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Abel Lavieri

@abellavieri

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Fullstack developer specialized in Ruby on Rails, Angular, NodeJS, React, Python and Golang.

Venezuela

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What I'm looking for

Looking for a long term professional relationship with companies that develop challenging solutions

I’m a full-stack developer with 3+ years of experience building high-quality, performant, production-ready web applications. I focus on database optimization, clean architecture, and delivering features that improve both user experience and system performance.

In my recent work, I boosted invoicing response time by 15% through database query optimization and service objects that abstract query logic. I also enhanced the user experience by generating invoices in PDF format, and I improved project on boarding by accelerating scaffolding of new projects by 35% using templates for Java Spring Boot and Angular applications.

I’m highly collaborative and detail-oriented, with strong habits around code reviews and remote pair programming. I’ve also led security improvements by adopting secret vaults organization-wide, and I’ve worked on LLM-related quality by reviewing generated code, restructuring SQL for better future outputs, and evaluating prompt adherence.

Experience

Work history, roles, and key accomplishments

Full-stack Developer

Cleteci

May 2025 - Nov 2025 (6 months)

Boosted the invoicing module response time by 15% by optimizing database queries and introducing service objects. Improved invoicing UX with PDF generation services, accelerated project scaffolding by 35% using Java Spring Boot and Angular templates, and led secret-vault adoption to reduce credential security risks.

Ruby on Rails PostgreSQL ActiveRecord Service Objects Query Optimization Angular Java Spring Boot Secret Management & Security

Full-stack Developer

Outlier

Aug 2024 - Jun 2025 (10 months)

Reviewed LLM-generated code quality, correcting critical errors and improving the reliability of the produced output. Restructured LLM SQL queries to reduce unnecessary joins and intermediate tables, and assessed prompt adherence by evaluating how closely responses matched prompt parameters.

SQL Query Optimization Prompt Evaluation PostgreSQL Code Quality Assurance Intermediate Table Reduction Ruby on Rails

Full-stack Developer

Dacosi

Feb 2025 - May 2025 (3 months)

Reduced the Dacomed application response time by 80% by optimizing backend request volume and implementing custom client state management. Restructured the web app database to reduce data redundancy by 40% by eliminating repeated tables.

State Management Database Restructuring SQL Performance Optimization Data Normalization Django Django REST Framework Next.js

Full-stack Developer

Cleteci

Mar 2022 - Nov 2023 (1 year 8 months)

Improved the Trips module response time by 30% by optimizing ActiveRecord ORM queries and decluttering serializers. Delivered the agents’ commissions reconciliation MVP one sprint early, sped up trip creation by 15% using a flight auto-completion feature with a third-party flight tracking API, and reviewed LLM responses to improve code quality.

Ruby on Rails ActiveRecord Serialization Performance Tuning API Integration Third Party Flight Tracking API

Web Development Mentor

Microverse

Mar 2021 - Mar 2022 (1 year)

Mentored integration of authentication solutions across the React frontend and Ruby on Rails backend, reducing development time by 20%. Guided adoption of a headless architecture to reduce integration conflicts and enable a 20% faster development process and on-time MVP delivery.

React Ruby on Rails Authentication Git Github Mentorship

Education

Degrees, certifications, and relevant coursework

Microverse

Full Stack Web Development Program, Full Stack Web Development

2019 - 2023

Activities and societies: 1300+ hours; remote pair programming; Git/GitHub; Gitflow; daily standups; projects with Ruby/Rails/JS/React/Redux.

Completed a Remote Full Stack Web Development Program (full-time), building projects with Ruby on Rails, JavaScript, React, and Redux while mastering algorithms and data structures. Developed skills in remote pair programming and collaboration using Git/GitHub and Gitflow.

Universidad Central de Venezuela

Bachelor of Science, Computer Science

2010 - 2016

Pursued a Bachelor’s degree in Computer Science, with studies currently on hold. Covered foundational computer science coursework over the 2010–2016 period.