Legacy modernisation
Monolith to current architecture with no release freeze. Django, Rails, Next.js, Kubernetes, Terraform.
Risto Holappa — Oulu, Finland. I build and modernise production systems: Rails, Django, Next.js, PostgreSQL, AWS.
LinkedInreipas.io
What I do
Product build, spec to production
Spec, acceptance criteria, tests, release. Rails 8, Hotwire, PostgreSQL.
Claude Code in production
Team setup: skills, hooks, MCP servers, an eval harness in CI, prompt-injection checks.
Traceability and product data integrity
Origin, batch and certificate data in one model for online stores and marketplaces.
Measured results
Rakentaja.fi — 7-site product family
Monolith to current architecture: page loads 60 % faster, uptime 99.5 %. Editorial work continued through the migration.
Customer chat, Finnish banking group
2M+ end users, 100,000+ conversations a day. DORA and GDPR in the architecture, not bolted on afterwards.
Devometric
MIT-licensed RAG assessment platform: own eval harness, prompt-injection protection, airgapped runs on Ollama.
Willit
Small-producer marketplace from spec to production, built solo. Rails 8, Solid Trifecta, Hotwire.
Traceability and product data
I am currently building traceability and product data integrity into Willit: origin, batch and certificates in one data model, so every claim shown on a product page points at its source and the date it was recorded.
The same data model carries over to other online stores and marketplaces.