Service
Backend and API development with Spring Boot
Scalable APIs and secure data processing with Java, Spring Boot and PostgreSQL, designed to stay fast and maintainable as usage grows.
Spring Boot
PostgreSQL
Docker
AWS
What I do
What Spring Boot backend development includes
APIs and data that your frontend and your business can rely on.
REST API design
Clear resources, validation and error handling your frontend can rely on.
Spring Boot services
Java services structured for testing and long-term maintenance.
PostgreSQL modeling
Schemas, indexes and queries that keep response times low.
Security
Authentication and authorization with Keycloak (OIDC) and role-based access.
Integrations
Third-party APIs and webhooks connected securely to your domain.
Testing and observability
Automated tests and useful logs to catch problems before your users do.
Process
How we work on your backend
A short, predictable path from the first message to production.
A first message
Email or WhatsApp me about the problem or the role. I'll tell you honestly whether I'm a good fit.
A clear proposal
Scope, timeline and way of working, in writing.
Weekly deliveries
Progress deployed every week, so you make decisions based on real software.
Launch and handover
Production deployment, documentation and the code in your repository.
Who I work with
Who backend development is for
Remote from Colombia (UTC−5), with hours that overlap US business time.
Startups and founders
Turn an idea into a working MVP, scoped to launch fast and built to keep growing.
Product and engineering teams
Add a software engineer who owns complete features: frontend, backend and deployment.
Software agencies and studios
Extra capacity for Angular and Spring Boot projects, delivered in an orderly way.
Case study
KMApp: a Spring Boot API in production
Micro SaaS · 2025
KMApp
My own multi-tenant SaaS: a digital menu with ordering and delivery for small and mid-sized kiosks and restaurants. 60% less time answering WhatsApp by hand and zero order errors.
AWS · Docker · Angular · Spring Boot · PostgreSQL · Keycloak · GitLab
Read case study: KMAppFAQ
Questions about backend and API development
Yes. I design the contract with your frontend team and deliver it in increments.
PostgreSQL by default: reliable, well supported and ideal for relational data.
With Keycloak (OIDC), roles and, when needed, multi-tenant access.
Yes. I profile queries and endpoints and fix the bottlenecks, with measurable before-and-after numbers.