Full Stack Developer

Full Stack Developer focuses on build partner api integrations across gt maritime's cybersecurity stack — endpoint protection, network security, user awareness training, and siem/soc tooling.

What the role involves

• Build partner API integrations across GT Maritime's cybersecurity stack — endpoint protection, network security, user awareness training, and SIEM/SOC tooling.
• Own test coverage, regression strategy, and acceptance criteria validation for integration code.
• Contribute to post-release reviews and continuous improvement of the delivery process.
• Promote secure coding practices and conduct security-focused code reviews aligned with ISO 27001 certification.
• Supporting vulnerability identification and remediation as part of the everyday development workflow.
• Work alongside DevOps to understand and contribute to CI/CD pipelines, AWS resource management, and deployment practices.

Skills and requirements

• 3+ years of hands-on commercial experience building and shipping features in a SaaS environment. C#.
• NET Core is the core backend language. Vue.js with Nuxt 3 is the front-end framework.
• Proven experience with REST, OAuth2, webhooks, rate limiting, and retry patterns. Has integrated with third-party commercial APIs at production scale.
• & — Working knowledge of application security fundamentals and ISO 27001.

Confirmed role details

• Hybrid (Warrington, United Kingdom).
• $200M revenue target by 2026.

Candidate fit

• technical problem-solving, code quality, testing discipline, and clear collaboration

Additional role context

• GT Maritime provides mission-critical maritime cybersecurity and communications software to 2,000 companies and 16,000 vessels worldwide — roughly a quarter of the world's non-navy.
• With 19 acquisitions completed across Canada, the USA, and the UK, Valstone takes a long-term, buy-and-hold approach — building businesses rather than exiting them.
• Sister entities include Valsoft (130+ acquisitions, $3B+ valuation), Permanent Corp, Valnet, and Valsef Capital.