01
Steuer
Invoices that arrive on their own and land reconciled in Linx.
Full stack engineer · from tax capture to the Linx entry
Bun · Fastify · TypeScript · Zod · Prisma · MySQL
12kinvoices processed per month
01 Cases · in production
Systems that keep businesses running.
Tax integration with an ERP, workplace-safety operations with a field app, AI-driven sales prospecting and a two-location gym’s operation. These are systems I built for companies, running in production. Each study covers the business problem, how the solution works inside and the impact it delivered.
- systems in production
- 4
- business domains
- 9
- technologies in the stack
- 45
02
Pick by problem.
Filter by area, domain or technology and open the full study of each system.
- 02
Kippis
Workplace safety in the pocket of the people on site.
Full stack engineer · lead for the mobile app and safety rules
Go · Fiber · PostgreSQL · Expo · React Native · TypeScript
5legal deadlines watched every night - 03
LeadSpector
From 300,000 companies to the right pitch, with AI citing its sources.
Full stack engineer · frontend, RAG, insights and search
Go · Rod · Apache Spark · PostgreSQL · Neo4j · Elasticsearch
300kcompanies searchable in seconds - 04
GymOS
Enrollment, billing and check-in for two gyms in a single system.
Full stack engineer · custom build, end to end
Next.js · React · TypeScript · Tailwind CSS · NestJS · Prisma
500+active members managed
Nothing matches that combination.
Try a different term or drop a filter. Search looks at title, pitch, client, role, domains and technologies.