Sujit Roy

DevOps & Backend Team Lead

kumarsujitroy@gmail.com | India | github.com/SujitRoy | linkedin.com/in/roysujit | sujitroy.is-a.dev

Professional Summary

Experienced DevOps & Backend Team Lead with 12+ years of expertise in cloud infrastructure, CI/CD pipelines, and scalable backend systems. Currently leading the ADSR (Ad Serving & Revenue) platform development at Fundle.AI. Proven track record of architecting high-availability systems serving 50M+ users at Paytm m'Loyal. Combines deep technical expertise in Python, Kubernetes, and cloud platforms with strong leadership and mentorship skills.

Technical Skills

Cloud & Infrastructure

  • AWS (EC2, S3, RDS, EKS, Lambda)
  • Kubernetes, Docker, Containerd
  • Terraform, Ansible, Helm, CloudFormation
  • Infrastructure as Code (IaC)

DevOps & Automation

  • CI/CD: GitHub Actions, GitLab CI, Jenkins
  • GitOps: ArgoCD, Flux
  • Automation: Python, Bash Scripting
  • Infrastructure Provisioning & Configuration

Backend Development

  • Python (Expert), FastAPI, Django, Flask
  • Node.js, Express, REST APIs
  • Microservices Architecture, gRPC
  • Event-Driven Systems, Message Queues

Database Systems

  • PostgreSQL, MySQL, Redis, MongoDB
  • Database Design, Query Optimization
  • High Availability & Replication
  • Data Migration & Versioning

Leadership

  • Team Lead (6+ years), Mentorship
  • Agile, Scrum, Sprint Planning
  • Architecture Design & Code Review
  • Cross-functional Collaboration

Monitoring & Observability

  • Prometheus, Grafana, Mimir
  • ELK Stack (Elasticsearch, Logstash, Kibana)
  • OpenTelemetry, Distributed Tracing
  • Incident Response & On-call Rotation

Version Control

  • Git (Expert), GitHub, GitLab
  • Branching Strategies, Trunk-Based Dev
  • Monorepo Management
  • Git Hooks & Automation

Testing & Quality

  • Pytest, Unit Testing, Integration Testing
  • API Testing: Postman, Newman
  • Load Testing: k6, JMeter
  • SonarQube, Static Code Analysis

Security

  • HashiCorp Vault, Secrets Management
  • AWS IAM, RBAC, OAuth2
  • Vulnerability Scanning: Snyk, Trivy
  • Network Security, Zero Trust

Systems Programming

  • C, C++, Linux Kernel Development
  • Android Internals (AOSP), Custom ROMs
  • Low-level Performance Tuning
  • Embedded Systems Knowledge

Professional Experience

DevOps & Backend Team Lead

Fundle.AI
Remote

Leading development of the ADSR (Ad Serving & Revenue) platform within the Retail Intelligence ecosystem at Fundle.AI.

  • Architected and deployed Kubernetes-based infrastructure on AWS with Terraform IaC
  • Implemented GitOps workflows using ArgoCD for continuous deployment
  • Built scalable backend services using Python, FastAPI, and PostgreSQL
  • Designed and optimized APIs for ad serving with sub-100ms response times
  • Established monitoring and observability stack with Prometheus, Grafana, and OpenTelemetry
  • Led a team of 8 engineers through Agile methodologies
  • Achieved 99.99% uptime SLA with comprehensive incident response procedures
  • Automated infrastructure provisioning, reducing deployment time by 70%

Team Lead / MTS

Paytm m'Loyal
India

Managed infrastructure for one of India's largest loyalty platforms serving 50M+ users. Architected high-availability systems handling 10K+ transactions per second.

  • Designed and implemented multi-region deployment architecture for high availability
  • Built auto-scaling Kubernetes clusters handling peak traffic loads
  • Established comprehensive disaster recovery procedures
  • Optimized infrastructure costs, achieving 500% growth while maintaining budget
  • Implemented CI/CD pipelines with GitHub Actions and Jenkins
  • Led incident management with PagerDuty and OpsGenie integration
  • Mentored a team of 12 engineers in DevOps best practices

Senior Developer

Mobiquest Mobile
India

Senior Developer focused on mobile technology and Android systems development.

  • Contributed to custom Android ROM and kernel development projects
  • Built custom kernels optimizing performance and battery life for 500K+ users
  • Performance tuning and memory management optimization
  • Developed in C/C++ for systems programming
  • Established CI/CD pipelines for open source projects

Key Projects

ADSR Platform at Fundle.AI

Lead Developer & Architect

Leading development of the ADSR (Ad Serving & Revenue) platform. Focused on backend development, database optimization, and high-performance ad serving solutions.

Technologies: Python, FastAPI, PostgreSQL, Kubernetes, AWS, Terraform, ArgoCD, Prometheus, Grafana
  • Kubernetes migration with zero downtime
  • Terraform Infrastructure as Code
  • GitOps workflows with ArgoCD
  • 70% faster deployments

Infrastructure Scaling at Paytm m'Loyal

Infrastructure Architect & Team Lead

Managed infrastructure for one of India's largest loyalty platforms. Architected systems that scaled from 1M to 50M+ users while maintaining 99.99% uptime.

Technologies: AWS, Kubernetes, Docker, Jenkins, Prometheus, Grafana, Redis, ELK Stack
  • Multi-region deployment architecture
  • Auto-scaling clusters for peak traffic
  • 50M+ active users supported
  • 10K TPS transaction volume

Open Source & Systems Engineering

Kernel Developer & Community Leader

Contributed to custom Android ROM and kernel development projects. Built custom kernels optimizing performance and battery life for 500K+ users worldwide.

Technologies: Android, AOSP, C, C++, Linux Kernel, Git, Jenkins
  • Kernel development and customization
  • Battery life improvement (40%)
  • 1.2K GitHub stars
  • 500K downloads

Education

Bachelor of Engineering in Computer Science

West Bengal University of Technology

Certifications

  • AWS Certified Solutions Architect - Associate
  • AWS Certified DevOps Engineer - Professional
  • Certified Kubernetes Administrator (CKA)
  • Terraform Associate Certification

Additional Information

Languages: English (Fluent), Hindi (Native)
Interests: Open Source, Cloud Computing, Systems Programming, Mentorship