Open: Fractional CTO · Advisory

GIL NETO

Founder-Engineer & Senior Software Engineer, AI Products

Senior engineer with 12 years' experience. I ship B2B utilities end-to-end — infrastructure to UI — solo, and I build LLM-backed systems where the model does judgment and deterministic code does correctness. Currently on a single Hetzner VPS: Kelaro (live accounting-automation SaaS), Koa (Python document-extraction engine, the deliberate alternative to vision-LLM extraction), and Augur (GRC tooling, EU-residency, parked).

Philosophy

01

Infrastructure-First

I own the boundary — from Cloudflare DNS to React component. Three products live on a single Hetzner CCX23: Docker, Nginx, Postgres 16, Temporal, self-hosted analytics, all containerized and reproducible. Runbooks and an infrastructure map kept in sync with prod.

DockerNginxHetznerPostgresTemporal
02

AI-Augmented Execution

AI coding agents kill boilerplate. That frees me to spend cycles on system architecture, data modeling, and business logic — not scaffolding. The result: solo-shipping multiple products without cutting corners on tests, types, or observability.

Claude CodeAI AgentsType-strictCI-gated
03

Scope Discipline

Code is a tool to solve business friction and, as such, I build stateless, low-liability utilities with operational impact. Currently, six projects parked and three shipped.

B2B SaaSKill-fastOperational Impact

Experience

1/2026 – Present@ Self-directed

Independent Founder-Engineer

Building and operating B2B utilities solo — infrastructure, backend, UI, billing, ops — on a single Hetzner CCX23 VPS, plus contract work as a senior full-stack engineer on AI product teams.

  • Kelaro (live, kelaro.io) — accounting-automation SaaS in closed beta with active pilots (PT chartered accountant, NL).
  • Koa — deterministic document-extraction engine powering Kelaro's pipeline, built as the deliberate alternative to vision-LLM extraction: balances must reconcile, and it refuses loudly rather than returning a plausible total.
  • Augur (tryaugur.eu) — GRC tooling for AI governance, EU data residency by design. Parked since July 2026 on capacity, not on thesis.
  • Single-VPS multi-product topology: Nginx, Docker, Postgres 16, Temporal, ImprovMX, Brevo SMTP. Authored infrastructure map and runbooks.
  • Agentic development pipeline with a decision gate ahead of specification, plus an agent-run knowledge system where guarantees live in lifecycle hooks rather than prompts.
Next.jsTypeScriptPythonTemporalPostgreSQLStripeDockerHetznerNginx
4/2021 – 1/2026@ Opplane

Lead Software Engineer

Promoted to Lead. Drove monolith-to-microservices migration and feature delivery across the enrichment platform while managing a development team.

  • Owned feature delivery for high-traffic enrichment pipelines processing data at production scale.
  • Designed and shipped the LLM-integration layer (prompt orchestration, structured-output extraction) powering production enrichment workflows.
  • Stood up the observability stack (Grafana, CloudWatch, structured logging), reducing incident MTTR.
  • Mentored junior engineers across teams of 4–5. Introduced code-review and CI quality gates that lowered regression rate.
PythonFlaskKafkaAWS LambdaAWS CloudWatchGrafanaPostgreSQL
3/2020 – 4/2021@ Opplane

Senior Software Engineer

Joined as Senior to tackle full-stack challenges in a high-paced environment.

  • Built and maintained a scalable design system consumed across multiple product surfaces.
  • Owned front-end architecture decisions (state, routing, build) across feature teams.
  • Drove client-facing projects across sectors (health, retail, others).
ReactJSNode.jsNest.jsTypeScriptSASSReact NativePubNubGCP
1/2018 – 2/2020@ Glartek

Front-end Lead Developer

Built and led the front-end for Glartek's core industrial-IoT product across multiple iterations. Defined the component library, build pipeline, and front-end architecture that supported enterprise deals with industry-leading manufacturing and oil & gas companies.

ReactJSTypeScriptJavaScriptSASSWebpack
9/2013 – 1/2018@ Link Consulting

Analyst / Consultant

Delivered features across multiple enterprise applications. Final two years: on-site systems administrator for a major oil & gas project in Kuwait, owning operations and incident response.

Shipped Projects

Kelaro

Live · Closed Beta

Accounting-Automation SaaS

B2B SaaS for fractional CFOs and accountants. Ingests bank PDFs and Open Banking (PSD2) feeds, runs deterministic extraction via an internal engine (Koa) orchestrated by Temporal, and emits accountant-ready datasets. Active pilots: PT chartered accountant + NL.

Infrastructure

Next.js + Postgres 16 + Temporal workflows on Hetzner. Stripe integration with founder-discount pipeline (coupons, promo codes, 30-day trial). Admin dashboard for Users / Waitlist / Promo Codes / MRR. OAuth 2.0 against GCP and Azure Entra ID enterprise tenants.

Next.jsTypeScriptTemporalPostgreSQLStripeOAuth 2.0PSD2

Augur

Parked

GRC Tooling for AI Governance

Compliance and audit tooling targeting EU-regulated buyers. Designed for full EU data residency end-to-end — self-hosted analytics, EU-only infra, no third-party trackers. Landing live and lead capture wired. Parked since July 2026: the thesis was never disproven, capacity was the binding constraint.

Infrastructure

Fastify + Postgres on Hetzner behind Nginx with TLS. Self-hosted Umami for privacy-first analytics. ImprovMX inbound mail. Same VPS as Kelaro — single-box multi-product topology.

FastifyPostgresNginxDockerUmamiHetzner

Koa

Engine

Deterministic Document Extraction — the Alternative to Vision-LLM

Config-driven extraction system that turns bank-statement PDFs into structured JSON. Built deliberately against the vision-LLM approach: balances have to reconcile and the engine refuses loudly when they don't, rather than returning a plausible total. A confidence score is not a proof. Three components: a Python/FastAPI engine, a Next.js + Prisma mapper UI for authoring per-bank templates, and an isolated PII scrub container. Powers Kelaro's extraction pipeline.

Infrastructure

Python 3.12 / FastAPI with pdfplumber + pikepdf for native PDFs and Tesseract / PaddleOCR fallback for scans. Pydantic schemas end-to-end. mypy strict, ruff, CI-gated, auto-deployed via GitHub Actions on push to release branch.

Python 3.12FastAPIPydanticpdfplumberPaddleOCRNext.jsPrismaDocker

Tech Stack

Languages

TypeScriptPythonSQL

Frameworks & Runtime

Next.jsReactNode.jsNest.jsFastifyFlaskTemporal

Infrastructure & Cloud

DockerNginxHetznerKafkaPostgreSQLMongoDBRedisBullMQAWSGCP

Integrations

StripeOAuth 2.0Open Banking (PSD2)BrevoUmami

Writing

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Available for fractional & advisory

Let's build something.

Open to fractional CTO and advisory engagements, not full-time - my days are mostly spoken for, but I keep room for one or two outside problems worth the time. Remote-first (EU timezones), Lisbon-based. Hard problem that needs end-to-end judgement, infra to UI? Let's talk.

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© 2026 Gil Neto. All rights reserved.

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