Nicholas Maassen

Full-stack engineer. Shipping software for users' actual workflows.

Contracting with Avodah Software since Feb 2024. Worked on 9 client products across payments, scheduling, AI-assisted healthcare, and multi-tenant admin tools, leading 4 end-to-end and contributing substantial slices to 5 more. Strong on translating ambiguous client asks into scoped launches, production hardening, and prompt engineering for agentic AI.

Currently Mid-level engineer looking for my next role at a devtools or AI company. Implementation engineer, forward-deployed engineer, customer engineer, or product engineer.

Selected Work

Cube Merge diff view on desktop: removals on the left, additions on the right, grouped by color. Cube Merge mobile view: same diff, stacked layout.

Cube Merge

Lighthouse 100/100 · 307 KB

TypeScript · React · Firestore · Cloudflare Pages

Real-time review tool for cube-building hobbyists. Immutable change log lets any anonymous user branch and re-share from any prior point, so identity-based trust is unnecessary. Six change types (swap / add / remove / keep / reject / decline), threaded @-mention comments, virtualized rendering for 500+ cards, CubeCobra-compatible export.

Trait Ranker desktop drag-and-drop interaction.

Trait Ranker

Lighthouse 99/100 · ~50 users

TypeScript · React · Firebase

Drag-and-drop pairwise ranking on desktop and mobile. Heap-sort surfaces a top-7, then merge-sort produces the final order, minimizing the comparisons users have to make. Includes a social guessing loop where friends try to predict your top traits before you reveal them. Anonymous Firebase sessions with exportable results.

Avodah Software (Feb 2024–present)

Contract · NDA-safe summary

TypeScript · React · Bun · Fastify · Cloudflare Workers · Supabase · Stripe Connect · Microsoft Graph · Deepgram

Worked on 9 client products at Avodah since Feb 2024 — led 4 end-to-end and contributed substantial slices to 5 more. Highlights: an AI-assisted healthcare workflow with streaming transcription, Microsoft Bookings/Teams integration, and parallel-agent LLM review; a GoHighLevel + Cloudflare Workers scheduling integration; a B2B used-car wholesale marketplace with Stripe Connect ACH escrow, FedEx integration, and an invite/onboarding flow.

Writing