Singapore Permanent Resident · Asia Pacific coverage

Rommel Sunga

Senior Specialist Solutions Architect at AWS, covering End User Messaging and SES across Asia Pacific. Twelve years in communications and SaaS, seven of them customer-facing, built on a foundation of backend and infrastructure engineering. I write the reference architectures, build the demos, and sit in the room when the engineering team and the executive sponsor need to hear the same answer.

Resume (PDF) .docx rommelsunga@gmail.com LinkedIn GitHub DEV.to
8Posts on the AWS Messaging Blog
31Product demos on the 8x8 dev channel
12Years in communications and SaaS
400%Peak quota attainment, Twilio
01

Experience

Software engineering first, then twelve years of carrying the technical side of enterprise deals.

Senior Specialist Solutions Architect, End User Messaging & SES · Amazon Web Services
SINGAPORE · JAN 2025 – PRESENT
Specialist SA for AWS End User Messaging and Amazon SES across Asia Pacific, aligned to the Communication Developer Services go-to-market team and covering opportunities in Australia and New Zealand, ASEAN, and Japan.
  • Published eight posts on the AWS Messaging Blog, lead author on five, each shipping with an open-source reference repository. Field teams across Asia Pacific and Greater China reuse them as documented patterns. Three landed in the first half of 2026 alone: WhatsApp Business messaging, LINE omnichannel fallback, and an autonomous ecommerce agent on Bedrock AgentCore.
  • Lead specialist on enterprise migrations onto SES and End User Messaging from competing providers. Architecture review through production cutover: international number registration and portability, dedicated IP warm-up, per-tenant reputation isolation, suppression and deliverability strategy, and block-list management at hundreds of millions of messages a month.
  • Authored the AWS blog post and open-source reference implementation for an autonomous ecommerce agent built on OpenClaw, Amazon Bedrock AgentCore, and End User Messaging. Buyers shop over WhatsApp and the web while the operator runs restocks, refunds, and orders as natural-language commands from Telegram. The repo is live for field and customer use, and the architecture is now the regional agentic AI reference.
  • Built further demos that became sales assets. Reference implementations pairing End User Messaging with Bedrock agents and knowledge bases for ecommerce and financial services, adopted by teams outside my own region and folded into the regional sales play.
  • Built the CPaaS news digest my GTM and SA team runs on. An automated intelligence feed that tracks the competitive communications landscape and delivers it to the field, alongside a competitive positioning portal and an RFP knowledge base. Sellers get one current reference instead of a dozen stale decks.
  • Technical reviewer and mentor. I review colleagues' blog posts before publication, and run enablement sessions and lightning talks for the regional SA community.
AWS Certified Solutions Architect Associate · AI Practitioner · Cloud Practitioner · multiple internal AWSome Awards
Senior Sales Engineer · 8x8
SINGAPORE · 2023 – 2025
Hit 100% of regional quota in Q4 2024. Built the CPaaS demo platform, created 31 product demonstration videos that have reached roughly 11,000 views on the 8x8 developer channel, and wrote the accompanying product documentation as a technical writer. Received the 8x8 Employee Appreciation Award. See the full demo listing below ↓
Senior Sales Engineer · GuardRails
SINGAPORE · 2022 – 2023
Founded the sales engineering practice at an early-stage application security company, reporting to the CEO and CTO. Ran technical evaluations with CISOs and led on-premise Kubernetes deployments across AWS, GCP, and Azure.
Principal Solutions Engineer · Twilio
SINGAPORE · 2020 – 2022
Top APAC Solutions Engineer for Q2 2021 at over 400% of quota, promoted out of cycle. Won the H1 2020 Transformative Deal Award, given that half to the largest Twilio Video engagement in the region. Second place in the 2021 SE hackathon for real-time transcription and translation over live video.
Software Engineer, then Solutions Engineer · Sendbird
SINGAPORE · 2018 – 2020 · EMPLOYEE ~30
Joined the Y Combinator-backed chat infrastructure company as roughly its 30th employee, before the funding rounds that took it past $100M raised and into unicorn territory. Wore both hats: owned technical engagements with major APAC enterprise accounts while contributing to the core backend platform and AWS infrastructure. Built a live-migration service on Lambda, Aurora, and S3 that moved customer chat history without downtime.
Senior Software Engineer, Data and Infrastructure · Big Fish Games
SEATTLE · 2017 – 2018
Stood up a Hive and Spark cluster on AWS EMR for game telemetry, with Python transformation jobs feeding the analytics pipeline.
Software Engineer, Platform · Rakuten
TOKYO · 2016 – 2017
Built an internal distributed computing platform on Docker, Marathon, and Apache Mesos, with the microservices API layer on Nginx and Consul.
Software Engineer · Avery Products, then Panasonic Avionics
CALIFORNIA · 2014 – 2016
Java applications for online label design, and Linux test tooling for in-flight entertainment hardware.
University of California, Irvine · B.S. Computer Science, Dean's List
02

Applied AI, built on my own time

Two live products and an open-source tool built at nights and weekends. I am listing the experiments for what they taught me about failure modes, because the useful lesson from each was never the feature. It was the moment the obvious approach turned out to be wrong.

