I build your
vision,
from UI to database.

I'm Tomáš Spáčil from Liberec, Czechia. For the past 6 years I've been building modern web apps in Next.js, React and TypeScript - ERP and CRM systems, SaaS platforms and sites with payment gateways, end to end or as part of a client's team.

Get in touch Selected projects

// Stack

Next.jsTypeScriptPostgreSQLReactPrismaVercelTailwindNode.jsGraphQLStripeNext.jsTypeScriptPostgreSQLReactPrismaVercelTailwindNode.jsGraphQLStripe

// Frontend · Backend · Infra

What do I work with?

Frontend

I build component systems and complex form workflows, page caching and image optimization. Among the biggest challenges were migrating a large monorepo from the Pages router to the App Router and splitting a monorepo into individual NPM packages shared internally.

Next.js (App Router)ReactTypeScriptTailwindCSSSASSMUIReact Hook FormZodZustand

Backend & API

Server logic, API design and third-party integrations. I implemented the GP WebPay payment gateway in Node.js based on the PHP docs - signatures, callbacks and the whole transaction flow. Also an AI pipeline with streamed output (SSE) and a Meta Business API integration.

Node.jsServer ActionsRESTGraphQL (Apollo)AuthenticationWebhooksPayments (Stripe, GP WebPay)Resend

Data

Data model design, migrations and optimization. The hardest part was migrating sixteen years of data from three different systems into a single schema - dealing with duplicates, inconsistencies and the entire photo bank. From relational databases to a headless CMS for editorial content.

PostgreSQLPrismaDrizzleFirebaseStrapiDirectus

Infra & tooling

Deployment, operations and everyday tooling. From Vercel and self-hosted servers through Coolify and the cloud (AWS, Azure, Google Cloud) to observability with Sentry, analytics and CI. I keep Claude Code at hand every day for faster iteration.

VercelCoolifyAWSAzureGoogle CloudTurborepoSentryGitHubClaude CodeGoogle Analytics

// Work experience

Where and what I've worked on

07/2024 - present

2 years 1 month

Prague/Jičín

cbData

Tech Lead · Next.js

Product: A large multi-tenant platform and CRM ecosystem built on a big frontend monorepo. I combine hands-on development, architectural decisions and technical team leadership.

Building new features for multiple clients - redesigns, payments, backoffice
Refactoring - migration from Pages → App Router, redesign of core packages and bundling them into internal NPM packages
Refactoring #2 - migration from Styled components to Tailwind
Analytics layer - GA4, custom event tracking, dashboards
Tech Lead role: code standards, reviews, architecture proposals, mentoring
Performance optimization: LCP, TBT, rendering, image handling and metrics

Next.js 14+ReactTypeScriptTurborepoTailwindMUINode.jsGoogle Cloud

07/2023 - 07/2024

1 year 1 month

Prague

inveo.

Fullstack Developer · Next.js

Top project: An AI content automation platform - creating and publishing social media posts from emails and structured data.

Modular UI component system in Next.js + TypeScript
AI pipeline: prompting strategies, SSE streaming, controlled generation
Meta Business API integration - authentication, publishing, scheduling
Editorial workflows and rich forms for managing generated content

Next.jsReactTypeScriptNode.jsRESTGraphQLMeta API

07/2021 - 07/2023

2 years 1 month

Prague

DIGIVERSE

Fullstack Developer · Next.js

Top project: A complete solution for three charity running platforms.

GP WebPay payment gateway implemented in Node.js without docs - signatures, callbacks, transaction flow
Registration and donation flows, photo galleries, landing pages
Participant export/import tools, performance-optimized pages
Working directly with organizers - turning needs into intuitive flows

Next.jsReactNode.jsGP WebPayREST

08/2019 - 12/2022

3 years 5 months

Czechia

TS Industry

Fullstack Developer / Contractor

My own company - end-to-end development of web apps and internal systems for various clients.

Websites and internal business applications
ERP and CRM systems - managing orders, bills of materials, customers, etc.
Data structures and optimization: PostgreSQL, Drizzle
Technical consulting, performance tuning and long-term support

Next.jsReactTypeScriptNode.jsPostgreSQLPrisma

// Selected projects

Architecture, code, and strategy. How I build apps in practice.

All case studies

Psychometrics

A psychometric testing platform with age-normed results, sharing with experts and a gamified approach.

Next.jsPostgreSQLStripe

Dating agency

A complete redesign of a dating agency and migration of sixteen years of data from three legacy systems into one platform.

Next.jsPostgreSQLCloudflare R2

Charity

A set of three charity running sites - unifying and fully typing an inherited project, GP WebPay payments and Strava leaderboards.

Next.jsGraphQLStrapi

B2B · ERP

An internal ERP for a manufacturing company - inquiries, quotes, orders, bills of materials and warehouse. From design to on-premise operation on the client's server.