Hybrid Internal Tools Engineer - AI-Driven Platform

Infolet; Kraków; Hybrid; PLN 120,000 - 200,000; Full time

Benefits offered by this job

Relocation package

Extended medical care

Multisport card

Life insurance

Job summary

Infolet Kraków is seeking a skilled backend engineer to help build internal tools supporting Future State Architecture across CTO Platforms. You will work with backend services, web UI, databases, and AI agents to automate software development workflows.

The position requires Node.js/Java, PostgreSQL expertise, and strong collaboration with architects and platform engineers in a hybrid environment (2 days in the office, 3 days remote).

Qualifications

• Proficient in backend development with Node.js and/or Java.
• Strong PostgreSQL data modelling and query optimisation knowledge.
• Understanding of AI agents and agentic engineering practices.
• Experience with integration patterns including APIs, MCP, and tool/function calling.
• Solid production engineering principles: security, resilience, observability, testing.
• Experience designing internal platforms or developer tooling.

Responsibilities

• Design, build, and maintain internal tools supporting Future State Architecture across CTO Platforms.
• Develop backend services and APIs using Node.js and/or Java.
• Integrate applications with PostgreSQL and enterprise data sources.
• Build and enhance web UI components for architects and engineering teams.
• Develop and orchestrate autonomous AI agents for build, test, and deployment processes.
• Implement integration patterns using MCP, tool/function calling, and APIs.
• Collaborate with architects, platform engineers, and stakeholders to translate requirements into solutions.
• Ensure solutions meet security, performance, resilience, observability, testing, and documentation standards.
• Contribute to code reviews, automation, and operational support.

Skills

Node.js

Java

PostgreSQL

AI agents / agentic engineering

APIs

Security / resilience / observability

English communication

Tools

MCP

Tool/function calling

APIs tooling

Job description

Infolet Kraków is seeking a skilled backend engineer to help build internal tools supporting Future State Architecture across CTO Platforms. You will work with backend services, web UI, databases, and AI agents to automate software development workflows.

The position requires Node.js/Java, PostgreSQL expertise, and strong collaboration with architects and platform engineers in a hybrid environment (2 days in the office, 3 days remote).