Ömer D.

Principal Software Engineer

Istanbul, Istanbul, Türkiye

About

Seasoned Software Engineer with over 11 years of experience in managing, developing, and deploying high-quality software solutions. Contributed to dozens of projects serving millions of users, demonstrating a strong ability to deliver robust and scalable applications. Skilled in managing and mentoring teams of up to 15 people, fostering innovation, and driving technical excellence. Experienced in leveraging technology to solve complex problems and enhance user experiences. Get in touch at [email protected]

Experience

  • Senior Software Engineer at Ziraat Teknoloji
    Feb 2025 - Present · 1 yr 6 mos

    Led the architectural transition of digital wallet app to a modular monolith

  • Principal Engineer at fucimo
    Jul 2023 - Dec 2024 · 1 yr 6 mos

    At Fucimo (raised $400K in pre-seed round), we developed multi-channel ads marketplace. - Led the creation of a real-time, map-based filtering system for 7k+ marketing assets using React, Remix, and Elasticsearch, improving asset discovery by 35%. - Leveraged Remix to boost render speed by 2.3x and reduce API complexity, with Tailwind enhancing UI consistency. - Spearheaded the development of an 'inbox for offers' feature with Node.js, PostgreSQL, and TypeORM enabling the tracking of mission progress between buyers and sellers, and enhancing overall user satisfaction and engagement. - Engineered a Fiverr-inspired proposal module with React, Redux, shadcn/ui, and in-app messaging, elevating the buyer/seller transaction experience within the platform.

  • Co-Founder at Dailect
    Mar 2022 - Jul 2023 · 1 yr 5 mos

    At Dailect (raised $80k in angel investment), I co-founded and developed a robust web scraper infrastructure that efficiently handles 1M+ web pages daily. - Built and optimized a distributed scraper with Node.js, Kubernetes, Docker, and NATS, processing 1M+ web pages daily. - Implemented retrieval-augmented generation using Elasticsearch to process and analyze over 40 million user reviews, enhancing data accuracy and insights. - Constructed a Node.js thread pool executor, boosting web scraping performance by 4x and ensuring availability and failover. - Crafted a dashboard using Next.js and Prisma, enabling data analysis and insights for 10k+ user reviews per brand.

  • Markakod Reklam Tasarım ve Yazılım Hizmetleri (7 yrs 1 mo)
    • Chief Technology Officer
      Sep 2019 - Jul 2022 · 2 yrs 11 mos

      As CTO at Markakod, - Reduced infrastructure costs by 48% through a multi-tenant Kubernetes architecture with cost attribution (~84% accuracy), leveraging Grafana and Prometheus for real-time monitoring and cost analysis, optimizing resource allocation and improving visibility into cluster performance. - Built and led a React Native team, reducing mobile development costs and delivering three mobile apps. - Led the development of a high-growth project for Nutella, which reached over 1.4M users with 300k+ monthly active users. - Architected a cost-efficient, highly available MongoDB cluster, securely managing over 900,000 transactions and more than 80 million documents with a 99.99% uptime. - Spearheaded the digital transformation of Aselsan, a top defense company, overhauling legacy systems. - Developed a Periodic Reconciliation job on the balance table, ensuring data consistency and reliability across transactions. - Used digital signatures to authenticate user transactions, boosting security and preventing vulnerabilities.

    • Staff Software Engineer
      Aug 2018 - Aug 2019 · 1 yr 1 mo

      - Developed scalable systems for Ingage.media, managing over 11,000 products and 300,000 media plans with high-performance RESTful services. Created a plugin-based architecture and integrated Auth0 for secure authentication. - Built a React-based CMS and a scalable NestJS framework for the Loyalty SaaS platform, saving 456 hours per project and supporting millions of users across major brands. - Supercharged query performance by leveraging stored procedures, reducing network traffic data transfer size by 96% and accelerating complex queries for enhanced system efficiency.

    • Back End Developer
      Jul 2015 - Aug 2018 · 3 yrs 2 mos

      - Developed and managed all payment processes for a second-hand shopping app using Backbone.js and Node.js, ensuring seamless transactions and user experience. - Assembled a multi-directional API with WebSocket support and robust JWT authorization middleware at Layer 7.

  • Big Data Analyst at Kocaeli University
    Jul 2014 - Jun 2015 · 1 yr

    Analysis and scientific research over big data with Hadoop and Hive