PTBOX | Full Stack Developer at SD Solutions · Warsaw

On behalf of PTBOX, SD Solutions is looking for a talented Full Stack Developer

SD Solutions is a staffing company operating globally. Contact us to get more details about the benefits we offer.

Responsibilities:

• Develop robust backend services using Kotlin (Spring Boot / Ktor) and build modern frontends with React + TypeScript.
• Design and implement REST APIs and real-time communication layers (WebSocket / SSE).
• Containerize and orchestrate applications using Docker and docker-compose, including advanced patterns like Docker-in-Docker and sidecar containers.
• Design and optimize PostgreSQL databases with focus on performance and scalability.
• Ensure high security standards (input validation, rate limiting, secure resource management).
• Take full ownership of features — from requirements gathering to production deployment.
• Write clear technical documentation and justify architectural decisions.
• Work independently in a fast-paced environment while maintaining high code quality.

Requirements:

• 3–5+ years of professional experience
• Strong Kotlin/JVM backend skills; ability to architect services independently
• Solid React/TypeScript frontend skills
• Hands-on Docker experience in production (orchestration and programmatic management)
• Experience with REST API design and real-time communication (WebSocket/SSE)
• Database design and query optimization
• Security awareness (input validation, rate limiting, resource management)
• Ability to write technical documentation and explain architecture decisions
• Independent worker capable of taking tasks from requirement to production

About the company:

PTBOX offers security leaders a comprehensive platform to continuously assess, validate, and enhance their security defences. By simulating tailor-made attack scenarios based on real-world threats, PTBOX enables teams to evaluate their readiness and response capabilities. With automated features, PTBOX streamlines the testing process, allowing for repeated assessments until threats are addressed. By proactively testing under various conditions, businesses can identify and mitigate vulnerabilities, ensuring effective and swift responses to potential attacks.

By applying for this position, you agree to the terms outlined in our Privacy Policy. Please take a moment to review our Privacy Policy https://sd-solutions.breezy.hr/privacy-notice, and make sure you understand its contents. If you have any questions or concerns regarding our Privacy Policy, please feel free to contact us.