Heng Ly

Experience

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  AI Solutions

  Mar 2016 - Mar 2017

  Full Stack Developer

  Built an offline full stack restaurant management system (first ever project during 2nd semester of freshmen year)- implement menu management for staff to manage menu item- implement table reservation for staff to set orders to table- implement orders billing and receipt then send it to printer to print it out to customer- implement orders dashboard for management to query for sales statistic- install it on restaurant computer at the counter, teach staff to use it, monitor and fix bugs along the way during dinner timeTools used:- Javascript- MongoDB- MeteorJS + Blaze- Windows OS Show less

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  MOGwee

  Jun 2017 - Jun 2018

  Frontend Developer

  An innovative online platform that offers personalized one-to-one course booking and teaching services. Our mission is to connect students with expert instructors, providing an interactive and tailored learning experience- Worked with UI designer to design and create the website- Implemented user friendly and beautiful on-boarding page- Implemented page for student to find and book for courses- Implemented page for instructor to set their profile and teaching materials- Implemented video-call UI screenTools used:- ReactJS- ReactNative- Google Cloud Show less

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  FocuzSolution

  Jan 2018 - May 2019

  Full Stack Developer

  Software Solution Company- Built KOOMPI learning center app for KOOMPI OS- Built Quiz App project for Sabay CompanyTech used:- VueJS- Electron- ReactJS- Redis- Elixir - Phoenix- GraphQL- Postgresql - Spilo- Docker Swarm- ClickhouseDB- Amazon AWS- Laravel + Blade- MeteorJS- UnitTest,IntegrationTest

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  Cambodia Development Resource Institute (CDRI)

  Feb 2019 - Oct 2019

  Lead Frontend Developer

  Built CDRI Mobile App- Pull data from CDRI website to show on app- Worked with UI designer to design and create the app- Implemented news browsing screen and home screen- Implemented news detail screen- Automatic App Store Deployment Including Screenshot Automation- Save analytics onto FirebaseTech used:- Gitlab CI/CD- Fastlane- Flutter- Firebase

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  Bstylist(Startup)

  Jun 2019 - now

  Full Stack Developer

  Lifestyle and Stylish Blog:Our blog offers an engaging platform for visitors to explore and enjoy a wide range of captivating content and articles. Some of the intriguing topics we cover include:- Fashion news: Stay up-to-date with the latest trends, fashion events, and industry news.- Girl's talk: Engage in empowering discussions on topics that matter to women, from self-care and relationships to career advice and personal development.- Product reviews: Insightful reviews on a variety of products, including beauty, fashion, and lifestyle items.- Entertainment and culture: Delve into the world of entertainment, including movies, music, books, and art, with reviews and recommendations.- Travel adventures: Embark on virtual journeys through our travel articles, featuring exciting destinations, tips, and recommendations.- Wellness and self-care: Discover tips and insights on maintaining a healthy and balanced lifestyle, both physically and mentally.And more! Our blog continuously expands its content to offer a diverse array of topics that cater to our readers' interests.Tech used:- Mailcow/ZohoMail- RockyLinux(hardened)- GatsbyJS- CSS3/StyledComponents(No css frameworks)- Directus- Ansible- Terraform- CaddyServer- AWS Cloudfront + S3- Gitlab CI- Matomo- Google Analytic- Google Cloud Show less

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  Bang24

  Jun 2019 - Jul 2022

  Full Stack Developer

  Reliable and Scalable Technician Provider & Service Platform- Weekly meeting and collaborate with business owner for consensus on direction we all going, progress update and discussion on the UX/UI design and business use case etc- Implemented automated testing for backend and Flutter applications- Setup CD for Flutter app using Fastlane with automatic screenshots- Developed a dedicated technician app that empowers technicians to create and manage services efficiently, enhancing their productivity and service delivery- Created a user-friendly client app that enables seamless service search and booking, ensuring a convenient and hassle-free experience for clients- Implemented an admin web app for staff members to effectively manage bookings and technicians, optimizing the overall operational workflow- Utilized Kubernetes with Google Cloud GKE to establish a scalable infrastructure, enabling the platform to handle increased user demand and traffic efficientlyTech used:- Elixir - Phoenix- GraphQL- ReactJS- Kubernetes - GKE- Postgres Operator - Zalando- PGBouncer- Redis- AWS S3- AWS CloudFront- Flutter- automate test (unit, integration on the server and e2e on mobile apps)- Fastlane- Google Cloud Show less

