Mehdi Saffar Email & Phone Number

Dublin, Ie

Batelle is a modern solution to an age-old problem: getting children to sleep. It is a sleep training program that is based on principles of early childhood development and behavioral change.- Reduced our sleep guides' workload by 40% by setting up a custom GPT-4 bot that automatically responds to customers.- Simplified cloud management and orchestration by migrating core parts of our infrastructure to Terraform.- Expanded our data analytics capabilities by setting up ETL from Firestore to BigQuery to use more powerful and expressive queries.- Accelerated continuous integration (CI) fourfold by parallelizing unit and integration tests written in Jest.- Developed new Nuxt.js features for the support dashboard, aiding sleep guides in handling an increased customer base.- Investigated sleep guides' bug reports thoroughly, typically resolving issues within four hours.- Advocated for the implementation of structured logging in Datadog to enable early detection of bugs.Standardized a unified set of Tailwind UI components, ensuring style consistency and accelerating new component development.

Pointz is an app that generates bike-friendly routes for users based on cyclist feedback.- Mentored a junior team on the required changes to ensure correctness and improve the security and scalability of their app.- Wrote a Python script to evaluate road safety from OpenStreetMap attributes and integrated cyclist feedback into the C++ Valhalla routing engine, delivering the core feature of bike-friendly route suggestions.- Enhanced the PostgreSQL database and used PostGIS geospatial extensions to better align with application requirements and industry standards.- Consolidated two separate databases into one using AWS Database Migration Service (DMS), streamlining data access and querying without any downtime.

Suly is a streaming platform where users can subscribe to their favorite content creators.- Accelerated integration tests by 22 times by replaying recorded requests and inbound webhooks.- Tripled unit test speed by parallelizing and isolating data at the process, database, and Redis levels.- Automated the deployment of Node.js, GraphQL, and PostgreSQL stack to Heroku using GitHub Actions.- Integrated APIs Stripe, Mux, and Sentry to handle payments, video upload, transcoding, and bug tracking.- Enforced code style, linting rules, and passing tests using Git hooks and GitHub Actions.- Built job queue using BullMQ to offload heavy CPU/IO-bound processing.- Implemented video posts feature with view count, like count, nested comments, and promoted content.- Auto-generated GraphQL queries from schemas in tests to reduce code duplication and tedious boilerplate.- Protected webhook processing from identity fraud and replay attacks and ensured the idempotency of duplicate and out-of-order events.

Istanbul, Turkey

Getir is a startup that offers an on‐demand ultrafast grocery and food delivery service.- Developed a machine learning model based on LightGBM to provide a more accurate estimated time of arrival (ETA) of market orders.- Wrote complex SQL queries to fetch all necessary columns across multiple tables in the Amazon Redshift database.- Reduced the preprocessing duration from two hours down to 20 minutes by using proper data structures, vectorization, and parallelism.- Enhanced model accuracy threefold through detailed exploratory data analysis and iteratively refined feature engineering.

Nispetiye Mah., İstanbul Province, Turkey

Tavan provides weather-based individualized clothing recommendations for runners and cyclists.- Designed complex data tables with filtering, sorting, and chart components capable of querying any date range with zoom and pan features.- Built an immersive map interface for visualizing thousands of routes with advanced filtering and lazy querying capabilities.- Integrated it with 3rd-party APIs to download and process user data.- Developed a geo-editor app that displays OpenStreetMap node data on a map with heatmaps, 3D hex grids, and scatterplots, utilizing the deck.gl library.- Created a custom, fine-grained access control system for administrative users.

Beykoz Kundura, İstanbul

Training to prepare students for competitive programming. Participated in Summer 2018 Camp as a Foundation student, later in Winter 2019 as Advanced student, and the 30-week training program as Advanced student. Topics covered: https://tinyurl.com/y4esxcbs

Istanbul, Turkey

- Improved the admin dashboard to easily manage app content and added internationalization.- Made forms more user-friendly with strict validation and autocomplete features.- Built a messaging system between customers and shop owners, using WebSockets.

Boğaziçi Üniversitesi

Taught an 8-week introductory course for Java to an audience of around 60 students. I introduced them to topics such as variables, conditions and loops, recursion, object-oriented principles. The code of each week can be found under github.com/Compec. Main projects are simple games, calculator in terminal, Tower of Hanoi solver, and an introduction to graphics with 2D tiled game called Sokoban.

American Corner Sousse

• Hosted debate sessions every Thursday

Tunisia

Beyond Limits 2.0, in collaboration with Joussourna and American Corner, is AIESEC Hadrument's second edition of the successful cultural and professional project Beyond Limits 1.0 . It's main goal is to help students choose their educational and professional career through a series of leadership workshops that serve to sharpen their soft skills, skills that are most needed in this competitive world.

Topeka, Kansas Area And Rushville, New York

Got a U.S. Government-funded scholarship to spend an academic year in an American High School as an exchange student. Gone to two different schools in two different states: Seaman High School in the fall in Topeka, Kansas and Marcus Whitman High School in the spring in Rushville, New York. Beautiful experience. Enriching and eye-opening.

Bachelor Of Science - Bs, Computer Engineering, 3.5

Applied Computer Networks, Information Retrieval, Machine Learning, Distributed Systems, Linear Algebra & its Applications, Launching.

Turkish Language And Literature, C1

Mathematics

Education record

Activities and Societies: Boys Tennis Team, Theatre

Senior Year

Activities and Societies: Model United NationsAttended Seaman High School as an exchange student for the first semester.