Software Engineer | Full-Stack, Cloud & AI Agentic Systems

I Transform Business Problems into AI Solutions

Full-stack & AI Agentic Systems engineer. I architect scalable SaaS platforms and AI-driven data frameworks with Python, FastAPI, AWS and Anthropic models that generate measurable business impact.

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Julián Andrés Restrepo
Open to opportunities

About me

My passion for solving complex business problems

Julián Andrés Restrepo Castaño

Results-driven Software Engineer with hands-on expertise building scalable cloud architectures, full-stack web applications, enterprise SaaS solutions, and Agentic AI systems.

At Kidar, I architected core SaaS platforms (ERP and Time Management) that reduced operational friction, saved $18,000 USD annually, and accelerated project management workflows by 20%.

As Lead Software Engineer at Scala / DataCrédito Experian, I designed a core AI Data Ingestion Framework that reduced overall development and QA cycles by over 50%.

Deep expertise in Python (FastAPI), Java (Spring Boot), React, AWS Cloud infrastructure, and modern AI Development Lifecycles (AI-DLC).

Full-stack engineer capable of owning problems end-to-end: backend, frontend, cloud infrastructure, and AI system design.

Skills & Tech Stack

Tools and technologies I master

Primary Languages & Frameworks

  • Python (FastAPI)
  • Java (Spring Boot)
  • React.js
  • MySQL

Secondary Languages & Tools

  • Node.js
  • TypeScript
  • JavaScript
  • MongoDB

Cloud & DevOps (AWS)

  • S3, EKS, ECS
  • Aurora DB, Bedrock
  • Lambda, EC2, API Gateway
  • VPC, Docker, CI/CD

AI & Agentic Systems

  • Agentic System Design
  • RAGs & Vector Databases
  • Anthropic Models, LiteLLM
  • AI-DLC, ML & DL Fundamentals

Domain & Theoretical Knowledge

  • Information Security Systems
  • Big Data Engineering
  • Project Management

Methodologies

Clean Architecture

Spec-Driven Development (SDD)

Test-Driven Development (TDD)

Behavior-Driven Development (BDD)

Domain-Driven Design (DDD)

Experience

My professional journey

Lead / Principal Software Engineer • Scala / DataCrédito Experian (2026 – Present)

Core AI Data Ingestion Framework

Core AI Ingestion Framework: Spearheaded as Principal Software Engineer the architecture and development of an AI-driven Data Ingestion Framework for Scala (the foundational data backbone of Experian), decreasing Data Engineering development and QA lead time by over 50%.

Credit Interface Personalization Chatbot: Co-designed and engineered an interactive AI chatbot integrated into Experian / DataCrédito platforms to deliver personalized credit interfaces and user experiences.

Enterprise AI Integration: Designed scalable, secure AI pipeline interfaces ensuring robust security standards and compliance within large-scale financial data ingestion processes.

Software Engineer • Kidar (April 2026 – Present)

Core SaaS Platforms & Enterprise Architecture

Core SaaS Architecture & Cost Optimization: Built from the ground up two core internal SaaS platforms (ERP & Time Manager) utilizing Python (FastAPI), MySQL, and AWS, saving $18,000 USD/year and cutting project management cycle times by 20%.

Enterprise Data Workflows: Streamlined company-wide data architecture and internal information pipelines, driving cross-functional synchronization and operational efficiency.

Legacy Refactoring & Quality: Refactored over 20,000 lines of legacy code to Clean Architecture within 3 weeks, reducing ongoing feature development time by 40%.

Serverless AI Proof of Concept: Designed and deployed a serverless PoC using AWS Lambda and Bedrock AgentCore, accelerating team technical exploration by 2 weeks.

Featured Projects

Work that demonstrates my expertise

Adkio

Adkio

Automated advertising campaign orchestrator converting natural language specifications into multi-channel marketing campaigns (Meta, TikTok, Google Ads) using Anthropic AI agents behind a REST API, with human approval before publishing.

Python FastAPI React TypeScript Anthropic Docker
Kidar ERP

ERP Kidar

Enterprise system built with clean architecture, AWS integration, and agentic flows for process automation.

Python AWS React Bedrock
Jojun

Jojun

P2P clipboard for the terminal: two laptops join the same room, one sends a snippet and the other receives it. No Discord, USB, or server.

Bare Pear Hyperswarm JavaScript
Argenta Health Care

Argenta Health Care

Institutional hospital demo. The UI looks like a real product: services home, doctor directory, locations, scheduling, patient portal, payments, telemedicine, ES/EN, and accessibility controls. Built with Vite and mock data — no clinical backend.

Vite JavaScript CSS Cloudflare

Education & Certifications

Academic background and professional certifications

Education

  • B.S. in Systems Engineering
    Universidad EAN — 6th Semester, In Progress
    Bogotá, Colombia
  • Technical Degree in Software Programming
    Completed

Certifications

  • AWS Knowledge: AI-DLC Foundations — Amazon Web Services
  • Full-Stack Engineering with JavaScript — CodeSignal
  • AWS Cloud Foundations — Amazon Web Services

Languages

  • English — Professional / Advanced (C1/B2)
  • Spanish — Native Speaker

Let's Talk

I am available for opportunities, technical consultations and collaborations in AI, backend and cloud architecture.