{ "schemaVersion": "4.0.0", "profile": { "name": "Hà Minh Chiến", "handle": "wermarter", "title": "Senior backend developer", "tagline": "I build dependable systems and codebases that are easier to understand tomorrow.", "summary": "Software engineer with four years of backend experience, a practical frontend foundation, and a strong interest in distributed systems, observability, and maintainable architecture.", "location": "District 7, Ho Chi Minh City, Vietnam", "birthYear": 2000, "email": "wermarter@gmail.com", "links": { "github": "https://github.com/wermarter", "linkedin": "https://www.linkedin.com/in/haminhchien" } }, "education": [ { "institution": "VNU-HCM International University", "program": "Software Engineering", "start": "2018-09", "end": "2023-03", "score": "83.8/100" } ], "coreSkills": [ { "name": "NestJS", "projectCount": 5 }, { "name": "Redis", "projectCount": 5 }, { "name": "MySQL", "projectCount": 4 }, { "name": "Ansible", "projectCount": 2 } ], "experience": [ { "id": "gbg-senior-backend-developer", "company": "GBG Group Services", "title": "Senior Backend Developer", "startMonth": 6, "startYear": 2025, "endMonth": null, "endYear": null, "summary": [ "Build ticketing services for a B2B2C marketplace, from affiliate imports and seller inventory to distribution and analytics." ], "projects": [ { "id": "football-ticket-net", "name": "FootballTicketNet", "startMonth": 6, "startYear": 2025, "endMonth": 9, "endYear": 2025, "description": "A football ticket marketplace.", "roles": [ "Backend developer" ], "achievements": [ "Established safe database transaction and raw SQL patterns.", "Refactored and tuned SQL queries with targeted index hints.", "Reduced a stream processing workload from 1 GB to 200 MB using AsyncGenerator." ], "technologies": [ "CQRS", "GraphQL", "MySQL", "NestJS" ], "team": "16 people: 10 backend, 5 frontend, 1 QA", "url": "https://www.footballticketnet.com" }, { "id": "gigsberg", "name": "Gigsberg", "startMonth": 10, "startYear": 2025, "endMonth": null, "endYear": null, "description": "An international event ticket marketplace.", "roles": [ "Backend developer" ], "achievements": [ "Owned the technical and partner communication for a new ticket affiliate integration.", "Troubleshot and hotfixed production services with AWS CloudWatch.", "Integrated MaxMind minFraud and introduced stale-while-revalidate caching.", "Delivered B2B integrations with partner teams in Spain, the US, and Israel." ], "technologies": [ "Serverless", "AWS Lambda", "Fastify", "SQS", "MySQL", "Redis" ], "team": "Around 20 people across several countries", "url": "https://www.gigsberg.com", "featured": true } ] }, { "id": "nexon-mid-level-backend-developer", "company": "NEXON DEV VINA", "title": "Mid-level Backend Developer", "startMonth": 2, "startYear": 2025, "endMonth": 5, "endYear": 2025, "summary": [ "Joined technical interviews for fresher and junior roles.", "Gave an internal talk on distributed systems." ], "projects": [ { "id": "project-cc", "name": "Project CC", "startMonth": 6, "startYear": 2024, "endMonth": 5, "endYear": 2025, "description": "An observability-focused, event-driven web crawling platform.", "roles": [ "Developer", "DevOps", "SRE", "Lead" ], "achievements": [ "Provisioned AWS infrastructure with Terraform and Ansible, then bootstrapped self-managed K3s with Rancher and Helm.", "Migrated to EKS with cluster autoscaling and RabbitMQ-driven external metrics.", "Correlated logs, traces, and metrics with OpenTelemetry, Loki, Tempo, and Prometheus.", "Maintained crawlers for more than 20 sites." ], "technologies": [ "Kubernetes", "RabbitMQ", "Grafana", "NestJS", "Redis" ], "team": "8 people, autoscaling to a minimum of 1", "featured": true }, { "id": "project-af", "name": "Project AF", "startMonth": 2, "startYear": 2025, "endMonth": 5, "endYear": 2025, "description": "A graphic resource management system built with overseas