Available for Remote Work

Jose Andres Sandoval Jimenez

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Building high-performance backend systems that scale to millions. Specialized in financial-grade APIs, event-driven microservices, and AI agent pipelines that ship to production.

Colombia  ·  Open to Remote Worldwide
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Who I Am

Crafting Scalable Systems
at Financial Scale

I'm a Senior Backend Engineer with 5+ years designing systems that don't break when it matters most. Currently architecting infrastructure at Seguros Bolívar — Colombia's largest insurance group — maintaining a platform that serves 3 million+ customers.

My work lives at the intersection of reliability and scale: migrating monoliths to microservices, cutting API latency 20–30%, and building event-driven pipelines with AWS SQS that process millions of financial transactions daily.

Recently I've expanded into AI engineering — building LLM-powered agents, RAG pipelines, and integrating the Claude API into production workflows. I believe the next decade of backend is building the infrastructure that makes AI reliable at scale.

3M+
Customers Served
1K+
APIs Maintained
30%
Performance Gain
5+
Years Building
Where I've Been

Work Experience

Mar 2022 — Present
Seguros Bolívar
Senior Backend Engineer  ·  Bogotá, Colombia
Maintained and evolved 1,000+ APIs and Lambda functions powering a financial platform for 3M+ customers. Led legacy-to-microservices migration, slashing API response times by 20–30% through architectural refactoring and strategic caching. Applied DDD patterns across critical business domains and architected event-driven pipelines over AWS SQS.
Node.jsTypeScript Spring BootPython AWS LambdaSQS AWS CloudTerraform CI/CDReact DDDMicroservices
Jun 2021 — Feb 2022
DanielApps
Backend Developer
Engineered backend services using clean architecture principles in Node.js. Delivered multiple production services focused on maintainability, testability, and long-term extensibility.
Node.jsClean Architecture REST APIsPostgreSQL MongoDBAWS Cloud
Jan 2021 — Jun 2021
Smartenit
Backend Developer  ·  Remote · California, USA
Built resilient backend systems for a US-based IoT company. Reduced system downtime 40% through improved error handling, circuit-breaker patterns, and cross-language service hardening across Java, Python, and Node.js.
JavaPython Node.jsIoT
Jan 2020 — Dec 2020
Universidad del Norte
Full Stack Developer  ·  Barranquilla, Colombia
Developed internal systems for one of Colombia's top-ranked universities. Improved overall system efficiency by 25% through database optimizations and full-stack refactoring.
Node.jsPostgreSQL Full Stack
What I've Built

Featured Projects

Project One
Add your first featured project here — a microservices system, an API gateway, or any production backend you're proud of.
Node.jsTypeScript AWSPostgreSQL
Project Two
Showcase a Python/FastAPI service, a data pipeline, or a serverless architecture you designed from scratch.
PythonFastAPI DockerRedis
AI Agent Project
Feature an LLM-powered agent, RAG pipeline, or Claude API integration — the AI work that separates you from the pack.
Claude APIRAG LangChainNestJS
What I Use

Technical Skills

Backend
Node.jsTypeScript PythonFastAPI NestJSExpress JavaREST APIs DDDMicroservices Clean Architecture
Cloud & DevOps
AWS LambdaAWS SQS AWS EC2AWS S3 DockerTerraform GitHub ActionsJenkins CI/CDServerless Datadog
Databases
PostgreSQLMongoDB DynamoDBRedis MySQLElasticSearch
AI & Agents
Claude APILLM Integration RAG PipelinesLangChain EmbeddingsAI Agents Prompt Eng.
Get In Touch

Let's Build Something
Remarkable

Whether you're scaling a fintech platform, building AI-native products, or looking for a senior backend engineer who ships — I'm open to the conversation.