Tolga Evcimen

A C# console application designed to apply a lowpass filter to images, resulting in a visually appealing blurred effect. The application allows users to experiment with picture blurring using different window sizes.

This console application uses a straightforward approach to blur images. By specifying the picture path and window sizes for blurring, users can run the code and generate a new blurred picture. The application does not include production-ready features such as exception handling or performance optimizations. It was developed as a fun, one-night-stand project to create a simple image-blurring application.

A project management system I designed and developed for internal use in the company I worked for as a junior developer.

It was built for managing Waterfall projects. Projects can be separated into many nested submodules, and each module can be assigned to teams and developers with specific deadlines and milestones. Every project piece also accepted all kinds of documentation to work on. Later on, the solution also integrated announcement and chat modules.

An enterprise file-sharing (EFS) solution I've worked on as a lead engineer from its conception for four years.

The EFS was a SaaS solution marketed to corporate clients. It encompassed web, native iOS, Android mobile, and desktop client applications. Its primary objective was to empower clients to seamlessly integrate and manage their users through LDAP, Active Directory, or our dedicated administrative endpoint.

The EFS provided end users with a plethora of modern features that were a delight to develop. These included selective sync, real-time file synchronization, delta sync, P2P synchronization for local neighbor clients, deduplication, and version history operations.

A route optimization project I undertook for one of the biggest shipping companies in Turkey, Yurtiçi Kargo. I've handled its design phase.

We developed a convex hull heuristic with capacity and 2-opt and 3-opt optimization algorithms. The heuristic aimed to increase the efficiency of cargo trucks' daily routes. Trucks had volume capacities, constrained working hours, and legally allowed working area borders. We then managed to increase the efficiency by an average of 33% for a relatively large branch in İzmir with three months of historical data. Unfortunately, the project was never launched due to business conflicts.

An online exam platform I designed and developed for a local education consultancy firm as a freelance developer.

Registered branches of the main office could use the platform. Each branch could register new students with the codes provided by the main office. The administrative branches were able to create a variety of tests. The supported test types were regular tests with a time limit for the whole test, memory tests with text or image items to memorize for some time, multiple time-boxed questions for each item, and Likert scale tests. After the tests were created, registered students were given these exams according to the improvement path they bought and their age group. After a certain period upon completing each exam, a higher level test was presented to the student to monitor their improvements.

Another enterprise file-sharing (EFS) solution to which I've contributed as a lead engineer, working through the design and development phases.

This version was an on-premise solution marketed to corporate clients with their own data centers and file systems. Unlike the SaaS mentioned above, it lacks a desktop application as all the end users were in the intranet and used the existing file system. Integrated with the NTFS and NetApp, the web and mobile applications worked on top of the existing file system, utilizing all existing functionalities, such as permissions and snapshot operations. According to the rules defined by the administrative users, users could share files and folders outside the company via shareable online links. Also, administrative users could see and generate usage and sharing reports for all users, which was a well-received feature by official institutions.

For me, the most fun feature it had was an online document editing tool where users could collaborate on the shared office documents in real time.

A project developed for Unilever Food Solutions (UFS), in which I worked as part of an agile and remote team.

We handled the entire development process of UFS, from its back office to the B2B webshop. Leveraging the robust CMS platform Adobe Experience Manager, I played a pivotal role in developing new components and ensuring the smooth operation of existing functionalities as part of the innovative UFS team.

Working on this enterprise-level project, which catered to approximately 50 countries, was a delightful experience.

A project related to my wife's master's thesis targeting a web-based remote sensing application to which I've contributed as a graduate student.

I developed a few filtering and clustering algorithms used in remote sensing satellite images, such as low-pass filters, mean filters, median filters, high-pass filters, Laplacian filters, Sobel filters, unsupervised clustering algorithms, and KMeans clustering. Additionally, I developed a user-friendly library to play with band combinations of a satellite image for this project using GDAL.

A project related to my master's thesis in which I designed and developed a distributed self-stabilizing simulator.

Distributed algorithms are hard to design and test since they require many distinct processors to work on. Self-stabilizing ones are even harder as the system has to be alive in real time while some processors are born, and some are dying. In order to ease out the development and testing processes of distributed algorithms, I developed a thread-based self-stabilizing distributed simulator. This tool can either be used for developing or testing new algorithms or going through the execution of an algorithm step-by-step for educational purposes. We also published this work as an academic paper at a local conference.

A project that comprised the investigation of the practical performance measures of all three known distributed self-stabilizing dominating set algorithms using the SELFSIM I developed. The results are published at a local IEEE conference.

A not-yet-published book "Handbook of Research on the IoT, Cloud Computing, and Wireless Network Optimization" I've contributed to. I wrote one of its chapters related to my master's thesis—"Capacitated Graph Theoretical Algorithms for Energy Efficient Wireless Sensor and Ad Hoc Networks."