Enis is currently unavailable
Enis Bayramoğlu
Verified Expert in Engineering
NixOS Developer
Ankara, Turkey
Toptal member since August 8, 2018
Bio
Enis started his career as an electrical engineer, moving through robotics to land in software engineering. He loves developing mobile games, working with data, developing web services, and automating their deployment. A recurring theme in Enis' work is his excitement for using abstract reasoning in order to get the job done.
Portfolio
SlyceData
Haskell, Functional Programming, PostgreSQL, NixOS
Elsen Inc.
PostgreSQL, Haskell
Picus Security
SQLite, NixOS, Haskell
Experience
- Linux - 10 years
- C++ - 10 years
- Git - 6 years
- Functional Programming - 4 years
- Haskell - 3 years
- NixOS - 2 years
- Python - 2 years
- SQLite - 2 years
Preferred Environment
Git, Visual Studio Code (VS Code), Linux
The most amazing...
...C++ metaprogramming library I've built could describe ADTs and processing pipelines for them in a run-time representation polymorphic way.
Work Experience
Principal Haskell Engineer
2021 - 2022
SlyceData
- Joined the company when its data analysis platform with a custom query engine was suffering constant outages due to overload. Completely stabilized it over time via a variety of performance improvements, queuing, and prioritization.
- Implemented a Haskell REPL environment that allowed the domain experts to iterate over their data integration tasks quickly, bringing down the write-compile-debug cycle time from around an hour down to a few seconds.
- Integrated Snowflake and SQL Server as additional data sources for the platform on top of the existing PostgreSQL data source, allowing some data integrations to work in a database-agnostic way.
- Implemented a data import feature that allowed the users to upload their data sets and start using a configuration UI to map the data's schema to the platform while the upload is still ongoing. This involved analyzing the upload stream in flight.
- Implemented a custom CI server for the project that ran per-branch staging deployments containing all the software components and a DB snapshot clone from the mainline development branch. The service offered a react-based UI for managing deployments.
- Helped the domain experts optimize their SQL queries countless times, sometimes yielding orders of magnitude performance improvements.
- Implemented a robust and flexible queuing and scheduling system tailor-made for the platform on top of PostgreSQL LISTEN/NOTIFY and explicit locking supporting progress tracking, quotas, prioritization, and cancellation.
- Rearchitected the platform to a set of independent services that can all be run as threads in a single process or as separate processes, allowing great flexibility in staging and on-prem deployments.
- Implemented a Nix-inspired fully declarative database schema management DSL in Haskell, allowing the domain experts to declare database objects and deploy them side by side into the same database, sharing common dependencies transparently.
Technologies: Haskell, Functional Programming, PostgreSQL, NixOS
Back-end Developer
2018 - 2018
Elsen Inc.
- Added new language features to the client's proprietary scripting language (Warp).
- Identified and fixed bugs in the core Warp interpreter and its consumers.
- Optimized the Warp interpreter in terms of memory, CPU and IO consumption via algorithmic improvements, parallelism and transparent caching.
- Implemented web endpoints to expose new functionality to the web client.
- Optimized SQL schemas and queries to reduce DB storage and processing resources.
- Improved code organization to reduce compile times and development iteration delays.
Technologies: PostgreSQL, Haskell
Lead Back-end Developer
2017 - 2018
Picus Security
- Worked at the back-end (Haskell) to develop features for the flagship product.
- Maintained the build, test, and deployment automation using Nix.
- On-boarded new team members to Haskell, Nix, and the codebase.
- Participated in the product and software architecture design process to ensure coherence and sustainability.
- Performed code reviews.
Technologies: SQLite, NixOS, Haskell
Data Scientist/Engineer
2015 - 2017
Onedio.com
- Developed probabilistic models for user behavior.
- Implemented the data collection and processing infrastructure, first with Python and PostgreSQL then with C++ and Kafka.
- Developed a C++ compile-time infrastructure to describe event types (as ADTs) and processing pipelines for them in a run-time representation polymorphic way (Structure of arrays vs. array of structures, Church encoding etc.).
- Used the custom infrastructure to implement business logic performing useful queries.
- Worked on a one-off project involving face recognition using the Caffe framework.
Technologies: Caffe, Haskell, PostgreSQL, Apache Kafka, Python, C++
R&D Engineer
2013 - 2014
Aselsan
- Developed real-time control software for remote-controlled robots.
- Built 3D visualization/test data generation tools using Python.
- Created graphical robot maintenance software using Java.
- Compiled and tuned a real-time Linux kernel and ported the real time control software (from a custom bare metal OS) to work on it.
- Wrote design and implementation documents.
Technologies: Java, Python, Simulink, MATLAB, C++
Experience
Feathery Tale (Mobile Game)
Feathery Tale is an Android game I've programmed in my free time in 2016.
The game builds on the Orx game engine written in C. The vast majority of the game's code is in C++. At the outermost layer, the game is exposed to Java using SWIG in order to integrate with the phone's functionalities.
The project features:
* a custom soft-body physics engine
* a custom C++-embedded DSL for building state machines and behavior trees for character AI and level scripting
* custom UI widgets, like scrollable views, dialogs, buttons etc.
The game builds on the Orx game engine written in C. The vast majority of the game's code is in C++. At the outermost layer, the game is exposed to Java using SWIG in order to integrate with the phone's functionalities.
The project features:
* a custom soft-body physics engine
* a custom C++-embedded DSL for building state machines and behavior trees for character AI and level scripting
* custom UI widgets, like scrollable views, dialogs, buttons etc.
Orx Animation Editor
https://github.com/enobayram/OrxAnimationEditorAn open-source desktop GUI application for creating animation sequences and animation transition graphs compatible with the Orx Game Engine (http://orx-project.org/)
The editor is written using Java/Swing and it builds with Gradle.
The editor is written using Java/Swing and it builds with Gradle.
Education
2009 - 2012
Progress towards a Ph.D. in Robotics & Automation
Technical University of Denmark - Copenhagen, Denmark
2006 - 2008
Master of Science Degree in Robotics & Automation
Technical University of Denmark - Copenhagen, Denmark
2002 - 2006
Bachelor's Degree in Electrical Engineering
Middle East Technical University - Ankara, Turkey
Skills
Tools
Git, MATLAB
Languages
Haskell, C++, Simulink, Java, Python
Paradigms
Functional Programming
Platforms
Linux, Apache Kafka, Visual Studio Code (VS Code)
Frameworks
Boost, Caffe
Storage
PostgreSQL, SQLite
Other
NixOS
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring