Muhammed Erin

I maintained the legacy Wizlo loyalty platform end‑to‑end (DevOps + production support) and co‑built the next‑generation Loyalty suite in a cross‑functional Scrum team. My focus: resilient multi‑tenant architecture, high‑quality code, and rapid feature delivery that kept 14 restaurant tenants—each with ≈ 10 K customers—running smoothly.
Wizlo’nun bakımını üstlenirken aynı zamanda yeni Loyalty paketini Scrum ekibiyle geliştirdim; hedefim ölçeklenebilir çoklu‑tenant mimarileri, yüksek kod kalitesi ve hızlı teslimattı.

Wizlo (Legacy)

• Sole owner of CI/CD, infra and production hot‑fixes on a .NET Framework, Event Store, Hangfire stack deployed via Azure DevOps (5 nodes).• Closed critical security gaps and resolved long‑standing incidents, restoring 24 / 7 stability.• Handled multi‑tenant domain resolution & rapid‑log analysis for proactive issue response.

• Designed and implemented a modern multi‑schema architecture (.NET 9 + PostgreSQL Jsonb + CQRS/MediatR, AWS SNS/SQS) across Enterprise ➜ Tenant ➜ Branch hierarchy.• Introduced integration‑test framework; boosted unit‑test coverage 20 % → 58 %, enterprise layer → 77 %.• Kept SonarQube maintainability & reliability = 0 and code smells ≤ 25; average PR review time ≈ 15 min (peer + AI).• Built DB‑free campaign code generator, dynamic segmentation engine, and an RL proof‑of‑concept for churn prediction.• Active in sprint planning, refinement, review, retros; paired with newcomers to accelerate onboarding and safeguarded technical direction after leadership turnover.

Technologies / Teknolojiler: .NET Framework / .NET 9 · Clean Architecture · DDD · CQRS (MediatR) · Multi‑Tenant Schemas · Event Store · Hangfire · Azure DevOps CI/CD · AWS SNS/SQS · PostgreSQL Jsonb · MS SQL · xUnit / BDD · SonarQube · GitLab MR + AI Code Review

• Modernised Seç Market Yeni Portal (B2B e‑commerce) supporting > 2 500 stores; closed ~600 security findings & Code Quality items in initial sprints.
  Seç Market portalını 2 500+ mağaza için modernize ettim; ilk sprintlerde 600 civarı güvenlik ve kalite maddesini çözdüm.
• Introduced CQRS and refactored tightly‑coupled services, reducing page latency and improving maintainability.
  Hizmet bağımlılıklarını ayrıştırıp CQRS getirerek performansı yükselttim.
• Actively contributed to two‑week Scrum sprints: security hardening → code quality → new feature delivery.
• Tech: .NET Core, Oracle, EF Core, Clean Architecture, CQRS, RabbitMQ, Docker, Kubernetes, React/Redux, Hangfire.

• Added features and performed code reviews for Flo Link (B2B ordering), IAM Hub and Neon apps; Kanban workflow.
• Authored reusable Clean Architecture template to standardise future projects; proposed DDD adoption to cut dev cost.
• Left following strategic outsourcing shift.
• Tech: .NET 6, .NET Core API & MVC, DDD, CQRS, EF Core, AutoMapper, AutoFac, Angular.

• Delivered new features to FleetUp CRM (VDF) within bi‑weekly Scrum sprints.
• Member of Software Architecture Club: ran workshops, disseminated best practices across teams.
• Tech: .NET MVC & Web API, MSSQL, Elasticsearch, RabbitMQ, MassTransit, Angular, Event Storming.

• Piloted migration of legacy OSS to .NET Core DDD; rebuilt Customer, CCO and other apps.
• Co‑engineered Zero‑Touch Provisioning system (modem auto‑config); added Error/DeadLetter Queues, Retry & Circuit Breaker for resilience.
• Contributed across Corporate, Network & OSS teams in bi‑weekly Scrum.
• Tech: .NET Core, WPF, Selenium, WCF, RabbitMQ, React, EF Core, CQRS.

• Optimised proprietary Lena AI Engine; built Windows Forms demo on .NET Core 3.0 preview.
• Developed REST integration service & enhanced SitePluss client project; trained new hires.
• Tech: .NET Core, MVC, Web API, Angular, Dapper, ML.NET.

• Contributed to confidential government project: developed N‑tier .NET MVC modules, Web API & WCF services.
• Tech: .NET MVC, Web API, SQL Server, Angular, Bootstrap.

• Provided technical support for trainers on Learning Management Systems and online education tools.
• Assisted with troubleshooting courseware delivery issues and performed routine system maintenance.

Worked within a 5‑person team using Waterfall methodology to build multiple desktop and web applications from scratch: