Vihanga Jayalath — Android & Full-Stack Product Engineer, Colombo · Export Manifest № VJ-0094

• 1.5M+ users aboard say: one million five hundred thousand and more — XU Tunnel, Google Play
• $3K+ per month, ads say: three thousand US dollars and more, monthly — banner ads, XU Tunnel
• 400 paying subscribers say: four hundred active monthly — FareJudge
• 100+ clients worldwide say: one hundred and more, since 2022 — freelance delivery

Also declared: 100+ subscribers on mobile/security research tooling · ~$200/mo from the systems lab. No invented cargo.

1. 04.1

   FareJudge

   fare verdicts for PickMe & Uber drivers ~400 subscribers in service

   An Android overlay that prices every ride offer per kilometer, the instant it appears, and stamps a verdict: TAKE or SKIP. Driver‑set rules, subscription access, optional auto‑accept where the driver enables it. ~400 drivers pay monthly because it settles a real earning decision in under a second. Founder, Android product engineer.

   Kotlin · Java · overlays · accessibility services · rules engine · subscriptions · backend validation

   Public page ↗

2. 04.2

   EasySeat

   bus seat booking + operator tablets deployed with operators in service

   Seat booking for Sri Lankan bus owners: onboard tablets, operator workflows, real‑time availability, planned auto‑tracking. Built on direct relationships with bus owners — tablets go on actual buses, seat inventory and trip operations go digital. Founder, product engineer.

   Android tablet UX · booking systems · operator portals · location tracking · backend APIs

   easyseat.lk ↗

3. 04.3

   Cogniato

   trilingual AI sales agent for Meta apps persistent memory in build

   ආයුබෝවන් · வணக்கம் · Hello — it sells in Sinhala, Tamil and English.

   An AI sales agent for e‑commerce across Meta apps: product discovery, Q&A, objection handling, order capture, human handoff. Reads product images, holds customer context across long conversations, and keeps persistent memory so a sale never loses its thread. Founder, AI product engineer.

   LLM workflows · multimodal image handling · Meta app integrations · memory systems · e‑commerce automation

   cogniato.com ↗

4. 04.4

   MAGA Procurement System

   enterprise RFQ platform — client build full RFQ lifecycle delivered

   Supplier Android app plus role‑based web platform for a major Sri Lankan engineering company. The whole RFQ lifecycle: supplier onboarding, quotation requests, submissions, comparison, approvals and awarding, notifications, management dashboards. RBAC and auditability for procurement teams and non‑technical suppliers. Full‑stack developer.

   Android · web app · REST APIs · database design · RBAC · procurement workflows · RFQ modules

   maga.lk ↗

5. 04.5

   Meta & Telegram bots

   production bot fleet 10+ delivered ongoing

   Production bots across WhatsApp, Instagram, Messenger and Telegram: sales automation, lead capture, customer support, multilingual AI agents, broadcast systems, workflow integrations. Ten‑plus delivered to clients, many more running for personal use. Bot developer, lead engineer.

   Node.js · Python · Telegraf · Telegram Bot API · WhatsApp Business API · Meta Graph API · webhooks · LLM integrations

6. 04.6

   Doc.lk Channel Watcher

   doctor-appointment watcher open source working

   Self‑hosted watcher for Doc.lk / Doc990: monitors doctor channel pages and sends a Telegram alert the moment a bookable session opens. Healthcare automation as public‑service tooling. Founder, automation engineer.

   Node.js · JavaScript · Telegram Bot API · scheduled workers · systemd · launchd · GitHub Pages

   GitHub ↗

7. 04.7

   HCaptcha & others solver

   computer-vision automation pipeline R&D no discharge port

   Computer vision and browser automation for image‑based web challenges: task orchestration, retries, validation, failure recovery. Demonstrates real‑world pipeline reliability under hostile conditions. Builder, lead engineer. Private R&D — this crate stays sealed.

   Python FastAPI · Node.js · React/Next.js · PostgreSQL · Redis · Playwright · Puppeteer · OpenCV · OCR · Docker

8. 04.8

   Systems Lab

   infrastructure experiments ~$200/mo ongoing

   Linux server operations, infrastructure optimization and experimental deployments — including crypto‑mining infrastructure that pays its own way at roughly $200 a month while uptime, cost and performance get tuned. Operator.

   Linux VPS · Docker · XMRig · monitoring & automation

9. 04.9

   Freelance product engineering

   custom builds, worldwide 100+ clients ongoing

   Custom Android, web, backend and cloud systems for 100+ clients worldwide since 2022 — scoping, design, build, database, deployment, maintenance. Play Store apps shipped and supported since 2022: releases, debugging, iteration.

   Android · Kotlin/Java · TypeScript/JavaScript · Python · Node.js · REST APIs · SQL · Linux · Cloudflare · Docker

   Discharge port: this document, Field 08 ↓

• Mobile app development

  Production Android apps: VPN clients, driver overlays, booking tablets, subscriptions, Play‑Store‑ready builds.

• AI automations, workflows & bots

  Multilingual AI agents for sales, support, lead capture, follow‑ups and internal workflow automation.

• Web development

  Full web apps, portals and dashboards with authentication, roles, databases and deployment.

• Reverse engineering

  APK analysis, decompilation, patching, anti‑tamper review, native code and network protocol research.

• Cyber security

  Security testing, hardening, obfuscation, anti‑tamper checks and safer production deployment.

• Offensive security (white‑hat)

  Penetration testing and vulnerability research with evidence, impact notes and responsible reporting.

• Blockchain & crypto infrastructure

  Crypto/mining infrastructure setup, deployment automation, fleet monitoring and performance tuning.

• Servers & infrastructure

  Global VPS fleet provisioning, traffic routing, security, monitoring, automation and uptime management.

• End‑to‑end product engineering

  Idea to shipped product: scope, UI, mobile/web build, backend, deployment, monetization and operations.

• Meta & Telegram bot development

  Custom bots for sales, support, lead capture and broadcast — deployed on WhatsApp, Instagram, Messenger and Telegram.

• Healthcare appointment automation

  Availability watchers, doctor session alerts, cancellation tracking, booking automation and patient notification systems.

• LNG‑09

  Languages

  Java · Kotlin · Python · TypeScript · JavaScript · C · C++ · C# · Go

• AND‑01

  Android

  Android SDK · Kotlin/Java · services · overlays · accessibility APIs · Play Store releases · AdMob

• BCK‑02

  Backend / web

  Node.js · Express/Fastify · REST APIs · Next.js · PostgreSQL · SQLite · Prisma/Supabase · JWT

• OPS‑03

  Operations

  Linux VPS · Docker · Nginx · Cloudflare/DNS · server provisioning · monitoring · admin panels

• SEC‑04

  Security

  APK analysis · reverse engineering · Frida · JADX · APKTool · Ghidra · IDA · obfuscation · hardening

• AI‑05

  AI

  LLM workflows · memory systems · multilingual agents · image handling · e‑commerce automation