Mustafa K.

Mustafa K.

Fullstack Developer

Top performer 9.3/10
Turkey
Trusted member since 2022
10 years of experience

He is known for his commitment to clean, high-quality code and consistently applies best practices such as SOLID, DRY, and KISS to ensure maintainability and performance. His focused and precise approach to problem-solving has made him a trusted contributor across engineering teams.

Mustafa has been described by a Proxify client as “a superb technical resource,” valued for his strong work ethic, commitment to quality, and collaborative mindset. He delivers results efficiently and is highly regarded as a positive and reliable team member.

Main expertise

C#C#10 years
.NET.NET10 years
ASP.NETASP.NET4 years
SQLSQL10 years
15+

Experience4

Sabbatical

-

Sabbatical
Mental Health and Wellness
Jul 2023 · 3y
  • Took a sabbatical after a long uninterrupted professional career to focus on wellbeing, personal interests, travel, and learning new software development technologies
  • Focused on modern software engineering practices and self-directed learning, particularly in Flutter and .NET microservices architecture
  • Built two proof-of-concept applications using Flutter to explore modern cross-platform mobile development
  • Completed an extensive .NET 8 microservices training program (Udemy), covering: Microservice architecture patterns (Vertical Slice, Clean Architecture, CQRS, DDD) SQL and NoSQL databases (PostgreSQL, SQLite, SQL Server) Distributed caching with Redis Asynchronous messaging (RabbitMQ) and synchronous communication (gRPC) API Gateway implementation using YARP Reverse Proxy Containerization with Docker and Docker Compose
DockerDocker
PostgreSQLPostgreSQL
RedisRedis
FlutterFlutter
MSSQLMSSQL
9+

Senior Software Engineer

Dayshape (via Proxify)
Human Resources
Oct 2022 - Jul 2023 · 9m
  • Contributed to rewriting a legacy reporting module into a separate, high-performance service using .NET/.NET Core and SQL Server
  • Built a new reporting backend service communicating with the core system via Azure API Gateway, applying test-driven development practices
  • Developed an adapter layer to support a smooth transition from the legacy reporting system
  • Implemented unit and integration tests using xUnit and Cypress to ensure reliability and stability
  • Performed performance testing, achieving up to 10× improvement compared to the legacy system
  • Maintained CI/CD pipelines for nightly builds and test environments in Azure
  • Created and maintained both external API documentation for customers and internal technical documentation for developers
  • Participated in team planning and workload coordination for upcoming development tasks
MSSQLMSSQL
C#C#
SQLSQL
AzureAzure
Entity FrameworkEntity Framework
5+
Alterna CX

Senior Software Developer, Junior Solution Architect

Alterna CX
Customer Relationship Management (CRM)
Sep 2020 - Oct 2022 · 2y 1m
  • Worked at Alterna CX as a Senior Software Developer and Junior Solution Architect, contributing to architectural decisions and full-stack product development
  • Developed a customer experience platform for multi-channel survey distribution, text analytics, alerting, and reporting, used across banking, retail, insurance, automotive, and e-commerce industries
  • Built and maintained backend systems using .NET Framework and later migrated to .NET 5, applying CQRS architecture and working with SQL Server, Entity Framework, Apache Solr, and Redis
  • Implemented background processing and scheduling using Hangfire and .NET hosted services
  • Integrated third-party services including Slack, Google Translation API, Zapier, and Salesforce to extend platform capabilities
  • Contributed to frontend modernization by migrating AmpersandJS to Vue.js 2 and maintaining legacy components where needed
Vue.jsVue.js
MongoDBMongoDB
RedisRedis
MSSQLMSSQL
C#C#
8+

Software Developer

Koddit
Entertainment and Media
Aug 2019 - Sep 2020 · 1y 1m
  • Worked at Koddit as a Solution Architect and Software Consultant, overseeing the development of a workflow management and low-code application platform
  • Designed and contributed to a low-code system enabling users to build business applications through a visual flow-based interface
  • Developed backend and frontend components using .NET Core, Entity Framework, ASP.NET MVC, Windows Forms, and Microsoft Dynamics 365 integration
  • Built RESTful APIs connecting desktop and web applications within the workflow platform
  • Supported active production use of the platform by two enterprise clients at the time of departure
  • Developed a cross-platform mobile application (Xamarin.Forms) for live public camera streaming across the United States (iOS and Android)
  • Built the supporting .NET Core REST API backend for the mobile application
MySQLMySQL
MSSQLMSSQL
C#C#
SQLSQL
.NET.NET
6+

Assessments

Engineering excellence

Mustafa’s overall performance in a 90-minute live technical assessment ranks in the top 5% of vetted Fullstack Developers at Proxify.

Education

Yildiz Technical University
Yildiz Technical University
Computer Science2009 - 2013

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