Senior Backend Engineer, NodeJS

This is a fully remote position, open to applicants in Poland.

📋 Description

• Design and develop backend architecture for AI-driven automation solutions.

• Collaborate with AI engineers and product teams to integrate and scale LLM-based product functionalities.

• Implement and enhance agent-based systems, including ReAct and supervisor-agent models.

• Optimize RAG pipelines and enrich context using both structured and unstructured data.

• Create robust APIs for internal services and external integrations.

• Ensure effective observability, monitoring, and alerting through tools like Grafana and OpenSearch.

• Engage in code reviews and architecture discussions.

• Maintain comprehensive technical documentation for newly developed systems and APIs.

• Collaborate with AI engineers, product teams, and cross-functional stakeholders.

• Construct production-ready systems that automate clinical and operational workflows for MEDvidi's telemedicine platform.

⛳️ Requirements

• Over 8 years of commercial backend development experience with Node.js in product companies, ideally in SaaS.

• Significant experience in designing backend architectures and technical solutions.

• Proven track record in building scalable, high-performance backend systems and robust APIs.

• Practical experience in integrating LLMs into production environments.

• Experience in designing and implementing multi-agent AI workflows in real-world applications.

• Familiarity with modern AI frameworks.

• Experience in designing and optimizing RAG pipelines, including embeddings, vector databases, retrieval strategies, ranking, and chunking.

• Strong skills in prompt engineering, including structured outputs, schema validation, and evaluation-based iteration.

• Knowledge of LLM infrastructure, tracing, observability, evaluation frameworks, safety mechanisms, guardrails, and performance/cost optimization.

• Hands-on experience with PostgreSQL and AWS services, including CDK, Lambda, API Gateway, and ElastiCache.

• Good understanding of observability and debugging practices, including tools like Grafana and OpenSearch or similar.

• Strong engineering culture focused on testing, CI/CD, reliability, and technical ownership.

• Product-oriented mindset.

• Proactive enthusiasm for AI.

• Fluent in Russian; English proficiency at B2 level or higher.

• Experience in medical/healthcare AI or regulated environments is a plus.

• Familiarity with MCP (Model Context Protocol) in Node.js is an additional asset.

🏝️ Benefits

• Competitive compensation package.

• Health insurance following the probation period.

• Compensation for sports and wellness activities.

• Personalized English lessons via Preply.

• 19 paid vacation days each year.

• 4 additional wellness days annually.

• Paid sick leave for the first 5 working days.

• Thoughtful gifts for significant life events.

• Offline corporate events.

• Fully remote long-term collaboration under a B2B model.