Starlin Gil Cruz — portrait

Starlin GilSoftware Engineer

I work with startups and growing companies to turn business problems into software that works, and to use AI where it saves real time and money.

01About me

Companies usually come to me with a specific problem: a product that needs to launch, a process that eats hours every week, or a system that slows down as the business grows. I start by understanding what success looks like for them, build the simplest thing that gets there, and improve it based on how people actually use it.

AI is part of that toolkit, not the goal. I use it where it clearly pays off, like answering routine customer questions, pulling information out of documents or speeding up internal work, and I make sure it is tested, secure and something the team can trust.

02Projects

A few things I've built recently, and what came of them.

AI · Company knowledge

Atlas AI

An assistant that answers employees' questions using the company's own documents. It shows where each answer came from and only uses information the person is allowed to see.

Cut internal support time by 35%

Next.jsTypeScriptAI SDKpgvectorPostgres

Live dashboards

Pulse

A dashboard that shows key business numbers as they change, alerts the team when something looks unusual, and is easy to share with anyone.

Saves 20+ hours of reporting a week

ReactWebSocketsNode.jsRedis

Payments

Payflow

A payment system that never charges twice by mistake, follows standard accounting rules, and keeps a complete history of every transaction.

1M+ payments a month, zero errors

NestJSPostgreSQLKafkaDocker

Online stores

Kiosko

Lets small businesses open their own online store in minutes, accept local payment methods, and keep selling even on a weak internet connection.

Used by 300+ small businesses

Next.jsStripePrismai18n

AI · Developer tools

Reviewer Bot

An assistant that reviews code changes against the team's own guidelines, points out risky changes and suggests tests. A person always makes the final call.

Code reviews 40% faster

TypeScriptGitHub AppsLLM EvalsVercel

Shared design kit

Nova UI

A shared set of interface pieces (buttons, forms, menus) that work for everyone, including people using screen readers. Four product teams build with it.

4 teams build screens 60% faster

ReactTailwindStorybookRadix

04Skills

What I reach for most often, grouped roughly by where it sits.

Frontend

TypeScriptReactNext.jsTailwind CSSVueAccessibility

Backend

Node.jsNestJSPythonFastAPIPostgreSQLRedisGraphQLREST

Cloud & deployment

VercelAWSDockerTerraformGitHub ActionsMonitoring

AI

AI assistantsAI searchOpenAI & Anthropic APIsAI agentsTesting AI outputPrompt writing

Ways of working

System designProduct thinkingMentoringAgile / ScrumClear communicationEnglish & Spanish

05Workflow

I use AI tools every day to write first drafts of code, tidy it up and check it. My job is the part a tool can't do: understanding the problem, setting the rules, and deciding what's good enough to release.

  1. Me

    01

    Plan

    I write down what we're building, the limits, and how we'll know it works. Clear instructions come from clear thinking.

  2. AI helps

    02

    Delegate

    AI tools write first drafts of code, tests and documentation, within rules I set.

  3. Me

    03

    Review

    I read every change myself. Nothing goes in until it passes automated checks and my own review.

  4. Together

    04

    Release & improve

    Updates go out automatically, and real user feedback shapes the next round of improvements.

  • People make the decisions, AI writes drafts
  • AI features are tested before users see them
  • Security and privacy from day one

Contact

Have a project or a role in mind?

Tell me what you're working on and where you want to take it. I'll reply with how I can help.

Send me an email