Serhan KIYMAZ

• Responsible from desktop&mobile websites, native applications, backk office systems of a high traffic streaming platform with 50M daily and 250K concurrent users
• Leading 15+ teams and 120+ engineers
• Improved hiring process and lead hiring activities of engineers
• Fostered positive working environment that encouraged innovation, collaboration and accountability and managed end-user needs with functional responsibilities.
• Delegated work to teams of engineers and technicians, distributing responsibilities to maximize useful skills and avoid knowledge gaps.
• Produced executive summaries and informative metrics for progress reports and presentations for senior leadership.
• Reviewed and approved product designs, verifying compatibility with project principles and goals.
• Managed complex system and subsystem design from conception through final production phases.
• Tested newly installed systems, closely monitoring functionality and adherence to operating specifications.
• Started and delivered modernisation projects to build sustainable and maintainable systems such as;
• > Migration of payment platform from a monolith architecture to service oriented architecture
• > Merging multiple frontend codebases to a single responsive frontend with NextJS
• > Refactoring large APIs to simplify them and distribute knowledge and responsibility between engineers
• > Solving critical problems with accounting system which has a significant impact on company revenue
• > Implementing test automation and monitoring to follow performance metrics of production websites

• Responsible from all engineering activities in company which runs 2 high traffic travel/hotel booking websites
• Lead 8 development teams with 70 developers, QA engineers
• Lead 4 product teams and 25 employees
• Lead Devops and Techops teams
• Coordinated third-party vendors and IT teams to seamlessly deliver effective solutions.
• Provided project leadership in dynamic technology-driven environment with multiple priorities.
• Completed and submitted monthly and yearly reports to support executive decision making.

• Directed software engineering and product team's complex project development and functionality objectives for delivering massive replatforming of website and native applications of the largest betting company of country
• Delivered this very big replatforming project in 5 months to meet a legal requirement so company can keep its betting licence
• Excessive hiring activity to grow engineering and IT infrastructure teams by 100%
• Designed enterprise-level technological blueprints and system architectures.
• Completed and submitted monthly and yearly reports to support executive decision making.
• Collaborated with third-party vendors to implement new system.
• Improved software program delivery performance and reliability.
• Briefed executives on technology risks and suggested ways to alleviate concerns about delivery of new system
• Updated all server and network infrastructure for new micro service architecture

Segmentify is one of popular recommendation engines for e-commerce websites.

• Resposible from engineering, infrastructure, technical support and product teams
• Improved existing ML core engine to work on distributed systems
• Reorganised support team
• Implementing department KPIs and employee bonus system linked to KPIs
• Improved IT procedures
• Delivered 2 new products for customers: Personalised email recommendation and push recommendation
• Management of relationships with 3rd parties
• Presented department strategy, goals, achievements to company board and investors
• Decreased yearly budget by 30%

elefant.ro is 2nd largest e-commerce company of Romania.

• Implemented in-store purchasing project from pickup points
• Launched international sites of company
• Delivered cross-border suppy chain project
• Embraced macro-level strategic decisions and micro-level implementation.
• Maintained high-level knowledge of current and emerging technology development and applications.
• Developed and implemented long-term strategic technological blueprint.
• Collaborated with third-party vendors to succeed with critical campaigns and Black Friday
• Completed and submitted monthly and yearly reports to senior management
• Handled client inquiries with exceptional professionalism and enthusiasm.

