Alex Jin
Software Engineer & OSS Enthusiast
Sofia, Bulgaria I ***** | GitHub | Website I *****
SUMMARY
Experienced Full-Stack Engineer with 9+ years of experience designing and delivering scalable,
high-performance web platforms across publishing, e-commerce, IoT, and travel-tech domains.
Skilled in architecting microservice-based and modular monolith systems using Node.js, Nest.js,
Spring Boot, and AWS / GCP cloud infrastructure. Adept at building rich, performant frontends
with React, Next.js, and TypeScript, and integrating AI-powered features using LangChain and
OpenAI API. Proven track record of contributing to $4M+ revenue growth through performance
optimization, conversion improvements, and user-centric product development. Passionate
about contributing to open source, creating maintainable codebases, mentoring teams, and
shaping robust product architectures that bridge elegant UX with reliable backend engineering.
SKILLS
● PROGRAMMING LANGUAGES: JavaScript | TypeScript | Python | Java | Ruby
● FRAMEWORKS & LIBRARIES: React | Next.js | Angular | React Native | NestJS | Express |
Fastify | Spring Boot | Ruby On Rails | GraphQL | Slate.js | Redux | Zustand | Jotai | Tailwind CSS
● CLOUD & CONTAINERS: AWS | GCP | Vercel | Heroku | Docker | Hasura
● DATA & MESSAGING: PostgreSQL | MySQL | MongoDB | DynamoDB | Redis | Elasticsearch |
Amazon SNS, SQS | Google Pub/Sub, Cloud Tasks | Upstash
● TEST & CI/CD: Jest | Cypress | Playwright | Mocha | TDD | Unit & e2e Testing | GitHub Actions
● TOOLS & PLATFORMS: Git | Figma | Headless CMS | Agile | Scrum | Team Leadership
● AI & MACHINE LEARNING: LangChain | LLM Integrations(OpenAI)
PROFESSIONAL EXPERIENCE
Full Stack Engineer
Publi LLC
Aug 2022 – Present
● Designed and implemented microservice-based publishing architecture using Nest.js on
Google Cloud Run, integrating TypeORM, PostgreSQL, and Upstash Redis/QStash for scalable
content delivery and background job orchestration
● Built an AI-powered editorial experience with LangChain and OpenAI API, enabling
auto-summarization, SEO tag generation, and writing assistance within the editor
● Developed a Slate.js-based WYSIWYG content editor in Next.js/React/TypeScript, supporting
drag-and-drop blocks, embedded media, and collaborative editing with real-time state
persistence
● Engineered NextAuth-based authentication with multi-tenant access control, supporting
team workspaces, domain-restricted publications, and OAuth providers
● Leveraged Upstash QStash and Google Cloud Tasks for distributed task scheduling, ensuring
reliable delivery of async jobs like AI processing, content indexing, and webhook notifications
● Deployed and optimized the platform on Vercel and Google Cloud Run, achieving high
performance and zero-downtime CI/CD using environment-aware build pipelines
● Established component-driven UI architecture with Tailwind CSS and design tokens for
branded, responsive, and accessible digital publications used by multiple editorial teams
Full Stack Engineer
GonnaOrder B.V.
Jun 2020 – Aug 2022
● Architected a modular monolith in Spring Boot powering a multi-tenant online ordering and
order-management platform adopted by 600+ merchants across 15+ European countries
● Designed and deployed REST APIs and a PostgreSQL (RDS) data layer with tenant-based
isolation and auditing, hosted on AWS Elastic Beanstalk with blue/green deployments and
automated CI/CD using GitHub Actions, reducing release time by ~60%
● Developed and maintained the web, mobile, and desktop apps for merchants using Angular
8+, and Ionic, implementing WebSocket-based real-time communication to instantly deliver
new order alerts and trigger automatic receipt printing on connected devices
● Implemented asynchronous, event-driven communication between internal modules using
Amazon SNS and SQS, improving reliability of background tasks such as order notifications
and third-party integrations, and increasing system resilience under load
● Managed Secrets Manager and CloudFormation for secure, reproducible infrastructure;
leveraged CloudWatch dashboards and alerts that reduced incident response time by ~40%
Senior Frontend Engineer
Home Tech Innovation, Inc.
Mar 2018 – Apr 2020
● Led the development of Suvie’s marketing and meal-planner apps (Next.js PWA) serving 10K+
daily active users, driving $2M+ in annual recurring revenue growth through
subscription-based meal services
● Optimized SEO, performance, and WCAG 2.1 accessibility, increasing organic traffic by 30%
and reducing page load time by 25% through Core Web Vitals enhancements
● Collaborated with design and marketing teams on A/B testing of tailored brochure versions
for specific user segments, analyzed performance using GA4 and GTM, and delivered a ~20%
increase in conversion rate and user retention
● Spearheaded the development of Suvie’s mobile app using React Native, Expo, and AWS IoT
SDK providing a seamless UX for real-time smart-oven management
● Partnered with backend engineers using Rails, Solidus, and Hasura to design scalable data
models and role-based GraphQL APIs, reducing API development time by 60% and cutting
latency by 30%
● Established automated code-quality checks using ESLint, Prettier, and GitHub Actions, and
implemented comprehensive unit and e2e testing with Jest and Cypress to ensure reliable,
maintainable releases; mentored two frontend engineers on these workflows and best
practices in code review and CI/CD
Frontend Engineer
Sweet Inn
Feb 2016 – Mar 2018
● Rebuilt Sweet Inn’s booking platform to support its hybrid “apartment + hotel” model, adding
new modules for personalized stay customization, contactless check-in via smart locks,
integrated customer-service chat, and dynamic pricing—boosting booking conversion by
22%.
● Designed and implemented a modular, responsive UI system using React, Next.js, and Styled
Components, ensuring cross-device consistency across 5+ international markets (Paris, Tel
Aviv, Barcelona, Rome, London).
● Integrated Apollo GraphQL and Redux to deliver real-time property and pricing data for
1,000+ listings, improving responsiveness and data integrity between client and backend
services.
● Enhanced performance with route-level code-splitting, image lazy-loading, and caching
optimizations, reducing page-load time by 35% and improving Lighthouse SEO scores.
● Practiced full Test-Driven Development (TDD) using Jest, Mocha, Enzyme, and Cypress,
achieving comprehensive coverage across unit, integration, and end-to-end testing flows.
OPEN-SOURCE CONTRIBUTIONS
TinaCMS
https://tina.io
2022 – 2023
● Collaborated with the core team to maintain TinaCMS, an open-source Git-backed headless
CMS with 13K+ GitHub stars.
● Implemented new features and integrations, authored technical documentation, and
resolved community-reported issues to improve stability and developer experience.
● Assisted with customer onboarding and technical migration from Forestry to TinaCMS
(including enterprise clients like Smashing Magazine).
EDUCATION
Bachelor’s Degree in Computer Science (Engineering)
Fudan University
2010 – 2014
