Open to senior & freelance roles

I build systems
that don't
break.

Distributed systems engineer & tech lead. 10+ years shipping backend infrastructure in Rust, Go, and Ruby — from monolith migrations to real-time pipelines. Currently Founding Engineer at an early-stage B2B SaaS, architecting for scale from day one.

Trilingual FR / EN / ES  ·  Based in Paris, working globally.

Let's talk → LinkedIn ↗ GitHub ↗
Rust · Axum Go · gRPC Temporal · Workflow Orchestration Kafka · Event Streaming Kubernetes · Docker PostgreSQL · TimescaleDB Rails · Ruby Zero-downtime migrations Rust · Axum Go · gRPC Temporal · Workflow Orchestration Kafka · Event Streaming Kubernetes · Docker PostgreSQL · TimescaleDB Rails · Ruby Zero-downtime migrations
01

Experience

Sept 2024 — Present
Stealth B2B SaaS
CTO & Founding Engineer
Sole technical founder. Designed the full system architecture and made every stack, service boundary, and data modeling decision from the ground up.
Zero-downtime migration from Rails monolith to multi-service architecture in Rust (Axum) + Go, using a dual-stack strategy
Real-time data ingestion via WebSocket, backed by PostgreSQL + TimescaleDB for time-series workloads
Cross-service JWT auth + Tower middleware layer in Rust for unified request handling across all services
Temporal-based workflow orchestration for resilient, distributed task execution
Led frontend team of 2 (Flutter + React) — owned UX/UI decisions from design to production
Built and maintained full CI/CD (GitHub Actions, Docker multi-stage) on self-hosted infrastructure
RustAxumGo TemporalTimescaleDB WebSocketDocker
May 2022 — Mar 2025
Plezi
Lead Backend Developer
Technical lead on a B2B marketing automation SaaS. Drove the progressive decomposition of a Rails monolith into a distributed Go microservices architecture.
Designed and shipped Go microservices with gRPC APIs and Protocol Buffers (Buf/BSR)
Built event streaming infrastructure with Apache Kafka and CDC via Debezium
Implemented Temporal for complex long-running business workflows
Managed PostgreSQL, MongoDB, and ElasticSearch data layers at scale
Mentored backend engineers on Go, Rails, and Kubernetes deployment practices
GogRPCKafka DebeziumTemporal KubernetesRails
May 2019 — May 2022
Plezi
Full-stack Developer
Built and maintained React/TypeScript frontends and Ruby backends. Implemented the REST API layer end-to-end, following strict TDD/BDD practices.
RubyRails ReactTypeScriptTDD
02

Selected Work

2024
Digital Agency
Full SI Rewrite — Lnr
End-to-end rebuild of a digital agency's information system — from Figma mockups to a fully operational production stack. Monorepo TypeScript (pnpm + Turborepo) spanning three applications: public site, secured REST API, and a full administration dashboard.
Monorepo architecture with React 18/Vite frontend, Express REST API (JWT, RBAC 4-level, rate limiting, CSRF, Zod validation, audit logging), and React admin dashboard
PostgreSQL via Supabase with Prisma ORM — 9 migrations, 20+ models covering clients, bilingual EN/FR projects, taxonomies, CMS translations, and metrics
Atomic Design system strictly applied (24 atoms, 19 molecules, 18 organisms) with GSAP/Lenis animations, React Query + Zustand state management
Database-driven i18n system + dynamic CMS layout renderer with 9 block types (hero, image grids, columns, video, text, motion)
Drag-and-drop layout builder (dnd-kit), full media pipeline (WebP via Supabase Storage), email via Resend/Nodemailer
Self-hosted infrastructure — Docker Compose, Nginx reverse proxy, Supabase Storage media pipeline, containerized for production
Docker Compose infrastructure with Nginx reverse proxy — fully containerized, production-ready
TypeScriptReact 18Express PostgreSQLPrismaRBAC DockerGSAPi18n
03

Technical Stack

Systems
Rust · Axum Go Ruby · Rails gRPC · Protobuf REST API design
Distributed
Temporal Apache Kafka Debezium · CDC WebSocket · SSE Event sourcing
Data
PostgreSQL TimescaleDB Redis MongoDB ElasticSearch
Infrastructure
Kubernetes Docker GitHub Actions Argo CD Self-hosted infra
04

Open Source

Go ★ 1
stripe-payout-reconciler
CLI that reconciles Stripe payouts for a given period or amount into a clean, structured report.
github.com/navfa →
Rust
skills-md-graph
Rust CLI that parses AI agent SKILL.md files to extract and visualize capability graphs.
github.com/navfa
Ruby
subscription-engine
Drop-in Rails 8 engine that gives every SaaS app production-ready subscription billing — Hotwire dashboards, usage metering, and Stripe webhooks.
github.com/navfa

Hard problems.
Real systems.
Let's talk.

Available for senior engineering roles (CDI) and freelance engagements — distributed systems architecture, technical leadership, backend infrastructure, or founding engineer missions.

Based in Paris. Fluent in French, English, and Spanish.

navfastudios@proton.me linkedin.com/in/francois-anthony-navarro github.com/navfa