Senior Backend Engineer (Node.js) - Hybrid Kraków

OneRail; Kraków; Hybrid; PLN 200,880 - 312,480; Full time

Job summary

OneRail is a technology company in Kraków, Poland, delivering a delivery orchestration platform that connects shippers with a broad courier ecosystem. We seek a Senior Backend Developer (Node.js) to design, optimize, and scale backend services powering our logistics platform.

You will work in a hybrid setup, collaborating with cross-functional teams, implementing secure, scalable solutions, and contributing to CI/CD improvements while staying current with new technologies.

Qualifications

• 3+ years of backend development experience, 6+ years for senior.
• Experience building RESTful APIs and microservices.
• Experience with databases such as MySQL, MongoDB, CosmosDB or similar.
• Understanding of cloud services (Azure and GCP) and containerization (Docker, Kubernetes).
• Experience with Agile methodologies and CI/CD practices.
• Familiarity with message queues (RabbitMQ, Kafka) is a plus.
• Strong problem-solving skills and ability to work in a fast-paced environment.
• Excellent communication and collaboration skills.
• Advanced proficiency in English, both written and spoken (B2+).

Responsibilities

• Develop, optimize, and maintain backend services and APIs powering our logistics platform.
• Design and implement scalable, high-performance solutions using Node.js and other modern backend technologies.
• Implement best practices for security, scalability, and performance optimization.
• Participate in code reviews, testing, and debugging to ensure high code quality and reliability.
• Monitor system performance, troubleshoot issues, and proactively optimize processes.
• Collaborate with frontend developers, product managers, and other stakeholders.
• Document technical specifications and architectural decisions for future reference.
• Assist in automating deployment processes and improving CI/CD pipelines.
• Stay updated with industry trends and emerging technologies to continuously improve our platform.

Skills

English (B2+)

Problem solving

Communication

Team collaboration

Tools

Node.js

TypeScript

RESTful APIs

Microservices

MySQL

MongoDB

CosmosDB

Azure

GCP

Docker

Kubernetes

CI/CD

RabbitMQ

Kafka

Job description

OneRail is a technology company in Kraków, Poland, delivering a delivery orchestration platform that connects shippers with a broad courier ecosystem. We seek a Senior Backend Developer (Node.js) to design, optimize, and scale backend services powering our logistics platform.

You will work in a hybrid setup, collaborating with cross-functional teams, implementing secure, scalable solutions, and contributing to CI/CD improvements while staying current with new technologies.