1 to 25 of 38 Senior Software Engineer Jobs in Essex

Senior Software Engineer Salary: £55,000 - £65,000 Location: Birmingham (Hybrid - 2 days per week in office) Industry: Sustainable Technology/Data & Analytics Platforms The Opportunity I'm recruiting for a growing Birmingham-based tech company that's building open, scalable software used to power data … driven platforms in the sustainability and energy space. This is an exciting opportunity for a Senior Software Engineer who wants to work on meaningful products, influence technical decisions, and be part of a team that genuinely values good engineering. You'll be joining a close-knit engineering ...

Senior Software Engineer (Blockchain) Location: Remote Salary: Up to £120,000 + Bonus Are you ready to shape the future of digital finance? We're partnering with a pioneering organisation at the forefront of blockchain innovation to find a Senior Software Engineer who thrives … with cross-functional teams to ensure compliance, scalability, and security. Drive engineering excellence through best practices, testing, and mentorship. What We're Looking For: Senior level experience in fullstack and blockchain engineering. Deep expertise in Solidity, TypeScript, and EVM-based smart contract development. Strong understanding of DeFi primitives, stablecoin ...

Senior Software Engineer (Blockchain) Location: Remote Salary: Up to £120,000 + Bonus Are you ready to shape the future of digital finance? We're partnering with a pioneering organisation at the forefront of blockchain innovation to find a Senior Software Engineer who thrives … with cross-functional teams to ensure compliance, scalability, and security. Drive engineering excellence through best practices, testing, and mentorship. What We're Looking For: Senior level experience in fullstack and blockchain engineering. Deep expertise in Solidity, TypeScript, and EVM-based smart contract development. Strong understanding of DeFi primitives, stablecoin ...

Senior Software Engineer (Blockchain) Location: Remote Salary: Up to £120,000 + Bonus Are you ready to shape the future of digital finance? We're partnering with a pioneering organisation at the forefront of blockchain innovation to find a Senior Software Engineer who thrives … with cross-functional teams to ensure compliance, scalability, and security. Drive engineering excellence through best practices, testing, and mentorship. What We're Looking For: Senior level experience in fullstack and blockchain engineering. Deep expertise in Solidity, TypeScript, and EVM-based smart contract development. Strong understanding of DeFi primitives, stablecoin ...

experts in what we do and are looking for more brilliant people to join our team. The Role We are looking for an experienced Senior Software Engineer – ATE to take a technical role in developing and maintaining automated test systems used to validate our advanced embedded computing … exacting standards for performance and reliability and to support the rapidly growing production of our products. What will I be delivering? As a Senior Software Engineer within the ATE team, you will be responsible for the design, architecture, and implementation of complex automated test software solutions. ...

Senior C++ Software Engineer (Remote – Anywhere in Europe) High-impact work. Exceptional teammates. Real work–life balance. Looking for a role where you can work fully remote across Europe, collaborate with an outstanding team of C++ engineers, enjoy a genuinely healthy 9–5 schedule, and receive … while solving cutting‐edge technical challenges? If that sounds like your ideal setup, you're in the right place. We're searching for a Senior Software Engineer (3–8 years experience) with strong modern C++ skills who's ready to take ownership of complex projects, push technical ...

Senior C++ Software Engineer (Remote – Anywhere in Europe) High-impact work. Exceptional teammates. Real work–life balance. Looking for a role where you can work fully remote across Europe, collaborate with an outstanding team of C++ engineers, enjoy a genuinely healthy 9–5 schedule, and receive … while solving cutting‐edge technical challenges? If that sounds like your ideal setup, you're in the right place. We're searching for a Senior Software Engineer (3–8 years experience) with strong modern C++ skills who's ready to take ownership of complex projects, push technical ...

Senior Software Developer Java, Spring Boot, Python, AWS, DB2 £475-500 per day, Outside IR35 Starting date: 5th January 2026 Duration: Initially 6 Months (very likely to extend) Fully Remote Unify are proud to be exclusively representing a UK Consultancy partner who urgently requires the services … Senior Software Developer, on an Outside IR35 Contract basis, to join a project team delivering a high profile Government program. Essential Skills & Experience: Software Development Expertise: Proven experience as a software developer, specifically with a background in software upgrades, bug fixes, and addressing vulnerabilities Agile ...

Senior Software Developer Java, Spring Boot, Python, AWS, DB2 £475-500 per day, Outside IR35 Starting date: 5th January 2026 Duration: Initially 6 Months (very likely to extend) Fully Remote Unify are proud to be exclusively representing a UK Consultancy partner who urgently requires the services … Senior Software Developer, on an Outside IR35 Contract basis, to join a project team delivering a high profile Government program. Essential Skills & Experience: Software Development Expertise: Proven experience as a software developer, specifically with a background in software upgrades, bug fixes, and addressing vulnerabilities Agile ...

Senior Software Developer Java, Spring Boot, Python, AWS, DB2 £475-500 per day, Outside IR35 Starting date: 5th January 2026 Duration: Initially 6 Months (very likely to extend) Fully Remote Unify are proud to be exclusively representing a UK Consultancy partner who urgently requires the services … Senior Software Developer, on an Outside IR35 Contract basis, to join a project team delivering a high profile Government program. Essential Skills & Experience: Software Development Expertise: Proven experience as a software developer, specifically with a background in software upgrades, bug fixes, and addressing vulnerabilities Agile ...

