication and sensor-based products. This hybrid position allows for work in Romsey, Gloucester, or Woking two days a week, with a competitive salary up to £60,000 per annum ...

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