Rakhat Toleu

.NET Developer

Backend development in a medical SaaS / B2B patient-notification platform for healthcare and CRM workflows. Designed and implemented high-load microservices and integrations with external systems using .NET, RabbitMQ, MassTransit, PostgreSQL, Kubernetes, and Rancher. Migrated polling-based notification generation to an event-based model: appointment and scenario events now create business processes and scheduled actions for reliable rescheduling, cancellation, retries, and delivery execution. Led the MySQL to PostgreSQL migration process, ensuring smooth data transfer, minimizing downtime, and improving reporting query performance. Configured CloudConfig for environment variable management and supported CI/CD, Helm-based deployments, and Kubernetes release workflows. Set up Grafana dashboards, metric collection, and OpenSearch from scratch to improve monitoring, observability, and incident diagnosis. Participated in code reviews, refactoring, performance optimization, and engineering standardization across backend services. Used AI-assisted development tools including Codex, Claude Code, and GLM for implementation support, code review, refactoring, and technical investigation. Worked with medical data and PII-sensitive flows, supporting auditing, secure data handling, and compliance-focused engineering practices.

• Migrated polling-based notification generation to an event-based model
• Led the MySQL to PostgreSQL migration process, ensuring smooth data transfer, minimizing downtime, and improving reporting query performance
• Set up Grafana dashboards, metric collection, and OpenSearch from scratch to improve monitoring, observability, and incident diagnosis

.NET Developer

Developed and maintained enterprise web applications for healthcare clients. Worked with C#, .NET Core, MS SQL Server, T-SQL stored procedures, and Dapper. Focused on backend services, data access, business logic, database performance, Agile/Scrum collaboration, documentation, and code reviews.

.NET Developer

Developed microservices and internal modules for UTG Group using .NET, PostgreSQL, GitLab CI/CD, Grafana, Swagger, and Entity Framework. Improved system performance for large-scale data operations.

• Improved system performance for large-scale data operations

.NET Developer

Developed services for cargo transportation systems for Kedentransservice JSC. Implemented transaction, call, and notification services and deployed them on Linux Ubuntu servers.

.NET Developer

Participated in the development of Haxpe, a German analogue of Naimi.kz. Supported senior engineers in backend development and database integration.