teams.", "roles": [ "Backend developer", "Lead" ], "achievements": [ "Set up a backend monorepo around Clean Architecture.", "Reviewed backend work and collaborated on schema design and migrations.", "Analyzed frontend issues and coordinated backend tasks." ], "technologies": [ "Kafka Streams", "OpenSearch", "CloudFront", "Electron", "React", "MySQL", "NestJS" ], "team": "8 people: 3 frontend, 3 backend, 2 Electron" } ] }, { "id": "nexon-junior-backend-developer", "company": "NEXON DEV VINA", "title": "Junior Backend Developer", "startMonth": 4, "startYear": 2023, "endMonth": 1, "endYear": 2025, "summary": [ "Developed web applications and internal tools for a Korean game company while collaborating in English with overseas managers and developers." ], "projects": [ { "id": "project-bc", "name": "Project BC", "startMonth": 11, "startYear": 2023, "endMonth": 5, "endYear": 2025, "description": "A large-scale distributed crawling system with 800 worker instances.", "roles": [ "Developer", "DBA", "SRE" ], "achievements": [ "Reduced deployment cost by 60% with fault-tolerant workloads on AWS ECS.", "Autoscaled workers using custom AWS CloudWatch metrics.", "Improved throughput and memory use with streaming and micro-batching.", "Used Grafana, InfluxDB, and ad-hoc Redis and MySQL queries for on-call troubleshooting.", "Maintained crawlers for YouTube, Bilibili, and Steam.", "Built an ingestion pipeline with Snowflake and MySQL stored procedures.", "Built a Redis queue with at-least-once delivery from scratch." ], "technologies": [ "Node.js", "InfluxDB", "ECS Fargate", "CloudWatch", "Snowflake", "Grafana", "MySQL", "Redis" ], "team": "5 people, including 2 overseas teammates", "featured": true }, { "id": "project-inf", "name": "Project INF", "startMonth": 5, "startYear": 2023, "endMonth": 10, "endYear": 2023, "description": "An NLP pipeline for Excel input with analytical charts and graphs.", "roles": [ "Backend developer" ], "achievements": [ "Implemented the NLP data processing pipeline.", "Integrated proprietary OAuth 2.0 authorization code SSO.", "Created a containerized local workflow with Docker Compose." ], "technologies": [ "AWS EC2", "Python", "MongoDB", "RabbitMQ", "NestJS", "Redis" ], "team": "4 people" } ] }, { "id": "hcdc-full-stack-developer", "company": "HCMC Center for Disease Control", "title": "Full Stack Developer", "startMonth": 9, "startYear": 2022, "endMonth": 3, "endYear": 2023, "summary": [ "Worked directly with a laboratory team to turn their sample-testing workflow into a resilient internal platform." ], "projects": [ { "id": "diut", "name": "DIUT laboratory platform", "startMonth": 9, "startYear": 2022, "endMonth": 3, "endYear": 2023, "description": "A multi-tenant laboratory workflow system delivered as a solo full-stack engagement.", "roles": [ "Solo full-stack developer" ], "achievements": [ "Translated detailed requirements directly with the client.", "Deployed a secure, highly available platform onto four empty Ubuntu VMs.", "Evolved the architecture from single-host PM2 to Docker, then a three-node Kubernetes cluster with Contour Ingress, and finally four nodes with Envoy Gateway.", "Built a multi-tenant React interface with QR-code workflows, schema-validated forms, and CASL authorization.", "Built a NestJS monorepo with Redis, MongoDB, gRPC streaming, ABAC authorization, OpenAPI code generation, and PDF export.", "Automated on-premise delivery with GitHub Actions, Kubernetes, Helm, Ansible, Argo CD, Envoy Gateway, Longhorn, MinIO, and observability tooling." ], "technologies": [ "Redux Toolkit Query", "MUI", "React Router", "Suspense", "CASL", "React Hook Form", "Zod", "gRPC", "RxJS", "Clean Architecture", "Puppeteer", "EJS", "ABAC", "OpenAPI", "GitHub Actions", "Helm", "Argo CD", "Envoy Gateway", "Longhorn", "MinIO", "React", "MongoDB", "Kubernetes", "Ansible", "NestJS", "Redis" ], "team": "Solo