Senior Software Developer

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

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 

• 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.

• 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 

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

• Working in internaitonal environment
• Flexible working hours
• Participation in greenfield projects
• Long-term cooperation 
• No dresscode
• Private healtcare package 
• Multisport card