Description

I help SaaS and AI teams build, scale, and stabilize production-ready products - from React interfaces and Node.js APIs to AI workflows, integrations, and cloud infrastructure.

I’m a Full-Stack Engineer with 9+ years of experience across SaaS, AI, video automation, e-commerce, financial services, and data products. My core stack includes React, Next.js, Node.js, GraphQL, GCP, Azure, Docker, and Kubernetes.

At Zync, I lead engineering across five product areas serving 1,000+ active users and supporting monetization workflows tied to $20k MRR. Recent results include:

• Reduced manual post-production by 2–3 hours per video

• Cut queue-based rendering costs by 90%

• Scaled video rendering to 200 jobs/day, with peaks around 500

• Improved P0 incident recovery time to approximately 30 minutes

• Mentored five engineers and established architecture and code-review standards

I can help you with:

• Full-stack SaaS and MVP development

• System design and architecture

• React/Next.js frontends and Node.js/GraphQL backends

• AI/LLM integrations and video automation

• Real-time collaboration with WebSockets and WebRTC

• Stripe billing, third-party APIs, worker queues, cloud deployment, and production reliability

Previously, I built React commerce products serving 5M+ monthly users and supporting $400M+ in combined annual revenue, as well as software for financial-services and BI teams.

If you need a senior engineer who can own delivery from discovery and architecture through deployment and production support, let’s talk.

Industry field of expertise

Languages

Polish
Native or bilingual
Spanish
Basic
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Zync AI
Lead Full Stack Engineer
TECH
April 2022 - Today (4 years and 3 months)
California City, United States
Lead full-stack engineering for Zync's cloud-native AI/video SaaS across meetings, collaboration, automated content production, and AI workflows.
- Led engineering across 5 product areas for a platform serving 1,000+ active users; owned architecture, code review standards, release planning, and mentoring for 5 engineers.
- Built React/Next.js/Redux, Node.js/GraphQL, TypeScript, and Python systems for collaboration, ContentKit automation, rendering, monetization, publishing, and admin workflows.
- Shipped ContentKit workflows for transcripts, AI thumbnails, screenplay driven videos, captions, b-roll, audio, webhooks, retries, and render callbacks, reducing manual post-production by 2-3 hours per video.
- Built cloud GPU/video workflows for avatars, voice/video generation, background removal, alpha matting, batch APIs, and worker queues; queue based rendering cut rendering costs by 90%.
- Scaled Remotion/FFmpeg rendering across GKE/AKS with Azure Service Bus workers, autoscaling, monitoring, and resource optimization, supporting 200 renders/day and peaks around 500.
- Shipped Stripe billing, workspace plans, publishing integrations, scheduling workflows, and admin tools supporting 5 products with USD 20k MRR.
- Improved reliability with logging, analytics, health probes, retries, duplicate render handling, cache invalidation, and deployment automation, improving P0 MTTR to about 30 minutes. Technologies: React, Next.js, Redux, TypeScript, Node.js, GraphQL, Python, Remotion, FFmpeg, OpenCV, GCP, Azure, Docker, Kubernetes, AKS, GKE, ACR, Azure Service Bus, CI/CD, WebSockets, Daily.js, Stripe.
React.js Node.js Next.js Google cloud LLM
Fast White Cat S.A.
Senior Frontend Engineer
E-COMMERCE
June 2021 - May 2022 (11 months)
Warsaw, Poland
Built high-performance React storefronts for Magento 2 and PWA Studio e commerce projects serving 5M+ monthly users and supporting USD 400M + in annual combined revenue, with focus on checkout reliability, frontend architecture, reusable components, and performance.
- Developed storefront features across checkout, shipping, guest forms, payment methods, cart/minicart, homepages, product listings, category pages, and user account pages.
- Delivered React, TypeScript, GraphQL/Apollo, Node.js, JavaScript, and CSS functionality across Magento 2/PWA Studio storefronts.
- Contributed reusable components to private libraries used across company projects.
- Supported frontend performance goals, including homepage Lighthouse scores above 90.
- Validated Magento 2 Admin Panel behavior against frontend requirements.
- Participated in application and functionality design based on business and functional requirements.
- Used Cypress and Jest to support test coverage and delivery confidence. Technologies: React hooks, Node.js, TypeScript, JavaScript ES6+, CSS, GraphQL Apollo, PWA Studio, Magento 2, Cypress, Jest, Jira, Bitbucket.
PWA React.js Magento Typescript Node.js
GFT Group
Senior Software Engineer
BANKING AND INSURANCE
October 2019 - May 2021 (1 year and 7 months)
Warsaw, Poland
Delivered full-stack and mobile software for financial-services clients, combining React, React Native, Node.js, TypeScript, GraphQL, testing, and cloud-native delivery practices.
- Built client-facing web and mobile features using React, React Native, Node.js, TypeScript, GraphQL/Apollo, Prisma, and JavaScript ES6+.
- Created reusable UI and API patterns to standardize implementation across applications.
- Improved release confidence by adding Cypress end-to-end tests and Jest/ React Testing Library coverage around critical flows.
- Supported cloud-native delivery on GCP with Docker and Kubernetes.
- Partnered with product, QA, and distributed engineering teams to translate banking requirements into maintainable, production-ready software. Technologies: React, React Native, Node.js, TypeScript, GraphQL, Apollo, Prisma, JavaScript ES6+, Cypress, Jest, React Testing Library, GCP, Docker, Kubernetes.
React.js React Native GraphQL Node.js Java