Senior Backend Developer (Node.js/TypeScript)

Location: 100% remote or hybrid from Warsaw/Gdańsk, Poland

Salary: 1,150–1,280 PLN/day on a B2B contract

Company

hirify.global is a Polish IT services company providing specialized software development teams and technology projects for international clients.

What you will do

• Build a backend integration that imports meter data from external systems into Leanheat Monitor.
• Work on time-series database migration if integration work is blocked.
• Develop data validation architecture.
• Work independently within a large existing codebase.
• Collaborate with the team and use available support when needed.

Requirements

• Senior-level backend development experience.
• Ability to work independently in a large existing codebase.
• Strong knowledge of Node.js and TypeScript, or willingness to work with this stack.
• Experience with time-series databases such as InfluxDB, TimescaleDB, or ClickHouse.
• Good working knowledge of English at minimum B2 level.

Nice to have

• Experience with data integration through third-party APIs or file-based imports.
• Experience in IoT or the energy sector.

Culture & Benefits

• Opportunity to develop and improve a software tool supporting heating and cooling solutions for customers worldwide.
• Work on sustainable, cost-efficient, and environmentally friendly heating and cooling solutions.
• Regular integration meetings within the Jit community.
• B2B contract with a remote or hybrid working model.