DevOps &

I architect and lead high-availability cloud infrastructure, optimize CI/CD pipelines, and build teams that deliver scalable solutions. Specializing in backend development, database systems, and Python applications with current focus on the ADSR project at Fundle.AI.

~ tech_quotes.json

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profile.graphql

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# GetProfile Query
query GetProfile {
  engineer(id: "sujit_roy") {
    title: "DevOps & Backend Team Lead"
    company: "Fundle.AI"
    expertise {
      backend
      infrastructure
      devops
    }
    currentProject: "ADSR Platform"
    experience: "12+ years"
    systemsScaled: "50M+ users"
  }
}

Backend Systems

Python • FastAPI • Django • PostgreSQL • MySQL

12+ years experience

Infrastructure

AWS • Kubernetes • Terraform • Docker • Azure

50M+ users scaled

DevOps

GitHub Actions • ArgoCD • Prometheus • Grafana

99.99% uptime SLA

Leadership

Team Lead • Technical Strategy • Mentorship

8 team members led

✓ profile.graphql loaded Query time: 42ms

About Me

Building Systems That Scale

Experienced DevOps & Backend Team Lead with a proven track record at Paytm m'Loyal and currently leading development efforts on the ADSR (Ad Serving & Revenue) project at Fundle.AI. I specialize in automating infrastructure, optimizing CI/CD pipelines, backend development, database development, API testing and integration, database systems, and Python applications.

My unique expertise spans both enterprise DevOps and low-level Android systems, including custom ROM and kernel development. I am passionate about building resilient, scalable infrastructure that drives business growth.

Infrastructure as CodeCI/CD PipelinesCloud ArchitectureTeam LeadershipSystem AutomationAndroid Kernel

DevOps & Backend Team Lead

Fundle.AI

Leading development of the ADSR (Ad Serving & Revenue) platform within the Retail Intelligence ecosystem, focusing on backend development, database development, API testing and integration, and high-performance ad serving solutions.

Team Lead / MTS

Paytm m'Loyal

6 years managing and scaling infrastructure.

Senior Developer

Mobiquest Mobile

5+ years in mobile tech and Android systems.

Core Competencies

Technical Expertise

Deep expertise across the full infrastructure stack with a focus on scalability, reliability, and automation.

Cloud & Infrastructure

AWS (Primary) • Azure • GCP
Kubernetes (EKS/AKS) • Docker • ContainerD
Terraform • Ansible • Helm • Packer
Istio • Envoy • Service Mesh

DevOps & Automation

GitHub Actions • GitLab CI • Jenkins
ArgoCD • Flux • GitOps
Prometheus • Grafana • Datadog • ELK Stack
PagerDuty • OpsGenie • Incident Management

Version Control & Collaboration

Git • Gerrit • GitHub • GitLab
JIRA • Confluence • Slack Integration
Code Review • Branching Strategies • Git Flow
Trunk-Based Development • Monorepo Management

Backend Development

Python (Advanced) • FastAPI • Django • Flask
Node.js • Express • REST APIs
GraphQL • gRPC • WebSockets
Microservices • Event-Driven Architecture

Database Systems

PostgreSQL • MySQL • Oracle Database • MS SQL Server
MongoDB • Redis • Elasticsearch • Cassandra
DynamoDB • RDS • Aurora
Query Optimization • Replication • Sharding
NoSQL Design • ACID Compliance • CAP Theorem

Testing & Quality

API Testing • Integration Testing • PyTest • JUnit
Postman • Newman • Selenium • Cypress
Load Testing • k6 • JMeter
SonarQube • Code Coverage • TDD

Monitoring & Observability

Prometheus • Grafana • Thanos • Mimir
OpenTelemetry • Jaeger • Distributed Tracing
Log Aggregation • Loki • Fluentd • Fluent Bit
SLI/SLO/SLA Definition • Error Budgeting

Leadership & Strategy

Team Lead (6+ years) • Technical Mentorship
Architecture Reviews • RFC Process
Agile/Scrum • Sprint Planning • Retrospectives
Cross-Functional Leadership • Stakeholder Management
Hiring & Onboarding • Career Development

Security & Compliance

Secrets Management • HashiCorp Vault • AWS KMS
SAST/DAST • Snyk • Trivy • OPA/Rego
SOC2 Awareness • GDPR Compliance
RBAC • IAM • Zero Trust Networking

Android & Low-Level Systems

Custom ROM Development • AOSP
Android Kernel • Performance Tuning
Battery Optimization • Memory Management
C/C++ • Systems Programming

Case Studies

Impactful Engineering Leadership

Selected projects demonstrating technical leadership, infrastructure scalability, and business impact.

Current Leadership

ADSR Platform at Fundle.AI

Leading development of the ADSR (Ad Serving & Revenue) platform at Fundle.AI, part of their Retail Intelligence ecosystem. Responsibilities include backend development, database development, API testing and integration, and data infrastructure to power ad serving for malls, brands, and consumer monetization rails. Focused on high-performance ad delivery, real-time analytics, and revenue optimization systems.

 Kubernetes migration
 Terraform IaC
 GitOps workflows
 Security automation

#leadership#kubernetes#terraform#ci-cd#aws

70%

Faster Deployments

99.99%

Uptime SLA

Team Members

$240K

Annual Savings

Enterprise Scale

Scaling Infrastructure at Paytm m'Loyal

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

 Multi-region deployment
 Auto-scaling clusters
 Disaster recovery
 Cost optimization

#scaling#high-availability#fintech#automation#leadership

50M+

Active Users

10K TPS

Transaction Volume

Team Size

500%

Infra Growth

Technical Innovation

Open Source & Systems Engineering

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

 Kernel development
 Performance tuning
 Community leadership
 CI for OSS

#opensource#android#kernel#systems#performance

1.2K

GitHub Stars

500K

Downloads

40%

Battery Improvement

15%

Performance Gain

Endorsements

Professional Recognition

Feedback from colleagues and leaders on technical leadership and impact.

Engineering Director, Fundle.AI

Backend & Infrastructure Leadership

"Sujit leads our ADSR platform development, combining robust infrastructure with sophisticated backend systems. His expertise in Python, database architecture, and cloud infrastructure has been essential to our ad serving platform's success."

Director of Engineering, Paytm

Infrastructure Scaling

"During his 6 years with us, Sujit architected systems that scaled to handle 50M+ users. His disaster recovery planning saved us during critical outages, maintaining 99.99% uptime for our loyalty platform."

Senior DevOps Engineer

Team Leadership

"Working under Sujit's leadership was transformative. He mentored our team in modern DevOps practices, implemented comprehensive documentation, and created a culture of automation and excellence."

Contact

Let's Connect

Interested in discussing infrastructure challenges, leadership opportunities, or technical consulting? Get in touch.

Professional network & experience

GitHub

Technical projects & contributions

Email

kumarsujitroy@gmail.com

Direct communication