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Juber Saenz
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Juber Saenz

Hi, I am Juber Saenz

Senior Systems & Full Stack Engineer

I design and build scalable architectures, logistics platforms and cloud-native microservices that move millions of operations every day.

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Years of experience
6+
Production projects
20+
Uptime delivered
99.9%
Juber Saenz

Juber Saenz

@juberdev01

Remote · UTC-5

Stack

Full

Focus

Backend

Status

Open

~/portfolio
  1. $ whoami
  2. > juber · senior systems engineer
  3. $ cat stack.json
  4. > { backend: 'NestJS·Go', cloud: 'AWS·Docker' }
  5. $ npm run build
  6. > ✓ 24 microservices ready in 1.2s
  7. $ git log --oneline -1
  8. > feat: ship scalable architecture
  9. $ status --check
  10. > ready to build
GitHub 12K followers LinkedIn 3K followers

About me

I am a Senior Systems Engineer who designs distributed systems for logistics and e-commerce. My work spans cloud-native microservices, ETL pipelines, observability and developer experience — always with a strong product mindset.

For the past several years I have led the design and delivery of platforms handling millions of orders across complex omnichannel logistics. I bridge product, infrastructure and code: shaping APIs that scale, observability that catches incidents early, and developer tooling that lets teams ship faster.

I am pragmatic about technology. I pick tools to solve real business problems — not the other way around. I believe in clean architecture, strong typing, automated tests, and code that future-you will thank present-you for.

Drag to rotate

Scalable architecture

Domain-driven microservices, event-driven systems, API gateways and message brokers (NATS / RabbitMQ).

Cloud & DevOps

AWS, Docker, CI/CD pipelines, infrastructure as code, observability and SRE practices.

Product mindset

I align engineering with business outcomes — from discovery and roadmaps to delivery and metrics.

Mentorship

I lead engineers, run technical interviews, and grow teams that own their stacks end-to-end.

Skills & tools

A curated stack from years of building products end-to-end — from product discovery to production observability.

Frontend

  • TypeScript
  • React
  • Next.js
  • Astro
  • TailwindCSS
  • Vue

Backend

  • NestJS
  • Node.js
  • Spring Boot
  • Java
  • Python
  • GraphQL

Databases

  • PostgreSQL
  • MySQL
  • MongoDB
  • Redis
  • BigQuery

Cloud & DevOps

  • AWS
  • Docker
  • Kubernetes
  • GitHub Actions
  • Terraform
  • Grafana

Architecture

  • Microservices
  • Event-Driven
  • NATS
  • RabbitMQ
  • DDD
  • Clean Architecture

Experience

A timeline of engineering roles across logistics, retail, healthtech and payments.

  1. Saga Falabella

    Oct 2023 — Present

    Senior Software Engineer · Full Stack

    Lima, Peru

    Lead the design and delivery of scalable logistics platforms built on microservices and micro-frontends, defining the technical standards and architecture for internal solutions.

    Key achievements

    • Architected Tinkuy, a modular platform built with Angular, Module Federation, NestJS and NATS.
    • Defined technical standards, architecture and development guidelines adopted across internal teams.
    • Built ETL platforms, automations and analytical dashboards to optimize operations.
    • Coordinated technical teams and drove decisions on design, scalability and performance.
    • Standardized Docker and PostgreSQL deployments across multiple environments.

    Stack

    Angular Module Federation NestJS NATS Docker PostgreSQL

  2. Automatízate Negocios

    May 2023 — Oct 2023

    Semi-Senior Backend Developer

    Lima, Peru

    Backend developer building scalable APIs for medical and business software, including the Doctor App and a pharmacy ERP.

    Key achievements

    • Built scalable REST APIs with NestJS and Laravel integrated with SQL Server.
    • Developed Doctor App with a robust, scalable NestJS architecture.
    • Implemented WebSockets for real-time communication and a better user experience.
    • Contributed to a pharmacy ERP tailored to the sector processes.
    • Took part in functional design and database modeling for medical solutions.

    Stack

    NestJS Laravel SQL Server WebSockets

  3. Grupo Harctech

    Feb 2021 — Apr 2023

    Full Stack Developer

    Lima, Peru

    Delivered end-to-end platforms — from backend and databases to admin panels — for clinical, logistics and payments products.

