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Fullstack, frontend-heavy software engineer with 8 years of experience building and shipping scalable products, and a strong focus on TypeScript and modern frontend frameworks. I’ve mentored developers on Indonesia’s leading mentoring platform and enjoy turning complex domain logic into reliable, user-friendly interfaces. Currently, I’m digitizing Indonesia’s largest state-owned bank, building systems used across 2,000 branches serving 38,000 staff and 18 million accounts—helping cut fraud by 85%. Previously, I architected a frontend stack for a UK trading platform and shipped 3D wayfinding apps used by thousands of visitors in high-traffic Singapore buildings.…Fullstack, frontend-heavy software engineer with 8 years of experience building and shipping scalable products, and a strong focus on TypeScript and modern frontend frameworks. I’ve mentored developers on Indonesia’s leading mentoring platform and enjoy turning complex domain logic into reliable, user-friendly interfaces. Currently, I’m digitizing Indonesia’s largest state-owned bank, building systems used across 2,000 branches serving 38,000 staff and 18 million accounts—helping cut fraud by 85%. Previously, I architected a frontend stack for a UK trading platform and shipped 3D wayfinding apps used by thousands of visitors in high-traffic Singapore buildings.

Viona Kaleb

Full Stack Developer, Front-End Developer, Back-End Developer, +2

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Fullstack, frontend-heavy software engineer with 8 years of experience building and shipping scalable products, and a strong focus on TypeScript and modern frontend frameworks. I’ve mentored developers on Indonesia’s leading mentoring platform and enjoy turning complex domain logic into reliable, user-friendly interfaces. Currently, I’m digitizing Indonesia’s largest state-owned bank, building systems used across 2,000 branches serving 38,000 staff and 18 million accounts—helping cut fraud by 85%. Previously, I architected a frontend stack for a UK trading platform and shipped 3D wayfinding apps used by thousands of visitors in high-traffic Singapore buildings.…Fullstack, frontend-heavy software engineer with 8 years of experience building and shipping scalable products, and a strong focus on TypeScript and modern frontend frameworks. I’ve mentored developers on Indonesia’s leading mentoring platform and enjoy turning complex domain logic into reliable, user-friendly interfaces. Currently, I’m digitizing Indonesia’s largest state-owned bank, building systems used across 2,000 branches serving 38,000 staff and 18 million accounts—helping cut fraud by 85%. Previously, I architected a frontend stack for a UK trading platform and shipped 3D wayfinding apps used by thousands of visitors in high-traffic Singapore buildings.

Available to hire

Fullstack, frontend-heavy software engineer with 8 years of experience building and shipping scalable products, and a strong focus on TypeScript and modern frontend frameworks. I’ve mentored developers on Indonesia’s leading mentoring platform and enjoy turning complex domain logic into reliable, user-friendly interfaces.

Currently, I’m digitizing Indonesia’s largest state-owned bank, building systems used across 2,000 branches serving 38,000 staff and 18 million accounts—helping cut fraud by 85%. Previously, I architected a frontend stack for a UK trading platform and shipped 3D wayfinding apps used by thousands of visitors in high-traffic Singapore buildings.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Software Engineer at Bank Mandiri

January 1, 2024 - Present

Built features for Smart Branch by Mandiri, a digital branch platform deployed in 2,000 Bank Mandiri branches with 38,000 general banking staff and 18 million accounts nationwide, reducing fraud by 85%. Shipped wholesale banking features for KOPRA by Mandiri, the platform behind IDR 10,000+ trillion (USD 600B+) annual transaction volume, recognized as Indonesia’s Best Integrated Trade Financial Platform. Delivered banking workflows that met strict security, compliance, and audit requirements in collaboration with product, backend, and QA teams. Tech includes Angular/React with TypeScript, RxJS, NgRx, and observability with Kibana/Elastic.

Frontend Engineer at Hypestacks

January 1, 2023 - January 1, 2024

Architected and built the frontend stack from scratch for YourPropFirm, a B2B real-time trading analytics platform with USD124M+ revenues, serving 1.2M+ trading accounts and 65+ prop firm clients globally. Worked cross-functionally with frontend, backend, and Power BI to translate complex trading concepts into performant real-time data visualization UI.

Frontend Engineer at SuperApp (YC W18)

January 1, 2021 - January 1, 2023

Owned full frontend delivery across multiple product lines for a social commerce and hyper-local supply chain platform serving Indonesia’s retail ecosystem. Improved test coverage to 90% using Jest and React Testing Library, reducing production regression bugs. Worked with micro frontend patterns and state management to deliver scalable UI.

Frontend Engineer at Adactive Asia

January 1, 2020 - January 1, 2021

Deployed 3D wayfinding systems to major Singapore landmarks including the Supreme Court, Republic Plaza, Woods Square, serving thousands of visitors in high-traffic government and commercial buildings.

Frontend Engineer at Yamisok Platform Indonesia

January 1, 2018 - January 1, 2020

Built Indonesia’s first integrated e-sports community and tournament platform connecting players with tournament organizers and sponsors, including partnerships with Tokopedia, JD.ID, and Firstmedia. Delivered UI features and integrated with backend services using common web frameworks.