Hartanto Thio
Developer
© 2026 All rights reserved.
Resume
Experience
2025 - Present
VantaSenior Software Engineer
- Participate in engineering on-call rotation, triaging and resolving production alerts and incidents using Datadog monitoring and alerting to maintain system reliability
- Leading design and implementation of Personal Setup Wizard project, a guided onboarding system that streamlines customers setup of their personnel hub, from creating engineering specs, sequencing tasks, and driving implementation
- Serves as the frontend lead for the team, partnering with design system and frontend platform teams to align patterns, UI standards, and implementation across products
- Initiated and led multiple improvements across UX and frontend performance, identifying opportunities to enhance the product
- Delivered improvements to security training product, enabling customers to use Vanta's built-in training along with third-party integrations, removing prior product limitations
2024 - 2025
RipplingSenior Frontend Engineer
- Led the rollout of a new Content Management System (CMS) agnostic architecture, replacing a WordPress-coupled implementation
- Engineered the Datadog and Sentry integrations to establish real-time metrics, dashboards, and alerting, enabling proactive detection of website issues
- Performed technical Search Engine Optimization (SEO) audits and implemented best practices metadata enhancement, site speed optimization, hreflang tag — resulted in improved search engine visibility and ranking for international sites
- Executed the migration of the WordPress instance to a larger instance to address downtimes caused by growing traffic demands, resulting in improved site performance and zero downtime since the transition
- Developed documentations for on-call duty ensuring clarity and consistency in incident response procedures
- Established release management processes to streamline deployment and improved visibility of changes for stakeholders
2022 - Present
Zip (ziphq.com)Senior Software Engineer
- Collaborated closely with engineers, designers, and product managers from scoping feature requests to production release
- Led UI and performance improvements across payment pages by adopting modern shared components and optimizing frontend performance
- Improved invoice attachment processing by enabling support for multiple files and formats per invoice, replacing the previous single-email/single-file limitation and improving flexibility for supporting documentation
- Participated in engineering on-call rotation, ensuring product stability and assisted customer support team with issue resolution
- Contributed to the broader frontend organization by mentoring non-frontend engineers, hosting office hours, documented best practices, and modernizing the shared core library
2019 - 2022
ConfluentStaff Frontend Developer / Tech Lead
- Managed the corporate website, confluent.io, and Confluent Developer hub, developer.confluent.io; also provided support for multiple web properties, including but not limited to Apache Kafka official website and Kafka Tutorials (merged with Confluent Developer)
- As the first frontend hire in the team, helped scale the team to 6 frontend developers and established engineering culture
- Spearheaded the tech stack migration from a monolithic WordPress application to a Single Page Application (SPA) using the Gatsby, a React-based framework, leading to an over 45% improvement in page load time
- Supported the brand redesign project by revamping website with new typography, logo, color schemes, and full redesigns on key landing pages, leading up to the company’s Initial Public Offering (IPO)
- Implemented and maintained fully automated CI/CD pipeline for code deployment using Netlify and Semaphore
- Integrated WebPageTest performance test and reporting in pull-request build, focusing on Core Web Vital and Lighthouse scores
- Implemented unit, snapshot, and end-to-end testings using Jest and Cypress
- Provided ongoing support to marketers on proper implementation of A/B testing
- Evaluated, prototyped, and migrated existing content to a new Content Management System, Contentful; and led the adoption effort by conducting training with various stakeholders
- Created high-level designs and documents around CI/CD system, on-call duty, release process, and onboarding documents
- Collaborated closely with cross-functional teams in marketing, from design, product marketing, growth, and data science teams, on initiatives focusing on growing the cloud business through A/B testing and improving data reporting
2017 - 2019
Yahoo SearchSoftware Engineer
- Spearheaded the development of SPA, used internally by engineers, editorial, and product to build search experiences end-to-end; from setting up backend data sources to the rendering of the component itself
- Improved the efficiency of creating new search experience by over 50%, which led to faster turnaround time
- Implemented and enhanced the SPA codebase to allow internal users to create rule-based triggering configurations
- Collaborated with cross-functional teams to work on various experimentations focusing on growing users and improving UX
- Supported our customers and continuously engaged in a feedback loop process where we collect, prioritize, and address feedbacks to further improve their experience in using the application
2016 - 2017
BeepiSenior Frontend Developer
- Contributed to site refresh, collaborated with design, as well as tech stack migration, from .NET + Angular to Node.js + React
- Contributed to the implementation of new API, focusing on improving page load time
- Trained other engineers to build features with React/Redux
- Implemented reusable/customizable components that are used across website
2013 - 2016
Yahoo SearchFrontend Developer
- Contributed to achieving quarterly revenue goals by implementing various experiments, which led to production launches
- Contributed to CI/CD effort by integrating testing framework into the SearchFE platform
- Monitored the deployment pipelines and ensured that deployments succeed without any problems
- Collaborated with cross-functional teams to launch the new design across all international markets
Education
2009
Texas A&M UniversityB.S. Computer Science
Industry Affiliates Program (IAP) scholarship recipient from 2007 - 2009
Skills
- JavaScript
- PHP
- HTML
- CSS
- Tailwind CSS
- Java
- React
- Redux
- MongoDB
- MySQL
- GraphQL
- Gatsby
- Next
- Remix
- Laravel
- Phalcon
- CodeIgniter
- jQuery