EFE ONIER
<SOFTWARE DEV />

Efe Önier

SR. SOFTWARE DEVELOPER
LINKEDIN ↗

As a Software Developer with extensive experience as a .NET developer since 2012, I am skilled in both technical leadership and team management. I ensure code quality, resolve managerial challenges, and oversee team workflows to achieve successful outcomes.

Process ImprovementMentorshipCritical ThinkingCommunicationAgile Project ManagementDomain Driven SolutionTime ManagementProactive Problem Solving

Kolay Gelsin Logistics Services

Software Development Manager
Oct 2025 – Present
  • Managed a diverse engineering department of 15+ professionals, driving technical excellence and lean development practices.
  • Optimized CI/CD processes and development pipelines, increasing project delivery consistency to 92%.
  • Instituted scalable, evolutionary architecture standards, driving code duplication down from 20% to 4%.
  • Directed the architecture and rollout of a critical logistics platform, supporting 300,000+ daily shipments.

Sendeo Logistics Services

Sr Software Developer / Team Leader
Jan 2022 – Oct 2025
  • Managed the development processes of a team with more than 5 members.
  • Achieved 92% consistency in delivery timelines.
  • Ensured the implementation of code quality standards, reducing code duplication rate from 20% to 4%.
  • Developed a software solution for vehicle load optimization, contributing to the transportation of 300,000+ packages daily.

Global Kapital Group

Sr Software Developer
Jun 2021 – Dec 2021
  • Worked on the reporting part of the infrastructure that enabled trading on the forex platform.
  • Contributed to the preparation of accurate and timely financial reports.
  • Enhanced the speed and accuracy of reports to support financial oversight.

Definex Consulting

Sr Software Developer
Oct 2020 – Jun 2021
  • Created a loyalty product that achieved a 24% survey response rate after sales, with 92% of responses showing customer satisfaction.
  • Delivered focused outsourcing services in project-based teams.
  • Led coding and deployment practices, ensuring high-quality outcomes.

BilgeAdam Consulting

Software Developer
Sep 2016 – Oct 2020
  • Worked as an outsourced dedicated resource at Koç Sistem.
  • Contributed to enhancing and making Ford Otosan's procurement processes more reportable.
  • Rewrote an entire Oracle Forms project in .NET MVC over 3 years, modernizing the system.
  • Migrated the business logic from the database to the code level for better maintainability and scalability.

Probel Software Solutions

Software Developer
Dec 2014 – Sep 2016
  • Participated in transitioning a project from Oracle Forms to .NET MVC for İzmir's municipalities.
  • Contributed to key modules like council, marriage office, human resources and accounting.
  • Created a payroll interface for 2,000+ employees, allowing flexible criteria for custom calculations.
  • Developed an interface integrated with the population registry, reducing document checks from 1 hour to 15 minutes.

Netle Software

Project Specialist
Jan 2014 – Dec 2014

MaviPiksel Software

Junior Software Developer
Jan 2012 – Jan 2014
Languages & Frameworks
C#.NET Frameworks.NET CoreEntity FrameworkObject Oriented Programming
Architecture & Patterns
CQRS PatternRESTful APIUnit TestDomain Driven DesignAgile/Scrum
Databases & Infrastructure
MsSQLOracleTSQLRedisElasticSearchRabbitMQ
Master's Degree in Software Engineering
İzmir Katip Çelebi University
2022
Bachelor's Degree in Business Administration
Anadolu University
2019
Associate Degree in Computer Programming
Süleyman Demirel University
2010
Agile & Scrum Training
ACM
Jan 2022
English B1
Konuşma Kulübü
Dec 2021 – Apr 2022