Senior Security Engineer, Crypto

Stack

Responsibilities

• ▹Design, implement, and continuously improve a Secure SDLC integrated from design through production
• ▹Embed security into planning and delivery via threat modelling, security requirements, and automated controls
• ▹Lead application security reviews for new systems, major features, and high-risk changes across web, API, mobile, and backend services
• ▹Define and maintain secure architecture patterns for authentication, authorisation, APIs, data protection, and multi-tenant isolation
• ▹Own the application security tooling stack (SAST, DAST, SCA), integrating it into CI/CD with high-signal, low-noise outputs
• ▹Partner with engineers to triage and remediate vulnerabilities based on exploitability, impact, and regulatory risk
• ▹Work with Security Operations to improve application-level logging, telemetry, and incident response readiness
• ▹Act as a trusted advisor to engineering teams, raising the bar through practical guidance, documentation, and targeted training

Requirements

• ▹5+ years in security engineering, with a demonstrable track record of shipping platforms, not just performing reviews or writing policy
• ▹Production Go experience: comfortable designing, writing, testing, and shipping production Go services (applications without production Go will not progress)
• ▹Software engineering fundamentals: version control, code review, testing, CI/CD, observability, on-call for services you've built
• ▹Hands-on experience with payment cryptography operations on payment HSMs

About the company

Teya was founded on the belief that local businesses deserve better. It builds a financial platform for local businesses across Europe with simple tools, thoughtful design, and real human support, as a regulated payments fintech scaling into banking-licence territory.