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  Tiscounts

  Jul 2019 - Oct 2020

  Full Stack Developer + Software Team Lead

  Leading Promotion Sharing SiteForefront of promotion sharing, providing users with a comprehensive and dynamic experience.- Website Maintenance: Maintained the Tiscounts website and its backend, ensuring its smooth operation. Additionally, we have continually added new pages, features, and bug fixes to enhance the user experience.- Newsletter Website: We developed a dedicated newsletter website to engage with our users and provide regular updates on promotions and discounts.- COVID Map Integration: To keep our users informed, we integrated a COVID map into our newsletter website. This feature allows people to check the COVID status based on provinces, providing valuable information during uncertain times.- Slack Bot Integration: We leveraged a Slack bot to facilitate efficient communication and collaboration within our development team. The bot notifies team members about code changes and triggers relevant updates on the newsletter site, ensuring seamless workflow and timely information dissemination.- Intern Training: As part of our commitment to nurturing talent, we led training sessions for groups of interns in both front-end and back-end development. Through these programs, we shared our knowledge and expertise, empowering the interns to grow and develop their skills.- Project Leadership: We successfully led small-scale projects executed by groups of interns, ensuring their effective completion and contributing to their professional growth.tech used:- elm, tiscounts website- elixir, tisocunts backend- react, gatsby for newsletter website- strapi, newsletter backend- slack bot Show less

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  EKYC Solutions CO., LTD.

  Nov 2019 - now

  Infrastructure Specialist + Lead Backend Engineer

  - Built scalable infrastructure to handle high-volume ekyc traffic.- Ensured security with mutual TLS (mTLS) and an internal certificate authority (CA) with Vault and fully automated certificate rotation.- Implemented RabbitMQ and Saga pattern for reliable, distributed ekyc API requests.- Setup Kubernetes cluster from scratch on Rocky Linux with CRI-O runtime, IPVS, Calico, OpenEBS, MetalLB and HAProxy as Load Balancer.- Saved costs by setting up an on-premises opennebula/proxmox cluster for staging servers and HAProxy as Load Balancer.- Implemented CI/CD for ekyc SDK and services deployment, reducing delivery time.- Streamlined development with Ansible and Terraform for repetitive staging server deployment.- Developed an impressive ekyc demo app prototype to showcase capabilities to investors.- Led backend team in integrating ekyc into various projects.- Designed and documented the ekyc system's architecture and billing flow.- Integrated ekyc and ML servers, providing seamless ekyc services to clients.- Secured internal tools and infra access with Boundary.- Provided Kubernetes training for the backend team.- Set up remote Docker engine and Linux access for on-premises development.- Developed API key encryption/decryption library for multi-language server SDKs.- Integrated Signoz for comprehensive logging of requests across multiple distributed services, enabling efficient debugging and performance/traffic analysis.- Setup self-hosted logging with Signoz, Sentry, and Vector+Loki+Grafana.- Established master/replica database architecture and automated backups to S3.- Synchronized with the external database using DBT.Tech used:- Google Cloud- Digitalocean- Amazon AWS- Javascript- Elixir- GoLang- Python- C/C++- Rust- On-Premises- Microservices Show less

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  Techo Startup Center

  Dec 2020 - May 2021

  Co-Founder/Finalist @Reverse Innovation Program

  SaveUp is a mobile game application that focusing on building your tree profile by planting and decorating trees and money saving strategies that will enables users to achieve their saving goals in a fun way.Tech used:- MeteorJS- Wings Payment- Huawei Cloud- Terraform- Ansible

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  Jullee Ousoam

  Feb 2021 - Dec 2022

  Full Stack Developer

  Hotel Management & Booking Website- Implemented room booking using RabbitMQ- Developed blogging site for hotel staff to manage content effectively.- Implement performant and scalable static page and SPA hybrid booking site.- Built admin page to manage hotels, bookings, and real-time notifications.- Utilized Docker, Ansible, Terraform, and GitLab for seamless CI/CD to production.Tech used:- Mailcow- RockyLinux(hardened)- AWS CloudFront + S3- Directus- Elixir, Phoenix - hotel backend and booking engine- GraphQL- RabbitMQ (booking queue)- GatsbyJS (booking site, mTLS connected graphql booking engine plugin)- Svelte (hotel management)- Sentry- Postgresql - Spilo- Docker Swarm- Ansible- Terraform- Haproxy- Matomo- Redis- NFS + Stunnel- Acme.sh- Digitalocean Show less

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  Sastra Film App - Streaming Platforms

  Feb 2021 - now

  Lead Back End Engineer + Sysadmin

  Leading on-demand video media streaming application in Cambodia.- Seamlessly migrated production setup from DigitalOcean to Google GKE for enhanced scalability and performance, handling at least 200% more user requests.- Improved payment service resiliency, reducing failure rate to almost 0.99% and minimizing customer support workload.- Implemented Saga pattern for payment process to ensure distributed transactional process across various services.- Implemented server-side application-level caching, boosting throughput by 30% to 40%.- Implemented scheduled recurring payments and auto-renewing subscriptions.- Integrated over 6 payment methods to enhance user experience and company income.- Optimized code and server setup, reducing infrastructure costs by 20% to 50%.- Implemented promotion features for payment methods and coupon codes.- Conducted peer code reviews and established CI and staging environments for smooth deployments.- Developed per-user view count based on subscription pricing.- Self-hosted Sentry for centralized error logging and debugging.- Implemented Rust-based image upload converter for improved bandwidth and performance.- Set up centralized application logging using Vector and Quickwit.- Established master/replica database architecture and automated backups to S3.Tech used:- NestJS - Typedscript- Cloudflare- Rabbitmq(Workers, Payment, Recurring Payment)- Payment(Wings, TrueMoney, ABA, Cellcard, Acleda, ApplePay, GooglePay)- Kubernetes - GKE- Postgres Operator - Zalando- PGbouncer- Redis- Sentry- Quickwit+Vector- Amazon AWS (S3, CloudFront)- Digitalocean(Staging servers and Sentry)- Google Cloud (GKE)- Rust(Image processor, s3+lambda) Show less

