Zync: Leading an AI/video SaaS from interface to infrastructure
I joined Zync as a frontend developer and gradually took ownership across backend systems and cloud infrastructure, helping shape five products across the stack.
Rafał Bagrowski · Lead Full-Stack Engineer for SaaS Products
I turn complex SaaS workflows into reliable products.
I help founders and product teams ship critical features and stabilize React and Node.js products that have become slow, fragile, or expensive to run. My work spans product, backend, and cloud, with particular depth in AI and video systems.
Professional profile at a glance
- Role
- Lead Full-Stack Engineer
- Experience
- 9+ years
- Focus
- React · Next.js · Node.js · Cloud
- Location
- Global · Flexible
- Open to
- Projects · B2B · permanent roles
Where I usually help
I’m usually brought in when a team needs an important workflow shipped, a production problem fixed, or a senior engineer to lead a focused effort.
- Ship an MVP or critical feature. Take one important workflow from scope to production without overbuilding the rest.
- Improve a React or Next.js product. Remove friction from the interfaces and customer workflows that matter most.
- Fix APIs and background jobs. Make queues, integrations, retries, and failure recovery dependable.
- Stabilize performance and reliability. Find the real bottleneck, fix it, and add the monitoring needed to keep it fixed.
- Reduce AI and video infrastructure costs. Improve rendering and processing workflows without sacrificing reliability.
- Add senior technical ownership. Lead a focused workstream, unblock the team, and leave the system easier to operate.
Selected product outcomes I helped deliver
Selected work across product layers.
Each case study explains my contribution and gives the product results in context.
Commerce at scale: Frontend delivery for 4F and EZ Living Furniture
As part of the Fast White Cat team, I contributed to checkout, catalog, and reusable React/TypeScript components for 4F and EZ Living Furniture. I also supported homepage performance work that reached a 90+ Lighthouse score at the time recorded.
Collab Video: Removing friction from asynchronous video collaboration
I turned a niche we uncovered at Zync into an independent product: hosts record questions, speakers answer when they have time, and the conversation becomes an asynchronous podcast without the calendar chase.
Pixsprint: Building living media kits for creators
I built Pixsprint to replace the stale PDF-and-spreadsheet routine of sending tailored media kits with a living workspace that keeps creator proof current and shows what happens after a brand opens the link.
Tell me about your project
Location and availability
- Global · Flexible
Remote · global teamsOpen to conversations nowUp to 30–40 hours/week
Want to talk?
Let’s schedule a 30-minute call.