Develop and maintain scalable and reliable backend systems for AI-powered RAG services. Integrate AI algorithms into backend systems. Develop backend and UI features for a video analytics platform. Research algorithms and solutions.

Work on authentication and authorization using OAuth with the MaxxTrader trading system. Research algorithms and develop solutions.

Defined web core service for client company. Worked in an AI startup remotely, focusing on scaling the backend system for the mobile app with an ML model running for 10,000+ concurrent users. Conducted load testing, performance testing, and profiling of API endpoints. Applied concurrency, database optimization, load balancing, and auto-scaling in the backend and OCI cloud infrastructure.

Defined web core service for the client company. Worked on TikTok direct messaging safety (backend) with extremely high QPS, TPS. Reviewed source code. Integrated and A/B tested machine learning models into TikTok's direct messaging system. Researched algorithms and solutions, delivered API features, deployed worldwide, monitored, and scaled. Collaborated with iOS and Android engineers on the client side. Worked with data scientists to design data schemas for large systems.

Data extraction, ETL, mining, and analysis on business insights from PT-level data coming from different sources and services. Batch processing and real-time processing of terabyte-scale data. Improving the data pipeline for PT-level data.

Behavioral biometric authentication utilizing machine learning and deep authentication IAM. Reviewed source code for quality and efficiency. Developed rule engine algorithms and data collector for fraud detection algorithms focusing on time-series analysis for user consent. Conducted research on algorithms and solutions.

Defined Sitecore control and Web core service for the client company. Project 1: - Worked on the Authentication system, SSO, Identification broker service for the Finnish Trust Network, and mobile authentication for strong electronic identification services that serve 400k+ active users per day. - Implemented solutions for a secure strong authentication proxy server and security services plugin for other clients. - Handled ETL data warehouse batch jobs for analytics. - Elisa network services serve 3 million users. Project 2: - Delivered a data-intensive MVP product in IIoT. - Integrated with various data sources via ETL process. - Developed rule engine algorithms for supply chain data. - Built a data pipeline with Spring Cloud Stream MQTT system and protocol buffer data with a scalable service bus system. - Implemented full-text search feature and metric system. - Designed a pub-sub system for asynchronous processing. Conducted research on algorithms and solutions.

Project 1: Work with book packaging automation machine control server and system visualization. Implement API and UI features. Configure Linux server and complex Vagrant script. Project 2: Maintain and implement new features in the e-commerce platform. Work with data dumps and data backups using MySQL/MariaDB. Manage CentOS 7 server and handle complex Vagrant scripts and virtualization. Project 3: Deliver a production cataloging system that handles macros, shortcut keystrokes, long-running asynchronous processing, and full-text search for Marc data format with PostgreSQLDB. Review source code. Research algorithms and solutions.

Technical consultation and implementation for a web-based application integrating three different legacy software systems using Node.js and various web technologies, including optimized search, complex data frames, and history snapshots. Discuss and receive tasks from clients. Provide solutions and support team members in completing their tasks. Define migration software architecture and system. Provide design patterns. Review source code.

Backend bug fixing in MongoDB data model, implementing REST API features. Defined structure for frontend templates. Managed deployment pipeline on AWS with serverless architecture, handling uploads to AWS S3 blob storage. Conducted research on algorithms and solutions.