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  MRRetail

  Dec 2021 - Jan 2022

  Full Stack Developer

  Implemented Retail Store Showcase Website for Business Investors- Model database to support showing info on the website and for staff to use to update information of the website on Directus- Implement scalable and performant website using static site generation(Gatsby) and deploy it on S3/CloudFront- Worked with UI designer and business owner to design and create the website Tech used:- AWS S3- AWS Cloudfront- AWS Route53- AWS Lightsail- Gatsby- Directus- Postgres- Wal-G- AWS CodeBuild Show less

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  FreeWatermark

  Mar 2023 - now

  Full Stack Developer

  Free and easy watermarking tool for your sensitive imagesbuilt a free watermark tool to help safeguard sensitive documents before sharing them to others and allows for potential leaks detection and tracing mechanism for added securityTech used:- Flutter - mobile app development- Fastlane - play store/app store ci/cd- Tauri - desktop app development- Svelte - frontend library for desktop app

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  Cambodia Aspiration

  Jun 2023 - Sept 2023

  Back End Developer

  https://cambodiaaspiration.comBackend platform for aspiring entrepreneurs:An innovative backend platform that empowers candidates to build their dream teams, submit their concepts, and collaborate with mentors to validate and advance their ideas, ultimately transforming them into successful startups. This powerful platform offers a seamless and efficient workflow for the entire startup journey.Technical details of my contributions to the backend platform include:- Implemented different policies on team and concept actions based on competition stages, ensuring fair and transparent processes.- Developed a team matching feature that connects individuals based on concept topics and shared interests, facilitating effective collaboration.- Integrated comment functionality, allowing team members and mentors to provide valuable feedback and insights on concepts.- Utilized PostgreSQL functions and triggers to implement comprehensive business validation and policy enforcement.- Coded script to transformed common non-structured data into structured data and saved it to the database for improved organization and accessibility(List of schools in the country with their area).- Integrated Firebase push notifications to enhance engagement and communication, providing real-time updates on comments and replies.- Self-hosted the Supabase backend platform and successfully migrated all data from Supabase cloud to the self-hosted environment. Show less

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  Insignia OSS

  Aug 2023 - now

  Full Stack Developer

  Insignia OSSFully open-source, modern, and secure identity platform that offers a range of powerful features:- passkeys- passwords auth- magic links- phone otp auth- 2fa- oauth provider- oauth logins (generic, google, facebook etc)- cloud native- frontend sdk- admin sdk- server sdk (grpc)- integrate authz with spicedbtech used- rust, actix-web- grpc- postgres- dragonflydb- docker- kubernetesNOTE: currently using internally with some projects, will release to public once simple usage are being tested properly Show less

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  Keeb Whisperer

  Oct 2023 - now

  Full Stack Developer

  Dedicated platform to showcase the keyboards I have meticulously crafted. Here, you will find a stunning collection of custom-built keyboards designed with passion and precision.- Unique Designs: Discover an array of distinctive keyboard designs, each meticulously crafted to offer a blend of aesthetics and functionality.- Materials: Explore keyboards constructed using high-quality materials, ensuring durability and a premium feel.- Customization Options: Dive into the world of customization with various keycap sets, switch options, and color combinations to create a keyboard that truly reflects your personality and preferences.- Build Process: Gain insights into my meticulous build process, from sourcing components to assembly and quality control.- Gallery: Immerse yourself in a visually captivating gallery showcasing the keyboards I have built, highlighting their unique features, intricate details and especially those typing sounds!tech used:- rust, actix web - backend- purescript, deku + tailwind - website- cloudflare pages - spa serving and website ci/cd- fly.io - backend deployment- neon.tech - database(postgres) deployment Show less

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  Credit Bureau (Cambodia) Co., Ltd

  Oct 2023 - Jul 2024

  Senior Backend Engineer + Sysadmin

  Collaboration with a team and business owners to redesign and build a new website version.- Implemented resilient worker to import CBC's client member data from the zip file and populate/update onto the new admin platform- Migrate large and complex SQLite database to PostgreSQL using Vim tricks and macros- Setup quick and easy one-command standalone deployment using docker and docker-compose for Directus backend and other workers- Setup and Manage deployment for QA testing- Collab with the backend team to design and implement a new backend on Directus- Setup production deploymentTech used:- RedHat- Docker- NeoVim- Directus- Rabbitmq- Rust, Axum- PostgreSQL Show less