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Miroslav Kafka

@miroslavkafka

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Senior fullstack engineer building real-time, end-to-end web platforms.

Czechia

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What I'm looking for

I’m looking to own end-to-end features, from data models to pixel-perfect UI, while building real-time systems and cloud-native platforms. I want a product-minded team where I can lead squads, improve performance, and ship safely with strong testing and observability.

I’m a Senior Full Stack Engineer with 9+ years of experience designing and delivering end-to-end web platforms across frontend, backend, and infrastructure layers. I specialize in React and Next.js, with Node.js and NestJS on the backend, and I focus on product-focused engineering at scale.

At The Weather, I owned complete feature delivery from database schema to pixel-perfect UI, leading cross-functional squads to compress delivery cycles from three weeks to five days. I built a full-stack real-time loan application tracking system with sub-200ms latency, eliminating 40,000 daily polling requests, and I pushed performance with streaming SSR and strong Web Vitals results.

I also drive reliability and efficiency through type-safe full-stack contracts (tRPC + shared validation), backend aggregation patterns, and infrastructure automation on AWS and Vercel. Earlier, at Fively, I built a SaaS platform for 700,000+ active users and mentored developers through migration and testing practices that reduced production incidents and strengthened engineering quality.

Experience

Work history, roles, and key accomplishments

Senior Fullstack Engineer

The Weather

Aug 2022 - Apr 2026 (3 years 8 months)

Owned end-to-end delivery of a Next.js and NestJS lending platform, leading an eight-person squad and compressing feature delivery cycles from three weeks to five days. Built real-time loan tracking with sub-200ms updates, cut 40,000 daily polling requests, and improved Lighthouse to 97 while reducing integration bugs by 65% and p99 latency on key endpoints to under 240ms.

Next.js React NestJS WebSockets BullMQ Terraform PostgreSQL Prisma OpenTelemetry

Full Stack Engineer

Fively

Apr 2020 - Jul 2022 (2 years 3 months)

Built and maintained a React and NestJS SaaS platform supporting 700,000+ active users, including authentication, workspace management, Stripe webhook-driven billing, and real-time collaboration. Developed BullMQ workflows that reduced synchronous timeouts and lowered error rate from 3.2% to under 0.1%, and created an accessible React design system with Storybook/Tailwind/Radix that reduced new UI

React NestJS Webhooks BullMQ Redis OAUTH2 OpenID Connect Docker Gitlab CI

Junior Fullstack Developer

Offsiteteam

Jul 2017 - Mar 2020 (2 years 8 months)

Developed React UI pages and Express.js REST APIs, managing Sequelize/TypeORM migrations across PostgreSQL and MySQL with backward-compatible rollout strategies. Built BullMQ scheduled workers and added Redis caching and front-end performance improvements, replacing manual cron jobs and reducing API response time and bundle size by 30%+.