Software Engineer (Backend / Full-Stack) - Go, X.509, React

Software Engineer (Backend / Full-Stack) - Go, X.509, React £40,000 - £70,000 DOE + Benefits Fully Remote (UK) About the Company Join an innovative technology organisation operating at the cutting edge of secure communications and connectivity. Our client develops next-generation communications solutions for organisations operating within highly secure, mission-critical environments. Led by an exceptional engineering team, they are redefining how secure communications platforms are designed, deployed and managed. Their technology is already trusted by organisations operating within some of the world's most demanding sectors, and with continued international growth, this is an excellent opportunity to join the business at an exciting stage of its journey. The Opportunity As a Software Engineer, you will play a key role in designing, developing and enhancing business-critical applications and services. Working across backend and full-stack development, you'll help deliver secure, scalable solutions while collaborating with a talented team focused on solving complex technical challenges. What You'll Be Doing

• Designing and developing backend services using Go
• Building and enhancing RESTful APIs
• Creating and maintaining PostgreSQL databases and data models
• Developing real-time and event-driven platform capabilities
• Implementing secure authentication and communication mechanisms
• Building React-based interfaces and operational dashboards
• Supporting automated testing and CI/CD processes
• Contributing to solution design and technical architecture decisions
• Developing and extending internal tools and platforms
• Collaborating with engineering teams across software, networking and infrastructure

About You Backend Development

• Commercial experience developing applications in Go (Golang)
• Strong REST API development experience
• PostgreSQL database experience
• Knowledge of ORM frameworks, ideally GORM
• Understanding of concurrent programming concepts including goroutines, channels and mutexes
• Experience with Docker and containerised applications

Frontend Development

• React development experience
• Knowledge of React Hooks including useState, useCallback and useMemo
• Modern JavaScript development (ES6+, async/await)
• Experience integrating APIs using Axios or similar tools
• Experience with modern CSS frameworks, ideally Tailwind CSS

Desirable Experience

• mTLS and X.509 certificate management
• HashiCorp Vault, Consul or Terraform
• InfluxDB
• Server-Sent Events (SSE) and WebSockets
• Networking or embedded systems exposure
• Data visualisation tools such as Recharts or D3
• Distributed systems and scalable architectures

Additional Requirements

• Must be eligible and willing to undergo security clearance
• Sponsorship is not available for this position

What We Offer

• Salary of £40,000 - £70,000 depending on experience
• Fully remote UK-based role, although there may be the occasional opportunity to meet with colleagues in London
• Flexible working arrangements
• Exposure to interesting engineering challenges
• Modern technology stack and tooling
• Opportunity to influence technical direction and product evolution
• Collaborative and highly skilled engineering environment

How We Work High Ownership We empower engineers to take responsibility for their work from concept through to deployment and ongoing improvement. Resourcefulness We value people who solve problems creatively and pragmatically while delivering meaningful results. Collaboration We encourage open communication, shared learning and cross-functional teamwork across software, networking and infrastructure. Excellence Our customers rely on secure, resilient communications where reliability matters. We take pride in delivering high-quality solutions and maintaining high engineering standards. Have We Got Your Attention? If you're excited by the opportunity to work on cutting-edge secure communications technology and solve complex engineering challenges, we'd love to hear from you. Apply via the link as soon as possible to avoid missing out on this fantastic opportunity. About Adecco Adecco is acting as an Employment Agency. We are proud to be an Equal Opportunities Employer and are committed to creating an inclusive recruitment process for all applicants. We are on the client's supplier list for this role. Keywords: Go, Golang, Gin, REST API, PostgreSQL, GORM, Docker, React, JavaScript, ES6, Axios, Tailwind CSS, JWT, mTLS, X.509, Terraform, Vault, Consul, InfluxDB, WebSockets, SSE, CI/CD, Microservices, Cloud Native, Distributed Systems, Secure Communications, Full Stack Developer, Backend Engineer, Remote Software Engineer, Platform Engineering