B2B
fully remote, Poland
Senior Fullstack Developer (Node & React)
Who we are - and why you might want to join us?
We’re a software development company based in Kraków, working with international clients from industries like foodtech, construction, fintech, real estate, or healthcare. Over the last 15+ years, we’ve delivered 150+ digital products - from web and mobile apps to complex platforms and MVPs.
We work in small, cross-functional teams, combining business and tech expertise. Some of us have been here for 5, 8, even 13 years - and we’re still growing!
What connects us? A pragmatic approach to software development, a curiosity for new technologies, and a culture of collaboration. We value autonomy, clear communication, and doing things the right way.
👉 Looking for a place where you can grow, have a real impact, and enjoy what you do?
Join us and be the architect of our success stories! 👈
SENIOR FULLSTACK DEVELOPER (Node & React)
[ Fully Remote ]
About Role
70-80% backend (Node) + 20-30 % frontend (React)
Project
You will join a mission-critical project for one of our established US-based clients (with a minimum 8-month engagement).
The project involves the evolution of a high-precision spatial computing platform operating at the intersection of ConTech and FinTech. The system is responsible for precise spatial calculations and automated cost estimation for multi-million dollar construction investments.
This is not your typical greenfield project. Your main challenge will be the evolution of a powerful, mature ecosystem. This role requires a genuine passin for reverse engineering and the ability to navigate skillfully through complex legacy code.
The Core of the Role:
• Analysis-First Approach: Approximately 60–80% of your effort will involve deep-dive analysis – reading advanced code, mapping hidden business dependencies, and optimizing the computational algorithms that form the system's foundation.
• Logic over Frameworks: React and Node.js are merely tools here. The heart of the system lies in the powerful mathematical logic embedded within 2D/3D geometry.
• As a Senior Fullstack Engineer, you will join a dedicated team within the client's technical organization, collaborating daily with an experienced domain team to deliver high-impact solutions.
Key Responsibilities:
- Building and optimizing precision algorithms for spatial measurements (surfaces, dimensions) and automated cost estimation
- Developing and maintaining the UI using Canvas API (and elements of WebGL) for 2D/3D visualizations of construction models
- Delivering features across the entire stack, from Node.js microservices and database schemas to React on the frontend
- Optimizing rendering and data processing to ensure a smooth user experience when handling large-scale architectural datasets
- Evolving and improving a mature, production-proven codebase to enhance system maintainability and scalability
- Ensuring high calculation correctness through testing and participating in a thorough Code Review process
- Collaborating with long-tenured domain experts to navigate cross-team dependencies and align on technical decisions
Sound like something for you? Send us your CV-- we’re excited to meet you!
What’s next?
- Initial Call: If your profile aligns with our needs, we’ll invite you for an online call.
- Tech Check: We’ll invite selected candidates for a technical interview to assess specialist knowledge.
- Client Interview: You’ll meet the Client’s team for a deep-dive technical discussion.
- Offer: If everything clicks, we’ll send you a complete offer with all the details.
- Welcome aboard!
*Note: Depending on the specific case, an extra step might be added to the process.