Senior Software Engineer

Company: Collectly
Location: Serbia
Type: remote
Posted: Aug 18, 2026
Views: 3
flask postgresql python redis

✨ AI Summary

Collectly, a Y Combinator-backed healthcare patient billing platform, is hiring a Senior Software Engineer in Serbia. The role focuses on building core backend systems using a Python-first stack (Python, Flask, SQLAlchemy, PostgreSQL, Redis). Requires at least 5 years of experience building complex web apps, a passion for product quality, and the ability to thrive in a fast-paced startup environment.

About Collectly

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 patient 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.

Job description As a Senior Software Engineer, you will help build core parts of the Collectly platform. Our stack is Python-first, and we’re looking for engineers who are comfortable designing and evolving backend systems in Python. You'll collaborate closely with the founder, engineering leadership, product managers, designers, and fellow engineers to ship high-quality, impactful features for healthcare providers and patients alike. We are a hybrid company, partly based in Santa Monica, USA and partly remote, spread out around the United States & Europe.

As a member of the engineering team, you will: Collaborate with the founder, PMs, designers, and other engineers to navigate trade-offs and build a world-class product. Work with urgency to build critical features with a keen attention to detail and high-quality maintainable code. Completely own your features end-to-end, from product requirements, code, testing, observability, rollout and maintenance.

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 technology stack: Python Flask SQLAlchemy PostgreSQL Redis

Collectly is a tech-enabled patient billing platform that works as an add-on for your EHR/PM. Collectly accelerates and increases patient cash flow, streamlines post-service billing operations, and provides the best patient experience that works for all demographics.

Please, see a short video about us

About the Company

Name: Collectly

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