Summary
✨ AI‑Generated
A Senior Full-Stack Engineer with a strong backend focus is needed to build and modernize a scalable communication platform. You will develop Node.js and TypeScript services, messaging APIs, agent-ready interfaces, MCP solutions, and tool-calling workflows; integrate LLM capabilities into production; build external connectors; and design asynchronous, event-driven systems on AWS. The role is fully remote within Poland and includes opportunities to work with modern AI and cloud-native technologies.
Highlights
Fully remote senior engineering role with strong backend ownership and competitive Polish-market compensation. The position combines modern Node.js and TypeScript development with agentic AI, cloud-native architecture, messaging systems, APIs, and gradual modernization of legacy services.
Description
Location: Poland (Only)
Work model: Remote
Employment: Full-time, UoP
Compensation: PLN 25,000–31,000 gross/month
We are looking for a Senior Full Stack Engineer with a strong backend focus to join an international SaaS product company.
You will help build and modernize a communication platform, developing scalable messaging capabilities and APIs used by web applications, AI agents and external integrations.
The role combines modern Node.js development, agentic AI, cloud-native architecture and gradual modernization of existing PHP services.
Responsibilities
Design and build backend services using Node.js and TypeScriptDevelop messaging APIs for web applications, AI agents and third-party integrationsBuild agent-ready APIs, MCP solutions and tool-calling workflowsIntegrate LLM-powered functionality into production systemsDevelop connectors for external communication platforms and APIsDesign asynchronous and event-driven systems on AWSWork with queues, background jobs, retries, idempotency and failure handlingGradually migrate functionality from legacy PHP services to Node.jsContribute to React-based frontend functionality when requiredImprove system reliability, observability, security and performanceCollaborate with product and engineering teams on architecture and deliveryRequirements
Strong commercial experience with Node.js and TypeScriptExperience designing REST APIs, integrations and backend servicesExperience with React and modern full-stack developmentPractical experience with AI agents, LLM integrations, tool calling or MCPExperience with AWS and event-driven architectureUnderstanding of microservices and distributed systemsExperience with asynchronous processing, message queues and background jobsGood knowledge of API security, testing and observabilityGood English communication skillsAbility to work independently in an international engineering teamNice to have
Commercial experience with PHP and legacy system modernizationExperience migrating PHP functionality to Node.js servicesExperience with AWS Lambda, SQS, SNS or EventBridgeExperience with Kafka or RabbitMQExperience with email or messaging integrationsFamiliarity with Gmail API, Microsoft Graph or Amazon SESExperience with webhooks, retries, deduplication and idempotencyExperience building production AI agents or MCP serversWhat we offer
Full-time UoP employmentPLN 25,000–31,000 gross per monthRemote work within PolandLong-term cooperation with an international SaaS product companySignificant technical ownershipWork on production AI, messaging and integration infrastructureOpportunity to influence architecture and platform modernization
