Senior Full-Stack Engineer

Faseeh Ullah

.NET 8 / 9 / 10 • Angular • React • Azure

Microservices & Saga Architect, Performance Recovery Specialist, .NET 8 & Azure Expert, Healthcare & Fintech Systems, Team Lead & Mentor

5+ years modernizing legacy architectures and recovering performance in high-load systems. I own features end-to-end — from fuzzy requirement to production — in environments where performance, reliability, and integration complexity are the daily challenge.

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Open to remote roles & relocation — UK, EU, Gulf
Faseeh Ullah
About Me

Engineer with a
Track Record of Impact

Specialist in .NET 8, event-driven microservices, and distributed patterns including Saga (Choreography & Orchestration). My recent work spans a .NET 8 enterprise portal with deep query optimization, Redis caching, and observability improvements that dramatically reduced response times and deployment friction.

I collaborate across US/EU time zones, mentor junior engineers, and enjoy untangling systems where the original author left two years ago and took the context with them.

Author of the Saga Pattern Series on LinkedIn — covering compensations, idempotency, and production failure modes.
Impact by the Numbers

What I've Delivered

5+
Years Experience
3m 40s
Dashboard Response
4s 300ms
Screen Load Time
27m 15m
CI/CD Build Time
4
EMR Integrations
Redox · Athena · Epic · eCW
Core Competencies

Tech Stack

Languages & Frameworks
C# 12 / 13 .NET 10 / 9 / 8 ASP.NET Core EF Core Dapper Blazor Node.js TypeScript
Frontend
Angular 12–17 React 18 RxJS NgRx Redux Angular Material SCSS
Architecture & Patterns
Microservices Saga Pattern CQRS DDD Clean Architecture REST GraphQL gRPC
Cloud & DevOps
Azure App Service Azure Functions Azure Service Bus Cosmos DB Key Vault AD B2C AWS S3 / Lambda / RDS Terraform Docker Kubernetes Azure DevOps GitHub Actions
Data, Messaging & Observability
SQL Server PostgreSQL MySQL MongoDB Redis Elasticsearch Kafka RabbitMQ Dynatrace SolarWinds DPA Prometheus Grafana
Testing & Security
xUnit NUnit Jest TDD / BDD SOLID OAuth2 JWT / OIDC RBAC
Work History

Experience

Senior Software Engineer (Consultant)

Horizon IT Solutions — Remote / Contract
Oct 2025 – Present
  • Architected a .NET 8 review-and-approval portal consolidating data from 5+ upstream systems, replacing fragmented email/spreadsheet workflows for 17+ reviewers across 5+ teams.
  • Designed event-driven workflows with Azure Service Bus, background workers, and queues for high-volume pricing, invoicing, and approval processing.
  • Optimized dashboard queries with SolarWinds DPA and EF Core — worst-case retailer response dropped from 3+ minutes to 40 seconds under production load.
  • Built a regex-driven, config-as-data routing layer — new clients onboard via database insert, eliminating years of brittle if/else logic.
  • Modernized Azure DevOps pipelines with gated builds and automated testing, cutting mean build-and-deploy from 27 to 15 minutes.
  • Introduced Dynatrace for performance profiling and observability across distributed services. Acted as client-facing technical lead, mentoring junior engineers through code reviews and pair programming.
.NET 8 / 9 Azure Service Bus Redis Angular 17 React Dynatrace SQL Server OAuth2 / OIDC Docker

Software Engineer II

Devsinc — Hybrid / Full-time
Jul 2023 – Oct 2025
  • Led full migration of legacy Java applications to .NET 8 with React frontend (Dev Vaults fintech), introducing CQRS, microservices, and Azure AD B2C.
  • At Vatica Health, integrated major EMR systems (Redox, Athena, Epic, eCW) while securing healthcare data with Azure Key Vault and AD B2C.
  • Led Redis caching and query-tuning initiative — worst-screen response reduced from 4 seconds to 300ms; pattern later adopted by other teams.
  • Deep database tuning on SQL Server and MySQL using SolarWinds DPA during high-traffic clinical cycles.
  • Applied Clean Architecture, SOLID, and TDD/BDD while mentoring 4 junior engineers to independent feature delivery within six months.
.NET 8 / 6 Microservices CQRS Redis Angular 12+ React Azure AD B2C SolarWinds DPA SQL Server