• Developed and implemented technical application support and information technology policies and procedures that advanced investment needs, outcomes and performance measurements to balance continuous innovation with responsible risk-taking.
• Fostered positive working environment that encouraged innovation, collaboration and accountability and managed end-user needs with functional and security responsibilities.
• Deployed, monitored and maintained software releases and infrastructure
• Performed regular audits and tests of infrastructure and applications.
• Implemented, created and tested disaster recovery and business continuity plans and maintained appropriate back-up system.
• Developed, tracked and controlled information technology operating budgets and cost and benefit analyses for IT spending initiatives.
• Reviewed and assessed architecture design, implementation, testing and deployment needs to identify project requirements and costs.
• Interviewed, hired and trained staff, leading performance reviews and offering constructive feedback.
• Supported implementation of warehouse management system software applications to enable centralized management of tasks.
• Worked closely with management teams to plan, develop and execute technical strategies aligned to company vision.
• Delivered critical projects like redesign of mobile applications, One Click Checkout, Same day delivery
• Launched offline stores

TVYO is one of the biggest VOD and live streaming platform in Turkey

• Reviewed code to check compliance with company coding guidelines.
• Led cross-functional teams of engineers, quality assurance engineers and Type designers in development of products and resolution of product defects.
• Worked with developers to identify and remove software bugs.
• Documented technical workflows and knowledge to educate newly hired employees.
• Led sprint planning, reviews and retrospectives.
• Inspected final products for application uptime, overall performance and ease of use.
• Mentored junior developers and engineers through onboarding process and long-term team contributions.
• Monitored development efforts to maintain high levels of quality control and reduce impact of unforeseen issues.
• Collaborated with senior leadership to define requirements and build projects that achieved or exceeded corporate plans.

• Resposible from 100+ internal/external portal applications
• Technical coordination with 3rd parties
• Identified issues, analyzed information and provided solutions to problems.
• Participated in continuous improvement by generating suggestions, engaging in problem-solving activities to support teamwork.
• Resolved problems, improved operations and provided exceptional service.
• Increased customer satisfaction by resolving issues.
• Proved successful working within tight deadlines and fast-paced atmosphere.
• Improved operations through consistent hard work and dedication.

• Developed server-side logic in Java
• Defined and maintained databases to deliver responsiveness to data client requests.
• Built flexible, reusable code and libraries for future use.
• Resolved scalability problems and addressed security concerns.
• Integrated front-end elements into applications.
• Integrated third-party APIs from external applications into web platforms.

Sahibinden.com is leading classifieds site of Turkey with more than 50M daily visitors.

• Replatforming of site with service oriented architecture
• Resolved architecture, design or verification problems
• Provided input to team lead regarding areas for process and procedural improvement.
• Wrote, reviewed and edited technical document in accordance with template requirements.
• Participated in formal internal design reviews of proposed products and components.
• Developed positive working relationships with stakeholders to effectively coordinate work activities.
• Developed work plans for various personnel roles based on strengths and talents.

• Developed first MMS website MMS Yarat in Turkey for Shubuo (Turkcell) This product is also used by Ukraine Mobile Operator Life
• Developed SMS services for Turkcell and Shubuo (SMS opt-in/opt-out services, Shubuo Gezeglen, Shubuo Boxer etc)
• Developed bulk SMS application tool for Turkcell which was sending more than 5 million SMS daily. Turkcell used this tool for all bulk SMS transports until 2008
• Development Genpa e-commerce site www.genpatech.com
• First 3D Secure implementation in Turkey for Genpa e-commerce site
• Wrote, reviewed and edited technical document in accordance with template requirements.
• Participated in formal internal design reviews of proposed products and components.

Developed one of first open source projects in Turkey.DCP-Portal was one of kind content management system with an easy installation script and theme support.Some main feature were;

• Content add/editing with WYSIWYG Html editor
• Category management
• Search engine
• Member features like favorites, commenting, email notificaitons
• Forum area

DCP-Portal reached 400K downloads globally and stayed in Top 10 PHP scripts on Hotscripts.com for more than 1 year.It built a community all over the world and helped Peron A.S to sign commercial contracts with customers like UNESCO.

Design Studio was built to launch first local news&advertisement portal of Turkey (BagdatCaddesi.net).

Popularity in short time led us to create a local community website; ClubCadde.net with realtime chat between members, interest groups, forum discussions.

Later on ClubCadde.net started organising parties and events for community.