Adnan Serki

As a Software Developer Back End Developer at Rise Advisory, I have been responsible for developing and maintaining back end systems for web applications. I have utilized my skills in Laravel and AI to craft impactful solutions and leverage AI for innovative problem-solving.
Key Responsibilities:
• Architected databases and designed efficient data models to ensure optimal performance and scalability.
• Developed and deployed cloud-based applications on AWS, ensuring scalability and reliability.
• Managed entire project life cycles, from requirements gathering to deployment and maintenance.
• Utilized version control systems like GitHub for efficient code management and collaboration. Utilized version control systems like GitHub for efficient code management and collaboration.

○ Architected Multi-Country Health & Wellness Marketplace from scratch: Designed and deployed multi-tenant
SaaS platform supporting 50+ vendor businesses and 25K customers across multiple countries, currencies, and languages
○ Engineered multi-tenant architecture using shared database with tenant isolation via scoped queries and token-based
access control, preventing cross-tenant data leakage while simplifying vendor onboarding
○ Built RESTful API handling 200K-400K requests/day with average response time under 200ms using Laravel queues
for async processing and Redis caching for frequently accessed data
○ Designed normalized database schema managing 40-120GB of transactional data with strategic indexing on tenant IDs
and foreign keys, optimizing query performance for multi-tenant queries
○ Implemented JWT-based authentication with role-based access control (RBAC) supporting vendor admin, staff, and
customer permission levels across the platform
○ Configured AWS infrastructure including EC2 instances, RDS MySQL with automated backups, S3 for media storage
with CloudFront CDN, and VPC with security groups for network isolation
○ Established CI/CD pipeline using GitHub Actions automating test execution and deployment to staging/production
environments, reducing deployment time from 2 hours to 15 minutes
○ Set up CloudWatch monitoring with CPU utilization alerts and custom metrics tracking API error rates and response
times for proactive incident detection
○ Currently containerizing application using Docker to enable horizontal scaling and improve deployment consistency
across environments
○ Maintained legacy Java-based financial advisor web application, resolving critical bugs and implementing security
patches for production system

As a Back End Developer at CreativITy - Mobile App Development, I was responsible for developing and maintaining back end systems for mobile applications.
Key Responsibilities:
• Developed and maintained back end functionality for mobile applications using Laravel and other relevant technologies.
• Worked closely with front end developers to ensure seamless integration between front end and back end systems.
• Deployed and maintained applications on cloud platforms to ensure scalability and reliability.

○ Parcel Delivery Management System: Architected event-driven backend for logistics platform serving
300-600 concurrent users at peak with real-time GPS tracking and push notifications
○ Designed asynchronous architecture using Laravel queues to handle location updates from 100+ simultaneous drivers,
preventing database bottlenecks by processing writes through queue workers instead of synchronous requests
○ Implemented WebSocket-based real-time location broadcasting enabling live map updates for customers tracking
deliveries with sub-second latency
○ Built push notification system using Firebase Cloud Messaging (FCM) with queued job processing, handling notification
spikes without blocking API responses
○ Optimized MySQL queries and implemented Redis caching layer reducing API response times from 800ms to 120ms for
frequently accessed delivery status endpoints
○ Enterprise Gym SaaS: Developed complete backend system managing member subscriptions, class
schedules, and payment processing for fitness centers
○ Created RESTful API following OpenAPI specification with versioning strategy (v1, v2) enabling backward-compatible
updates and comprehensive API documentation
○ Implemented Sanctum token authentication for mobile app integration with refresh token rotation for enhanced security
○ Platform: Built transactional reward point system for shopping festival with
fraud prevention and audit logging
○ Designed atomic point balance system using MySQL transactions with row-level locking preventing race conditions
during concurrent redemptions
○ Implemented server-side validation for all point transactions with immutable audit log capturing before/after balances,
eliminating client-side manipulation vulnerabilities
○ Built background job processing for point calculations, merchant settlements, and analytics using Laravels queue
system with multiple worker processes
○ Developed B2B marketplace for construction companies featuring company
profiles, product catalogs, and RFQ management
○ Managed AWS deployments across all projects including EC2 provisioning, RDS configuration, S3 bucket policies,
SSL/TLS certificate setup, and IAM role management
○ Established Git workflow with feature branching and pull request reviews maintaining code quality across development
team

• Collaborated with cross-functional teams to identify and resolve quality issues, resulting in highly empowered product reliability.
• Developed processes to track and report on quality metrics, allowing for quick and informed decision-making by management.
• Developed and implemented project quality standards that ensured the highest level of quality for the final product.

I was responsible for system designing, code review and test Review. I managed production support issues assigned to developers and monitored that they are resolved efficiently and closed on time. I was also the part of team for the creation and maintenance of web server for the company. I have also worked on ASP.Net C# under the guidance of senior developer at our firm. I also have hands on experience on oracle database creation, maintenance, updating and optimization.