Full Stack Developer

Zentech Solutions
Jan 2021 – Jun 2023
  • Built Order Management System from scratch in Angular 14 + .NET 6 on Azure, replacing manual PDF/email workflows and improving operational throughput by ~25%.
  • Delivered admin portal for a cycle-store chain, unifying inventory, repairs, and customer history from previously siloed sources.
  • Developed custom JSON merge tool in .NET 6 that prevented configuration overwrites during deployments, reducing production incidents by ~15%.
  • Established xUnit/NUnit testing foundation adopted as the team standard.
.NET 6 ASP.NET Core Angular 14 / 16 SQL Server Azure xUnit / NUnit

Bachelor of Science in Computer Science

FAST-NUCES (National University of Computer and Emerging Sciences)
Featured Work

Projects

Healthcare · EMR Platform

Vatica Health

Visit
  • Integrated Redox, Athena, Epic, eCW — enabling seamless healthcare data exchange and improving care coordination across providers.
  • Secured sensitive health data with Azure Key Vault and AD B2C; optimized .NET Core APIs and SQL Server / MySQL for high-traffic clinical cycles.
  • Delivered scalable Azure DevOps deployments with Redis Cache, ensuring real-time, reliable access to clinical data.
.NET 8 EMR Integration Redis Azure Key Vault AD B2C SQL Server
Retail · Large-Scale Platform

Sodexo

Visit
  • Delivered job-management features and production fixes on a large retail platform using Blazor and .NET 6 at scale.
  • Shipped a new portal to automate recurring job processes and manage scheduling data efficiently.
  • Improved operational throughput through event-driven background job orchestration and reliable data management.
.NET 6 Blazor Azure DevOps SQL Server Background Jobs
Fintech · Private

Dev Vaults

Private
  • Led backend migration from Java to .NET 8 with React frontend, implementing CQRS and microservices architecture from scratch.
  • Optimized MySQL with EF Core; deployed via Azure DevOps with Azure AD B2C for secure, modern authentication.
  • Collaborated with clients and business analysts to translate complex legacy patterns into maintainable, scalable services.
.NET 8 CQRS React MySQL / EF Core Azure AD B2C Microservices
Retail Enterprise · Horizon IT Solutions

Enterprise Review & Approval Portal

Current
  • End-to-end ownership of a .NET 8 portal consolidating 5+ upstream systems for 17+ reviewers, replacing fragmented email workflows.
  • Dashboard query optimization reduced worst-case response from 3+ minutes to 40 seconds under production load.
  • Config-as-data routing layer eliminated brittle if/else logic — new clients onboard via database insert with zero code changes.
.NET 8 Azure Service Bus Angular 17 Redis Dynatrace SQL Server
Peer Validation

Recommendations

"Faseeh has a great problem-solving mindset and stays calm under pressure. Many times he stepped up to handle critical production issues and helped stabilize projects. He's proactive, dependable, and always eager to learn new things. Apart from his technical strengths, he's a solid team player who mentors new joiners and brings a positive vibe to the team."

AR
Abdul Rehman
Senior Full-Stack .NET Engineer — Mentor at Devsinc

"I had the pleasure of leading Faseeh for almost two years, during which he consistently proved himself as a reliable and ownership-driven full-stack engineer. Whether working in .NET, Angular, React, he quickly adapted, delivered quality work, and showed a strong learning attitude. I confidently recommend Faseeh to any team looking for a committed, capable, and growth-oriented engineer."

MN
Muhammad Nouman Suleman
Senior Full Stack Engineer — Devsinc
Let's Connect

Get In Touch

Available for senior engineering roles, remote positions, and freelance consulting.
Open to relocation — UK, EU, Gulf.

Location

Lahore, Pakistan

Open to Remote & Relocation — UK, EU, Gulf
Email
faseehullahdev@gmail.com
Phone
+92 303 5762662

Ready to discuss your next role or project?

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