Madiyar Sarbayev

Go Backend / AI Infrastructure Developer

UnGelogen GmbH

Built Go backend components and durable Temporal workflows for an AI agent, implementing hybrid retrieval, data preparation, entity matching, and validated LLM outputs.

• Developed Go backend components for an AI agent that extracts, matches, and transforms information from documents and database records into structured entities using LLMs and a retrieval pipeline. • Implemented hybrid search using BM25, dense vectors, and sparse vectors, combining multiple search representations to account for both exact terms and semantic similarity. • Integrated multivector retrieval and ColBERT-style search with MaxSim, matching queries against individual document tokens and passages rather than a single embedding per document.

Go Backend Developer, HighLoad Data Platform

TrustExam (Finance.kz)

Built Go services and event pipelines for a high-load data platform, including ClickHouse delivery, sensitive-data filtering, reliable messaging, and observability.

• Designed and developed high-load Go services to receive and process customer requests and log streams, using concurrent processing, worker pools, and asynchronous queues to separate data ingestion from analytics and maintain stable operation during peak loads. • Implemented an event delivery pipeline to ClickHouse with batch processing and managed buffering, reducing individual write operations and increasing analytics-pipeline throughput.

Go Backend Developer, Fleet & Telematics Platform

TOO Avto-Batys

Built Go backend services for fleet and telematics operations, including GPS ingestion, trip workflows, APIs, and PostgreSQL/Redis optimization.

• Developed Go backend services for managing heavy equipment and drivers, bringing vehicle registration, telemetry processing, trip management, and reporting into a unified domain model. • Implemented a GPS and telemetry event ingestion and processing pipeline, storing movement history in PostgreSQL and enabling equipment-use reports for specified periods. • Designed a compliance module for registering heavy equipment and drivers, validating identification data, required fields, and entity relationships, reducing invalid registrations at the backend level.

Secondary school