Rokibul HasanAI engineer and DevOps engineer

AppsCode Inc.

Software Engineer, Jan 2023 to Dec 2024. Promoted to Senior Software Engineer, Jan 2025.

• Built a centralized multi-cluster management solution for public and private Kubernetes clusters via the ACE Dashboard.
• Developed Kubernetes operators and APIs to automate authentication and authorization with secure kubeconfig generation.
• Designed and implemented a multi-tenant monitoring system using OpenTelemetry, Thanos, ClickHouse, and Perses.
• Packaged ACE as a self-hosted service for deployment across vendor-managed and self-managed Kubernetes clusters.
• Integrated high-impact features into the ACE API Server, enhancing platform capabilities and scalability.
• Contributed to the deployment, maintenance and reliability of AppsCode production servers.

Global Clients (Upwork)

• Built a real-time voice AI agent: streaming speech-to-text, access-filtered hybrid retrieval over Qdrant, LLM generation and cloned-voice synthesis, delivering spoken replies 0.83–1.17s after end of turn, plus a lip-synced video avatar.
• Designed the GPU serving layer behind it: pod-first routing with serverless overflow, per-endpoint circuit breakers, and an autoscaler that learns each pod's real concurrency, and benchmarked capacity at ~11.5 rps and ~25 concurrent users per pod at p95 ≤ 6s.
• Built the voice backend for a Unity game with an LLM-powered companion character, cutting time-to-first-audio from ~7s to ~1.5s and removing 40-60% of inference calls with an event pre-classifier.
• Delivered an infrastructure automation suite for enterprise OpenShift clusters using Ansible and ArgoCD for GitOps-driven continuous deployment.
• Architected and deployed highly scalable backend systems for international clients using Go and Python.
• Automated infrastructure provisioning and multi-region deployments using Kubernetes, Terraform, and GitHub Actions.
• Optimized high-traffic databases (PostgreSQL, ClickHouse) for low-latency retrieval and real-time processing.
• Maintain a 100% Job Success Score and 'Top Rated Plus' status for consistent high-quality delivery.