Senior Software Engineer (Full Stack, front-end heavy)
Collectly
Software Engineering
Belgrade, Serbia
USD 85k-108k / year
Posted on Jan 7, 2026
Our mission is to enable healthcare organizations to focus on providing care, rather than spending time on collections and tedious administrative tasks. At the same time we see this being possible only by providing financial transparency for patients and a modern patient experience from check-in to getting a bill.
We’re Y Combinator alumni and have raised last year $29M from Sapphire Ventures to expand the product and accelerate growth from a healthy bottom line with hundreds of clients.
Must-haves
- At least 5 years experience building complex web apps.
- A passion for building and delivering exceptional products.
- The ability to navigate a fast-paced work environment.
- A hard-working ethic to help build and grow a new startup.
- Exceptional written and oral communication skills.
Nice-to-haves
- Experience with our backend technology stack: Python, SQLAlchemy, PostgreSQL.
- Experience working with custom design systems.
- Knowledge of performance optimization and accessibility best practices.
85000 - 108000 USD a year
Job description
As a Senior Full-Stack Engineer (Front-End Heavy), you will help build core parts of the Collectly platform. You will work on building front-end heavy features using React, TypeScript, Redux Toolkit, and our internal UI Kit. Accuracy, performance, and near pixel-perfect implementation are important in this role. Although the focus is on front-end work, we value engineers who can own a feature across the stack from start to finish.
We are a hybrid company, partly based in Santa Monica, USA and partly remote spread out around the United States & Europe.