Looking for a job

Heriberto Ramirez Castellanos

@heribertoramirezcast

Message

I build high-volume transactional databases and lead critical backend delivery.

United States

Message

What I'm looking for

I'm looking to lead or contribute to critical backend and database initiatives, especially high-volume transactional platforms where I can improve performance, reliability, migrations, and delivery outcomes.

I've built and optimized transactional database architectures for ARRA IN S.A.S. clients processing more than 1 million transactions a day, protecting availability and operational performance.

I lead end-to-end software projects, from planning through client delivery, and have managed multidisciplinary teams of up to eight developers. I also step in during production outages and failed deployments to help maintain business continuity.

At CONEXRED S.A.S. (Puntored), I managed implementations and operational continuity for a payments, collections, and service-payment platform. I improved high-load PostgreSQL and MySQL data models and contributed to the Sales Portal and Administrative Platform.

As a co-founder of INVERED S.A.S., I designed web-based management, control, and audit systems and built PHP backends backed by PostgreSQL, Oracle, and MySQL. My work spans database migrations, legacy refactoring, PL/pgSQL development, and transactional business models using PHP and Node.js.

Experience

Work history, roles, and key accomplishments

Database Developer & Technical Project Manager

ARRA IN S.A.S.

Jan 2017 - Apr 2026 (9 years 3 months)

Led architecture and optimization of PostgreSQL data models for clients with over 1M daily transactions, ensuring availability and performance. Managed end-to-end development projects, leading teams of up to 8 developers and implementing PL/pgSQL functions, views, indexes, triggers, and stored procedures.

PostgreSQL PL PgSQL PHP NodeJS Database Architecture Performance Optimization Project Management Agile Scrum Kanban Gitlab Jira Trello

Technical Project Manager & Database Developer

CONEXRED S.A.S. (Puntored)

Jan 2016 - Dec 2017 (1 year 11 months)

Directed planning and management of projects for new implementations and operational continuity of the Puntored transactional platform. Supervised development and optimization of PostgreSQL and MySQL data models, coordinating teams of up to 5 people per work cell.

PostgreSQL MySQL Database Optimization Project Management Team Coordination Transactional Systems

Socio Fundador · Backend Developer & Database Architect

INVERED S.A.S.

Jan 2008 - Dec 2016 (8 years 11 months)

Co-founded the company and led design, analysis, and development of information systems for management, administration, control, and auditing in web environments. Implemented transactional data models in PostgreSQL, Oracle, and MySQL, and developed PHP backends for administrative and auditing applications.

PostgreSQL Oracle MySQL PHP Backend Development Database Architecture Web Development Project Management