Live · Shipped
The Vibe Coding Report ↗
A serverless news aggregator and intelligence platform for the AI developer tools ecosystem, running unattended and publishing daily. It scans the agent, model, IDE, cloud, and builder landscape, then reduces each development to a single line worth reading.
The whole thing is vibe coded, which is the point. It is a working argument that an agent-built system can hold up in production and keep publishing without a person in the loop every morning.
ServerlessAWSPython LLM summarizationRSS ingestionScheduled pipelines
PublishesA daily digest of coding agents, model launches, IDEs, cloud platforms, and app builders.
SectionsDaily, Articles, Themes, Trends, Integrations, and a newsletter.
CoversReleases from Anthropic, OpenAI, Google, and Meta, plus funding, acquisitions, and AI security incidents.
OperatesUnattended. Scheduled ingestion, categorization, and publication with no manual step.
Visit thevibecodingreport.com
Live · Playable in the browser
West Dot Logic Games ↗
A small playable library of browser-first prototypes. Two are live and playable right now, no install and no sign-up. The point of the collection is to build systems-heavy toy worlds and see which mechanics survive contact with a real player.
ReactTypeScriptPhaser AWS BedrockLambdaDynamoDB CloudFrontCDK
Deep BelowA dark fantasy async dungeon crawl with an LLM game master. It narrates each scene, resolves every player's action into one cinematic turn, and drives the AI companions that fill empty party slots. Amazon Bedrock Nova Pro runs the GM, Nova Lite runs the companions.
CorsairsA maritime roguelite of ship navigation, crew management, and combat, built on Phaser and TypeScript.
Why it mattersDeep Below is a working answer to the hardest question in agentic design: how do you let a model drive the experience while keeping the rules deterministic enough to be fair?
Play Deep Below Play Corsairs
winnow ↗
A four-stage Python pipeline that scores 700+ 4K clips on per-frame motion and sharpness, then cuts the dead footage. NVDEC hardware decode took the render from 1.03x to 3.90x realtime.
What brokeA "cut anything still for twelve seconds" rule would have carved 22 seconds out of a beautifully composed held wide shot. A parked camera and a deliberate one are identical to the metric. Intent is not measurable, so the heuristic had to go.
Source on GitHub Write-up
03

Published on the AWS Messaging Blog

Eight posts since October 2025 on the official AWS Messaging and Targeting blog, five of them as lead author. These are the reference architectures customers actually deploy, covering SES tenant isolation, RCS, WhatsApp Business, and agentic messaging on Amazon Bedrock.

18 AUG 2026Lead authorLevel 300RCS
Send rich RCS messages with AWS End User Messaging RCS
Every RCS content type through the SendRcsMessage API in Python: text, files, rich cards, carousels, suggestions. Each example ships a validated payload plus delivery controls for message expiration and per-message SMS fallback.
Rommel Sunga, Bruno Giorgini
13 JUL 2026Lead authorBedrock AgentCoreAgentic AI
Build an autonomous ecommerce assistant with AWS End User Messaging, Amazon Bedrock AgentCore, and OpenClaw
An open-source reference architecture that folds a web storefront, WhatsApp, email, and Telegram into one agent-driven commerce experience. Buyers shop through WhatsApp and the web. The owner runs restocks, refunds, and orders as natural-language commands from Telegram.
Rommel Sunga, Bruno Giorgini, Zip Zieper
05 JUN 2026Lead authorOmnichannel
Adding LINE Messenger to your AWS omnichannel fallback solution
Extends an API Gateway, Lambda, SES, and End User Messaging fallback chain to carry LINE, the dominant messenger across Japan, Thailand, and Taiwan. Covers the architecture change, deployment, and the tests that prove failover actually falls over.
Rommel Sunga, Katsuya Matsuoka, Pavlos Ioannou Katidis
05 JUN 2026Lead authorWhatsApp
Send WhatsApp Business messages with AWS End User Messaging Social
A complete developer path through every supported WhatsApp message type in Python, from plain text and media up through templates, interactive menus, and WhatsApp Flows.
Rommel Sunga, Bruno Giorgini
15 JAN 2026FinOpsWhatsApp
Establishing FinOps management: integrating AWS Budgets with WhatsApp using AWS End User Messaging
Routes AWS Budgets alerts straight into WhatsApp so cost thresholds reach the person who can act on them, wherever that person happens to be.
Ruchikka Chaudhary, Preenesh Nayanasudhan, Rommel Sunga
26 NOV 2025Lead authorAmazon SESPart 3 of 3
Implement Tenants in your Amazon SES environment, Part 3: Implementation guide
The step-by-step migration to SES Tenants across IAM permissions, CloudWatch logging, and EventBridge monitoring. Written for teams moving a live sending estate without torching their reputation.
Rommel Sunga, Tom Gilbert
26 NOV 2025Lead authorAmazon SESPart 2 of 3
Implement Tenants in your Amazon SES environment, Part 2: Assessment and planning
How to assess an existing SES footprint and plan a move to tenant-based reputation isolation, so one noisy sender stops dragging down everyone else on the account.
Rommel Sunga, Tom Gilbert
21 OCT 2025Sole authorSMSObservability
Track OTP success with AWS End User Messaging SMS feedback
Instruments SMS one-time passwords with message feedback to measure real delivery and conversion. The argument underneath it: carrier delivery receipts are third-party and lie by omission, and first-party signal is the only thing worth trusting.
Rommel Sunga
04