project", "url": "https://github.com/wermarter/diut", "featured": true } ] }, { "id": "younet-web-intern", "company": "Younet Media", "title": "Web Intern", "startMonth": 5, "startYear": 2022, "endMonth": 8, "endYear": 2022, "summary": [ "Maintained a social-media analytics product and migrated an internal frontend tool from Vue to a React single-page application." ], "projects": [] } ], "projects": [ { "id": "homelab", "name": "Homelab", "startMonth": 11, "startYear": 2023, "endMonth": null, "endYear": null, "description": "A small, highly available K3s environment running on a Proxmox bare-metal laptop cluster.", "roles": [ "Owner", "Operator" ], "achievements": [ "Automated a three-node HA K3s cluster with Ansible.", "Configured Cloudflare dynamic DNS and remote VS Code tunneling.", "Use the lab as a safe place to learn infrastructure by operating it." ], "technologies": [ "Proxmox", "K3s", "Cloudflare", "Ansible" ], "url": "https://github.com/wermarter/homelab", "featured": true }, { "id": "football-ticket-net", "name": "FootballTicketNet", "startMonth": 6, "startYear": 2025, "endMonth": 9, "endYear": 2025, "description": "A football ticket marketplace.", "roles": [ "Backend developer" ], "achievements": [ "Established safe database transaction and raw SQL patterns.", "Refactored and tuned SQL queries with targeted index hints.", "Reduced a stream processing workload from 1 GB to 200 MB using AsyncGenerator." ], "technologies": [ "CQRS", "GraphQL", "MySQL", "NestJS" ], "team": "16 people: 10 backend, 5 frontend, 1 QA", "url": "https://www.footballticketnet.com" }, { "id": "gigsberg", "name": "Gigsberg", "startMonth": 10, "startYear": 2025, "endMonth": null, "endYear": null, "description": "An international event ticket marketplace.", "roles": [ "Backend developer" ], "achievements": [ "Owned the technical and partner communication for a new ticket affiliate integration.", "Troubleshot and hotfixed production services with AWS CloudWatch.", "Integrated MaxMind minFraud and introduced stale-while-revalidate caching.", "Delivered B2B integrations with partner teams in Spain, the US, and Israel." ], "technologies": [ "Serverless", "AWS Lambda", "Fastify", "SQS", "MySQL", "Redis" ], "team": "Around 20 people across several countries", "url": "https://www.gigsberg.com", "featured": true }, { "id": "project-cc", "name": "Project CC", "startMonth": 6, "startYear": 2024, "endMonth": 5, "endYear": 2025, "description": "An observability-focused, event-driven web crawling platform.", "roles": [ "Developer", "DevOps", "SRE", "Lead" ], "achievements": [ "Provisioned AWS infrastructure with Terraform and Ansible, then bootstrapped self-managed K3s with Rancher and Helm.", "Migrated to EKS with cluster autoscaling and RabbitMQ-driven external metrics.", "Correlated logs, traces, and metrics with OpenTelemetry, Loki, Tempo, and Prometheus.", "Maintained crawlers for more than 20 sites." ], "technologies": [ "Kubernetes", "RabbitMQ", "Grafana", "NestJS", "Redis" ], "team": "8 people, autoscaling to a minimum of 1", "featured": true }, { "id": "project-af", "name": "Project AF", "startMonth": 2, "startYear": 2025, "endMonth": 5, "endYear": 2025, "description": "A graphic resource management system built with overseas teams.", "roles": [ "Backend developer", "Lead" ], "achievements": [ "Set up a backend monorepo around Clean Architecture.", "Reviewed backend work and collaborated on schema design and migrations.", "Analyzed frontend issues and coordinated backend tasks." ], "technologies": [ "Kafka Streams", "OpenSearch", "CloudFront", "Electron", "React", "MySQL", "NestJS" ], "team": "8 people: 3 frontend, 3 backend, 2 Electron" }, { "id": "project-bc", "name": "Project BC", "startMonth": 11, "startYear": 2023, "endMonth": 5, "endYear": 2025, "description": "A large-scale distributed crawling system with 800 worker instances.", "roles": [ "Developer", "DBA", "SRE" ], "achievements": [ "Reduced