Miguel Ángel Jiménez Ochoa

Miguel Ángel Jiménez is a Colombian senior full-stack engineer with 8 years shipping production software. His core stack is TypeScript, Node.js, Python, React/Next.js, PostgreSQL and AWS, with LLM integration and RAG. He leads a team of 2 to 4 developers and is open to remote senior roles and freelance projects.

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Senior Full-Stack Engineer · TypeScript, Node.js, Python/FastAPI, React/Next.js · Event-Driven Microservices on AWS · LLM Integration and RAG

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Professional Summary

Full-Stack Engineer with 8 years of experience shipping production software for retail, B2B e-commerce, HR tech, and SaaS platforms. I currently lead a team of 2 to 4 developers, own architecture decisions (Clean Architecture, microservices, event-driven services), and have integrated AI models (Claude, Gemini, OpenAI) into 4+ production applications. My backend production work is TypeScript-first, with Python in production from 2018 to 2022 at H3S and again from 2024: a FastAPI multi-provider LLM service, a retrieval-augmented generation (RAG) module I wrote in order to teach it, and a document-extraction engine. I also design analytical data models in SQL and dbt (data build tool) on PostgreSQL. Founder of 2 SaaS products built end-to-end. Core stack: TypeScript, Node.js, Python, React/Next.js, PostgreSQL, and AWS.

Technical Skills

Languages
TypeScript, JavaScript, Python, SQL, HTML/CSS
Backend
Node.js, NestJS, Express, Koa, Prisma, Knex, Python (FastAPI, Pydantic, httpx, uvicorn), REST API design, microservices, event-driven services and async job queues (BullMQ, Redis, RabbitMQ)
AI
Anthropic Claude (SDK, Bedrock, Agent SDK), Google Gemini, OpenAI, multi-provider LLM abstraction, RAG (hybrid retrieval with dense HNSW over pgvector plus lexical GIN search, RRF rank fusion, cross-encoder reranking, context budgeting, citation parsing, RAGAS evaluation), embeddings and vector search, parallel LLM request pipelines
Frontend
React, Next.js (App Router), React Native, Redux, Zustand, Tailwind CSS, Astro, Vue 3
Databases
PostgreSQL, MySQL, MongoDB, Redis, pgvector
Cloud & Infrastructure
AWS (EC2, S3, Lambda, RDS, SES, Bedrock), GCP, Docker, Terraform, CI/CD, Ubuntu Server, n8n
Data & Analytics
dbt (data build tool), analytical data modeling, multi-CTE SQL, PostgreSQL FDW, OLTP-to-analytics pipelines, query optimization and indexing
Payments
Stripe, QuickBooks Online (OAuth2), MercadoPago
Architecture
Clean/Onion Architecture, microservices, event-driven architecture, monorepos (Nx, npm workspaces), micro-frontends

Professional Experience

Senior Full-Stack Engineer & Tech Lead

June 2023 to present · Remote

Molt Solutions (formerly Algoritmo)

  • Lead a team of 2 to 4 frontend and backend developers: define technical tasks, set architecture standards, and support delivery across 5+ client projects in production.
  • Optimized database queries and parallel request handling against AI APIs for a talent assessment platform with 1,600+ active users and 10,000+ people assessed, reducing report response times.
  • Designed the backend of an AI video generation platform using Clean Architecture: an event-driven job pipeline with BullMQ and Redis for long-running generation workflows, Stripe billing, Clerk authentication, and 2 AI providers (Anthropic Claude and Bedrock).
  • Built a multi-tenant payment microservice in Express and TypeScript with 2 financial integrations (Stripe and QuickBooks Online via OAuth2), a dual-database design (MongoDB and PostgreSQL), and infrastructure as code with Terraform on AWS.
  • Integrated AI models (Claude, Gemini, OpenAI) into 4+ production apps: PDF reports, image tooling, and agent bridge services.

Analytics Engineer, dbt and PostgreSQL

August 2024 to September 2024 · Freelance

ClickPalm · Agricultural field-operations platform

  • Set up the dbt (data build tool) and PostgreSQL analytics stack in Docker (dbt-core 1.8, docker-compose, cron) on AWS EC2 inside the production VPC, with a PostgreSQL Foreign Data Wrapper (FDW) exposing 5 OLTP tables to the analytics database.
  • Authored the labor-efficiency data model: multi-CTE SQL over 4 dbt sources aggregating field visits into daily and interval productivity metrics per operator and zone. Owned data quality and delivery (schema tests, btree-indexed materialization, execution tags, pull-request review) as majority contributor over a five-week engagement.

Frontend Developer

February 2022 to February 2023 · Remote

Chiper

  • Built and maintained React and TypeScript frontend applications for 12 months on a B2B e-commerce platform serving neighborhood stores in 3 Latin American countries, integrating internal APIs and standardizing clean architecture across the new modules.

Full-Stack Software Developer

October 2018 to February 2022 · Bogotá

H3S SAS

  • Built and maintained 2 core production systems in PHP, Python, and Node.js over 3+ years, with Python part of the production stack for the whole period.
  • Delivered full-stack solutions for 40 months to clients across 3 sectors (retail, IoT, and telecommunications), assessing technical feasibility before implementation and adapting software designed for foreign markets to the Colombian environment through code-level customizations on third-party platforms.

Side Projects (SaaS in production)

Parqando ↗

Parking management SaaS built end-to-end solo: 4 apps (Node.js/Koa API with Prisma and PostgreSQL, Next.js dashboard with NextAuth, Astro landing, React Native app with thermal ticket printing and Twilio SMS), AWS S3 storage.

Secasan ↗

Wedding management SaaS for the Colombian market: automated RSVPs and cash gift collection via MercadoPago, operating across 2 segments (B2B and B2C).

Python Services

FastAPI service with a multi-provider LLM abstraction over Claude, Gemini, DeepSeek and Kimi (Pydantic models, httpx, uvicorn, 13 test modules), plus a Colombian income-tax return engine of roughly 8,300 lines with a document-extraction pipeline (pdfplumber, PyMuPDF, OCR, openpyxl) and JSON-schema validation.

Personal Infrastructure

Ubuntu server with Docker: 30+ containers with CI/CD serving my products, plus local AI models and n8n automation.

Teaching

Software Development Instructor

Since 2024

a programming academy (Uruguay)

Teaching 2 courses: full-stack JavaScript fundamentals and AI-assisted software development.

  • Wrote and teach the production RAG module in Python 3.12 (~93 modules, 19 test files, pytest coverage gate failing under 90%): hybrid retrieval with dense HNSW over pgvector plus lexical GIN search, RRF rank fusion, cross-encoder reranking, context budgeting, citation parsing, a RAGAS evaluation harness, and Docker Compose.

Education & Certifications

  • SENA: Software Programming Technician
  • freeCodeCamp & Platzi: JavaScript Algorithms and Data Structures; Frontend Developer, Software Engineering, Git/GitHub, and code best-practices tracks
  • EF SET: English Certificate, B2 (August 2026)

Languages

  • Spanish: native
  • English: B2, professional working proficiency, certified on the EF SET in August 2026 (cert.efset.org/9QEwRt). I hold hour-long client meetings in English.

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