Node.js BackEnd Developer

JavaScript

Node.js BackEnd Developer

JavaScript
czackiego, Warszawa

Optiveum

Full-time
B2B
Mid
Hybrid
4 958 - 7 437 USD
Net per month - B2B

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

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

Office location

Published: 29.07.2025

About 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 Europ...

Company profile