Cem Mutlu
Software Engineer at Stripe
Software developer with thorough hands-on experince in all levels of development,
including performance, analysis, back-end and front-end development. I am a supportive enthusiastic team member and always exited about new challenges.
Experience
Software Engineer
Stripe · Permanent Full-time
Dec 2024 - Present · a year and 10 months
Toronto, Ontario, Canada
- Built scalable, testable and maintainable systems supporting millions of active subscriptions.
- Designed and implemented core components of Stripe's new subscription billing engine, ensuring accurate and flexible recurring payment calculations across diverse use cases.
- Collaborated with cross-functional teams to integrate the new billing engine into existing payment flows, maintaining backward compatibility and high reliability.
- MongoDB
- Ruby
Software Development Engineer
Amazon · Permanent Full-time
Nov 2020 - Dec 2024 · 4 years and 2 months
Toronto, Ontario, Canada
- Developed and maintained a customized operating system used across Amazon’s internal environment to secure customer data during customer service interactions
- Worked on a system that evaluates the security posture of websites accessed through the operating system
- Developed automated systems for tracking, triaging, and patching security vulnerabilities leveraging GenAI
- Built an extension deployment system to streamline rollout and management of internal tools
- Developed and optimized a data pipeline processing 100+ GB/day of telemetry data for analytics and monitoring
- Amazon Bedrock
- Amazon Dynamodb
- Amazon Web Services (AWS)
- AWS CloudFormation
- AWS Lambda
- Elasticsearch
- Java
- NoSQL
- Python
Back End Developer
Hack and Craft · Self-employed
Jan 2020 - Oct 2020 · 10 months
United Kingdom
- Redesigned a large-scale supply chain ERP system, introducing dynamic record grouping and filtering that improved usability and decision-making for complex workflows.
- Collaborated with QA and design teams to refine user experience and ensure reliable, high-quality releases
- .NET Core
- Angular
- Azure
- C#
- Entity Framework
- F#
- SQL
Software Development Team Lead
Apsiyon · Permanent Full-time
Sep 2016 - Dec 2019 · 3 years and 4 months
Istanbul, Türkiye
- Led a team of 5 devs to design and deliver Apsis, a new lightweight version of Apsiyon’s main property management platform, built from the ground up to serve clients with simpler operational needs.
- Designed and implemented a centralized authentication platform using OAuth2, supporting advanced scenarios such as invitation-based onboarding. Migrated all company projects to the new system, enabling consistent and secure login across products for over 100,000 active users.
- Redesigned and delivered time tracking and payroll modules, enabling accurate employee attendance and payroll processing for enterprise clients.
- .NET Core
- Angular
- ASP.NET MVC
- Entity Framework
- Redis
Pinnera
Permanent Full-time · 2 years and 10 months
Istanbul, Türkiye
Lead Software Developer
Jul 2015 - Sep 2016
· a year and 3 months
- Led the development team and offered guidance and mentorship to team members.
- Created a real-time messaging tool that is used in B2B projects, from design to implementation.
- Oversaw the entire development process of multiple small-scale projects from start to finish.
- ASP.NET MVC
- C#
- Entity Framework
- SQL
- WinForms
Software Developer
Dec 2013 - Jul 2015
· a year and 8 months
- Developed the Pinnera Analyzer, a web-based data mining tool for small and medium-sized enterprises, and implemented advanced algorithms such as Artificial Neural Networks, Genetic Algorithms, Decision Tree Learning, and multiple Clustering Algorithms to enhance its functionality.
- Created a web-based ERP tool for factories, catering to the unique needs of the manufacturing industry.
- Quickly prototyped new features to ensure their practicality and effectiveness before full implementation.
- C#
- Entity Framework
- SQL
- WinForms
Education
