Full Stack Engineer; TDD​/C# ​/JavaScript

Full Stack Engineer (TDD / C# / JavaScript)

We are hiring a Full Stack Software Engineer with a strong test‑driven development (TDD) background to help build the next generation of a mission‑critical cybersecurity and communications platform used globally.

This is a hands‑on role focused on designing and delivering partner API integrations across a complex security ecosystem - including endpoint protection, network security, user awareness tooling, and monitoring systems.

You’ll work as part of a collaborative product team alongside full stack and front‑end developers, supported by QA and Dev Ops, reporting into engineering leadership.

The next‑generation platform will provide customers with a unified view of security across distributed environments. As integrations expand, maintaining a high bar for quality, reliability, and test coverage is critical.

This role will also play a key part in strengthening TDD practices across the team - leading through code and delivery.

• Design and build API integrations across a cybersecurity‑focused product stack
• Deliver clean, maintainable full stack solutions using .NET and modern JavaScript frameworks
• Lead by example in test‑driven development practices
• Integrate third‑party systems using REST APIs, OAuth2, webhooks, and resilient patterns
• Contribute to a scalable, observable integration layer
• Collaborate with Product, QA, and Dev Ops to deliver high‑quality releases
• Use AI‑assisted development tools as part of your daily workflow

• Experience with C# / .NET Core
• Strong experience with ASP.NET Core / Web API
• Modern JavaScript / Type Script experience
• Experience with a component‑based SPA framework (e.g. Vue, React, or Angular)
• Proven, hands‑on test‑driven development experience
• Strong experience integrating third‑party APIs (REST, OAuth2, webhooks, retries, rate limiting)
• Solid SQL skills (e.g. Maria
  
  DB or MySQL)
• Experience with Git workflows (branching, pull requests, code reviews)
• Regular user of AI‑assisted development tools (e.g. Claude Code, Cursor, Copilot or similar)
• Strong ownership mindset and commitment to quality

• Commercial experience integrating AI APIs (e.g. Claude, Bedrock, OpenAI or similar)
• Experience with AWS (e.g. EC2, RDS, Lambda, S3)
• Microservices or distributed systems experience
• Familiarity with iterative product development methodologies
• Awareness of secure‑by‑design principles (e.g. ISO 27001)
• Background in SaaS or cybersecurity environments

• Hybrid working
• Excellent career development / Training budget
• Flexible working

If you take pride in writing well‑tested, production‑grade code and want to contribute to building critical cybersecurity software used at global scale, we’d love to hear from you.