Hi, I'm Alejo Rostata
Full Stack Software Engineer & Team Lead
Software Development
Web, Mobile & APIs
Seasoned Full Stack Software Engineer & Team Lead with nearly a decade of experience architecting and delivering web and mobile systems. Proven leader driving engineering team performance (KPIs & PAF) while delivering modern scalable applications.
// Software Engineering Lead Overview
Primary Role
Full Stack Software Engineering & Team Lead @ Kryterion
Core Specialization
Java (Spring Boot), Next.js, Vue.js, Supabase, Flutter, React Native
Engineering Leadership
Driving Team Velocity, KPIs & Performance Appraisal Frameworks
Work Experience & Technical Leadership
Nearly a decade of progression from system development to full-stack engineering and team leadership across international and enterprise environments.
Software Engineering Team Lead
Kryterion, Inc. (Webassessor Platform)"Architecting and leading multi-tenant enterprise SaaS applications while providing technical oversight and sprint governance in Jira for 20 Software Engineers across 4 cross-functional sub-teams."
Key Responsibilities & Achievements
- Architect and lead development of multi-tenant enterprise SaaS applications using Java (Spring Boot), TypeScript, Next.js, Vue.js, and SQL databases.
- Provide technical oversight and sprint governance in Jira for 20 Software Engineers across 4 cross-functional sub-teams.
- Accelerate engineering delivery and code review standards by integrating AI-assisted developer tooling (GitHub Copilot, Claude Code AI, Gemini).
- Maintain active coding velocity delivering 8+ story points per sprint, focusing on core RESTful APIs, secure business logic, and system stability.
- Oversee site performance optimization and Web Accessibility (a11y / WCAG) compliance audits using Chrome DevTools & Lighthouse.
- Coordinate deployment pipelines, code freezes, and production rollouts with Release Managers and DevOps teams across QA, UAT, and production.
- Mentor engineers through scheduled 1-on-1 sessions, KPI performance evaluations (PAFs), and technical career growth roadmaps.
Technologies & Tools
Skills, Languages & Frameworks
Comprehensive skill set built across backend APIs, modern frontend web apps, mobile, AI tools, Supabase, and engineering leadership.
Backend & Frameworks
Frontend & Mobile
Databases, Cloud & DevOps
Integrations & Tooling
Leadership & Governance
Projects & Systems I've Built
A showcase of SaaS products, mobile apps, and enterprise systems I've architected, built, or currently maintain.
QAPione — Automated Quality Assurance Platform
Cloud-native automated software testing and QA workflow manager.
Architectural & Engineering Highlights
- Multi-tenant SaaS with Supabase PostgreSQL, Stripe payments, and Row Level Security.
- Automated test suite execution, real-time result dashboards, and Vercel cloud hosting.
Stelifo — SaaS & B2B Web & Mobile Platform
Digital transformation SaaS platform featuring web and mobile apps for automated business workflows.
Architectural & Engineering Highlights
- Web application platform and cross-platform mobile app built with React Native.
- Integrated Stripe subscription payments, Resend.com transactional emails, and Vercel hosting.
Vibe AI — Intelligent Workspace Assistant
AI-driven content and productivity engine powered by generative AI models.
Architectural & Engineering Highlights
- Integrated LLM API streams for prompt generation and code refactoring.
- Deployed on Vercel with high-performance Next.js App Router architecture.
Webassessor — Kryterion Online Assessment Platform
High-concurrency global exam proctoring and test delivery platform serving thousands of candidates simultaneously.
Architectural & Engineering Highlights
- Scaled core assessment delivery engine with high-concurrency exam session state.
- Engineered multi-language internationalization (i18n) and dynamic localization engine supporting seamless language switching for global test candidates.
- Engineered responsive web interfaces using Vue.js, Bootstrap, and Tailwind CSS with WCAG accessibility standards.
Education, ACM-ICPC & Achievements
Rooted in strong computer science fundamentals, continuous graduate education, and competitive algorithmic problem-solving.
Formal Education
Master of Science in Information Technology (MS IT)
Ateneo de Naga University
System Development & Advanced Enterprise Architecture.
Bachelor of Science in Information Technology (BS IT)
Partido State University
Graduated with strong foundations in Computer Science, Data Structures, and Algorithmic Programming. Contestant in ACM-ICPC 2014.
Honors & Competitions
ACM-ICPC Philippine National Contestant
2014ACM International Collegiate Programming Contest
Selected as a national contestant representing Partido State University in the prestigious ACM-ICPC algorithmic programming competition.
Engineering Team Lead Promotion
2024Kryterion, Inc.
Promoted to lead full-stack engineering team for the Webassessor platform, managing architecture, team KPIs, and PAF reviews.
Get In Touch
Whether you are looking for a full stack software engineer, technical lead, or consulting partner, feel free to connect directly via Email or Viber.