Workflow

Built a modular Action-Delivery service that serves as a unified layer for all communication channels, enabling seamless integration and sending through Email, SMS, Webhook, and supporting easy future channel expansion.

Developed the Scheduling and Orchestration service, which constructs ActionRuns based on timing or triggers by combining data from processes, events, participants, and custom schedules into a unified execution model.

Developed a generic Conditions Engine in NestJS, enabling dynamic workflows with real-time event processing and configurable business logic.

Implemented frontend components in React for building conditional logic and presenting results in a user-friendly interface.

Implemented automation flows based on Kafka event streams, ensuring reliable processing and extensibility across multiple organizational processes.

Designed and developed core backend modules using PostgreSQL with JSONB structures, supporting flexible storage of workflow rules and conditions.

Designed and delivered the full Action-Creation Pipeline, a distributed, event-driven workflow enabling creation, validation, persistence, and preparation of Actions using NestJS, Kafka, .NET workers, and PostgreSQL.

Developed the Validation Worker, ensuring real-time atomic uniqueness checks, schema validation, and configuration integrity. Replaced DB-based validation with a distributed Redis lock using SETNX to eliminate race-conditions and reduce database load.

Designed the system’s relational data model (ERD), covering actioncatalog, processactions, actioncondition, actionschedules, and action_run, with proper foreign keys, indexing, and structures optimized for workflow expansion.

Developed React UI components and multi-step wizards for creating and managing workflow actions, including catalog selection, condition configuration, and scheduling flows.

Implemented a development-optimized Docker architecture using Hot Reload, volume-mounted source code, and strict Dev/Prod configuration separation via compose overrides, ensuring fast iteration cycles without compromising production integrity.

Constructed a full multi-service Docker Compose environment integrating Kafka, Zookeeper, PostgreSQL, multiple microservices, and Kafdrop, providing deterministic local orchestration and consistent development environments for the entire team.

Adopted Contract-Driven Development using a centralized OpenAPI specification and automated code generation, establishing a unified API contract and consistent cross-service communication across all microservices.

Designed a scalable Generic Kafka Consumer using a TopicHandlerMap abstraction with DI-driven handler discovery, enabling plug-and-play message processors and eliminating duplicated topic-specific consumer code.

Engineered a resource-safe Worker Service by applying a Scoped DbContext Factory Pattern within a long-running HostedService, ensuring proper lifetime management, clean disposal, and stable PostgreSQL connectivity under load.

Migrated raw SQL logic to TypeORM entities and repositories, improving maintainability, enforcing schema consistency, and mitigating SQL injection risks through parameterized and type-safe data-access patterns.

Orchestrated a complete end-to-end workflow—from UI and Gateway to NestJS, Kafka pipelines, the .NET worker, and read/write PostgreSQL stores—achieving consistent cross-service data propagation and reliable system state synchronization.

Implemented a centralized Global Exception Filter in NestJS with structured error responses, enhancing observability, resilience, and debuggability across distributed HTTP and event-driven interfaces.

Automated regression detection using Git Bisect paired with a custom test script, enabling rapid pinpointing of faulty commits and dramatically accelerating troubleshooting across complex merge histories.

Developed a professional automated testing suite using xUnit, Moq, and SQLite In-Memory to validate domain logic, data-access constraints, and edge cases with high-fidelity verification of repository behavior.