Senior Backend Engineer (Node.js)

About Bitmedia Labs
Bitmedia Labs - an international product IT company, has been in the industry since 2014, effectively functioning on a worldwide scale with a crew of 130+ ambitious and highly skilled professionals, creating successful projects in domains such as online advertising systems for the crypto space, blockchain games, and NFT products.

Responsibilities:

• Develop scalable marketplace platforms and backend systems from scratch with deep AI/LLM integration


• Lead backend development using Node.js and TypeScript, implementing RESTful APIs, microservices, and background workers


• Build and integrate RAG (Retrieval-Augmented Generation) solutions with vector databases for intelligent search and recommendations


• Create AI agents and autonomous systems using LangChain/LangGraph frameworks


• Write Python code when needed for AI/ML integrations, data processing pipelines, and LLM agent implementations


• Develop frontend solutions and MVPs when required, implementing UI components and user interfaces


• Integrate and manage databases (SQL and NoSQL), implement caching strategies, and optimize query performance


• Mentor and guide junior and mid-level developers through code reviews, pair programming, and technical discussions
  
  
  

Required Qualifications:

• 5+ years of professional Node.js development experience and 3+ years with TypeScript


• Expert-level knowledge of JavaScript fundamentals (event loops, closures, promises, async/await) and asynchronous programming patterns


• Deep understanding of Node.js frameworks (Express.js, NestJS, Fastify) and architectural patterns


• Strong experience with SQL (PostgreSQL, MySQL) or NoSQL databases (MongoDB, Redis)


• Strong understanding of system design principles, design patterns, and software architecture best practices


• Practical experience building AI agents beyond ChatGPT usage - demonstrated through pet projects or production work


• Willingness and ability to learn and write Python code when needed for AI/ML integration


• Working knowledge of front-end fundamentals (HTML5, CSS3, JavaScript) and ability to implement UI solutions when required


• Strong strategic thinking with ability to align technical solutions with business objectives


• Proven technical leadership and mentoring experience with ability to guide and develop team members


• Knowledge of Docker containerization, CI/CD pipelines (GitHub Actions, GitLab CI), and DevOps practices

Preferred Qualifications:

• Working knowledge of AI frameworks (LangChain, LangGraph) for building autonomous agents and RAG applications


• Experience with vector databases (Pinecone, Weaviate, Qdrant, ChromaDB) and embeddings implementation


• Familiarity with at least one modern front-end framework (React, Vue.js, Angular)


• Experience with cloud platforms (AWS, GCP, Azure) for application deployment and AI/ML services


• Familiarity with observability tools (DataDog, New Relic, ELK stack) and monitoring practices

Hiring process: 

• Intro call with a Recruiter - Technical Interview with the Hiring team - Final Interview with the CEO - Offer.
   

We offer:

• Flexible work environment - you can work remotely;


• The 8-hour working day with a flexible schedule;


• Competitive salary based on your experience;


• Regular performance review and annual salary review;


• Paid sick leaves, vacation, and holidays;


• Professional development tools (reimbursement of educational courses or workshops, conferences around the world);


• Ambitious team with transparent communication and a friendly atmosphere, no micromanagement;


• Apple equipment;


• Memorable gifts for holidays.