Open to opportunities

Ismaeel Aleem

@ismaeelaleem

Message

Senior Full Stack Engineer specializing in scalable payments, cloud, and security.

United States

Message

What I'm looking for

I seek senior engineering roles building scalable, secure payment or e-commerce platforms, with strong CI/CD, mentorship, and cross-functional collaboration.

I am a Senior Full Stack Engineer with 7+ years building and scaling enterprise-grade fintech, e-commerce, and cloud security platforms. I specialize in backend systems using Java (Spring Boot), C#/.NET Core, and Ruby on Rails, and deliver responsive React/Next.js frontends.

My work has driven measurable business impact: reducing partner onboarding time by 40%, increasing premium app adoption by 28%, and improving transaction success rates by 12%. I design event-driven microservices, API-driven integrations, and migration strategies for legacy systems.

I lead cross-functional teams, mentor junior and mid-level engineers, and champion modern engineering practices including CI/CD automation, static type checks, and performance profiling. I have experience integrating fraud detection, payments (Stripe), and third-party platform APIs.

I prioritize secure, maintainable, high-performance solutions—balancing backend scalability with frontend performance to improve conversion, reliability, and developer productivity.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Stripe

May 2022 - Present (3 years 7 months)

Designed Java-based orchestration services and C#/.NET Core backend systems for Stripe App Marketplace, reducing partner onboarding time by 40% and enabling 2,000+ enterprise app installs in the first year.

Java C# .NET Core Ruby React TypeScript Microservices API Design CI CD AWS

Full Stack Engineer

Shopify

Jan 2020 - Apr 2022 (2 years 3 months)

Developed Java catalog sync microservices and C#/.NET middleware for OAuth token management and webhook processing, improving multi-channel commerce reliability and reducing sync times for millions of SKUs.

Java C# .NET Core Ruby on Rails React Redux WebSockets PostgreSQL Redis CI CD

Software Engineer

Cloudflare

Jun 2018 - Dec 2019 (1 year 6 months)

Built Java-based WAF rule evaluation pipelines processing 20B+ daily HTTP requests and migrated security scripts to scalable C#/.NET Core services, improving performance and observability for security operations.

Java C# .NET Core Ruby Observability WAF Scalability Distributed Systems Performance Optimization Security

Full Stack Developer

Cleveroad

Jul 2017 - Apr 2018 (9 months)

Built Java booking APIs with WebSocket real-time updates and C# admin dashboards for multi-tenant configuration, maintaining <200ms latency under high concurrency and improving trial-to-subscription conversion.