Hello! 👋

I'm Masudur Rahman

Senior Software Engineer (DevOps) · Pathao Ltd (Fintech Engineering) | Go · Kubernetes · Observability · CKA Certified

About Me

Senior Software Engineer with 7+ years of experience in Go backend development and Kubernetes infrastructure.

At Pathao Ltd (Fintech Engineering), I build and operate production-grade platform infrastructure — spanning immutable Talos Linux clusters, GitOps pipelines, custom observability stacks, and WAF security layers.

Previously at AppsCode Inc. (5 years), I designed and maintained multi-tenant Kubernetes management platforms, led teams on cloud-native SaaS products, and contributed to open-source projects including Gitea, Cluster API GCP, Grafana SDK, and NATS.

CKA certified, currently working toward CKS.
Competitive programming background — ICPC Dhaka Regional finalist, Codeforces max rating 1702, 1400+ problems solved.

Languages:

Go C++ Bash

Architecture:

RESTful APIs Event-Driven (NATS) gRPC

Cloud & Infra:

GCP Kubernetes Docker Talos Linux Flatcar

Observability:

Prometheus Grafana Custom Exporters

IaC & CI/CD:

Terraform Ansible Helm GitHub Actions ArgoCD

Data:

PostgreSQL NATS BigQuery

Security:

CrowdSec Bunkerweb iptables

Experience

Senior Software Engineer (DevOps)

Pathao Ltd., Fintech Engineering

Jan 2024 - Present

Deployed Talos Linux Kubernetes clusters and automated Flatcar OS lifecycle operations to build an immutable, repeatable cluster foundation.

Tools:Talos LinuxFlatcarKubernetesTerraformAnsible
Set up Apache Airflow pipelines on Kubernetes to migrate high-volume on-premise financial data into GCP BigQuery for analytics.

Tools:AirflowKubernetesHelmPostgresGCP BigQueryAnsible
Built custom Prometheus exporters and Grafana dashboards to improve observability and proactive monitoring across critical services (DNS, GitLab, Harbor).

Tools:PrometheusGrafanaExportersKubernetes
Resolved node over-utilization by introducing Kubernetes Descheduler to automate workload rebalancing and improve overall cluster efficiency.

Tools:KubernetesDeschedulerHelm
Hardened stateful services and infrastructure using host-level firewall rules, NFS-backed storage, and a Bunkerweb + CrowdSec WAF stack.

Tools:iptablesNFSBunkerwebCrowdSecLinuxKubernetes
Engineered secure cross-site DC–DR connectivity using Nginx Gateway and Squid proxy for controlled and observable traffic routing.

Tools:NginxSquidKubernetesNetworking

Lead Software Engineer

AppsCode Inc.

Jan 2023 - Dec 2023

Led the design and maintenance of AppsCode API Server, a RESTful API for managing Kubernetes clusters.

Tools:GoREST APIsKubernetesHelm
Restructured the cluster import flow for AppsCode Console, improving user experience and performance.

Tools:GoKubernetesHelm
Implemented a dynamic feature controller for imported clusters (monitoring, security).

Tools:GoKubernetes
Restructured the licensing system to automate license issuance, validation, and enforcement.

Tools:GoBackend
Packaged AppsCode Console as a Service, deployable through multiple DNS providers and cloud storage services.

Tools:CloudflareRoute53CloudDNSGCSS3

Senior Software Engineer

AppsCode Inc.

Jan 2021 - Dec 2022

Designed and maintained ByteBuilders API Server.

Tools:GoKubernetesHelm
Added support for importing Kubernetes clusters (Managed, Public & Air Gapped) into the ByteBuilders dashboard.

Tools:GoKubernetes
Implemented a background task manager for long-running operations, pod log/exec features, and invoice generation via NATS.

Tools:GoKubernetesNATS
Developed a Prometheus proxy server for Grafana datasource access.

Tools:GoPrometheusGrafana
Added CI/CD pipelines across projects in GitHub Actions.

Tools:GitHub ActionsCI/CD
Ran production deployments and day-to-day operations; mentored junior engineers.

Tools:KubernetesHelmOperations

Software Engineer

AppsCode Inc.

Nov 2018 - Dec 2020

Added GCE support to Pharmer using Cluster API for Kubernetes cluster provisioning.

Tools:GoKubernetesCluster APIGCE
Integrated Stripe payment APIs (products, plans, payments, invoices).

Tools:GoStripeBackend
Built a Kubernetes controller for provisioning and managing Grafana dashboards and datasources.

Tools:GoKubernetesGrafana

Projects

01OwnerHobby

Expense Tracker Bot

A Telegram bot built with Go to manage and track personal finances. Parses natural language inputs to record expenses, income, transfers, and loans directly from chat. Supports multi-account management (cash, bank, etc.), categorized budgeting summaries, and automated PDF reports. Designed for self-hosting with a simple, automation-friendly workflow.

GoTelegram API

02OwnerHobby

Pawsitively Purrfect

Pet adoption web app in Go + GraphQL. Follows Service-Repository-Data pattern with a gRPC-based data layer.

GoGraphQL

03Lead Software EngineerProfessional

ByteBuilders by AppsCode

Back-end server for a Kubernetes dashboard built with Go. Features Stripe payment integration, a NATS event-driven background task manager for long-running operations, and a cluster import wizard supporting Managed, Public, and Air-Gapped Kubernetes clusters.

GoNATS

04ContributorProfessional

Grafana Operator by AppsCode

Grafana Operator is a Kubernetes Controller for Provisioning and Managing Grafana Dashboards and Datasources. It's based on a grafana sdk. Contributed in adding the initial version of the operator. Also added E2E tests using Ginkgo.

Go

05ContributorProfessional

Pharmer by AppsCode

Pharmer is a Kubernetes Cluster Manager using Kubeadm & Cluster API. Contributed in adding support for creating Kubernetes Cluster in Google Compute Engine using Cluster API.

Go

06ContributorProfessional

Logger by AppsCode

nats-logr is a logr implementation using NATS. union-logr is a logr implementation that aggregates multiple loggers. Implemented these loggers which impacted a great deal in Pharmer project.

GoNATS

07OwnerAcademic

Facial Expression Recognition Using CNN and SVM Approach

Jan 2018 - Oct 2018

Developed a program to recognize Facial Expression from a static image. CNN and SVMs used to train and classify facial expressions into various categories. Python, TensorFlow, SVM, OpenCV used for image processing and machine learning.

PythonTensorFlowSVMOpenCVMachine LearningImage Processing