Roman Meclazcke presenting a product at Platanus

Hi, I'm

Roman
Meclazcke

Backend & IA Engineer

Backend and IA engineer with 3+ years building backends, RAG systems, and agents that reach production. I won the PlatanusHack public vote, maintain a Draw.io skill used by thousands of people, and share what I learn with a community of 16K+ developers.

Based in
Tandil, Argentina
Experience
3+ years in software
Community
16K+ dev audience
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Experience

Work experience.

Professional background across companies and independent projects, with roles in backend development, automation, and applied AI development.

Index

2025

Jan. 2025 - Present

Tandil, AR

Employment

Current

TwinSF

Backend & IA Engineer

Backend & AI Engineer

Present

Designed and built an end-to-end phone calling system for AI agents, integrating telephony, real-time speech transcription and synthesis, guardrails, and per-call observability. Also built Mission Control for agent operations and monitoring, developed agents for support, sales, QA, and marketing, and implemented RAG systems with LlamaIndex.

Backend Developer

Initial phase

Participated in the migration of legacy Oracle Forms applications to modern Spring Boot architectures, delivering a scalable transition for management systems used by public institutions. Worked across the full project cycle: requirements gathering, analysis, time estimation, and delivery. Designated as the responsible for onboarding new developers to the team.

2024

Jul. 2024 - Dec. 2024

Tandil, AR

Freelance

Freelance

Backend Developer

  • Owned the full cycle: requirements gathering, analysis, design, development, and deployment of an automation system for a hair salon.
  • The solution let the client focus on core revenue-generating activities. Currently in production.

2023

Dec. 2023 - Sep. 2024

Tandil, AR

Employment

Vopper

Backend Developer

  • Contributed to the backend development for the business logic of a logistics management platform. Worked with databases, performance optimization through caching, requirements analysis, and new features. Also worked with people from different areas to understand what they needed and implement improvements to the system.
  • The project centralized key processes for a supplier company: transport and route planning, per-store product dispatch, cash and account receivables management, and vehicle maintenance alerts. The solution helped organize daily operations, improve the follow-up of each process, and provide clearer information to respond to incidents.

2023

2023 - 2025

Tandil, AR

Education

UNICEN

University Technical Degree in Application Development

  • National University of the Center of Buenos Aires Province.

Projects

Selected work.

Products, tools, and technical builds where I worked on backend, AI, and real implementation.

1 / 5

Own product

FitVision

AI-powered virtual try-on platform for fashion ecommerce. Built, deployed, and operated independently.

Built solution

Built and deployed a complete product: an AI virtual try-on experience, a payment journey, and the services needed to operate the flow from the interface through the backend.

View demo
View all repositories on GitHub

Stack

Technologies and tools I work with.

Tools I use to build production agents, backends, and systems that reach real users.

  • Java
  • Python
  • TypeScript
  • JavaScript
  • PHP
  • Node.js
  • Spring Boot
  • Spring Security
  • FastAPI
  • NestJS
  • Express
  • LangChain
  • LlamaIndex
  • OpenClaw
  • Hermes
  • MySQL
  • PostgreSQL
  • MongoDB
  • Oracle
  • Qdrant
  • Redis
  • Hibernate
  • Sequelize
  • Prisma
  • TypeORM
  • Google Cloud
  • Google Cloud VMs
  • AWS (EC2, S3, RDS, IAM)
  • Vercel
  • Docker
  • GitHub Actions
  • CI/CD
  • Hexagonal architecture
  • Event-driven architecture
  • Microservices
  • RAG
  • AI agents
  • Agent orchestration
  • Guardrails
  • Agent evaluation
  • Agent operations
  • Agent observability
  • External tool integration
  • Vector Search
  • Image processing
  • WebSockets
  • Kafka

Articles

Articles.

When a project leaves me something worth telling, I write it down: what worked, what didn't, and why.

Want to talk?

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