Bahadır Gezer

TomTom · location technology and digital mapping Ghent, Belgium

Software Engineer II 2026-03 – present

Software Engineer I 2024-12 – 2026-03

• Owned lane-level restrictions end to end in Scala, Spark and Databricks: bus, carpool, truck and taxi lanes, shipped to major carmakers.
• Built a lane-to-road derivation pipeline; its first use put road gradient into EV routing in 80 countries.
• Split lane restrictions out of a legacy layer: proved the new layer's quality, then moved every consumer across.
• Runner-up in TomTom's company-wide hackathon: a working bike-lane layer in 24 hours, pitched to the executive board.

Şikayetvar · Türkiye's leading consumer-complaints platform Ankara, Türkiye

Back-end developer · part-time until 2023-06 2023-02 – 2024-11

• Worked on a Java and Spring microservice platform serving 12M users and 55M monthly visits.
• Led AI integration into complaint evaluation, one of the company's first.
• Optimised MySQL queries over 30M+ complaints; integrated a call-centre system and automated complaint resolution.
• Brought production NullPointerExceptions to zero, and kept them there for nearly two years.

Back-end developer (intern) 2022-06 – 2022-09

• Summer internship on the same back-end team.

Techsign · identity-verification start-up Istanbul, Türkiye

Front-end developer (intern) 2024-06 – 2024-07

• Built an end-to-end test suite for a React front end with Cypress.

Boğaziçi University Istanbul, Türkiye

Teaching assistant · part-time 2022-03 – 2023-06

• Assisted three computer-engineering courses: object-oriented programming, algorithms and data structures, and systems programming.
• Designed programming assignments in Java and C, wrote their specifications, ran problem sessions and maintained the automated grading.

CmpE 160 assignments · CmpE 250 project 1 · CmpE 250 project 3

Leext · HR-tech start-up, run alongside the jobs above

Co-founder, back-end lead 2022-10 – 2025-01

• One of three co-founders. Built the entire back end (Java, Spring Boot, PostgreSQL) of an applicant-tracking platform covering hiring from job posting to offer.
• Implemented subscription billing through an external payment provider, and sped up the platform by optimising critical database queries.
• Had paying customers but could not grow; the company has since closed.

Kalamış Yelken Kulübü Istanbul, Türkiye

Sailing instructor 2023-02 – 2024-07

• Taught beginner and intermediate sailors on weekends, alongside full-time work; responsible for on-water safety, drill design and progression.

Boğaziçi Sailing Team Istanbul, Türkiye

Captain 2023-08 – 2024-04

• Led a race team of more than 70 students; organised races and training, and secured the team's funding. Skippered its return to the Campus Cup, an inter-university yacht race, after three years away.

Boğaziçi University Istanbul, Türkiye

B.S. Computer Engineering · GPA 3.20 / 4.00 2020 – 2024

• Sabancı Foundation scholar for the whole degree: a merit scholarship awarded for placing in the top 0.006% of Türkiye's national university entrance exam.
• Graduation project: Social Synapse, a live Reddit pipeline that scored sentiment and linked the people and brands it found to Wikipedia; about 2M texts and 150k distinct entities, built with one teammate. code