🚀 Backend Engineer | Fintech Systems | Node.js Specialist
I’m a Backend Engineer with 3+ years of experience, currently working as an Associate Software Engineer in the fintech domain. I specialize in building scalable, reliable, and production-grade backend systems using Node.js and modern cloud technologies.
- 💼 Backend-focused Software Engineer with hands-on experience in fintech & payment systems
- ⚙️ Strong in Node.js, JavaScript, TypeScript, and backend system design
- 🏦 Worked on bond trading platforms, payment gateways, reconciliation systems, and async workflows
- ☁️ Experience with AWS, Serverless, Microservices, and cloud-native architectures
- 📚 Strong believer in continuous learning & self-improvement
- 📗 Love reading books and staying updated with new tech
- JavaScript (ES6+), TypeScript
- Java, C++, C, Python
- Node.js, Express.js
- REST APIs, Microservices
- MongoDB, MySQL, PostgreSQL
- Redis
- RabbitMQ
- AWS (Lambda, EC2, S3)
- Docker, Serverless Architectures
- Git, GitHub
- Metabase
- Designed a backend system to reconcile payment gateway transactions with internal orders
- Implemented webhook handling, idempotency, async processing, and mismatch reporting
- Tech: Node.js, Redis, RabbitMQ, MySQL
- Built a scalable HTML-to-PDF conversion service using Puppeteer on AWS Lambda
- Optimized memory usage and handled concurrent document generation
- Tech: Node.js, Puppeteer, AWS Lambda, S3
- Implemented hierarchical RM-client relationships using Nested Set Model
- Optimized read-heavy queries and enabled multi-level access control
- Tech: Node.js, MongoDB
📂 Check my repositories below for more backend-focused projects and experiments.
- 💼 LinkedIn: https://www.linkedin.com/in/ajay-singh-01714b1ba
- 💻 GitHub: https://github.com/Ajay16777
- 📧 Email: ajaysinghdev745@gmail.com
⚠️ Disclaimer:
All views and opinions expressed here are my own and do not represent those of my employer.