Sertaç Önal

Engineering Manager

Istanbul, Türkiye

About

I have been leading software teams for the past five years. My top priority is establishing harmonious collaboration within my team and providing an environment for them to work efficiently with high motivation. I have extensive experience in Agile frameworks that aid in the swift and effective execution of projects. Before taking up leadership roles, I contributed as a backend developer in numerous projects. Apart from my professional life, I am a proud parent to a daughter and two cats

Experience

  • Engineering Manager at Trendyol Group

    Led Seller Store team. Oversaw 10 full-stack developers, and QAs, responsible for widgets, CMS screens, and 20+ microservices under high traffic (approx. 2M requests per minute). Established and tracked Golden Keys, OKRs, and KPIs. Offered technical insights for decision-making, promoting skill growth through collaborative initiatives. Reported to the Director and Heads of Technology, closely aligning with the product department for project prioritization and resource management

  • Engineering Manager at Softtech

    Led and managed three teams within Isbank’s overseas banking department, totaling 24 backend developers, analysts, and QAs. Oversaw feature development for European branches and production issue support. Restructured application domains, forming country-specific scrum teams and introducing a maintenance team for expedited issue resolution. Achieved a 40% increase in customer satisfaction. Provided guidance, motivation, and support to ensure team success. Reported directly to the Director and Deputy General Manager, and spearheaded customer/stakeholder meetings for prioritization and backlog management, overseeing resource allocation for team projects and initiatives.

  • Senior Software Engineer at Turk Telekom

    Managed and enhanced Tivibu IPTV interactive applications offering diverse services such as weather updates, live sports scores, and TV program replay. Collaborated closely with Ericsson, the IPTV framework provider, to devise solutions and establish a strategic roadmap within a Scrum team. Pioneered the development of the inaugural application on Tivibu's interactive platform, the Volkswagen App. Proficient in Java, JDBC, SQL, HTML, CSS, JS, Bootstrap, Maven, and Git.

  • Software Team Lead at Softtech

    Contributed to the development of payment functionalities for Isbank's overseas banking department, both as a team member and leader across five backend development teams. Pioneered the adoption of microservices architecture, marking the first transformation within the overseas banking department. Proficient in Java, Microservices, Spring, Spring Boot, Hibernate, SQL, MongoDB, REST, JSP, JS, Maven, JUnit, and Git.

  • Software Engineer at NTT DATA

    Contributed to the development of banking applications in collaborative projects between NTT Data and Yapı Kredi Bank. Spearheaded the formation of the first Scrum team at NTT Data's Turkey Branch. Proficient in Java, SOAP, Hibernate, Oracle, JSP, JS, Maven, and Git.

  • Engineering Manager at Getir

    Directed and managed two teams within the payment tribe at Getir: one focused on reconciliation systems for all payments, and the other on integrating ERP (SAP) with Getir systems. Led a team of 12 backend developers, analysts, and QAs, handling high-load data and traffic. Implemented refactoring and optimizations, reducing task durations from 3 hours to as little as 30 minutes. Successfully eliminated a 20% data loss using microservices patterns. Established and monitored OKRs and KPIs for both teams and individuals, providing guidance, motivation, and support to achieve objectives. Contributed technical expertise to team decisions and facilitated skill development through collaborative initiatives. Reported directly to the Deputy CTO and Co-Founders, collaborating closely with the product department for project prioritization and resource allocation.