UbaidUllah
Sarwar.

1. Director, Wego Engineering R&D Hub

   @ Wego.com
   Nov 2020 – Present
   Hybrid 80% engineering / 20% operations
   • ▸Built and scaled Wego's Engineering R&D Hub from zero — hiring, vendor & ops setup, legal entity — to 30+ engineers across mobile, web, infra, and data analytics.
   • ▸Led the Google Engage SDK partnership — a 6-month direct collaboration with Google to launch a new Travel category on Google Play. Featured at Google I/O 2025.
   • ▸Owned mobile platform direction across Android (Kotlin, Dagger 2, multi-module, Jetpack) and iOS (Swift, UIKit).
   • ▸Shipped ShopCash end-to-end in React Native with a 3-engineer team in ~2 months, later re-architected as an embedded MiniApp inside the flagship apps.
   • ▸Drove local market partnerships — GoLootlo (cashback & e-commerce), Meezan Bank (Islamic banking), and regional airlines — wiring wallets, deals, and native payment rails into the Wego apps.
   • ▸Championed AI-assisted engineering workflows across the team — LLM agents, RAG, and AI coding tools — and shipped a customer-facing AI travel assistant that turns natural-language queries into in-app actions.
   • ▸Wego launched its first retail travel agency outlet (Jul 2025).
   • ▸Stood up VOIP in-app calling (native Kotlin + Janus/SIP + Cloudflare TURN) — free WebRTC calls replacing paid operator phone funnels for customer support.

2. Lead Engineer, Android

   @ Wego.com
   ~2018 – 2020 · Singapore
   • ▸Led Android engineering for Wego's flagship travel app — 83M+ cumulative downloads, millions of MAU, 4.4★+ rating. #1 on Android among all OTAs in MENA.
   • ▸Architected a 30+ module codebase with strict feature isolation, shared core libs, and platform-specific variants.
   • ▸Built a GMS/HMS abstraction enabling build-time swap between Google and Huawei Mobile Services — one codebase, two SDK stacks.
   • ▸Three preload partnerships — Huawei AppGallery, Xiaomi (incl. Android GO memory-optimised single-APK build), Aurora (Russian Android fork).
   • ▸Implemented Jetpack Baseline Profiles, zero-tolerance Detekt gates, and a Fastlane-driven 6-app-store release pipeline.
   • ▸Authored Wego's in-house Android A/B testing framework used across the flagship app.

3. Senior Software Engineer, Mobile & Web

   @ Wego.com
   ~2015 – Feb 2018 · Singapore
   Google I/O 2017 featured
   • ▸Re-architected Wego's mobile + desktop web onto a Polymer-based Progressive Web App — 95+ Lighthouse, multilingual, AMP-fast landing pages.
   • ▸Featured at Google I/O 2017 as a flagship PWA + AMP case study (web.dev/wego, amp.dev/success-stories/wego). Page-load 11s → <1s, conversion +95%, ad CTR 0.75% → 2.55% (3×).
   • ▸Led the Polymer 2.0 → 3.0 migration; built core Web Components in-house (router, state, i18n, RTL).
   • ▸Integrated Arabic / RTL across PWA and Android — full bidirectional support across booking flows.

4. Lead Engineer

   @ gumi Asia
   Mar 2015 – Feb 2018 · Singapore
   • ▸Mobile + live-ops lead for Brave Frontier Global (Android / iOS / Windows Phone) — millions of players across SEA, JP, NA, EU.
   • ▸Built the localisation pipeline (8+ languages) and the release pipeline that took Brave Frontier from weekly to multi-region same-day deploys.
   • ▸Shipped on Disney / Marvel 'Big Hero 6 Bot Fight' (Unity3D) — the studio's first Disney-partnered mobile title.

5. Engineering Lead → Senior SWE → SWE

   @ Earlier
   2010 – 2014 · Gaminations · DeNA / GameView · Cambridge Docs
   • ▸Cross-platform mobile + server engineering across DeNA's social game portfolio.
   • ▸First production mobile shipping experience on .NET + early Android at Cambridge Docs.

Earlier still — pre-mobile — Intelligize (.NET), an SEC filings parser at Northbay Solutions. Where the career began.

• Email

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  contactubaidullah@gmail.com
• Phone

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  +65 8393 9471
• LinkedIn

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  /in/ubaidullah-sarwar
• Medium

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  @contactubaidullah