TR Labs

About the Role 
We're looking for a  Backend Developer to design and build the backend of our products — REST APIs, services, and AI integrations from data model to production. You'll own features end-to-end, contribute to architectural decisions, and occasionally jump into the React frontend when it makes sense.

What You'll Do

• Design, build, and maintain backend services and REST APIs for our products – from data model through to production.
• Integrate AI / LLMs into product features.
• Design and implement clean, well-documented REST APIs (contract-first where it fits).
• Write maintainable, testable code with strong unit and integration test coverage.
• Take part in code reviews, both giving and receiving constructive feedback.
• Collaborate closely with product managers, designers, frontend engineers, and QA in an Agile team.
• Investigate and resolve bugs, and help improve performance and reliability.
• Contribute to technical and architectural decisions.
• (A plus) Occasionally contribute to the React frontend when a feature spans the stack.
   

What We're Looking For

Must-have (backend):

• 3+ years of commercial backend development experience in Java.
• Strong Java Core; hands-on experience with Spring Boot (Spring MVC, Spring Data JPA, Hibernate), Spring Security, and Spring AOP.
• Familiarity with MapStruct for entity-to-DTO mapping and Lombok.
• Practical experience designing and consuming RESTful services.
• Good SQL skills with a relational database (PostgreSQL); schema migrations with Flyway.
• Understanding of OAuth2 / JWT-based authentication and role-based access control.
• Comfortable with Docker and Docker Compose.
• Confident with Git and a standard branching workflow; familiarity with Gradle.
• Experience writing unit and integration tests (JUnit, Testcontainers).
• Genuine interest in integrating AI / LLMs into product features.
• Solid understanding of OOP, web fundamentals, and clean-code principles.
• English at Upper-Intermediate (B2) level — able to communicate in writing and on calls.
   

A big advantage:

• Frontend experience with React — JavaScript/TypeScript, HTML, CSS/SCSS, and the modern React ecosystem: client state (Zustand), server state / data fetching (TanStack Query), routing (React Router), and a modern build tool (Vite).
• Hands-on experience integrating AI / LLMs into real product features.
• Contract-first / OpenAPI workflow — OpenAPI 3 with code generation (openapi-generator).
• Experience integrating an identity provider such as Keycloak.
• AWS exposure (EC2, RDS, CloudWatch) and structured (JSON) logging.
• End-to-end testing with Playwright.

We are looking for an Applied AI Engineer to help our team design, develop, and improve production AI systems powered by LLMs.

Responsibilities

• Develop and improve LLM and RAG pipelines.
• Work with structured outputs, tool calling, and agentic workflows.
• Integrate AI components with backend systems and external services.
• Evaluate model performance and reduce errors.
• Research and apply new AI approaches.
• Use Claude Code, Codex, and other AI development tools.

Requirements

• 1+ year of commercial software development experience.
• Strong knowledge of at least one programming language: Python, JavaScript/TypeScript, Java/Kotlin, C#, or another backend language.
• Practical experience with LLM APIs or AI-powered features.
• Understanding of RAG, embeddings, vector search, and prompt engineering.
• Experience with APIs, databases, and Git.
• Strong technical thinking, independence, and a desire to grow in Applied AI.

Python experience is a plus, but we are open to candidates with other strong technical backgrounds.

Nice to Have

• Experience building LLM or RAG solutions.
• Understanding of ML fundamentals, datasets, and AI system evaluation.
• Experience with vector databases, FastAPI, Langfuse, LangChain, or LlamaIndex.
• Experience with Docker, queues/workers, or event-driven systems.
• Personal AI projects or open-source contributions.

We do not expect candidates to know everything listed above. Practical thinking, a strong technical foundation, and the ability to learn quickly are more important to us.

What We Offer

• Fully remote work.
• Work on real production AI systems.
• The opportunity to influence architecture and technical decisions.
• Practical experience with LLMs, RAG, AI evaluation, and agentic systems.
• Minimal bureaucracy and direct communication with the team.
• Opportunities to grow professionally together with the product.

We're looking for an HR Manager to join our team and take care of HR operations and recruitment support. You'll handle employee documentation, post job vacancies, and help with the early stages of the hiring process.

We're looking for someone who is motivated to grow in IT HR, comfortable taking on a variety of tasks, and open to expanding their skills across different areas.

What You'll Do

• Manage employee documentation and HR records
• Coordinate onboarding and offboarding processes
• Support the team with HR-related questions
• Help build and maintain company culture and internal communication
• Track vacations, sick leaves, and other team-related information
• Post job vacancies and support the recruitment process 
• Review CVs and communicate with candidates at early stages
• Contribute to improving and structuring HR processes

What We're Looking For

• Up to 1 year of experience in HR (IT industry is a plus)
• Basic understanding of HR processes and employee lifecycle
• Basic understanding of recruitment - sourcing, pre-screening, candidate communication
• Strong communication skills - both written and spoken
• Attention to detail and ability to keep things organised
• English B1 - both writing and speaking
• Experience working with AI tools and understanding of how they work
• Proactive approach and ability to handle multiple tasks at the same time
• Comfortable taking on tasks outside your direct role and exploring new areas
• Ready to learn and grow

We Offer

• Remote work
• Flexible working schedule
• Friendly team and great atmosphere
• Interesting and varied projects
• Room to grow in HR and broader people-related functions