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Frontend-focused Software Engineer with extensive experience building and optimizing web applications, including performance improvements and server-side rendering. Skilled in A/B testing, authentication flows, and building internal tooling for transaction visualization and workflow efficiency. Also experienced developing Android offline compliance features and designing automated AI-driven browser testing workflows. Background includes corporate travel platform revamps and strong foundations in CS, databases, distributed systems, and software engineering.…Frontend-focused Software Engineer with extensive experience building and optimizing web applications, including performance improvements and server-side rendering. Skilled in A/B testing, authentication flows, and building internal tooling for transaction visualization and workflow efficiency. Also experienced developing Android offline compliance features and designing automated AI-driven browser testing workflows. Background includes corporate travel platform revamps and strong foundations in CS, databases, distributed systems, and software engineering.

Qalbun Salim Buanaputra

Front-End Developer, Web Developer, Software Engineer, +4

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Frontend-focused Software Engineer with extensive experience building and optimizing web applications, including performance improvements and server-side rendering. Skilled in A/B testing, authentication flows, and building internal tooling for transaction visualization and workflow efficiency. Also experienced developing Android offline compliance features and designing automated AI-driven browser testing workflows. Background includes corporate travel platform revamps and strong foundations in CS, databases, distributed systems, and software engineering.…Frontend-focused Software Engineer with extensive experience building and optimizing web applications, including performance improvements and server-side rendering. Skilled in A/B testing, authentication flows, and building internal tooling for transaction visualization and workflow efficiency. Also experienced developing Android offline compliance features and designing automated AI-driven browser testing workflows. Background includes corporate travel platform revamps and strong foundations in CS, databases, distributed systems, and software engineering.

Available to hire

Frontend-focused Software Engineer with extensive experience building and optimizing web applications, including performance improvements and server-side rendering. Skilled in A/B testing, authentication flows, and building internal tooling for transaction visualization and workflow efficiency.

Also experienced developing Android offline compliance features and designing automated AI-driven browser testing workflows. Background includes corporate travel platform revamps and strong foundations in CS, databases, distributed systems, and software engineering.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

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Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Work Experience

Software Engineer (Paylater) at Traveloka (Tangerang, Indonesia)

January 1, 2025 - Present

Improved Paylater repayment page performance by reducing LCP from 5.2s to 2.1s (~60%) and CLS from 0.2541 to 0.0578 (~77%) through migration to server-side rendering. Led frontend implementation of partial repayment feature for Paylater, validated via A/B testing (control: 2.79%, variant: 3.22%), achieving a 15.45% relative uplift in user repayment rate. Built a web authentication challenge module that can be integrated into any Traveloka Paylater app flow, with dynamic challenges (PIN, OTP, NIK verification). Developed a transaction visualization page for internal tools to visualize sequencing and fund flow for financial subledger systems, reducing steps to check subledger mutation by 90%. Implemented a digital signature for offline payment feature on Android to meet OJK compliance. Developed web testing automation using Claude subagent for AI-driven live browser testing to verify code changes.

Software Engineer - Paylater at Traveloka

January 1, 2025 - Present

Improved Paylater repayment page performance by reducing LCP from 5.2s to 2.1s (~60%) and CLS from 0.2541 to 0.0578 (~77%) via server-side rendering. Led front-end implementation of partial repayment feature validated through A/B testing (control 2.79%, variant 3.32%), achieving a 15.45% relative uplift in repayment rate. Built a reusable web authentication challenge module for Traveloka Paylater flows (PIN/OTP/NIK verification). Developed internal transaction visualization pages to reduce steps for checking sub-ledger mutation by 90%. Implemented a digital signature for offline payment feature on Android to meet OJK compliance. Developed web testing automation using Claude subagent to enable AI-driven live browser testing for verifying code changes.

Software Engineer Intern - Corporate Travel at Traveloka

February 1, 2024 - December 1, 2024

Revamped the Traveloka Corporate Travel (B2B) landing page by highlighting key features and benefits, and improving credibility through a dynamic marquee showcasing 2,000+ partner companies. Revamped company management UI for admins to enable cross-feature interactions across Travel Policy, Employee List, Approval System, and related modules, streamlining policy management and administrative workflows.

Software Engineer Intern (Corporate Travel) at Traveloka (Tangerang, Indonesia)

February 1, 2024 - December 1, 2024

Revamped the Traveloka corporate travel (B2B) landing page by highlighting key features and benefits and building credibility through a dynamic marquee showcasing 2,000+ partner companies. Refreshed company management admin UI to enable cross-feature interactions across Travel Policy, Employee List, Approval System, and related modules, streamlining policy management and administrative workflows.

Software Engineer Intern at Corporate Travel Revamp (Traveloka)

February 1, 2024 - December 1, 2024

Revamped Traveloka Corporate Travel (B2B) landing page by highlighting key features/benefits and improving credibility using dynamic marquee showcasing 2,000+ partner companies. Revamped company management UI for admins enabling cross-feature interactions across Travel Policy, Employee List, Approval System, and related modules to streamline policy management and administrative workflows.

Teaching Assistant - Automata Theory at Universitas Indonesia

August 1, 2022 - January 1, 2023

Evaluated homework assignments for 23 students focused on concepts ranging from finite state machines to Turing machines in Automata Theory. Provided intensive tutoring for 5 students, assisted with exam question practice, and delivered weekly lessons covering core Automata Theory concepts.

Automata Theory Teaching Assistant at Universitas Indonesia (Depok, Indonesia)

August 1, 2022 - January 1, 2023

Evaluated homework assignments for 23 students in automata theory, covering concepts from finite state machines to Turing machines. Provided intensive tutoring for 5 students, assisted with exam question practice, and delivered weekly lessons on automata theory concepts.

Teaching Assistant - Automata Theory at Universitas Indonesia (Depok)

August 1, 2022 - January 1, 2023

Evaluated homework assignments for 23 students across topics from finite state machines to Turing machines. Provided intensive tutoring for 5 students including exam-question practice and delivered weekly lessons on automata theory concepts.