Available for Senior / Lead roles

Luis
Fernando
Cifuentes.

Senior Backend Engineer · Go · Distributed Systems

Building high-performance distributed systems with +8 years of experience. Full ownership from architecture to production — including rebuilding critical systems from scratch working directly with clients.

~ engineer.go
$go run engineer.go
> loading: distributed systems
> stack: Go · K8s · Redis · AWS
> status: ● production ready
> exp: +8 years
> lang: Go (primary)
> arch: event-driven · microservices
70K+
users served
80%
latency drop
62K+
records managed

Who I am.

Backend Engineer with +8 years building distributed systems and high-performance APIs in Go. I specialize in event-driven architectures, async processing with workers and queues, and production observability.

I take full ownership of problems — from design to production. My track record includes rebuilding systems with critical design flaws, working directly with clients to arrive at the right solution. A key example: an authentication system rebuilt from scratch, now serving 70K+ users across 5 platforms with zero incidents post-launch.

I've built and technically led marketplace, fintech and SaaS platforms deployed on AWS and Azure over Kubernetes with CI/CD. I design solutions oriented around availability, latency and cost — and mentor teams to scale delivery without sacrificing quality.

70K+
Users served by Auth Manager — rebuilt from scratch with zero post-launch incidents
80%
Response time improvement after migrating services to Go + FastAPI
62K+
Records managed in Luxio (28K maintenance + 34K investigations) with background notifications
8K
Registered users on NomadOS with ~2K active or historical memberships

My stack.

Core Backend
Go goroutines channels Python FastAPI Node.js TypeScript PHP Laravel
Architecture
Microservices Event-Driven DDD Clean Architecture REST OAuth 2.0 SOLID TDD
Cloud & DevOps
Kubernetes AWS Docker Azure GitLab CI/CD Infra-as-Code
Data & Observability
Redis PostgreSQL MongoDB MySQL Workers Queues Structured logging SLA monitoring

Featured projects.

Admin Platform · Private Client
Centralized Admin Platform

Unified scattered admin modules into a single panel, defining the internal standard for admin module development. Automated flat-file record loading, eliminating hours of manual work per cycle.

28K
Maintenance
34K
Investigations
GoRedisSQL ServerDocker
SaaS · Online Learning
NomadOS

Online learning and workflow automation platform. Cloud integrations on AWS with end-to-end continuous deployment. Active user base with paying memberships.

8K
Users
~2K
Memberships
GoLaravelNode.jsAWSPostgreSQLGitLab CI/CD

Experience.

Tech Lead — X-Grow AI
WACO Services · Remote
  • Defined Go backend architecture exposing REST APIs and MCP servers consumed by LLM agents and automation flows (N8N).
  • Designed async chatbot interaction processing to sustain traffic spikes without latency degradation using workers and queues.
  • Established observability standards (structured logs, metrics, alerts) and team onboarding documentation.
Oct 2025 — Present
Senior Backend Engineer
WACO Services · Remote
  • Designed and implemented microservices in Go and Node.js for internal and third-party integrations, prioritizing concurrency, high availability and low latency.
  • Built CI/CD pipelines on AWS and Azure with GitLab, significantly reducing deployment time and eliminating recurring manual errors.
  • Led architecture decisions, standardized integration templates and mentored the team in Go and FastAPI, improving response times by 80%.
Aug 2020 — Present
Software Developer
Oktal Desarrollos Tecnológicos · Cali, Colombia
  • Took full ownership of a legacy PHP 5.3 → 7.0 migration end-to-end, improving response times by 90% and eliminating tech debt blocking new features.
  • Designed PHP/Laravel web services integrated with external APIs, optimizing critical queries and processes.
Sep 2016 — Aug 2020
Let's talk.

Open to Senior Backend Engineer and Tech Lead roles — remote or Colombia. Especially interested in high-scale, distributed systems challenges.