Available for opportunities

Hi, I'm Md Suman Sarker

I build |

Software Engineer specializing in Go, Kubernetes, and distributed systems. Architecting scalable cloud-native platforms with deep expertise in Linux networking. Codeforces Master & LeetCode Guardian.

2102 CF Rating
2735 LC Rating
#34 ICPC Global
200x VPN Speedup
Get In Touch View Work GitHub
engineer.go 
package main

type Engineer struct {
  Name     string
  Role     string
  Rating   map[string]int
}

func New() Engineer {
  return Engineer{
    Name: "Suman Sarker",
    Role: "Cloud-Native SWE",
    Rating: map[string]int{
      "Codeforces": 2102,
      "LeetCode":   2735,
      "CodeChef":   2296,
    },
  }
}
Scroll Down
// 01. about_me

About Me

I'm a Software Engineer based in Dhaka, Bangladesh, with deep expertise in Go, Kubernetes, and cloud-native infrastructure. I specialize in building distributed systems that scale — from low-level Linux networking stacks to Kubernetes operators that automate complex multi-cluster environments.

My current work involves architecting a full Cloud-in-a-Box platform — integrating OpenStack, Harvester, custom load balancers with Envoy Proxy, and Database-as-a-Service solutions. I'm also a core contributor to KubeSlice, where I engineered WireGuard-based VPN tunnels achieving ~200x throughput improvement over legacy solutions.

Outside work, I'm an elite competitive programmer — ranked in the top 1% on Codeforces (Master, 2102), top 0.09% on LeetCode (Guardian, 2735), and an ICPC Asia West Continent Finalist with a global rank of 34.

Dhaka, Bangladesh
Software Engineer (July 2024 – Present)
B.Sc. CSE — HSTU (2019–2024)
sumonahmed.bin@gmail.com
Download CV

Cloud-Native

Kubernetes operators, CRDs, Helm, multi-cluster networking

Linux Networking

VPC, VXLAN, OVS, OVN, WireGuard, CNI, DHCP, bridges

Go Backend

gRPC, Protobuf, Connect RPC, REST APIs, distributed systems

Competitive CP

CF Master · LC Guardian · ICPC Global Rank 34

// 02. tech_stack

Skills & Technologies

Languages

Go Expert
C++ Expert
C Advanced
Bash Advanced

Cloud & Orchestration

Kubernetes Expert
Docker Expert
Helm Advanced
OpenStack Advanced
OpenShift Advanced
OCM Advanced
Harvester Intermediate

Networking

WireGuard Expert
Envoy Proxy Expert
Linux Networking Expert
VXLAN / OVS / OVN Advanced
CNI Advanced
gRPC / Protobuf Advanced

Core Competencies

Distributed Systems Expert
DBaaS / KubeDB Expert
PostgreSQL Advanced
DSA Expert
// 03. work_experience

Professional Experience

Software Engineer

Appscode — Dhaka, Bangladesh July 2024 – Present

Cloud in a Box

Go OpenStack Envoy Proxy KubeDB Connect RPC PostgreSQL
  • Architected a custom networking stack integrating Harvester and OpenStack with low-level Linux networking components (VPC, Subnet, DHCP, VXLAN, OVS).
  • Designed a custom load balancer controller with Envoy Proxy and an Envoy Gateway control plane utilizing Gateway API, natively integrated with OpenStack networking.
  • Built backend APIs with Go Connect RPC and PostgreSQL for state management.
  • Provided Database-as-a-Service (DBaaS) utilizing KubeDB (in-house product), designing backend APIs.

KubeSlice

Go Kubernetes WireGuard gRPC Bash OCM OpenShift
  • Engineered Kubernetes operators and CRDs to facilitate secure multi-cluster networking and automate tenant onboarding across OCM and OpenShift.
  • Implemented high-speed, WireGuard-based VPN tunnels for inter-cluster communication, increasing throughput by nearly 200x compared to legacy OpenVPN.
200x throughput improvement vs OpenVPN

Envoy Gateway & Proxy

Go C++ Kubernetes gRPC Protobuf
  • Developed Gateway API CRDs and controllers in Go to enable dynamic Layer-7 routing and database protocol support (SQL Server, Oracle).
  • Enhanced Envoy Proxy by integrating Layer-7 filters with STARTTLS and protocol-aware security mechanisms using C++.
// 04. open_source

Open Source Contributions

Active contributor to the KubeSlice project — architected and merged WireGuard VPN tunnel support across all core repositories.

kubeslice/worker-operator

Pull Request #437

WireGuard VPN tunnel integration in the core worker operator for KubeSlice multi-cluster networking.

View PR

kubeslice/gateway-certs-generator

Pull Request #58

Certificate generation support for WireGuard gateway nodes in multi-cluster slice networking.

View PR

kubeslice/gateway-sidecar

Pull Request #61

Gateway sidecar enhancements to support WireGuard tunnel management and peer configuration.

View PR

kubeslice/kubeslice-controller

Pull Request #251

Controller-level changes to orchestrate WireGuard tunnel lifecycle and slice networking automation.

View PR
Maintainer

kubeslice/wireguard

Module Owner & Maintainer

Created and actively maintain the kubeslice/wireguard Go module — providing WireGuard abstraction for the entire KubeSlice ecosystem.

View Repository
// 05. competitive_programming

Competitive Programming

Elite competitive programmer with global rankings — bringing exceptional algorithmic efficiency and problem-solving speed to complex engineering challenges.

Codeforces

Codeforces

2102
Master
Top 1% Globally
LeetCode

LeetCode

2735
Guardian
Top 0.09% Globally
CodeChef

CodeChef

2296
6★ Rated
Top 10 in Bangladesh 🇧🇩
AtCoder

AtCoder

1599
Rated
Top 20 in Bangladesh 🇧🇩

🏆 Major Achievements

ICPC Asia West Continent Finalist

2021 & 2023 — Global Rank #34 (2023) | Country Rank #10 (2023)

Dhaka Regional & Rangpur Divisional Champion

Meta Hacker Cup 2022

Advanced to Round 3 — Global Rank #319

View Certificate →

Algorithm Problem Setter

Drafted competitive programming problems for 5+ major national tech carnivals and divisional contests (2024–2025)

// 06. education

Education

B.Sc. in Computer Science & Engineering

Feb 2019 – Sep 2024

Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur, Bangladesh

CGPA 3.23 / 4.00
Data Structures & Algorithms Operating Systems Computer Networks Distributed Systems Database Management
// 07. contact

Get In Touch

I'm actively looking for new opportunities. Whether you have a question, a project idea, or just want to say hi — my inbox is always open!

Email

sumonahmed.bin@gmail.com

LinkedIn

md-suman-sarker-63a952237

GitHub

@sumon009838

Phone

(+880) 1795513406

Say Hello