Tony Duong

Tokyo, Japan

Backend team for an AI-driven image-processing product (panorama enhancement, generative editing for real-estate imagery).

• ▸Owned several AI image features end-to-end — generative content removal/placement and an AI contextual chat — building the CRUD APIs, file-attachment handling, and technical specs.
• ▸Re-architected the panorama-enhancement pipeline from a Lambda CPU setup to an ECS GPU setup to meet response-time requirements.
• ▸Cut a slow cubemap-conversion job from ~2 minutes to ~10 seconds by optimizing the save flow and reworking the existing architecture — which brought overall processing of 50 images down from ~12 minutes to under 2 minutes.
• ▸Resolved a production deadlock affecting the main web app.
• ▸Organized ~120 Datadog monitors (consistent naming, ownership tags, ANOMALY/LATENCY categories) and added per-job error alerting; revamped SLO/SLI dashboards for accurate health reporting.
• ▸Contributed to driving Honeybadger alerts down from ~9k to ~200 (window of two weeks) in four months by clearing a backlog of recurring exceptions.
• ▸Built funnel/observability analytics on BigQuery and set up Claude Code GitHub Actions to auto-review Dependabot PRs.
• ▸Perform safe weekly dependency upgrades — including the Rails 7.1 → 7.2 migration — resolving breaking changes, consulting changelogs, and running regression tests.
• ▸Develop features day to day using spec-driven development (SDD).
• ▸Initiated the migration and centralization of technical documentation from Qiita to Notion — where it's far more searchable and live collaboration became possible.
• ▸Improved team process: introduced a round-robin PR-review rotation and onboarding paths; mentored teammates through pairing and code review.

Tokyo, Japan

Global digital consultancy delivering client web applications across varied stacks and domains.

• ▸Joined to broaden across clients, stacks, and problem domains after several years inside single-product teams.
• ▸Delivered backend and full-stack work on client engagements, leaning on prior Rails and AWS experience to ramp quickly.

Ebisu, Tokyo, Japan

First full-time engineer at a startup building Offers, a job-matching platform for engineers and designers.

• ▸Helped build Offers, a job-matching platform for engineers and designers, working day to day with product managers and designers to take features from idea to ship.
• ▸Built a Slack integration that notified recruiters and job seekers in real time when a matching position came up.
• ▸Worked on Offers Magazine, a digital engineering-and-design magazine: built the frontend in Vue.js from designer hand-offs (often HTML/CSS) wired to real data, and got hands-on with AWS CloudFront, WAF, and S3 plus a WordPress headless-CMS backend.
• ▸Built a performant analytics tool on AWS Redshift, aggregating and extracting analytical data through complex SQL queries.
• ▸Started out following the senior engineer's lead and quickly grew into an engineer who proposed solutions and designed new features, not just implemented them.
• ▸Operated day to day in Japanese — spoken and written — making clear written communication a core strength; used Datadog and New Relic for observability.
• ▸Promoted within the first year and recognized as a roughly top-5% performer; grew from shipping fast to shipping well under a strong mentor.

Tokyo, Japan

Sole developer at a seven-person e-commerce business (Japanese martial-arts gear), building internal tooling from scratch.

• ▸Built a shipment system integrating the Shopify API with DHL, Japan Post, and FedEx, plus a parcel-tracking dashboard that normalized each carrier's API into one view.
• ▸Wrote accounting/revenue and tax-declaration tooling, Google Apps Script automations for the order pipeline, and Tampermonkey scripts to patch third-party UIs.
• ▸Shipped daily on Rails + PostgreSQL on Heroku as a one-person engineering team — then used the tools in the warehouse myself, which Jordy (CEO) credited with measurably moving the company's productivity forward.

Montreal, Canada

Telecoms company; master's internship.

• ▸Built a Unity VR game prototype integrating the company's internal video-call APIs, shipped as a client-facing demo alongside their telecoms platform.

Shirimono

Japanese-learning app, rebuilt from scratch and shipped on the App Store. AI-generated exercises (Claude Skills), Vertex AI TTS audio, a JLPT N2 course, public multi-locale resource pages, and CloudFront-served assets. Migrated the backend from Render to a single Hetzner VPS with Kamal, saving ~$60/month.

This site — blog + digital clone

A trilingual (fr/en/ja) Next.js 16 blog with a streaming Claude chat grounded in the site's content, a real-time ActionCable chat, and an automated translation pipeline (Claude Code + GitHub Actions) that translates new English posts into French and Japanese.

rails-openapi-generator

A Rails gem that generates complete OpenAPI documentation from source code, with first-class integration for the rails_param library. Built spec-first with spec-kit.

Axie Infinity gene overlay (earlier)

A Tampermonkey extension that pulled each Axie's genes from the API and overlaid them on marketplace listings the site didn't expose. Shared in the game's Discord, it hit hundreds of downloads a day and ~$30/day at peak via a one-time Stripe unlock.