Dynamic Workflow Engine

As a Senior Software Engineer at Brain Station 23 PLC, a key vendor for Grameenphone Ltd., I led the development of the Dynamic Workflow Engine (DWE), a mission-critical web application with over 30,000 active users at any given time. The DWE project was focused on approval management workflows, enabling admins to dynamically configure work processes and generate customized reports.
One of the key challenges we faced during the project was performance degradation due to the high volume of concurrent users and complex workflow transitions. To address this, I designed and implemented a job queue system to handle transitions and notifications asynchronously. This optimization resolved the slowness issue, leading to a 30% increase in overall business activities by significantly improving processing speed and system throughput.

Key Contributions::

  • Spearheaded the design and development of a robust job queue system to improve workflow transition efficiency.
  • Optimized system performance, addressing scaling issues with the application and reducing operational delays.
  • Ensured high availability and reliability for 30k concurrent users, resulting in seamless approval processes and a more responsive user experience.
  • Developed an advanced search algorithm incorporating an Elasticsearch, boosting search result relevance by 40%.
  • Standardized Docker-based containerization across the development lifecycle, streamlining deployment processes and reducing downtime, resulting in a 25% improvement in release cycles and 15% decrease in server provisioning costs.
  • Performed comprehensive code reviews and led weekly coding standards sessions, increasing team code quality by 20%.
  • Led the development of architectural blueprints that guided the team in deploying scalable software solutions, reducing implementation errors by 15% and accelerating development by 20%.

Technical Evolution:

Initially, the DWE system was developed using a monolithic architecture. Over two successful years of operation, as user demands and system complexity grew, we recognized the need to scale and modernize. To meet these demands, I led the transition to a microservices architecture, which allowed for greater scalability, modularity, and flexibility. This shift not only improved system performance but also enhanced our ability to rapidly develop, deploy, and maintain new features.


The migration to microservices enabled more dynamic configuration and processing capabilities, which were pivotal in meeting the business's growing needs. The move also improved the agility of the development process, reducing the time-to-market for new features and updates.

Project Technical Details:

  • Backend: CakePHP Framework, PHP 7
  • Frontend: jQuery, JavaScript, HTML5, Bootstrap 4
  • Database: MySQL
  • Infrastructure: Nginx, Redis, Docker, Jenkins (CI/CD), Minio (Object Storage)
  • Testing/Development Tools: Agile, JIRA, Unit Testing, Git, REST APIs

Microservices Architecture Stack:

  • Backend: Laravel (PHP 7),Slim
  • Frontend: Vue.js, HTML5, Bootstrap 4,Typescript
  • Database: MySQL, MongoBD
  • Infrastructure: Nginx, Redis, Docker, Jenkins (CI/CD), Minio (Object Storage)
  • Testing/Development Tools: Agile, JIRA, Unit Testing, Git, REST APIs
  • Code Quality: SonarQube
  • Agile Methodology with JIRA for project tracking, Git for version control
  • Service-to-service communication enabled by the API Gateway

The transition to microservices provided the flexibility to optimize each component of the system, ensuring high performance and a responsive user experience. As we continue to innovate and refine the architecture, the DWE remains a cornerstone of Grameenphone’s workflow management, meeting the evolving demands of the business.


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