Available for select freelance work

Shohan Biswas / Infrastructure specialist

I engineer calm into business email.

Google Workspace migrations, DNS authentication, and backend tools that keep teams connected.

Start a projectSee selected work
GitHubLinkedInResearchGateFiverr
EducationCSE / PUST 2024
Primary workGoogle Workspace
Trust layerSPF / DKIM / DMARC
EngineeringPython / Node / Next.js

Selected systems

Work built around real operational friction.

All projects
01Email infrastructure

Workspace DNS Checker

A read-only diagnostic for Google verification, MX, SPF, DKIM, and DMARC records.

  • Next.js
  • TypeScript
  • Google DNS
  • Workspace
View system
02Email infrastructure

Mail Deliverability Test

A DNS-based assessment of routing and sender-authentication readiness.

  • Next.js
  • DNS APIs
  • SPF
  • DKIM
  • DMARC
View system
03Systems automation

Ubuntu Automatic Update Script

A Bash utility that automates package updates for Ubuntu-based Linux distributions.

  • Shell
  • Ubuntu
  • Linux
  • Automation
View system

Services

From DNS audit to clean handoff.

Focused help for teams moving, securing, or repairing business email.

5.0477 reviews / Level 2Explore services
01Google Workspace Setup02Email Migration03DNS Authentication04Deliverability Repair

Public tools

Check before you change.

Run read-only Workspace and mail DNS diagnostics directly from this portfolio.

Open infrastructure tools

Capabilities

One operator, four connected layers.

Full capability map
01Workspace & Mail
02Backend Engineering
03Product Development
04Systems & AI

Field notes

Writing from the work.

All notes