Node.Js Developer

JavaScript

Krucza 16/22, Warszawa

Optiveum

4 000 - 6 000USD

Net per month - B2B

Full-time

B2B

Mid

Hybrid

Tech stack

English

B2

Node.js

regular

JavaScript

regular

REST API

regular

MongoDB

regular

PostgreSQL

regular

Job description

🚀 We're Hiring:

Node.js Developer – Hybrid/Warsaw

🧩 About the Company

Our client is a US-headquartered technology company at the forefront of digital transformation in private capital markets. With a growing global presence, they are expanding their engineering hub in Warsaw and looking for top-tier talent to join their mission.

📍 Location & Setup

Begin remotely and transition to a hybrid work model in Warsaw (3 days/week on-site in the near future).

🧠 The Role: Node.js Developer

We’re seeking a talented Node.js Developer to join our web development team. You’ll be responsible for building and maintaining scalable backend applications and APIs, ensuring performance, security, and maintainability across our platforms.

🔧 Key Responsibilities

• Build and maintain server-side applications using Node.js
• Design and implement RESTful and GraphQL APIs
• Optimize backend services for performance, scalability, and security
• Integrate with front-end components and third-party APIs
• Collaborate with designers, developers, and product managers
• Write clean, maintainable, and well-documented code
• Participate in code reviews and team discussions
• Debug and resolve production issues
• Stay up to date with industry trends and emerging technologies

What We’re Looking For

• Proficiency in JavaScript (ES6+) and Node.js
• Experience with Express.js or similar frameworks
• Understanding of async programming and event-driven design
• Experience with REST APIs, GraphQL, and WebSockets
• Solid experience with MongoDB, PostgreSQL, or MySQL
• Familiarity with Git and version control workflows
• Experience writing unit tests with Mocha, Chai, or similar
• Familiarity with OAuth, OpenID, and authentication middleware
• Strong understanding of data structures, algorithms, and debugging

Nice to Have

• Experience with cloud platforms (AWS, GCP, or Azure)
• Knowledge of microservices architecture
• Familiarity with CI pipelines, static analysis, and automated testing
• Exposure to RAG (Retrieval-Augmented Generation) applications
• Agile/Scrum development experience

🎓 Qualifications

• Bachelor’s or Master’s degree in Computer Science or related field
• 4+ years of backend development experience using Node.js

🎁 What’s Offered

• Competitive salary up to $6,000 USD/month
• Start remotely, then transition to a hybrid setup in Warsaw
• Generous Paid Time Off (PTO)
• Full benefits package
• Opportunity to work on impactful projects and innovative platforms
• Supportive, collaborative, and tech-driven work culture

Published: 13.08.2025

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

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