Senior Backend Developer (Node.js) @ Integral Solutions

Integral Solutions; Polska; Remote; PLN 211,000 - 296,000; Full time

Job summary

A tech-driven fitness company seeks a Senior Backend Developer to design scalable backend systems for a smart IoT-powered strength training machine. The ideal candidate has 5+ years of experience in backend development, particularly with Node.js, AWS, and NoSQL databases. This is a fully remote role in Poland, offering innovative projects and a supportive work environment.

Benefits

Private healthcare

Sport subscription

Small teams

International projects

Flat structure

Startup atmosphere

No dress code

Free parking

Qualifications

• 5+ years of hands-on experience in backend development, preferably in high-performance, low-latency environments.
• Experienced in cloud platforms, particularly AWS, and familiar with serverless architecture and microservices.
• Hands-on experience with NoSQL data stores like DynamoDB and Elasticsearch.

Responsibilities

• Design and implement highly scalable and performant backend systems.
• Develop complex, scalable backend services from the ground up.
• Utilize Continuous Integration & Delivery and/or Test-Driven Development.

Skills

Node.js

GraphQL

TypeScript

AWS

DynamoDB

Elasticsearch

Fluent English

Education

Degree in Computer Science or a similar field

Job description

Senior Backend Developer (Node.js) @ Integral Solutions

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.

Our product is a smart IoT‑powered strength training machine that combines advanced hardware with an AI‑powered personal coach, providing real‑time feedback, tracking, and progress. 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 from recognized consumer tech products, and we’re building something that will reshape home fitness — engaging, effective, and genuinely rewarding.

Workplace: 100% remote, Poland

Responsibilities

• Design and implement highly 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:

• A seasoned Software Engineer with 5+ years of hands‑on experience in backend development, preferably in high‑performance, low‑latency environments.
• Experienced with Node.js, GraphQL, and TypeScript.
• Experienced in cloud platforms, particularly AWS, and familiar with serverless architecture and microservices.
• Experienced with building microservices systems in a serverless environment.
• Hands‑on experience with NoSQL data stores like DynamoDB and Elasticsearch.
• Fluent in English.

It will be a strong plus:

• Experience in multiple front‑end platforms, including iOS, React, Android, and API services.
• Experience with Swift/SwiftUI.
• Experience integrating GenAI technologies.
• Degree in Computer Science or a similar field.

Benefits

• Private healthcare
• Sport subscription
• Small teams
• International projects
• Flat structure
• Startup atmosphere
• No dress code
• Free parking