Our field-service software suite is now live on the App Store and Google Play — see the build

What we build

Production software, shipped end to end.

We design and build native mobile apps, web apps, and the secure backends behind them — from a discovery conversation to the App Store, Google Play, and a live URL. We handle the parts most shops skip: security hardening, store-compliance review, and ongoing support.

Engagements are scoped tight: a clear problem, a measurable outcome, and a deliverable that lives in your repo, not a slide deck.

Start a conversation

What we build.

Native mobile, web, secure backends, and the AI decision systems on top — end to end, on your stack, measured against your numbers.

Native mobile apps

iOS and Android from one Expo / React Native codebase — background GPS, geofencing, camera, push, and e-signature — submitted and shipped through the App Store and Google Play.

Web apps

Modern Next.js / React 19 web apps — public marketing and intake surfaces plus authenticated portals in one app, continuously deployed.

Secure cloud backends

Supabase Postgres with real schema design, role-based access enforced at the database with Row-Level Security, Edge Functions, storage, and scheduled jobs.

AI decision systems

Scoring and ranking that shows its work, tells you how confident it is, and learns from real outcomes — with a person approving every change.

Document & data intelligence

Retrieval that reads the whole corpus and cites its sources — hybrid search, neural reranking, and self-checking so answers never come from bad context. PDF-to-structured extraction with human review, cross-document discrepancy detection, and Q&A that can't invent a number.

End-to-end delivery

Discovery to launch — security hardening, store-compliance packets, and release management under our own developer accounts. You get a working login, not paperwork.

Flagship build Two products · both app stores · one secure backend

See it in one build: a full field-service software suite.

A native crew-ops app for iOS and Android, a live ROI lead-triage web app, and a homeowner portal — designed, secured, and shipped end to end for a Long Island remodeling contractor.

Explore the case study
Enterprise capability For PE, healthcare & regulated teams

Document intelligence for high-stakes decisions.

Investment firms and operators drown in documents — board decks, financials, filings, contracts — where a single contradictory number changes the decision. We build retrieval systems that read the whole corpus, return sourced answers, flag discrepancies across documents, and refuse to invent a number. Grounded in GSP-Intel, a production platform our team built from the ground up.

  • Hybrid retrieval over a hierarchical summary tree (RAPTOR)
  • Query expansion (HyDE) + neural reranking
  • Self-checking retrieval — no answers from bad context
  • Cross-document discrepancy detection, fully cited
  • LLM-as-judge evaluation on every release
  • Delivered through MCP — ask in Claude, get sourced answers
See the GSP-Intel case study

Answer · sourced from your corpus

Cited

Query

What was the Q4 fill rate?

94.2% · Board Deck Q4 '25 · p.12Cited
⚠ Conflicts with Ops Report — 91.8%Flagged

Every number traced to a source. Illustrative.

Ready to ship?

Tell us what you're trying to move.

A scoped plan beats a pitch. Send us the metric, not the spec — we'll come back with a focused proposal in 2 business days.

Start a conversation toneill@coastalai.io dswensen@coastalai.io