Mantas Stankevicius
Verified Expert in Engineering
Software Developer
Vilnius, Vilnius County, Lithuania
Toptal member since June 8, 2020
Mantas is a software engineer with many years of hands-on experience in various fields: web and desktop application development, microcontroller programming, data aggregation, and analysis. For the past five years, he has developed and maintained critical services at the world's largest and highest-energy particle collider in the world. For most of his professional career, Mantas has been in a multicultural environment, working with experts from all over the world.
Portfolio
Experience
- Python - 7 years
- APIs - 7 years
- SQL - 6 years
- Linux - 5 years
- Site Reliability Engineering (SRE) - 5 years
- Configuration Management - 5 years
- DevOps - 5 years
- Solidity - 2 years
Availability
Preferred Environment
REST APIs, RESTful Development, Elasticsearch, SQLAlchemy, Flask, Python, Linux
The most amazing...
...project I've worked on is an online monitoring system, a critical service for one of the experiments at Large Hadron Collider (LHC) at CERN.
Work Experience
Computing Engineer | Senior Fellow
Cern
- Handled CERN network statistics monitoring services. Developed an upgrade of SNMP-based monitoring (Python, InfluxDB, Grafana, and OIDC). Developed a pilot project using telemetry (JTI and Prometheus) and managed configuration (Puppet and OpenStack).
- Worked on a CERN IoT network infrastructure (LoRaWAN). Set up a LoRaWAN stack (RabbitMQ, Chirpstack, Redis, and PostgreSQL) and managed configuration (Puppet, OpenStack, and Foreman). Monitored Prometheus, collectd, and Grafana.
- Contributed to the CERN IT security team (incident response and pen testing).
Software Engineer
CERN
- Developed the back end of the online monitoring system of the CERN Compact Muon Solenoid experiment.
- Contributed heavily to the redesign of a new system, content migration planning, and requirement analysis as an expert in the legacy system.
- Implemented and maintained continuous integration, release management, and deployment.
Software Engineer
Freelancer
- Completed sentiment analysis of Lithuanian language in unstructured text.
- Created a real-time location system of multiple objects using RSSI and TOA, anomaly detection, Kalman filter, and visualization in 3D.
- Embedded programming of STM32, NRF51, ESP8266, and integration with DW1000 transceiver.
Software Developer
CERN
- Developed the CERN Compact Muon Solenoid (CMS) software documentation system.
- Maintained and implemented new features and automated processes.
- Provided user support. Helped software developers to properly comment and document code.
Experience
Online Monitoring System at CERN CMS
Real-time Object Tracking System
• Embedded programming. High performance and limited size applications using transceivers and motion sensors. Implemented custom communication protocols.
• Aggregation. Application to collect and buffer a small amount of latest high precision data from sensors in memory for real-time aggregation. Aggregation part is the most challenging as it consists of anomaly detection, filtering, and determining object position by the time of arrival.
• Visualization. Application to visualize the final position of multiple objects in a 3D space.
Education
Master's Degree in Informatics
Vilnius University - Vilnius, Lithuania
Bachelor's Degree in Informatics
Vilnius University - Vilnius, Lithuania
Skills
Libraries/APIs
SQLAlchemy, REST APIs, jQuery
Tools
Grafana, Puppet, Git, GitLab CI/CD, GitLab
Languages
Python, HTML, JavaScript, SQL, Lua, Bash, Solidity
Frameworks
Flask, Selenium, Bootstrap
Paradigms
RESTful Development, Automation, DevOps, Object-oriented Programming (OOP), Design Patterns
Platforms
Linux, Docker, JavaFX
Storage
MySQL, SQLite, Elasticsearch, Databases
Other
RESTful Microservices, APIs, Configuration Management, Data Scraping, Web Crawlers, Site Reliability Engineering (SRE), CI/CD Pipelines, Algorithms, Data Structures
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