10 of 10 Permanent Senior Software Engineer Jobs in Basildon

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 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 ...

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/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 ...

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 ...

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 ...

Role: AWS Software Engineer Location: UK (Remote) Type : Permanent Job Description: • Design, develop, and maintain scalable backend services on AWS. Build event-driven architectures using SQS, Kafka, Kinesis, or RabbitMQ. • Develop high-performance applications using Scala. • Design and integrate data solutions using SQL and NoSQL databases (e.g. ...

Title: Forward Deployed Engineer – AI & Customer-Facing Technical Leader Location: Remote Travel: Customer visits 4–5 days/month; occasional team gatherings Salary: Senior: €130–150k base + growth trajectory Principal: €160–200k base + package discussion Tech: Python, JavaScript, Azure, AWS, AI, LLM's, RAG Industry … Consultancy The Role We're looking for talented engineers to join our customer-facing AI practice, from Senior Forward Deployed Engineers through to Principal-level AI technical leaders. You'll work directly with clients to uncover problems, build prototypes, and guide full AI-enabled solution lifecycles. This ...