Wego PWA
2016–2018Featured at Google I/O 2017
Re-architected Wego's web onto a Polymer-based PWA — became Google's flagship PWA + AMP case study.
- ·Page-load 11s → <1s
- ·Conversion +95%
- ·Ad CTR 0.75% → 2.55% (3×)
- ·Visitors +26%, iOS sessions +35%
Singapore · Lahore · open to roles
UbaidUllah Sarwar
Engineering leader with 15+ years building consumer mobile and web products at global travel and gaming companies. Hands-on Android architect and the founder of Wego's Pakistan engineering office — scaled to 30+ engineers across mobile, web, infra, and data.
83M+
App downloads across platforms
99.88%
Crash-free users at 1.59M MAU
30+
Engineers in the Pakistan office
6
App stores from one codebase
About
Building product, building teams.
I'm equally comfortable as a hands-on technical lead — mobile architecture, PWA performance, real-time platforms — and as a team operator. For ~5 years at Wego I ran a hybrid 80% engineering / 20% country-operations role: leading the Android platform while standing up Wego's Pakistan engineering office from zero.
That office grew to 30+ engineers across mobile, web, infra and data analytics, and culminated in Wego launching its first retail travel agency outlet in Lahore in July 2025.
Along the way I've been featured at Google I/O 2017(Wego PWA case study — 11s → <1s page load, +95% conversion) and Google I/O 2025 ("What's New in Google Play" — Travel category via Engage SDK).
Based in Singapore for 8+ years. Open to senior engineering, engineering management, and staff IC roles.
Experience
16 years, one story.
Mobile games → travel PWAs → Android platform → engineering leadership. Each step compounded into the next.
Director, Wego Pakistan (Engineering)
@ Wego.comNov 2020 – Apr 2026 · LahoreHybrid 80% engineering / 20% country ops- ▸Built Wego's Pakistan engineering R&D centre from zero — hiring, vendor & ops setup, legal entity — scaled to 30+ engineers across mobile, web, infra, and data analytics.
- ▸Led the Google Engage SDK partnership with Usman Ilyas — 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 VOIP in-app calling (native Kotlin + Janus/SIP + Cloudflare TURN) as part of Wego's Iran crisis customer-support response — free WebRTC vs paid phone funnels.
- ▸Built Wego's in-house customer-facing AI travel assistant — LLM-powered agent that takes natural-language traveller queries and triggers in-app actions.
- ▸Wego launched its first retail travel agency outlet in Lahore (Jul 2025).
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.
Senior Software Engineer, Mobile & Web
@ Wego.com~2015 – Feb 2018 · SingaporeGoogle 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.
Lead Engineer
@ gumi AsiaMar 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.
Engineering Lead → Senior SWE → SWE
@ Earlier2010 – 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.
Projects
Things I've shipped.
A selection of marquee work — the kind that paid the rent, drew Google's attention, or rewired how the company built products.
Google Engage SDK — Travel category
2024–2025Featured at Google I/O 2025
Led 6-month direct collaboration with Google to launch a brand-new Travel category on Google Play via the Engage SDK.
- ·Featured in "What's New in Google Play" I/O session
- ·Phased rollout: US / Canada / UK / Australia
- ·Co-led with Usman Ilyas
ShopCash
20210 → 1 product, React Native
Wego's standalone cashback/deals product. Shipped end-to-end in ~2 months with a 3-engineer team, later re-architected as a MiniApp inside the flagship apps.
- ·iOS + Android + Huawei from one codebase
- ·Wallet, withdrawals, bank integrations, OTP auth, referrals
- ·Same RN code reused inside native flagship apps as a MiniApp
Wego Android Platform
2018–presentFlagship app, 1.59M MAU
30+ module Kotlin codebase shipping to 6 app stores with a GMS/HMS dual-SDK abstraction. Sustained 99.88% crash-free users.
- ·Huawei AppGallery + Xiaomi Android GO + Aurora preloads
- ·22-language localisation with full RTL
- ·Fastlane multi-channel release across 6 stores
- ·Baseline Profiles, Detekt maxIssues=0, Maestro smoke loop
Wego AI Travel Assistant
2024–2026Customer-facing LLM agent
In-house LLM-powered travel assistant that takes natural-language traveller queries and triggers actions across the app's product surfaces.
- ·Natural-language → in-app actions
- ·Integrated across flights, hotels, account flows
VOIP In-App Calling
2024–2026WebRTC + Janus/SIP
Replaced expensive operator phone funnels with free WebRTC calls — built as Wego's Iran crisis customer-support response.
- ·Native Kotlin WebRTC + Janus / SIP-over-WebSocket
- ·Cloudflare TURN for NAT traversal
- ·Sprinklr Voice Connect integration
Brave Frontier Global
2015–2018Live-ops at gumi Asia
Mobile + live-ops lead on a globally launched mid-core RPG. Built the localisation pipeline and the release infrastructure for multi-region same-day deploys.
- ·Millions of players: SEA / JP / NA / EU
- ·8+ language localisation pipeline
- ·Weekly → multi-region same-day release cadence
MiniApps Platform
2022–2026React/Preact monorepo on S3
In-app product surfaces — flights, hotels, gift cards, deals — powered by a React/Preact MiniApps platform serving MENA & APAC inside the Wego native apps.
- ·Shared design system across native + MiniApps
- ·S3-hosted, native-bridge integration
Moments
Talks, teams, and a few award shelves.
Snapshots from 16 years on the road — Tokyo to Singapore to Lahore, game studios to travel platforms to Google I/O.
Google I/O 2025 · Engage SDK Travel category
6-month direct collaboration with Google
Onsite at I/O 2025
What's New in Google Play session
Unity Singapore 2017 · Speaker
Game-dev community talk
Huawei AppGallery preload
Partnership award · GMS/HMS dual-SDK
Standing up the Pakistan R&D office
Singapore → Lahore expansion
Expanding Wego team
Pakistan engineering office
Singapore engineering team
Wego HQ
DeNA · Tokyo · 2012
Cross-platform mobile gaming era
DeNA · Tokyo · 2011
Early mobile career
GoLootlo partner award
Local market partnership
Recognition
From the awards shelf
Take-your-kid-to-work day
Wego Singapore
Contact
Let's talk.
Open to Senior EM, Head of Engineering, and Staff IC roles — especially Singapore-based or remote-friendly. Happy to chat about travel tech, mobile platforms at scale, building offshore R&D, or anything LLM-in-product.