Lead / Senior Product & Platform Engineer

CSHARK is hiring a Senior / Lead Product & Platform Engineer to join their product development team working on a core platform focused on product enhancement, performance, reusable capabilities, and complex engineering. The role involves working closely with an international team and mentoring engineers.

• Minimum 5 years of commercial experience as a Java Developer.
• Strong commercial experience with Kotlin and Java.
• Strong experience with GCP, including Cloud Run, Compute Engine, Cloud Storage, IAM, and networking.
• Strong written and spoken English (C1), with experience working in an international environment.
• Experience with REST APIs, microservices, and distributed systems.
• Experience with PostgreSQL, Redis, and Firestore.
• Experience with CI/CD, Docker, and automated deployments.
• Practical experience delivering AI-agentic / LLM features.
• Understanding of retrieval grounding, moderation, and hallucination management.
• Ability to quickly work in an unfamiliar Kotlin/GCP codebase using AI coding tools.
• Strong engineering judgement and a reusability mindset.
• Ability to work independently and mentor other engineers.

Nice to have:

• Experience with Terraform, Pub/Sub, Vertex AI, or OpenAI APIs.
• Experience with high availability, fault tolerance, high-throughput / low-latency systems, concurrency or caching.
• Experience with OAuth / OIDC / JWT, secrets management or encryption.
• Experience with voice or conversational AI.
• Experience in collections, contact-centre or financial services.

• Developing and enhancing a core product platform.
• Working with Kotlin and Java on GCP.
• Building REST APIs, microservices, and asynchronous processing solutions.
• Working with PostgreSQL, Redis, and Firestore.
• Developing CI/CD and deployment automation using Docker.
• Ensuring proper testing, monitoring, logging, and performance.
• Troubleshooting production issues.
• Building reusable capabilities and solutions.
• Using AI coding tools to accelerate development while verifying generated code.
• Mentoring other engineers and communicating technical decisions clearly.

Zgoda na obecny proces rekrutacji i przetwarzanie danych osobowych przez CSHARK Sp. z o.o. zgodnie z RODO oraz innymi przepisami, z prawem cofnięcia zgody i prawami dotyczącymi ochrony danych osobowych.