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Isai Cespedes

Open to work4 years experience

Frontend Engineer

Remote-first (CET / UTC-4 flexible)Target Roles: Backend Engineer • Full-Stack Developer • Frontend Specialist

Frontend Engineer · TypeScript & React Specialist

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Standing Rank

Rank Not Available

Developer Badges

Badges Pending

Skills & Technologies

40 skills
typescriptjavascripthtml5css3reactnext.jszustandreduxtailwind csslitssr/ssgcomponent architecturenode.jsgraphqlrest apisruby on railspostgresqlmysqlphpjestreact testing libraryplaywrighttype-safe developmenteslintbiomeprettierpre-commit hooksgitgithubci/cdautomation scriptingspecification-driven developmentmulti-agent development workflowsai-assisted code review & security validationautomated documentation & knowledge managementstructured project context (obsidian)claude codegithub copilotgeminicodex

Work Experience

Full Stack Software Developer

Stack Builders

Jan 2024 - Present
  • Architected and led a full frontend migration from a legacy CMS to a modern web platform — reducing page load time by 35% and cutting long-term maintenance cost across the codebase.
  • Eliminated 4,000+ TypeScript errors in a large production codebase by introducing stricter typing standards, reducing runtime bugs and giving the team significantly higher confidence in refactors.
  • Automated a 200+ page markdown migration pipeline with custom syntax validation — saving 50+ hours of manual engineering work per project.
  • Established frontend standards (ESLint, Biome, pre-commit hooks, PR templates) adopted across multiple projects — cutting onboarding time by ~50% and time-to-first-delivery by ~70%.
  • Built specification-driven, multi-agent development and review workflows — accelerating delivery while maintaining strict TypeScript, CI, and test coverage standards.

Full Stack Software Developer

Pylon Data

Oct 2022 - Feb 2023
  • Built and shipped client-facing features for a solar panel estimation and reporting platform — improving reporting accuracy for utility providers under tight delivery deadlines.
  • Delivered custom client solutions that directly impacted the reliability of solar energy estimations used by real infrastructure operators.

Peer Technical Mentor

Microverse

Jan 2022 - Oct 2023
  • Mentored 200+ junior developers through structured code reviews, debugging sessions, and engineering best practices — with several mentees transitioning into full-time development roles.
  • Maintained consistent review quality across an international cohort, building a track record of clear, actionable feedback that accelerated mentee progress.

Projects

Projects Not Populated

Personal applications, open-source work, and code repos will show here.

Leaderboard Standings

Leaderboard Position Pending

Global test scores, peer standing percentiles, and algorithm leaderboard ranks are updated dynamically.

Assessment Highlights

Assessments Not Completed

Coding evaluations, system assessment results, and conceptual score badges will appear here after taking a test.

AI Collaboration Score

AI Collaboration Score Pending

Developer coding behavior, assistant cooperation, and AI pair-programming indicators are evaluated during live coding sessions.

Role Compatibility Profile

Role Compatibility Analysis Pending

Custom matching reports, candidate role compatibility percentiles, and core engineer strength profiles are processed once conceptual code screenings are complete.

Achievements

Achievements Not Earned

Special rewards, developer badges, system recognition certificates, and conceptual milestones will display here.

About Details

Professional Bio

Frontend-leaning Full Stack Engineer with 4+ years of experience delivering production TypeScript and React/Next.js applications for international SaaS products. Specialized in frontend architecture, developer experience, and AI-augmented engineering workflows.

Full Stack Web Development

Microverse ( - 2022)

Languages: English, Hindi
Email: Locked