    Key achievements

    • Developed REST APIs on Oracle and MySQL, optimizing queries, stored procedures and DB performance.
    • Mi Ruta App: used Neo4j (graph database) to optimize route calculations.
    • Clinical History project: built backend services and optimized the database for operational efficiency.
    • Integrated payment gateways (iZipay) and messaging systems (Firebase, Altiria).

    Stack

    NestJS Oracle MySQL Neo4j Firebase

  4. Beyson Corp

    Jan 2020 — Dec 2021

    Full Stack Developer

    Lima, Peru

    Built performant REST APIs and React admin panels backed by well-modeled MySQL databases.

    Key achievements

    • Designed and modeled MySQL databases based on business requirements.
    • Developed REST APIs with Laravel and NestJS focused on performance and scalability.
    • Built React admin panels integrated with the backend services.

    Stack

    Laravel NestJS React MySQL

  5. Heydru

    Mar 2019 — Dec 2019

    Frontend Developer

    Lima, Peru

    Created dynamic, interactive web experiences with React, delivering clean, modular and efficient code.

    Key achievements

    • Built interactive interfaces with React across multiple projects.
    • Collaborated with the team on design and development, ensuring clean, modular code.

    Stack

    React JavaScript CSS

  6. Marketing Focus

    Jun 2018 — Feb 2019

    Frontend Developer

    Lima, Peru

    Built engaging web experiences — landing pages and online stores — designed and prototyped in Figma.

    Key achievements

    • Developed landing pages and e-commerce storefronts focused on conversion.
    • Translated Figma designs into responsive, pixel-accurate interfaces.

    Stack

    JavaScript HTML CSS Figma

Selected projects

Production-grade systems I have designed, built or led. Click through for source code and live demos where available.

Featured

ETL Platform

Distributed ETL platform ingesting millions of logistics events per day. Pluggable connectors, schema validation, retries, dead-letter queues and BigQuery sinks. Built for backpressure and replay.

  • NestJS
  • BigQuery
  • NATS
  • Docker
  • TypeScript
Featured

Logistics Dashboard

Operations dashboard for last-mile and warehouse teams. Real-time order tracking, SLA monitoring, driver assignment and incident management — used daily by ops at scale.

  • React
  • Next.js
  • WebSockets
  • PostgreSQL
  • Redis

Microfrontend Platform

Module Federation–based shell that composes independently deployed apps. Shared design system, runtime routing, contract testing and isolated deploys per team.

  • Module Federation
  • React
  • Webpack
  • CI/CD

Boards · Jira/Trello-like App

Collaborative project management tool with drag & drop boards, sprints, real-time presence and granular permissions. Optimistic UI with conflict resolution.

  • Next.js
  • tRPC
  • PostgreSQL
  • Pusher

Electronic Billing System

SUNAT-compliant electronic invoicing service. Digital signature, XML generation, queue-based delivery and a portal for issuers to track and resend documents.

  • Java
  • Spring Boot
  • RabbitMQ
  • PostgreSQL
Featured

NestJS Microservices Platform

Reference NestJS microservices platform with API gateway, NATS messaging, OpenTelemetry tracing, centralized auth and per-service Docker images shipped via CI/CD.

  • NestJS
  • NATS
  • Docker
  • OpenTelemetry
  • AWS

Architecture showcase

A reference architecture I implement and evolve in production — event-driven, observable and cloud-native.

Edge

API Gateway

Single entry point. Auth, rate-limit, routing & contracts.

CDN & Edge

Static assets, image optimization and edge caching.

Services

Auth Service

Identity, sessions, roles and view-level permissions.

Orders Service

Order lifecycle, state machines and SLAs.

Logistics Service

Fulfillment, routing and last-mile orchestration.

ETL Workers

Stream + batch jobs feeding the data warehouse.

Data & Messaging

NATS / RabbitMQ

Event bus for asynchronous communication.

PostgreSQL

Transactional store per bounded context.

Redis

Caches, queues and ephemeral state.

BigQuery

Analytical warehouse for BI and ML.

Infrastructure

AWS

ECS, RDS, S3, SQS — managed and cost-aware.

Docker

Reproducible images shipped through pipelines.

CI/CD

Test, build, scan, deploy — every commit.

Observability

Metrics, logs and tracing via OpenTelemetry.

Let's build something great

Looking for a senior engineer for your team or your next product? I usually reply within 24 hours.