Senior Software Developer room

Integral Solutions - Informatica Distributor; Warszawa; Hybrid; PLN 218,000 - 290,000; Full time

Job summary

Integral Solutions - Informatica Distributor in Poland is seeking a Senior Backend Developer with strong Node.js and TypeScript skills to join a remote-first team building an AI-powered fitness device. This is a 100% remote B2B role with a monthly net salary of 4500–6000 EUR.

You will design scalable backend systems, leverage serverless architectures on AWS, and work with NoSQL data stores (DynamoDB, Elasticsearch) while aiming for low latency and high throughput.

Qualifications

• 5+ years of hands-on backend development in high-performance environments.
• Strong experience with Node.js, TypeScript, and React.
• Proficient in AWS, serverless architecture, and microservices.
• Experience with NoSQL data stores (DynamoDB, Elasticsearch).
• Startup experience is a plus.

Responsibilities

• Design and implement scalable backend systems with low latency.
• Build backend services using serverless architecture, AWS, and big data.
• Deliver high-quality software on time through collaboration and optimization.
• Apply CI/CD and/or TDD to ensure quality, performance, reliability.
• Profile and tune backend performance for efficiency.

Skills

Node.js

TypeScript

React

AWS

Serverless

Microservices

DynamoDB

Elasticsearch

Startup experience

Job description

Job title: Senior Backend Developer
Location: Poland
Work mode: 100% remote
Type of cooperation: B2B contract
Salary range: B2B: 4500 - 6000 EUR net /month

About the company/project:

Let’s get straight to the point - we’re building the next chapter in interactive fitness.

We’re a team of tech-driven fitness enthusiasts who believe that working out should be something people actually enjoy.

So we started designing. From the ground up.

The result? A one-of-a-kind device — a smart IoT-powered strength training machine that combines advanced hardware with an AI-powered personal coach.

It’s built for effective, personalized strength workouts at home, with real-time feedback, tracking, and progress you can feel.

This project is being developed for an Israeli startup in the fitness space, aiming to redefine how people train at home through a truly innovative product.

Our team brings together experienced designers, product managers, and top-tier software and hardware engineers - many of whom have worked on some of the most recognized consumer tech products out there.

Now, we’re combining our skills to build something that will reshape home fitness — engaging, effective, and genuinely rewarding.

Backend Developer with Frontend skills as a plus

Workplace: An office in Warsaw, possibility to work 100% remotely

Responsibilities:

• Design and implementhighly scalable and performant backend systems, focusing on low latency and high throughput.
• Develop complex, scalable backend services from the ground up using cutting-edge technologies such as serverless architecture, AWS, and big data.
• Deliver high-quality software on time by collaborating with the team on backend optimizations, and taking ownership of the process
• Utilize Continuous Integration & Delivery and/or Test-Driven Development to ensure code quality, performance, and reliability.
• Conduct performance profiling and tuning on backend systems to achieve optimal efficiency.

You are an ideal candidate if you have:

• Experience as Software Engineer with 5+ years of hands-on experience in backend development, preferably in high-performance, low-latency environments
• Experience with Node.js, Typescript and some react
• Experience in cloud platforms, particularly AWS, and familiar with serverless architecture and microservices
• Hands-on experience with NoSQL data stores like DynamoDB, Elasticsearch, etc.
• A problem-solving attitude, eager to tackle performance and efficiency challenges in backend systems
• Experience in startup environment

Nice to have:

• Experience in multiple front-end platforms e.g. iOS, React, Android, and API services
• Experience with Swift/SwiftUI
• Experience integrating GenAI technologies