deployment cost by 60% with fault-tolerant workloads on AWS ECS.", "Autoscaled workers using custom AWS CloudWatch metrics.", "Improved throughput and memory use with streaming and micro-batching.", "Used Grafana, InfluxDB, and ad-hoc Redis and MySQL queries for on-call troubleshooting.", "Maintained crawlers for YouTube, Bilibili, and Steam.", "Built an ingestion pipeline with Snowflake and MySQL stored procedures.", "Built a Redis queue with at-least-once delivery from scratch." ], "technologies": [ "Node.js", "InfluxDB", "ECS Fargate", "CloudWatch", "Snowflake", "Grafana", "MySQL", "Redis" ], "team": "5 people, including 2 overseas teammates", "featured": true }, { "id": "project-inf", "name": "Project INF", "startMonth": 5, "startYear": 2023, "endMonth": 10, "endYear": 2023, "description": "An NLP pipeline for Excel input with analytical charts and graphs.", "roles": [ "Backend developer" ], "achievements": [ "Implemented the NLP data processing pipeline.", "Integrated proprietary OAuth 2.0 authorization code SSO.", "Created a containerized local workflow with Docker Compose." ], "technologies": [ "AWS EC2", "Python", "MongoDB", "RabbitMQ", "NestJS", "Redis" ], "team": "4 people" }, { "id": "diut", "name": "DIUT laboratory platform", "startMonth": 9, "startYear": 2022, "endMonth": 3, "endYear": 2023, "description": "A multi-tenant laboratory workflow system delivered as a solo full-stack engagement.", "roles": [ "Solo full-stack developer" ], "achievements": [ "Translated detailed requirements directly with the client.", "Deployed a secure, highly available platform onto four empty Ubuntu VMs.", "Evolved the architecture from single-host PM2 to Docker, then a three-node Kubernetes cluster with Contour Ingress, and finally four nodes with Envoy Gateway.", "Built a multi-tenant React interface with QR-code workflows, schema-validated forms, and CASL authorization.", "Built a NestJS monorepo with Redis, MongoDB, gRPC streaming, ABAC authorization, OpenAPI code generation, and PDF export.", "Automated on-premise delivery with GitHub Actions, Kubernetes, Helm, Ansible, Argo CD, Envoy Gateway, Longhorn, MinIO, and observability tooling." ], "technologies": [ "Redux Toolkit Query", "MUI", "React Router", "Suspense", "CASL", "React Hook Form", "Zod", "gRPC", "RxJS", "Clean Architecture", "Puppeteer", "EJS", "ABAC", "OpenAPI", "GitHub Actions", "Helm", "Argo CD", "Envoy Gateway", "Longhorn", "MinIO", "React", "MongoDB", "Kubernetes", "Ansible", "NestJS", "Redis" ], "team": "Solo project", "url": "https://github.com/wermarter/diut", "featured": true } ], "certifications": [ { "name": "TOEIC", "score": "990/990", "issuer": "IIG Vietnam", "issued": "2023-01" }, { "name": "IELTS", "score": "7.5/9.0", "issuer": "IDP Education Ltd", "issued": "2017-07" } ], "blog": [ { "id": "tending-a-digital-garden", "url": null, "title": "Tending a digital garden", "description": "Why this portfolio is designed as a place for ideas to grow, not a frozen résumé.", "publishedAt": "2026-07-21T00:00:00.000Z", "tags": [ { "type": "topic", "value": "personal" }, { "type": "skill", "value": "Astro" }, { "type": "skill", "value": "MDX" } ], "draft": true, "updatedAt": null, "content": "import SeedCounter from \"../../components/SeedCounter\";\n\n> This is an unpublished MDX example. Replace it with an authored post before setting `draft: false`.\n\nA résumé is a snapshot. A website can be a working notebook. Structured experience data can become a CV, a JSON document, or a new presentation later, while Markdown writing remains easy to own and move.\n\n## Static by default\n\nMost of this page is plain HTML. JavaScript appears only where it adds something useful. This small button is one of those deliberately isolated pieces:\n\n\n\nThe same principle works well in backend systems: keep the simple path simple, and spend complexity only where the behavior genuinely needs it." } ] }