Node.js BackEnd Developer

JavaScript

czackiego, Warszawa

Optiveum

18 000 - 27 000PLN

Net per month - B2B

Full-time

B2B

Mid

Hybrid

Tech stack

TypeScript

advanced

Git

regular

Node.js

regular

JavaScript

regular

Docker

junior

MongoDB

junior

NoSQL

junior

Microservice Architecture

nice to have

RESTful API

nice to have

Job description

Our Client

Join one of Europe’s fastest-growing EdTech startups which provides a leading platform for math education in the K-12 space. By leveraging handwritten solutions in a digital format, our client allows teachers to place emphasis on creativity in math, while gaining key insights on student progression. This creates a more engaging, inclusive and pedagogical math class for all students.

Math remains the largest challenge for schools, where one in five students in year 8 are low performers. Math is one of the core pillars on which careers are built, and K-12 math represents one of the largest opportunities at improving educational outcomes and career prospects for children and young adults.

Originally founded in Stockholm, Sweden, our client is now growing rapidly in the US. They are an ambitious team on a meaningful mission of improving math education for millions of children.

The Role

We're seeking smart, driven software engineers to join our Client's growing, ambitious team. As a Backend Software Engineer, you'll play a crucial role in shaping the future of our platform.

Tech Stack: TypeScript, Node.js, NestJS, MongoDB, Redis, RabbitMQ, AWS

What You’ll Do

• Work on our microservices architecture, handling both legacy systems and greenfield projects
• Contribute to the design and implementation of scalable, high-performance backend services
• Optimize and maintain existing systems while building new features
• Take a high degree of ownership over the solutions you create, from conception to deployment and maintenance
• Stay up-to-date with emerging technologies and industry trends, applying new knowledge to improve our systems
• Collaborate closely with the whole product team, including Product Managers, QAs and other Software Engineers to create the best experience for our users

What We’re Looking For

• A proven track record in software engineering, demonstrating consistent high performance and impactful contributions
• Strong problem-solving skills and a passion for writing clean, efficient code
• Experience with microservices architecture and distributed systems
• Proficiency in system design and the ability to make architectural decisions
• Adaptability to work with both legacy codebases and greenfield projects
• A proactive attitude and the ability to thrive in a fast-paced, growing startup environment
• Excellent communication skills, both written and verbal, with the ability to articulate complex technical concepts

We Offer

• Salary of 18 000 - 27 000 PLN net
• B2B contract
• Hybrid setup with at least 3 days in office, located in the city center (Warsaw)
• Equipment and all the necessary tools
• Trips to our HQ in Stockholm, Sweden
• Paid vacation time
• Paid sick leave

Our Interview Process

• Short, take-home technical task
• Technical interview with an engineer from our team
• Non-technical interview with the Product team

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

Office location