Tahmid Sheikh

Senior Application Developer · Washington, DC

A mission-critical national data system used by federal, state, and local agencies.

Cloud Modernization (May 2025 – Aug 2026)

• Developed backend services and front-end features for the program's cloud-native replacement platform: C#/.NET microservices (ASP.NET Core, Entity Framework Core, SQL Server, event-driven messaging) and a Blazor WebAssembly client, deployed with Kubernetes on AWS.
• Led the migration of a core service's public API from MVC controllers to ASP.NET Core minimal API endpoints, rewrote its test suite, and updated OpenAPI client generation so downstream consumers stayed backward compatible.
• Designed and implemented a domain-model change in an event-sourced service: authored the design document and TDD plan and delivered it without a schema migration by versioning configuration in the event payloads.
• Contributed to the shared Blazor client and to service data loaders; coordinated client-package upgrades across the front end and dependent services.
• Wrote NUnit/Moq tests against in-memory databases and worked within Azure DevOps and GitLab CI pipelines (container builds, package publishing, database migration scripts, Kubernetes deployments); remediated static-analysis findings.

Legacy Product (Sep 2024 – May 2025)

• Maintained and enhanced a mission-critical .NET Framework/WinForms desktop and Windows-service application deployed to agency sites nationwide, delivering client-requested updates and defect fixes on a 20-year-old codebase.
• Owned installer and patch engineering: maintained InstallShield/MSI installers and PowerShell deployment scripts, generated and validated release patches, and resolved defects where MSI packaging behavior diverged from required install behavior, verifying each patch through the full multi-step site install.
• Implemented DISA STIG compliance updates, including security-hardening and rollback scripts for servers and workstations.
• Maintained the product's secure software-update and licensing mechanism, and supported the program's transition to the cloud-native platform.

Full Stack Software Engineer · Remote

Chrome extension and student productivity suite for the Canvas LMS; 1.5M+ users, 5-star rating on 8,500+ reviews.

• Built features across a Chrome extension (Manifest V3, TypeScript/React) and its Supabase (Postgres) backend as the product grew from a theming extension into a full productivity suite with user accounts and a Pro subscription tier.
• Developed content scripts that augment Canvas pages in place (themes and dark mode, an enhanced to-do sidebar, and grade tracking) used daily by more than a million students.
• Integrated the Canvas REST API for course and assignment data and the Google Calendar and Microsoft Graph APIs so students can sync assignments to their own calendars.
• Implemented account features on Supabase (auth, cross-device settings sync) and their API endpoints; shipped releases through the Chrome Web Store, including Manifest V3 migration and permission reviews.