Sahil Madaan

Backend Engineer

Delhi, India5 yrs 6 mos experience
Most Likely To SwitchHighly Stable

Key Highlights

  • 5+ years of experience in backend engineering
  • Expert in building cloud-native and serverless systems
  • Proven track record in optimizing performance and scalability
Stackforce AI infers this person is a Backend Engineer specializing in E-commerce and On-Demand platforms with expertise in cloud-native architectures.

Contact

LinkedIn

Skills

Core Skills

Backend Architecture & System DesignAws & Serverless ArchitecturesMicroservices & Event-driven Systems

Other Skills

Node.jsAmazon Web Services (AWS)PostgreSQLMongoDBAWS LambdaAPI GatewayExpress.jsReact.jsNoSQLSQLMicroservices ArchitectureEvent-Driven ArchitectureGit

About

I am a Senior Backend Engineer (SDE-II) with 5+ years of experience building and scaling cloud-native, high-performance backend systems for consumer and enterprise platforms. At QuizKart, I design and optimize backend services for a gamified e-commerce platform, working extensively with Node.js, TypeScript, and distributed system principles. My work involves building scalable REST APIs, designing microservices and event-driven workflows, and optimizing databases and caching layers to support high-traffic production systems (500+ RPS). I have hands-on experience designing cloud-native and serverless components on AWS, including Lambda, API Gateway, EC2, RDS, DynamoDB, S3, SQS, SNS, IAM, and CloudWatch. I focus on building fault-tolerant, cost-efficient systems with proper monitoring, retries, and failure handling. Previously, I’ve worked across domains such as e-commerce, food delivery, and on-demand platforms at Suffescom Solutions and JungleWorks, where I built real-time features, integrated third-party services, and improved API reliability and performance. My core strengths include: • Backend architecture & system design • Node.js / NestJS / TypeScript • Microservices & event-driven systems • AWS & serverless architectures • Performance optimization & scalability I enjoy solving complex backend problems, collaborating with cross-functional teams, and building systems that scale reliably in production.

Experience

5 yrs 6 mos
Total Experience
1 yr 10 mos
Average Tenure
3 yrs 6 mos
Current Experience

Quizkart

SDE-II | Backend Engineer (Node.js / TypeScript / MongoDB)

Nov 2022 – Present · 3 yrs 6 mos

  • Architected and owned cloud-native backend systems for a quiz-based e-commerce platform using Node.js, NestJS, and PostgreSQL.
  • Designed and implemented microservices and serverless components using AWS Lambda and API Gateway, enabling automatic scaling and cost-efficient execution.
  • Built high-performance REST APIs for quiz engine, scoring, authentication, and analytics, handling 500+ RPS with <220ms latency.
  • Implemented event-driven communication using Kafka, RabbitMQ, SNS, and SQS to decouple services and improve system resilience.
  • Used Redis caching and optimized PostgreSQL indexing strategies to reduce database query latency by ~40%.
  • Deployed backend services on AWS EC2 behind Application Load Balancer, with auto-scaling and multi-AZ setup for high availability.
  • Secured service-to-service communication using IAM roles with least-privilege access policies.
  • Implemented CloudWatch logging, metrics, and alarms to monitor production failures, latency, and throughput.
  • Containerized services using Docker and deployed using Kubernetes with CI/CD pipelines.
Node.jsAmazon Web Services (AWS)PostgreSQLMongoDBBackend architecture & system designAWS & serverless architectures

Suffescom solutions pvt. ltd.

Associate Software Developer

Apr 2021 – Nov 2022 · 1 yr 7 mos · Mohali district · On-site

  • Designed, developed, and maintained multiple backend applications for international clients using Node.js, Express.js, and MongoDB.
  • Played a key role in developing the **Eats food delivery app (Dubai)** and **Taxi booking system**, focusing on real-time order management, tracking, and payment workflows.
  • Collaborated with system engineers, frontend developers, and data teams to deliver integrated and scalable backend solutions.
  • Provided technical leadership by introducing new workflows, modular coding standards, and performance optimization practices within the team.
  • Interacted directly with managers and clients to gather requirements, resolve queries, and ensure timely, high-quality project delivery.
  • Optimized API response times and database performance, enhancing the overall efficiency and scalability of deployed applications.
Node.jsExpress.jsMongoDBReact.jsNoSQLBackend architecture & system design+1

Jungleworks

Associate Software Engineer

Nov 2020 – Apr 2021 · 5 mos · Delhi, India · On-site

  • Built and maintained scalable web applications and backend systems using Node.js, Express.js, MongoDB, and SQL.
  • Developed high-quality, modular, and reusable code to support multiple production-level projects within the JungleWorks ecosystem.
  • Performed debugging, troubleshooting, and optimization to ensure reliable and efficient application performance.
  • Managed hosting environments, deployments, and server configurations to maintain uptime and performance standards.
  • Collaborated with QA and DevOps teams to identify issues, automate testing processes, and ensure smooth production releases.
  • Contributed to improving internal coding standards and workflow automation, enhancing overall development efficiency.
Node.jsExpress.jsMongoDBSQLNoSQLBackend architecture & system design

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