Phatcharaphan Ananpreechakun

The telepharmacy platform

• A patient opens a LINE Official Account or the pharmacy's own app, is matched to an on-duty pharmacist, and goes into a live video consultation with real-time chat over Laravel Reverb and Pusher.
• E-prescription issuance and persistent consultation history, so the same pharmacist can follow the same patient across refills rather than starting cold every time.
• Three Vue 3 + TypeScript surfaces — pharmacist console, patient LIFF app, back-office — over one Laravel API.
• Deploys as a single docker-compose stack: Caddy terminating TLS for five subdomains, the API, the WebSocket server, a queue worker, and the three SPAs. It either runs standalone or plugs into a pharmacy's existing management software.

Nicha — the AI assistant layer

• Built "Nicha", an n8n-orchestrated assistant that sits inside the pharmacy's own software and answers in plain Thai — demand forecasting, an inventory snapshot, medical-knowledge cross-checks, triage support, purchasing suggestions, and agentic automation of the repetitive steps.
• A second surface answers customers directly in LINE, through the Messaging API, in the same channel they already use to talk to their pharmacy.
• AI-powered healthcare and sales-assistant workflows on Vertex AI, including generated patient-education content and automated post-consultation follow-up.
• Presented as part of Arincare's showcase at a Google Cloud TH.AI Leaders Demo Day.

Recommendation, scoring, and the boring parts that matter

• Product recommendation from market-basket analysis (mlxtend), with Redis caching and scheduled batch jobs so the shop-front never waits on the model.
• A Dagster pipeline for product scoring, plus payment and search optimization.
• Cut platform latency by roughly 30% through database query optimization and a caching strategy, alongside ongoing API architecture work.

TMBThanachart Bank — ttb touch, the bank's flagship retail app

• Designed and built a personalization card engine — a set of Java Spring Boot microservices surfacing contextual, targeted cards to 5.5M+ users based on in-app behaviour, transaction patterns and campaigns.
• Architected it across services communicating via Feign clients and Kafka event streaming: a core personalization API, a Spring Batch service pre-computing cards on scheduled overnight jobs, and a Firebase FCM service for push. MongoDB for persistence, reactive Redis to keep the mobile experience fast at scale.
• Built the campaign-management CMS in React with Redux Toolkit — drag-and-drop card ordering, a rich-text editor, dynamic form-driven configuration — tested with React Testing Library and Vitest.
• Delivered the native clients in Swift and Kotlin; enforced quality with JUnit 5, Mockito, and JaCoCo/SonarQube coverage gates, and mentored junior engineers through code review.

Bank of Ayudhya (Krungsri) — GO by Krungsri Auto

• Built the Loyalty & Privileges module — points, rewards, partner offers — for the super app on both iOS (Swift) and Android (Kotlin), using MVVM, Koin DI and LiveData/Coroutines as a standalone feature module.
• Integrated The 1, Central Group's loyalty programme: member linking, point verification, and PDPA-consent onboarding so customers could connect their points and redeem in-app.
• Implemented the campaign and privilege catalog with QR/barcode redemption and category browsing, consuming OAuth/APIM-secured APIs on a Kotlin Spring Boot backend over Amazon DynamoDB.
• Drove quality with TDD — unit, integration and Espresso UI tests — plus JUnit 5/MockK on the services, JaCoCo coverage enforcement and ktlint gates in CI.

Krung Thai Bank — Merchant Management System

• Redesigned and rebuilt merchant onboarding and administration as multiple Java Spring Boot services covering core merchant management, QR payments, Alipay, and government-scheme (Pracharath) payments, with an Angular front end and HATEOAS-style REST.
• Designed the data layer on SQL Server with JPA/Hibernate across 20+ entities, and handled asynchronous processing with JMS messaging (ActiveMQ/Artemis).
• Secured the platform with Spring Security and delivered the merchant experience across native Android apps and an Android WebView app with UAT/production build flavours.
• CI/CD on Jenkins + Docker with SonarQube gates; reliability driven by Robot Framework backed by a dedicated mock-data service.

The Stock Exchange of Thailand

• Built and maintained the large-scale investor and broker-admin trading portal — portfolio, order status, real-time contract notes, e-statements, market reports — in JSP/Java with Spring, used across multiple brokerage firms.
• Developed supporting Spring Boot services: a fund-trading API gateway, a wealth-management service and a user-management module, and integrated e-payment deposit and transfer flows with SCB, KBANK, Krungsri and UOB — including retransmission and reconciliation.
• Built the IPO subscription platform on a Go backend over MongoDB with a JSP front end, backed by Go unit and integration tests, plus a React module for fund-payment configuration with Excel bulk upload.
• Developed Streaming Fund+, a mutual-fund trading iOS app in Swift, and optimized the Streaming stock-trading iPhone app for performance.
• Everything else here was internal — broker admin portals and settlement services behind a login, with nothing public to link to.

dtac — SIM registration, KYC and number portability

• Built in-store tools for DTAC Hall and call-centre staff: Java smart-card modules reading Thai national ID and SIM cards, e-signature capture, and barcode/QR scanning for fast SIM registration and KYC.
• Developed the Mobile Number Portability portal in Java Spring MVC — OTP over SMPP, multi-domain LDAP auth, package and promotion search, port-in order management — with multithreaded validation and AES/CBC-encrypted data exchange.
• Built Go REST services bridging telecom backends (Siebel, HLR, MNP, Tuxedo) with XML↔JSON/SOAP transformation, behind an AngularJS 1.3 front end.
• Drove reliability with Robot Framework automated testing across the SIM registration and number portability flows — the paths where a failure means a customer standing at a counter with no working SIM.

TPH Global — finance and payroll platforms

TPH ships more than one product, and I worked across several of them rather than a single app.

• Digital Paper Flow — purchase-order and invoice approval for finance teams. Every document moves through draft → pending → approved with its own approval chain, attachments and comment thread, so the audit trail is the workflow rather than something reconstructed afterwards.
• Led development of a payroll platform in React/TypeScript and Node, with REST integrations, real-time synchronisation, and unit and integration tests.
• Ran the cloud workloads on AWS — EC2, RDS PostgreSQL, CodePipeline and CloudWatch — which made releases repeatable and gave the team actual production visibility.

• Speaker at Angular Bangkok, ReactiveX Bangkok, and Women Techmakers events.
• Ran workshops on Angular, Test-Driven Development and Robot Framework at universities and in tech communities — including Maejo University, Mahanakorn University of Technology, and in-house at Food Passion.