Trace skill to evidence.

A small, highly available K3s environment running on a Proxmox bare-metal laptop cluster.

• 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.

A football ticket marketplace.

• Reduced a stream processing workload from 1 GB to 200 MB using AsyncGenerator.
• Refactored and tuned SQL queries with targeted index hints.
• Established safe database transaction and raw SQL patterns.

An international event ticket marketplace.

• Owned the technical and partner communication for a new ticket affiliate integration.
• Delivered B2B integrations with partner teams in Spain, the US, and Israel.
• Integrated MaxMind minFraud and introduced stale-while-revalidate caching.

An observability-focused, event-driven web crawling platform.

• Migrated to EKS with cluster autoscaling and RabbitMQ-driven external metrics.
• Correlated logs, traces, and metrics with OpenTelemetry, Loki, Tempo, and Prometheus.
• Provisioned AWS infrastructure with Terraform and Ansible, then bootstrapped self-managed K3s with Rancher and Helm.

A graphic resource management system built with overseas teams.

• 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.

A large-scale distributed crawling system with 800 worker instances.

• Reduced deployment cost by 60% with fault-tolerant workloads on AWS ECS.
• Built a Redis queue with at-least-once delivery from scratch.
• Autoscaled workers using custom AWS CloudWatch metrics.

An NLP pipeline for Excel input with analytical charts and graphs.

• Implemented the NLP data processing pipeline.
• Integrated proprietary OAuth 2.0 authorization code SSO.
• Created a containerized local workflow with Docker Compose.

A multi-tenant laboratory workflow system delivered as a solo full-stack engagement.

• Deployed a secure, highly available platform onto four empty Ubuntu VMs.
• 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.