Experience

Designed and developed (work-in-progress) a software system with a web-based UI for accessing time-series data at the KAGRA gravitational wave observatory (in Gifu, Japan). This tool allows viewing of real-time data as well as previously collected data from a remote storage cluster. It could also repackage data in the selected time interval into file formats commonly used within the collaboration (.csv, .gwf) for downloading and offline analysis.

Below are the technologies/methods used in this project:

• Backend: Python (the AsyncIO framework, WebSocket - aiohttp, S3 API - boto3, HTCondor), Docker, RESTful API, RabbitMQ, SQLite, Traefik (reverse-proxy, SSL/TLS), Proxmox, Debain.
• Frontend: JavaScript, React.js, Redux.js (RTK), D3.js, MaterialUI, and CSS. Used the Vite build tool.
• Other: Used GitLab CI to automate packaging parts of the system.

• Developed a software pipeline for low-latency calibration of the KAGRA observatory data. The pipeline is utilized for the reconstruction of GW strain signal with high calibration accuracy and can be launched in both the low-latency mode for reconstruction from online data and the offline mode for reconstruction from data stored on a compute cluster. Reconstructed time-series data are used by most GW data analysis pipelines.
• Worked on calibration-related tasks: calibration model development, transfer function measurements, Photon Calibrator (Pcal) commissioning, and maintenance of the CentOS 7 server node that runs the low-latency calibration pipeline.
• Trained a new researcher to take over the Pcal system.
• Hardware activities: maintenance and improvements of the Pcal optical system and electronics, characterization of the Pcal system.
• Analysis: Wrote scripts for analyzing time-domain and frequency-domain measurements, Gaussian beam profile fitting, etc.
• Developed a Python WSGI app (HTTP) for fetching instrument data from NDS servers, doing simple transformations, and providing downsampled data and statistical summaries.

• February 2015 – December 2017, resident at the LIGO (Laser Interferometer Gravitational Wave Observatory) Hanford Observatory near Richland, Washington conducting research for Ph.D.
• Worked on calibration of Advanced LIGO detectors: measurement and analysis of the differential arm length sensing and actuation responses (took measurements, composed LTI models in Matlab, fitted model parameters).
• Developed and implemented a method for tracking and compensating for temporal variation in responses of the second-generation gravitational wave detectors.
• Analyzed calibration-related data on the LIGO Data Grid computer cluster.
• Developed methods for propagating the laser power sensor calibration from the US National Institute of Standards and Technology to the LIGO Photon Calibrator sensors.

• Research on modeling of photonic crystal nanocavities. Numerical study of the photonic band structures of models and finite-difference time-domain simulations on computer clusters at UT Rio Grande Valley and at the Texas Advanced Computing Center (TACC).
• Teaching assistant for Computational Physics, Physics, and Astronomy labs.

AlatauSoft Ltd.\ was a small IT company that offered corporate document management solutions and other systems for businesses.

• Development of a document management system on the Lotus/Domino platform for Kazakhmys (a mining corporation) and similar companies. Development of Oracle-based applications (Oracle PL/SQL, OC4J).

BSB is a company that develops and supports software and maintains some of the IT infrastructure used by the National Bank of Kazakhstan and its dependent financial institutions.

While I was studying for my B.S. in Automation, I started working at BSB on a part-time contract basis. After graduation, I switched to a full-time work.

• Development of some features and support of a subsystem called the ``Electronic Auction’’. This subsystem, developed on Delphi+Oracle PL/SQL, is one of the tools used by the National Bank for managing the currency rate by auctioning limited-time notes to private banks and agencies.