Ajay Kumar Mahto

SRE (Site Reliability Engineer)

Hyderabad, Telangana, India10 yrs 9 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Expert in Site Reliability Engineering with a focus on UPI.
Automated infrastructure for high-performance payment systems.
Proven track record in cloud security and compliance.

Stackforce AI infers this person is a Fintech Infrastructure Engineer specializing in high-availability payment systems.

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Skills

Core Skills

Site Reliability EngineeringElectronic PaymentsApplication Design And DevelopmentDevopsPlatform EngineeringDevsecopsCloud SecurityCloud Infrastructure AutomationSoftware EngineeringCloud ImplementationSoftware Development

Other Skills

AWSAgileAmazon Web Services (AWS)AnsibleCCI/CDCSSCloud InfrastructureData Structures and AlgorithmsDockerElasticSearchGCPGoHTMLJava

About

A seasoned Site Reliability Engineer, adept in managing, scaling, and automating large-scale microservices infrastructure deployments with hands-on production experience on nation-scale applications.

Experience

National payments corporation of india (npci)

3 roles

Senior Lead - Site Reliability Engineering - UPI

Promoted

Jun 2025 – Present · 9 mos · Hyderabad, Telangana, India

Ensure high availability & reliability (24x7, 99.999% uptime) of UPI.
Monitor and optimize transaction performance & scalability.
Handle incident response, RCA, and on-call support.
Ensure security, compliance (RBI/PCI-DSS), and fraud prevention.
Automate infrastructure, deployments, and monitoring.
Maintain observability (logs, metrics, traces) for UPI services.
Collaborate with banks/PSPs and ensure smooth settlements.
Drive SLO/SLI/SLA adherence & continuous improvement.

ObservabilitySite Reliability EngineeringElectronic PaymentsUPIPythonJava+10

Lead - Application Design and Development - UPI

May 2024 – Jun 2025 · 1 yr 1 mo · Hyderabad, Telangana, India

Played a key role in designing and developing a high-performance UPI payment application, ensuring compliance with NPCI standards and delivering seamless digital payment experiences.
Helped build scalable systems with high availability requirements and automated deployments
Worked closely with cross-functional teams of developers and QA engineers in Agile environment
Supported third-party payment ecosystem integrations

Electronic PaymentsUPIPythonJavaCAgile+1

Lead DevOps Engineer - Platform Engineering

Jun 2021 – May 2024 · 2 yrs 11 mos · Hyderabad, Telangana, India

Played an instrumental role in transforming India's digital payments infrastructure by contributing to NPCI's flagship products including UPI, NETC, and IMPS platforms.
Core Contributions:
Engineered scalable solutions for NextGen payment platforms processing 10B+ monthly transactions
Modernized legacy systems by implementing CI/CD pipelines, reducing release cycles by 40%
Automated 70% of data center operations through infrastructure-as-code (Terraform/Ansible)
Spearheaded DevSecOps adoption by integrating SAST/DAST tools into development workflows
Collaborated with cross-functional teams to implement RBI-mandated security enhancements
Technical Impact:
✓ Enhanced NPCI platform reliability to 99.995% availability
✓ Reduced critical vulnerability resolution time from 72hrs to <4hrs
✓ Implemented real-time monitoring for 50+ mission-critical payment services

DevOpsCI/CDTerraformAnsibleSecurity EnhancementsCloud Infrastructure+1

Grab

DevSecOps Engineer

Apr 2019 – Jun 2021 · 2 yrs 2 mos · Bangalore, India

Security Modernization & Compliance
Established organization-wide cloud security baselines for 2000+ AWS/GCP assets, reducing vulnerabilities by 65%
Automated PCI-DSS/GDPR compliance checks into CI/CD pipelines, preventing 120+ risky deployments
Built security guardrails that decreased cloud incidents by 60% YoY
Security Enablement & Scalability
Developed real-time security dashboards adopted by 30+ engineering teams, cutting risk response time by 40%
Engineered secrets management infrastructure serving 500+ apps, eliminating credential exposure risks
Designed scalable platforms for security tooling that processed 50M+ daily security events

Cloud SecurityAWSGCPCI/CDSecurity DashboardsDevSecOps

Paytm

DevOps Engineer

Apr 2017 – Apr 2019 · 2 yrs · Noida Area, India

Cloud & Infrastructure Automation
Automated provisioning of 500+ containerized microservices using Docker/Kubernetes with Terraform and Saltstack
Reduced deployment times by 70% through Python-based automation scripts for CI/CD pipelines
Managed 200+ AWS EC2 instances using Ansible, achieving 99.95% uptime for critical services
Database & Platform Ownership
Implemented MySQL DBaaS solution serving 50+ product teams with automated backups/scaling
Served as DevOps SPOC for Notification/Promotions systems handling 10M+ daily transactions
Optimized AWS infrastructure costs by 30% through right-sizing and auto-scaling policies

DockerKubernetesTerraformSaltStackAnsibleMySQL+2

Snapdeal

Software Engineer

Jul 2015 – Apr 2017 · 1 yr 9 mos · Gurgaon, Haryana

Project Cirrus - OpenStack Cloud Implementation
Contributed to building Snapdeal's private cloud platform serving 5000+ VM instances using OpenStack
Helped automate infrastructure provisioning using Heat templates, improving deployment efficiency
Assisted in implementing Ceph storage solutions managing petabytes of e-commerce data
Supported development of multi-tenant networking capabilities for 200+ teams
Participated in cost optimization efforts that reduced cloud expenses significantly

OpenStackHTMLCSSJavaScriptSoftware EngineeringCloud Implementation

Tata steel its

Summer Intern

May 2014 – Jun 2014 · 1 mo · Jamshedpur, Jharkhand, India

Project: Design & Development of Inventory Management System for Long Products Division
Collaborated with cross-functional teams to analyze inventory workflows for steel long products
Designed and prototyped a responsive web portal using HTML/CSS/JavaScript to track material movement
Implemented basic CRUD functionality to manage stock levels, location tracking, and material grades
Presented final solution to department heads, receiving recognition for improving visibility of 50,000+ inventory items

HTMLCSSJavaScriptSoftware Development