Omar Villasana

Full Stack Developer with over 5 years of hands-on experience delivering production-grade applications across diverse environments from fast-moving outsourcing teams to enterprise-scale platforms. Proficient in building microfrontend architectures using React and Angular, and developing robust backend services with Node.js, Express, NestJS, Django, and Flask. Solid foundation in PostgreSQL, MySQL, and MongoDB, with a strong grasp of real-world debugging, CI/CD pipelines, and Agile delivery.

Skilled at owning full-stack features across the board from frontend rendering logic and API design to AWS-integrated backend flows and database performance tuning. Experienced in working with complex systems like Salesforce APIs, syncing workflows, and resolving edge-case bugs in production environments. Strong communicator in async and live setups, with a deep habit of writing clean, maintainable code in collaborative remote teams.

Full Stack Developer at Zayo Group (2023-05 – 2025-09)

• Built Microfrontend apps using React and Angular, with feature-specific deployments like quotes, stage management, and contact mapping, all wired to a shared Node.js backend.
• Debugged complex data flow issues between frontend and backend. Particularly around quote rendering logic, opportunity-stage mapping, and edge-case fallbacks for deleted quote states.
• Wrote and maintained API routes in Node.js to serve dynamic frontend needs like fetching the latest quote metadata, saving state rollbacks, tracking user actions, using PostgreSQL to persist interactions, and syncing history.
• Worked with and around Salesforce APIs as a data source, fetching quote and opportunity metadata, and handling inconsistencies in field formats and update behaviors.
• Investigated real-time bugs such as quote not showing after stage change, opportunity stuck in review due to backend mismatch, and ghost records in the UI due to missing IDs, and fixed them across stack layers.
• Integrated with internal AWS services, including reading/writing structured data from S3, invoking Lambda functions during quote lifecycle events, and working within AWS-authenticated environments.
• Maintained clean commit flow using GitLab, with tight feedback cycles via Merge Requests, code reviews, and multiple hotfix pushes per week across microservice repos.
• Participated in Agile ceremonies including daily standups, sprint planning, retros, and async updates, delivering incrementally and collaborating closely with product and QA teams.
• Collaborated asynchronously and live via Jira, Google Chat, and Zoom, regularly clarifying spec details, sync logic, and expected UX behaviors with senior engineers.
• Documented edge-case behaviors and rollback flows in Confluence, especially for internal testers to follow during sandbox QA.
• Used test environments to manually verify quote sync behavior across frontends after staging deploys, often finding and reporting bugs before UAT caught them.
• Shipped multiple full-stack features under tight iteration loops, shipping quote retractions logic, sync confirmation UI, and fallback re-render mechanisms that unblocked business-critical quoting flows.

Full Stack Developer at Glorium Technologies (2022-05 – 2023-05)

• Delivered full-stack features across multiple client projects using React, Angular, Vue.js, and Svelte on the frontend, and Node.js, Express, and NestJS on the backend.
• Built backend APIs using both JavaScript and Python, including services built with Django and Flask for clients needing rapid backend scaffolding and admin tools.
• Designed and consumed REST and GraphQL APIs, handling auth, validation, and error reporting across client integrations.
• Worked with PostgreSQL, MySQL, and MongoDB to design schemas, write performant queries, and manage migrations.
• Used Docker for local dev and cloud deployment, and automated test/build pipelines using GitHub Actions and GitLab CI/CD.
• Wrote integration and unit tests with Jest, Cypress, and PyTest, depending on the stack and project scope.
• Shipped features and fixed bugs across projects hosted in AWS, Azure, and GCP, adapting to each client's infra and deployment tooling.
• Participated in Agile sprints, async check-ins, and daily standups using Jira, Slack, and ClickUp, collaborating with cross-timezone teams.
• Balanced multiple client demands, switching between stacks (JS/Python, SQL/NoSQL) and delivering consistent, working code under tight delivery windows.
• Maintained and improved shared codebases with clean Git workflows, modular components, and reusable backend utilities.

Internship at Glorium Technologies (2021-05 – 2022-05)

• Contributed to frontend tasks using React, Vue, and Svelte, implementing components, routing logic, and small bug fixes.
• Shadowed senior developers across backend work in Node.js, Flask, and Django, learning API structure, middleware patterns, and how ORMs interact with relational DBs.
• Practiced writing and testing simple REST endpoints using both JavaScript and Python stacks.
• Gained exposure to test tooling, including Jest, PyTest, and browser-based testing workflows.
• Attended Agile ceremonies, learned sprint workflows, and contributed to internal docs and test plans using Notion.
• Used Docker to run and debug multi-service projects locally in development.
• Committed regularly to Git repos and participated in PR reviews for code cleanup, formatting, and bug triage.
• Gradually took ownership of low-risk feature tasks under mentorship and contributed to successful client deliveries.

Bachelor of Technology in Computer Science – Nova Southeastern University (2017-08 – 2021-05)