saad siddiqui

Senior Software Engineer | Backend Development

Profile summary

Career highlights

Key skills

Professional experience

Directs engineering initiatives within the mobility and ride-hailing domain, modernizing core architectures and building scalable microservices. Manages backend modernization, event-driven pipelines, and high-volume data ingestion processes while guiding development workflows.

• •Modernized a legacy PHP 5.2 monolith to PHP 7.2 and re-architected it into Java/Spring Boot microservices with zero production downtime, engineering a custom migration framework that validated 90% parity across 20+ decomposed services.
• •Designed event-driven pipelines on Kafka, ActiveMQ, and AWS SQS with DLQ/retry logic, decoupling core services and stabilizing traffic spikes without message loss.
• •Built Spring Batch ingestion pipelines processing millions of records per run, replacing brittle cron jobs with Quartz Scheduler and cutting manual intervention to near zero.
• •Unified push-notification delivery into a single queue-driven service, consolidating iOS and Android logic and eliminating duplicate infrastructure.
• •Embedded AI-assisted workflows using Cursor and Claude Code into daily engineering, accelerating complex backend delivery by ~40% while codifying SonarQube standards enforced through AI rule files.

Managed client communication, requirements gathering, and technical decision-making across concurrent projects with asynchronous, cross-time-zone collaboration while partnering with the Project Manager on scope, timelines, and stack selection.

• •Led end-to-end delivery of 10 Laravel and React.js projects for international clients while fully remote, achieving an 85% on-time completion rate.
• •Partnered with the Project Manager on scope, timelines, and stack selection, reducing delivery bottlenecks.
• •Mentored junior developers through code review, pair programming, and knowledge sharing.

Directed government-scale web application development, shaping digital solutions across the Punjab province by gathering requirements and establishing project timelines.

• •Built web applications using Laravel and React.js to serve users across the Punjab province.
• •Participated in client-facing meetings to provide technical input and estimate timelines and resources.

Guided backend engineering initiatives for web applications, directing technical frameworks and transaction workflows within the division.

• •Delivered 100 percent of assigned Laravel and CodeIgniter projects on time.
• •Integrated Stripe and PayPal payment gateways for secure e-commerce transactions.
• •Collaborated with mobile developers to align API contracts and ensure smooth app integrations.

• •Executed routine bug fixes across software applications to preserve stability.
• •Applied code updates to maintain existing applications.

• •Executed technical decisions across concurrent projects, achieving an 85% on-time completion rate.
• •Resolved delivery bottlenecks by collaborating with project management on scope and timelines.

Projects

Zero-downtime monolith-to-microservices migration (Java/Spring Boot, Kafka, Kubernetes). Full detail in Experience above.

Self-built tooling (Cursor, Claude Code) automating service-boundary detection and regression validation. Full detail in Experience above.

Full-stack booking platform for European users: scheduling, availability and document workflows.

Microfinance ERP (donor verification, loan lifecycle) and multi-role CMS with Stripe/PayPal, including a CodeIgniter→Laravel migration.

Education

Languages