Node.js BackEnd Developer

JavaScript

centrum, Warszawa+4 Locations

Optiveum

22 000 - 24 000PLN

Net per month - B2B

Full-time

B2B

Mid

Remote

Tech stack

English

C1

Node.js

advanced

JavaScript

regular

TypeScript

regular

RESTful API

regular

Azure

junior

CI/CD

nice to have

Docker

nice to have

Kubernetes

nice to have

Job description

Our Client

They are a creative, UK based, engineering studio that builds top-tier cross-platform digital products. Their strengths lie in combining research-informed product strategy, user-centric UX design, full-stack development across all major platforms, and client-focused product delivery. This holistic approach enables them to deliver tangible business outcomes—such as expanding reach with multi-platform solutions, reducing technical debt through modern technologies, gaining deeper customer insights via research, boosting engagement metrics, and providing scalable team augmentation—while fostering long-term, high-quality partnerships with globally recognized organizations.

The company has offices in London, New York, and Budapest, with around 70 team members (both contractors and full-time employees). Software development is carried out by the London and Budapest teams (the New York office focuses solely on business development), and working hours follow UK time.

Responsibilities

• Design, develop, and maintain backend services and APIs using Node.js

• Collaborate with frontend developers, designers, and product teams to deliver seamless digital products.

• Ensure scalability, security, and performance of backend systems.

• Write clean, maintainable, and well-documented code following best practices.

• Integrate third-party services and APIs where necessary.

• Participate in code reviews, testing, and continuous improvement initiatives.

• Contribute to architectural decisions and propose innovative solutions.

Requirements

• Strong proficiency in Node.js and JavaScript/TypeScript.

• 4+ years of experience as a backend developer

• Experience with backend frameworks (e.g., Express.js, NestJS).

• Solid understanding of RESTful APIs, authentication, and authorization.

• Hands-on experience with databases (SQL and NoSQL).

• Familiarity with cloud platforms (AWS, Azure, or GCP) and containerization (Docker, Kubernetes) is a plus.

• Knowledge of testing frameworks and CI/CD pipelines.

• Strong problem-solving skills, attention to detail, and a collaborative mindset.

• Good command of English (both written and spoken).

Nice to Have

• Experience with GraphQL or microservices architecture.

• Knowledge of event-driven systems and message queues.

• Understanding of DevOps practices and infrastructure as code.

What We Offer

• fully remote role

• Salary up to 24k PLN on B2B Contract

• B2B contract signed with Optiveum

• Opportunity to work on high-impact international projects across multiple platforms.

• A collaborative, cross-disciplinary team environment

Published: 24.08.2025

Meet the company

Optiveum

Optiveum is a boutique consultancy founded in 2020 with over 20 years of experience by its founders. The company specializes in supporting businesses, particularly from IT and tech industries, in Poland and Central Europe. They offer services such as building teams (mainly IT and sales), go-to-market strategies including digital marketing, sales outsourcing, and legal and tax advisory. Their recruitment services focus on experts and managers, primarily IT and engineers, with a large candidate database. They also provide strategic consulting for market entry and outsourcing services for IT teams, sales, and recruitment process outsourcing.

Company profile

Office location