Software Engineer Senior

Serdar Vayni

**** **** **. *** *****, CA ***** 619-***-**** ******.***@*****.*** linkedin.com/in/wayni Senior Full-Stack & Backend Developer with 16+ years of experience designing and developing scalable, high-performance enterprise applications. Proven expertise in .NET Core, C#, Python, Node.js, React, and Microservices architecture. Hands-on experience with DevOps tools, CI/CD pipelines, containerization (Docker, Kubernetes), and cloud platforms (Azure). Strong background in SQL/NoSQL databases including Oracle, PostgreSQL, MongoDB, Redis, and MS SQL Server. Authorized to work in the U.S. and open to on-site or remote opportunities.

PROFESSIONAL EXPERIENCE

PLUXEE,

Full Stack Engineer

(Remote) Turkiye

May 2020–Present

● Built scalable CMS and 20+ reusable React components

● Integrated multilingual support using MongoDB and i18n

● Designed standardized logging and dynamic Webhook architecture

● Applied CQRS and middleware patterns for backend improvements PARAQR,

Software Architect

(Remote) Turkiye

Jun 2024–Jan 2025

● Migrated legacy monolith to .NET Core Microservices on Azure

● Designed dynamic scaling infrastructure, cutting cloud costs by 60%

● Optimized DB performance and app response time by 30% DOMINOS

Full Stack Engineer / DevOps Consultant

(Remote) Turkiye

Apr 2019–Dec 2019

● Rebuilt loyalty platform with ASP.NET Core Microservices

● Integrated Redis, Elasticsearch, and Azure Kubernetes Services

● Led DevOps practices and full documentation transfer KETCHUP LOYALTY MARKETING

Team Lead – Senior Software Engineer

(Onside) Turkiye

May 2015–Mar 2019

● Led team and architecture of loyalty-based mobile backend

● Improved delivery speed with Agile/Kanban methodology

● Reduced infrastructure costs with accurate Azure scaling estimations HURRIYET

Senior Software Engineer

(Onside) Turkiye

Jan 2014–Apr 2015

● Built dynamic, non-technical user-controlled forms with ASP.NET MVC

● Integrated Elasticsearch for advanced querying/reporting TRENDYOL.COM

Senior Software Engineer

(Onside) Turkiye

Oct 2012–Jan 2014

● Led migration to ASP.NET MVC 3, improved DB performance by 35%

● Introduced automated testing infrastructure

VERISOFT

Senior Software Engineer

(Onside) Turkiye

Feb 2011–Oct 2012

● Developed bank EMV UI, awarded for performance

● Delivered loyalty system using Oracle and MS SQL BEYCON

Software Engineer

(Onside) Turkiye

Mar 2010–Feb 2011

● Developed and integrated dynamic jQuery components.

● Utilized AJAX and asynchronous data loading to update content. GOZEN HOLDING

Software Engineer

(Onside) Turkiye

Aug 2008–Aug 2009

● Developed and integrated dynamic jQuery components.

● Utilized AJAX and asynchronous data loading to update content. EDUCATION

SELCUK UNIVERSITY

Bachelor of Computer Science,

Konya, Turkiye

Sep 2003-July 2008

ADDITIONAL SKILLS

● Languages: C#, Python, JavaScript (Node.js), TypeScript, SQL Frontend: React.js, HTML5, CSS3

● Backend: ASP.NET Core, Express.js, REST APIs, Webhooks

● Databases: Oracle, MS SQL Server, PostgreSQL, MongoDB, Redis

● DevOps & Cloud: Azure, Docker, Kubernetes, GitHub Actions, CI/CD, Linux

● Tools: Git, Jira, Agile (Scrum/Kanban), Swagger, Postman

● Architectures: Microservices, Event-Driven Systems, CQRS, DDD

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