nullfox
Ventures & engagements

Things I've built, for my own company and for others.

Bolinas Labsdbtpal.app

DBT Pal

A companion for practicing dialectical behavior therapy skills, day to day.

Built
Expo and React Native, local-first with on-device SQLite. A small Cloudflare Worker backs the AI Coach and subscriptions.
Status
Live
Stack
TypeScript · Expo · React Native
Bolinas Labsdonedose.com

DoneDose

A simple way to keep track of medications and know each dose is done.

Built
Expo and React Native, local-first with on-device SQLite. Syncs with Apple Health and Health Connect, plus an iOS home-screen widget.
Status
Live
Stack
TypeScript · Expo · React Native
Bolinas Labsgetformset.com

Formset

Forms without the form builder. Describe the form in chat, and Formset builds it, hosts it and reads the answers back to you.

Built
A remote MCP server on Node and Hono, backed by Postgres, with Google sign-in through Better Auth. It makes no LLM calls of its own; the assistant is the model.
Status
Live
Stack
TypeScript · Hono · Postgres
Log10everest.log10.io

Everest

An agentic AI platform for life sciences. Regulatory and clinical teams use it to produce submission-ready documents from their source data.

Role
Senior Staff Engineer
Built
The web application, integrated over gRPC with the data science team that owned the AI and retrieval pipeline.
Status
Live · SOC 2 Type II and HIPAA compliant
Stack
TypeScript · React · Postgres · gRPC
Lunchlunchpayments.com

Early payment platform

Early payment for vendors, offered through their city. Local governments partner with Lunch so the businesses they pay can get paid on approved invoices right away.

Role
Founding Engineer
Built
A TypeScript monorepo on Node and Hono, with Postgres and tRPC behind the React dashboards. Bank connections go through Plaid, and it runs on AWS, defined in code with CDK.
Status
Live
Stack
TypeScript · Hono · Postgres · tRPC
Latticelattice.com

Performance reviews

Starting a review cycle pre-created every review up front. For the largest customers that meant 50,000+ database writes inside a single request, and launches timed out.

Role
Tech Lead
Built
Led a small team rebuilding cycle launch as a durable, queue-based pipeline on SQS, with batched and parallel writes, de-duplication, per-item retries, and live progress customers could watch. Query and index work kept Postgres and its read replicas fast.
Status
Shipped · enterprise launches went from timing out to completing reliably
Stack
TypeScript · Node · GraphQL · SQS · Postgres
SiblyMental health

Sibly

A 24/7 mental health app that connected people with trained wellness coaches over private text chat, with AI in the background helping coaches choose evidence-based approaches and surface relevant employer benefits.

Role
Founding Engineer
Built
Replaced separate offshore-built iOS and Android apps with one React Native codebase the whole team could ship, with CodePush for over-the-air updates and Bitrise for store releases. Rebuilt the backend in TypeScript on AWS Lambda and Postgres, defined in Terraform.
Status
Acquired
Stack
TypeScript · React Native · JSON-RPC · Lambda · Postgres
Chptrchptr.com

Chptr

A social network for remembering people. Families and communities built memorial profiles for loved ones and public figures, and shared stories, photos and videos together.

Role
Founding Engineer
Built
Owned the whole stack as founding engineer: a TypeScript GraphQL API, an Expo React Native app and a Vite web frontend, plus an automated pipeline that turns uploads into memorial videos. Set up AWS and CI/CD so mobile shipped several times a week.
Status
Live
Stack
TypeScript · Expo · React Native · GraphQL · AWS · Postgres
Champifychampify.io

Champify

Revenue intelligence for B2B sales teams. It tracks when past customers and champions change jobs, so reps can reach out warm at the new company.

Role
Founding Engineer
Built
Sole engineer alongside the founders. Built the core data platform from scratch in under three months, moving the product off Salesforce Apex workflows onto a stack the company owned.
Status
Live
Stack
TypeScript · Apex · AWS Lambda · Postgres
Open to founding and fractional roles
[email protected]