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Software engineer building products that scale.
8+ years shipping SaaS platforms, event systems, and developer tools. CTO-level architecture meets hands-on engineering — Dallas, TX.
Full-stack engineering
Next.js + tRPC + Drizzle + Postgres. From schema to UI, including the boring parts. Strict typing, real error handling, no shortcuts that bite you in week three.
export const projectRouter = router({ byId: publicProcedure .input(z.string().uuid()) .query(({ input }) => db .select() .from(projects) .where(eq(projects.id, input)) ), });
DevOps
Vercel, AWS, Terraform. CI/CD pipelines with real gates. Production observability via Sentry + OpenTelemetry. Deploys you can roll back without praying.
resource "vercel_project" "portfolio" { name = "leonardoacosta-dev" framework = "nextjs" git_repository = { type = "github" repo = "leoleonardoacosta/la" } }
System design
API contracts, event flows, multi-tenant data models. CTO-level decisions, not committee diagrams. The boring choices that pay off over years.
// Outbox pattern: events written in same tx as state await db.transaction(async (tx) => { await tx .update(orders) .set({ status: 'paid' }) .where(eq(orders.id, orderId)); await tx.insert(outbox).values({ event: 'order.paid', payload: { orderId, amount }, }); });
Mentorship
1:1 architecture reviews, code-review coaching, hiring rubrics. I help engineers grow without burning them out — and help leads stop shipping the same bugs twice.
review_focus: - boundary_violations # cross-module leaks - test_first # red before green - rollback_safety # can we undo this in prod? - reader_optimization # cognitive load per line
SELECTED WORK
Built to scale.
Not just to ship.
Eight years of shipping platforms that survived growth, scale events, and the inevitable third-quarter pivot.
- ModernVisaNext.js · Stripe · Drizzle
- Otaku OdysseyNext.js · IOS · Android
Tribal citiesNext.js · PlanBy
Tavern LedgerNext.js · Three.js · GSAP
- Club KaijuTanStack · Redis
let's work on
your next big thing
unlock the potential of your business with premium software engineering, strategic business consultancy, and expert product management services.