Merlin Elbers
Focus on performant web apps, automation, and scalable systems
What I Build
Maintainable architecture, clear data flows, measurable reliability.
Business rules as domain models and stable interfaces, so extensions remain manageable.
Logging, metrics, error paths, deployments: not done until the system is explainable in production.
UI to background jobs: one stack, one responsibility, no gaps between product and infrastructure.
Selected Projects
No Dribbble demos. Details largely under NDA.
Next.js · MySQL · FastAPI · Multi-Tenant · Charts
Problem
Contracts, orders, and customer records were scattered across siloed tools and Excel sheets. No unified view, no reliable KPIs.
Solution
Contract-based ordering system with master data, system notifications, and real-time analytics. One platform instead of many workarounds.
OAuth2 · LDAP · Azure AD · RBAC · JavaScript SDK · FastAPI · Next.js · PostgreSQL
Problem
Multiple applications, one organization — without a central identity layer, permission management becomes unmanageable.
Solution
Unified auth layer with role model via Azure groups, LDAP integration, and a custom SDK for downstream applications.
React · Next.js · MariaDB · Terminal UI · FastAPI
Problem
Inspection logs, machine scheduling, and shift planning ran on paper and verbal handoffs. No auditability, no traceability, and significant idle time.
Solution
Digital process platform with machine utilization tracking, inspection logs, and a terminal interface. End-to-end digitization of a manual process without media breaks.
Next.js · FastAPI · ERP-API · SQLite · Datenvisualisierung
Problem
Production, order, and purchasing data lived in the ERP — but not in a form that supports decisions.
Solution
Integrated reporting system with public holiday logic, aggregated KPIs, and visual reports. Data becomes a basis for decisions.
LoRaWAN · TTN · AT Commands · UDP · Netatmo API · Flask · MySQL · RESTful · JQuery · Multi-Tenant · Charts
Problem
Turf conditions and environmental data were recorded manually — no real-time visibility, no history, no foundation for targeted maintenance decisions.
Solution
End-to-end IoT system: custom-built and programmed sensor hardware via COM bus and AT commands, LoRaWAN transmission via TTN, custom UDP server as ingestion layer — visualized in a logging dashboard enriched with Netatmo weather data.
Runtime & UI
Backend & Data
Auth & Identity
IoT & Protocols
AI & Automation
Visualization
Testing & Quality
Product & Operations
Tech Stack
My stack varies by project. Boundaries and layers stay intentional.
About Me
I work best where product, data model, and infrastructure converge. That's where quality shows, not in the UI, but in stable releases, traceable decisions, and systems that perform under real load. My focus is on architecture, clear interfaces, and solutions that stay maintainable long-term.
"Code is good when it works in production - not just in review."
Contact
Whether freelance, a role, or a defined project scope.