31 demos on the 8x8 developer channel

I built the technical demo platform the regional sales team used in live customer meetings, then recorded 31 demonstrations across the 8x8 CPaaS surface for the developer channel, roughly 11,000 views in total. I also wrote the accompanying documentation as a technical writer on the side.

Use Cases with 8x8 CPaaS with our Demo Platform
Use Cases with 8x8 CPaaS with our Demo Platform
8x8 Embedded Communications and APIs · Aug 2024

A single walkthrough covering the SMS, Messaging Apps, Voice Callflows, and Verification APIs, with Jitsi as a Service embedded for in-browser video conferencing.

I designed and wrote the platform end to end in React, Next.js, Node.js, and Python, containerized it with Docker, and ran it on AWS EC2. It gave sellers a live, working surface to demo against instead of a slide deck, and it gave prospects something they could poke at in the meeting.

ReactNext.jsNode.js PythonDockerAWS EC2 Jitsi (JaaS)
Watch on YouTube The channel
CRM and platform integrations 11
Salesforce Chat with WhatsApp Integration 8x8 WhatsApp and Freshdesk Integration Zendesk Integration with WhatsApp using the Messaging API 8x8 and CleverTap SMS Integration Okta and 8x8 SMS API Integration Salesforce with Viber and SMS, one number per agent Salesforce Service Cloud, Viber Integration WhatsApp Messages with 8x8 and MoEngage MoEngage SMS Integration SMS API and Google Sheets through Zapier Detrack and 8x8 SMS Integration
Video and JaaS 9
Translation and transcription in a JaaS conference room 8x8 Video Interaction Overview Livestreaming a video conference to YouTube Livestreaming to Twitch via RTMP Connecting to a JaaS room via SIP and Zoom Dialing into a JaaS room via SIP, audio only JaaS to softphone, video call JaaS to softphone, audio call Taking a participant screenshot with JaaS
Messaging and the Connect portal 7
Automation Builder: a WhatsApp chatbot that schedules Google Calendar meetings Number Masking for logistics and delivery Multichannel Sender for SMS Customer surveys over SMS with the SMS API SMS Engage product overview Creating SMS templates in Connect Contacts, contact groups, and bulk upload
Voice and IVR 3
Voice Callflows API: simple IVR guide Voice Callflows API: webhook setup guide Voice Callflows API: advanced IVR example
Technical writing on the side

Alongside the demos I wrote the accompanying documentation for the 8x8 CPaaS product set, covering the SMS, WhatsApp, RCS, Viber, and LINE channels, the Voice and Video APIs, and the Verification, Number Lookup, and Automation Builder platform services. The docs are here.

05

Tutorials on DEV

Writing I do because I like explaining things, not because a content calendar asked for it. Full profile on DEV.to.

10 AUG 20263 min read#ai#python#opensource
How Claude Code saved my weekends editing family videos
Turning a 700-clip DJI Pocket 3 archive into a watchable timeline with a four-stage Python pipeline. The interesting part is what the naive heuristic gets wrong, and why detection cannot substitute for taste.
09 AUG 20246 min read#docker#react#node
Simple Tutorial: A Dockerized Node.js, React and Next.js Application
A ground-up guide to containerizing a modern JavaScript stack, written for the developer who has read the Docker docs and still has a broken build.
09 AUG 20245 min read#webdev#nextjs
Real-Time Crypto Tracker using Webhooks with React, Next.js and Node.js
Building live price monitoring on webhooks rather than polling, with the event plumbing spelled out.
06

Get in touch

Based in Singapore and a Singapore Permanent Resident, so there is no work pass or sponsorship to arrange. I cover Asia Pacific and am interested in applied AI and forward-deployed architecture roles, the kind where the job is to sit between a customer's engineering team and a model and make the two work together. Happy to talk even if the timing is wrong.

rommelsunga@gmail.com Resume (PDF) Resume (.docx) LinkedIn GitHub DEV.to