Vacancy Are you a Senior Software Developer looking to make a real impact in healthcare technology? Do you want to work on meaningful products that support medical professionals and trainees across the UK? If so, this could be the perfect opportunity for you. We're looking … talented and motivated Senior Software Developer to join the FourteenFish team at Optum UK. You'll be part of a collaborative, forward-thinking group building world-class solutions that improve the lives of healthcare professionals. This role will see you working across our product suite, contributing ...

Vacancy Are you a Senior Software Developer looking to make a real impact in healthcare technology? Do you want to work on meaningful products that support medical professionals and trainees across the UK? If so, this could be the perfect opportunity for you. We're looking … talented and motivated Senior Software Developer to join the FourteenFish team at Optum UK. You'll be part of a collaborative, forward-thinking group building world-class solutions that improve the lives of healthcare professionals. This role will see you working across our product suite, contributing ...

Senior Embedded Software Engineer We are working with a pioneering specialist in rugged, next‐generation low‐light imaging systems, trusted across defence, aerospace, surveillance, and scientific markets to recruit a highly motivated Embedded Software Engineer to join their team. The successful candidate will play … role in designing, developing, and maintaining embedded software solutions for advanced imaging and sensor systems. This role requires strong technical expertise, problem-solving skills, and the ability to work collaboratively in a multidisciplinary environment. Key Responsibilities Develop and maintain embedded software, SDKs, and firmware for imaging systems Integrate ...

Senior Embedded Software Engineer We are working with a pioneering specialist in rugged, next‐generation low‐light imaging systems, trusted across defence, aerospace, surveillance, and scientific markets to recruit a highly motivated Embedded Software Engineer to join their team. The successful candidate will play … role in designing, developing, and maintaining embedded software solutions for advanced imaging and sensor systems. This role requires strong technical expertise, problem-solving skills, and the ability to work collaboratively in a multidisciplinary environment. Key Responsibilities Develop and maintain embedded software, SDKs, and firmware for imaging systems Integrate ...

Senior+ Software Engineer - Python | FastAPI | AWS £90,000-120,000 + Bonus and Stock Flexible benefits | 90 day work-from-anywhere perk Python, FastAPI, gRPC, AWS Remote first or hybrid (London) InsurTech | high traffic, scalable, event-driven, microservices development We've partnered with … years. Following a successful profitability push, they're now entering a growth phase and expanding their product offering. As a Lead/Senior+ Software Engineer you'll help drive technical direction and architecture within a product-led squad environment, rotating across business domains. This is an opportunity ...

Senior/Principal Software Engineer .NET £85,000-£110,000 Remote (UK) Do you thrive on building scalable solutions that power commerce worldwide? We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant-centric ecosystem built … quality, resilience, and scale - and they need exceptional .NET Software Engineers to drive this evolution. Your Impact: Design and develop mission-critical platform services, APIs, and merchant portals Drive performance optimisation and system reliability through intelligent engineering Champion engineering excellence in architecture, code quality, and delivery Partner with cross ...

Senior/Principal Software Engineer .NET £85,000-£110,000 Remote (UK) Do you thrive on building scalable solutions that power commerce worldwide? We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant-centric ecosystem built … quality, resilience, and scale - and they need exceptional .NET Software Engineers to drive this evolution. Your Impact: Design and develop mission-critical platform services, APIs, and merchant portals Drive performance optimisation and system reliability through intelligent engineering Champion engineering excellence in architecture, code quality, and delivery Partner with cross ...

Embedded Software Engineer (Contract/Flexible) – Outside IR35 We are a small but established engineering firm looking to engage an experienced Embedded Software Engineer on a flexible, non-committed, Outside IR35 basis. Our existing embedded software contact is no longer available … seeking a trusted, go-to embedded engineer to support our products and future developments on an ongoing basis. This role is ideal for an experienced contractor or freelancer who values autonomy, flexibility, and long-term collaboration without fixed hours or guaranteed workload. The Role Act as the primary embedded ...

Embedded Software Engineer (Contract/Flexible) – Outside IR35 We are a small but established engineering firm looking to engage an experienced Embedded Software Engineer on a flexible, non-committed, Outside IR35 basis. Our existing embedded software contact is no longer available … seeking a trusted, go-to embedded engineer to support our products and future developments on an ongoing basis. This role is ideal for an experienced contractor or freelancer who values autonomy, flexibility, and long-term collaboration without fixed hours or guaranteed workload. The Role Act as the primary embedded ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under tight deadlines ...

looking for an experienced Senior Python Software Engineer to take ownership of an established trading-related application and drive its ongoing development. You will manage and enhance the existing codebase, deliver new features, ensure reliability and performance, and help evolve the system as the business grows. This ...

looking for an experienced Senior Python Software Engineer to take ownership of an established trading-related application and drive its ongoing development. You will manage and enhance the existing codebase, deliver new features, ensure reliability and performance, and help evolve the system as the business grows. This ...

technology. If you love untangling hard problems, improving legacy systems, and shipping clean, tested code, you'll fit right in. Your role as a Senior PHP Software Engineer at True9: Lead the back-end - write clean, maintainable, and scalable code using PHP and frameworks like Symfony across ...

technology. If you love untangling hard problems, improving legacy systems, and shipping clean, tested code, you'll fit right in. Your role as a Senior PHP Software Engineer at True9: Lead the back-end - write clean, maintainable, and scalable code using PHP and frameworks like Symfony across ...

technology. If you love untangling hard problems, improving legacy systems, and shipping clean, tested code, you'll fit right in. Your role as a Senior PHP Software Engineer at True9: Lead the back-end - write clean, maintainable, and scalable code using PHP and frameworks like Symfony across ...