Senior Node.js & API Integration Engineer

Sii Poland; Białystok; On-site; PLN 180,000 - 260,000; Full time

Job summary

Sii Poland is seeking a Senior Node.js Developer to join an international team building and enhancing a strategic integration platform connecting business-critical systems and data platforms.

You will design, develop, and maintain integration services, REST APIs, and AWS-based infrastructure with Terraform, while improving reliability, scalability, and performance.

This role requires 5+ years in Node.js, strong data integration experience, and fluent English; residency in Poland is expected.

Qualifications

• 5+ years of Node.js development experience.
• 2+ years in system/data integration.
• Experience with distributed systems and scalability patterns.
• Experience designing REST APIs and integration solutions.
• AWS services (Lambda, SQS), Terraform, and IaC practices.
• GitHub workflows and CI/CD, Linux CLI and shell scripting.
• Fluent English; residency in Poland.

Responsibilities

• Develop and enhance integration services and APIs to support business-critical applications.
• Maintain production integrations ensuring platform stability.
• Investigate and resolve integration and data flow issues.
• Design and implement REST APIs across distributed systems.
• Build AWS-based infrastructure using Terraform and serverless services.
• Improve platform reliability, observability, scalability, and performance.
• Collaborate with global teams on technical solutions and platform evolution.

Skills

Node.js

REST APIs

CI/CD practices

Shell scripting

English language

Distributed systems design

Data integration concepts

Tools

AWS

Terraform

GitHub workflows

Job description

Sii Poland is seeking a Senior Node.js Developer to join an international team building and enhancing a strategic integration platform connecting business-critical systems and data platforms.

You will design, develop, and maintain integration services, REST APIs, and AWS-based infrastructure with Terraform, while improving reliability, scalability, and performance.

This role requires 5+ years in Node.js, strong data integration experience, and fluent English; residency in Poland is expected.