Backend Developer · Argentina

Martín
Coronel

APIs · Databases · Cloud Infrastructure

Backend developer working in Java. I build APIs, design databases, and put together distributed systems. Lately focused on secret management and keeping applications stateless.

Java Spring Docker PostgreSQL Redis Linux VPS Git JWT Auth API Design DB Design Arduino/ESP MQTT Embedded Python LangChain
Bonusbissen In Progress

Loyalty and rewards platform for a business: employees grant points to customers, who redeem them for rewards through employee-verified exchange codes. Includes an admin approval flow for exchanges, top-client/top-reward stats, and JWT auth for both employee and customer roles. Currently with a ready points store, with plans to grow into a full fidelity system.

Java Spring Boot PostgreSQL JPA Next.js TypeScript JWT Auth Docker
Kenoma In Progress

Privacy-first B2B SaaS platform I'm building: a reactive, multi-tenant microservices system providing authentication, organization management, secrets handling, and inventory management as composable backend services. Fronted by nginx, with a React admin UI and a Grafana/Loki/Prometheus observability stack.

Java 25 Spring WebFlux Multi-tenant SaaS React nginx
Raum

Kenoma's organization and credential registry. Provisions tenants, registers services, and issues short-lived database credentials through OpenBao so downstream services never hold long-lived secrets. Also owns billing: per-module pricing, multi-currency invoicing, and disaster-recovery backups.

Java 25 Spring WebFlux R2DBC OpenBao PostgreSQL Redis Billing
Vassago

Kenoma's authentication and identity service. Issues and validates ES256 JWTs via OpenBao's transit engine, manages sessions in Redis, and handles the full user lifecycle, including email-based password recovery.

Java 25 Spring WebFlux R2DBC OpenBao JWT / ES256 Redis
Bime

Kenoma's multi-tenant inventory service, with tenant data isolated at the data layer. Supports products with configurable metadata, multi-option variants, an append-only stock ledger, and low-stock alerts.

Java 25 Spring WebFlux R2DBC PostgreSQL Multi-tenant