Jay Kim
Open to contract and full-time roles(Toronto · Remote-friendly)Let's talk

Experience

Selected engagements across product, platform, and banking.

01
Independent Web Developer
SERVITHEtobicoke, ON (Remote)Oct 2024 - Present

Partnering with founders across North America to ship marketing sites, portals, and Supabase-powered apps.

  • Built App-Router Next.js 15 sites with TypeScript + Tailwind, keeping Lighthouse scores at 95+ and FCP < 1s.
  • Created Supabase-backed client/admin portal with RBAC/RLS, signed uploads, and inquiry → quote automation.
  • Integrated next-intl SEO, GA4, chat, and consent flows while reducing ops spend ~30% via managed services.
  • Monitored messaging using AWS SES/SNS/CloudWatch/Lambda for bounce/complaint tracking.
Next.jsReactTypeScriptTailwind CSSSupabasePostgreSQLAWS

Delivered commerce, chatbot, and dashboard products for enterprise clients across Spring Boot, React, and OCC.

  • Owned 8+ launches covering Next.js SSR/ISR storefronts, Spring Boot APIs, and Express.js services.
  • Raised Java unit test coverage from 45% to 82% using JUnit/Mockito and hardened CodeCommit pipelines.
  • Migrated REST APIs to Express.js cutting CPU usage 33% and enabling 30% AWS compute savings.
  • Implemented PLP/PDP/RFQ experiences and ISR builds with <200 ms TTFB plus JSON-LD SEO automation.
Spring BootReactNext.jsNode.jsExpress.jsSCSSOracle Commerce CloudAWSKafkaRabbitMQ

Built self-initiated full-stack products with React/Next.js and Spring Boot, deployed on AWS/Docker.

  • Launched dashboards, authentication, and email workflows using React, Next.js, and Spring Boot.
  • Managed Docker/Jenkins/PM2 pipelines on AWS EC2 while handling infra, DNS, and SSL.
  • Designed responsive UIs with Ant Design, Styled Components, and Bootstrap themes.
  • Optimized bundles/Core Web Vitals to lift organic traffic by 35% via SEO + Webpack tuning.
ReactNext.jsSpring BootAnt DesignStyled ComponentsAWS EC2DockerJenkins

Modernized large-scale banking systems (Withholding Tax, Transaction Management) across Java, React, and Tibero.

  • Led 1 TB Oracle → Tibero migration and automated 6 tax workflows with zero compliance violations.
  • Digitized 28M transaction records, saving CAD 1.1M/year and running 99.9% ETL success.
  • Refactored JSP modules to React and optimized SQL across EasyBuilder → MyBuilder migrations.
  • Delivered DB-to-DB sync, electronic approvals, and private-cloud deployments as system admin.
JavaSpringReactJSPOracleTiberoUnixETL

Delivered enterprise groupware for 2,000+ employees, covering auth, collaboration, and CI/CD automation.

  • Implemented login, document sharing, bulletin boards, and attendance modules using Spring, JSP, and jQuery.
  • Set up Jenkins CI/CD pipelines that converted weekly FTP deployments into daily automated releases.
  • Partnered with stakeholders to translate requirements into functional modules and coordinated UAT.
SpringJSPjQueryMariaDBJenkinsTomcatCentOSSVN

Built and maintained enterprise security consoles (UAC, USL, SecuMS) deployed across 10+ organizations.

  • Developed Java/Struts2 admin dashboards and a memory-efficient 1 GB log viewer for forensic workflows.
  • Shipped role-based access control, session logging, and vulnerability assessment modules.
  • Collaborated with QA and client IT teams to deliver secure, stable releases in regulated environments.
JavaStruts2JSPjQueryMSSQLTomcatWindows ServerSVN