Özgür is available for hire
Hire ÖzgürÖzgür Akçalı
Verified Expert in Engineering
Software Developer
Istanbul, Turkey
Toptal member since April 10, 2019
Bio
Since 2011, Özgür's been building web applications—specializing in API development with Python/Django. For the majority of his professional life, he's led technical teams at startups where he took projects from the idea stage to the delivery of functional products while setting up workflows with best practices along the way. Özgür enjoys working with teams and is looking for opportunities where he can tackle problems that come with scale.
Portfolio
AXI AI
Software Testing, Celery, Git, Docker, Google Cloud Platform (GCP), TypeScript...
Solidus
Software Testing, NGINX, Cryptocurrency APIs, Celery, Git, Redux, Docker, Redis...
Gelgit
NGINX, Celery, Git, PostgreSQL, Amazon Web Services (AWS), Google Maps API...
Experience
- Python - 10 years
- Amazon Web Services (AWS) - 9 years
- Django - 9 years
- Celery - 8 years
- Django REST Framework - 5 years
- Angular - 3 years
- Flask - 1 year
- Google Cloud Platform (GCP) - 1 year
Availability
Part-time
Preferred Environment
Git, PyCharm, Windows
The most amazing...
...thing I've built is an online central music player that enables a user to play tracks from several music sources on a single player.
Work Experience
Full-stack Web Engineer
2019 - 2019
AXI AI
- Built a module in Django that extracts big data from various sources and dumps into Google BigQuery.
- Constructed a wrapper API in Flask that runs machine learcning algorithms on data stored in Google BigQuery.
- Developed a client application with Angular that interacts with several APIs to enable users to perform data-intensive operations on data stored in multiple providers.
Technologies: Software Testing, Celery, Git, Docker, Google Cloud Platform (GCP), TypeScript, Protractor, Jasmine, CSS, JavaScript, Python, Angular, Flask, Django
Full-stack Web Engineer
2017 - 2018
Solidus
- Implemented a mechanism to calculate the average prices of cryptocurrencies in real time, using WebSocket data from multiple cryptocurrency markets' APIs.
- Built a mechanism to keep user balances in multiple crypto and fiat currencies in a fault-proof way.
- Set up an auto-balanced, Docker-based server network on AWS.
- Created a wrapper around multiple cryptocurrency markets' APIs to interact with them through a single interface in Java.
- Solved performance issues in real time cryptocurrency price tracking by using an AVL-tree based data structure to keep live order data.
- Developed a microservice in Flask that connects to third-party APIs to convert values between fiat and cryptocurrencies.
Technologies: Software Testing, NGINX, Cryptocurrency APIs, Celery, Git, Redux, Docker, Redis, PostgreSQL, TypeScript, Django Channels, Agile Software Development, Amazon Web Services (AWS), Linux, JavaScript, CSS, Python, React, Flask, Java, Django REST Framework, Django
Back-end Engineer
2016 - 2017
Gelgit
- Implemented a mechanism to match drivers with riders in real time for an on-demand point-to-point transportation service.
- Developed a mechanism to detect possible unfulfillment of prearranged trips, and schedule another driver.
- Updated data-model structures to solve performance issues in trip cost calculations that came with scale.
- Created a mechanism to tolerate possible GPS-related errors in distance calculations by outlier detection and removal.
Technologies: NGINX, Celery, Git, PostgreSQL, Amazon Web Services (AWS), Google Maps API, Linux, Python, Django REST Framework, Django
Back-end Engineer
2015 - 2016
Kunduz
- Developed a mechanism to engage, in real time, students with available teachers (who are teaching the specified subject).
- Implemented a multilayered paid package structure, managing recurring payments through credit card app store and play store payment options.
- Wrote an algorithm to find similar items among user-generated content which were test questions posted by students.
Technologies: Software Testing, NGINX, Celery, Git, MySQL, Agile Software Development, Amazon Web Services (AWS), Linux, Python, Django REST Framework, Django
Full-stack Web Engineer
2015 - 2016
Pointr
- Utilized cloud beacons to estimate the real-time number of visitors at offline venues by using phone-based WiFi signals.
- Developed a cache-based reporting service, reducing the execution times of tasks that previously took around 30 seconds to under 1 second.
- Migrated a Django-based analytics back-end to .NET.
Technologies: Git, Agile Software Development, CSS, JavaScript, Backbone.js, .NET, Django
Co-founder | CTO
2011 - 2015
Cubic.fm
- Developed a central music player that can play tracks from several online sources; this player was integrated into a Backbone.js web client.
- Wrote an algorithm to match musical works across multiple music-streaming services.
- Created an algorithm to generate theme-based playlists.
- Implemented an algorithm to find the correct version of a specific musical work on YouTube with an over 90% success rate.
Technologies: Spotify API, Celery, Git, MySQL, Amazon Web Services (AWS), SoundCloud API, Deezer API, YouTube API, CSS, JavaScript, Python, Backbone.js, Django
Co-founder | CTO
2011 - 2012
Evarkadasi.co
- Developed a location-based search mechanism for rooms/roommates.
- Implemented a paid user structure with a PayPal integration.
- Wrote an algorithm to suggest ads to users depending on their preferences by calculating a relevancy score.
Technologies: NGINX, Git, PostgreSQL, Google Maps API, CSS, JavaScript, Python, Django
Experience
Cubic.fm
An online music service that enables users to add tracks to their collection from various sources—such as Spotify, Deezer, YouTube, SoundCloud, Rdio, and more—and play all these tracks through a central music player.
Solidus
A cryptocurrency investment platform that combines several cryptocurrencies by themes and lets its users invest in these themes. All of the themes are auto balanced during fixed periods and these are reflected in the users' portfolios automatically.
Kunduz
https://kunduz.com/A mobile application that enables students to get real-time help from teachers for problems they can't solve. It is among the graduates of Y Combinator's 2018 summer batch.
Gelgit
A point-to-point on-demand transportation service, enabling its users to find transportation in real time or arrange a trip for a future date.
Education
2007 - 2013
Bachelor's Degree in Computer Engineering
Boğaziçi University - Istanbul, Turkey
2011 - 2011
Exchange Student in Computer Engineering
École Polytechnique Fédérale de Lausanne - Lausanne, Switzerland
Skills
Libraries/APIs
YouTube API, Spotify API, Deezer API, SoundCloud API, Google Maps API, React, Backbone.js
Tools
Celery, NGINX, PyCharm, Git
Languages
Python, JavaScript, CSS, TypeScript, Java, C++
Frameworks
Django, Django REST Framework, Flask, Angular, Django Channels, Jasmine, Protractor, .NET, Redux
Paradigms
Agile Software Development, Software Testing
Platforms
Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Linux, Windows
Storage
PostgreSQL, MySQL, Redis
Other
Cryptocurrency APIs
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