Jul 2024 – Jul 2025 · 1 yr

• Site Reliability Engineer 3 on the Tech Infrastructure Team, responsible for the core UPI banking infrastructure.
• Architected and deployed new, compliant Payment Service Provider (PSP) environments for major partners, including Axis Bank and Yes Bank. This involved creating novel solutions for unique disconnected environments and expanded the organization's capacity for handling UPI transactions.
• Managed and executed successful multi-datacenter Disaster Recovery (DR) drills for critical Axis and YBL PSP infrastructures, ensuring business continuity and service resilience for millions of users.
• Spearheaded significant capacity expansion projects and complex database migrations for the UPI platform, directly supporting a growing user base and increasing transaction volumes while improving overall service reliability (SR).
• Drove research and implementation of key infrastructure enhancements to improve performance and stability, including developing an Nginx rebalancer script for better response times, migrating core DNS services to an Anycast setup, and stress-testing new hardware to confirm infrastructure stability.

Aug 2021 – Jun 2024 · 2 yrs 10 mos

• Developed least-time algorithm for nginx+ to shape upstream network traffic to banks that
• improved success rates by 33% and reduced p99 latencies by 90%
• Designed and implemented high-availability and DR for largest banks in India (Yes, Axis and
• ICICI) for a 15-minute failover of 400 million daily QR-based payments
• Infrastructure Management as code using Ansible for building MariaDB Galera clusters with
• support for templated configurations, reducing provisioning time by 77%
• Performed database splits and upgrades for sharded-MariaDB (Galera) increasing capacity by 70%
• Developed alerting using Riemann events that monitored latency and errors to improve MTTD
• Benchmarked and deployed stream compression using Zstd to reduce log backup and mariabackup
• time by 60% with improved network utilization for 40 PB of data per day
• Improved SSL transparency alerts by scripting OpenSSL s_client based monitoring
• Debugged complex issues: DNS PTR failures (djbdns), Linux Virtual Server healthchecks, online
• DDL, DB migrations, BGP ECMP routing, synchronous/async replication, keepalived, KVM
• Deployed local container registry as a cache for Azure to speed up deployments by 98%
• Deployed Gitlab with user lifecycle management and automated backups to OpenZFS
• Designed network and access policies for Thales HSMs to secure KYC communication

Aug 2020 – Jul 2021 · 11 mos · Gurgaon, Haryana, India

• Working as a software engineer with focus in DevOps.
• + Implemented ELA licensing model within DARTS to onboard new developers and infrastructure instantly
• + Mitigated unplanned shutdowns of the licensing daemon to ensure site reliability
• + Worked on application clustering to enable High Availability via load balancing
• + Performed zero downtime database migration and schema model upgrades for business critical authorization application using A/B schema strategy
• + Built elaborate pipelines for infrastructure automation and maintenance
• + Config as code via Ansible
• + Led Airtel's biggest business intelligence application upgrades to modern HTML5 compliant standards including responsibilities like ownership, delegation and communication with external stakeholders.
• + Centralized password management for ephemeral functional user passwords and painless password rotation for legacy systems
• + Building modern secrets management at Airtel using Hashicorp Vault.
• Skills: Ansible, Jenkins, Shell, Linux, Systems Architecture, Public key cryptography, OracleDB, Ab Initio, Apache Hadoop, Hashicorp Products

Jan 2019 – Aug 2020 · 1 yr 7 mos

• ★ Involved in a Financial Services project providing middleware engineering and troubleshooting for applications including but not limited to:
• + Ab>Initio (Co>Operating System, Application Hub, Control>Center, EME, GDE, and Ab-Apps)
• + IBM WebSphere
• + Apache Tomcat
• + Apache, IHS, Nginx
• + Big Data (Hadoop integration)
• + Red Hat Enterprise Linux (releases 5, 6 and 7)
• + Databases (Oracle, MongoDB)
• + Chef
• + Talend
• ★ Automated the builds and validations of Ab Initio on new Big Data Servers and standardized the build process
• ★ Automated setup of bulk passwordless SSH connectivity on new Hadoop Clusters
• ★ Lead a key renewal activity for Ab Initio servers and developed a shell script to mass renew licenses globally via a One-Touch workflow.
• ★ Wrote code for hostname-key implementation on global Ab>Initio hosts that reduced over a month of manual efforts to a few minutes via centralized license management
• ★ Pioneered process improvements leading to decreased incident count (Emulating the Co>Operating system install to cut the setup time, generating customized reports, multiplexer/Kerberos session layer maintenance, instantiated tomcat startup and more)
• ★ Involved in a sub-project that aims to automate the startup of essential application services through systemd/init.d shutdown snapshots that will lead to 50+ hours of efforts saved per week post-reboot/patching making the hosts highly available
• ★ Involved in high impact, critical project deliverables as well as onboarding new middleware integration (Ex - CyberArk integration, Disaster Recovery)
• ★ Involved in process improvements like the migration of Ab Initio jobs to dynamic layouts, Hadoop cluster expansions, RHEL 7 in-place upgrades
• ★ Deep Expertise in Linux, Middleware environment
• ★ Recognized contributor to my project, awarded as Best Debutant for Q3, 2019
• Skills:
• + Shell Scripting
• + Python
• + Perl
• + RHEL administration
• + Ab Initio administration

Sep 2018 – Dec 2018 · 3 mos

• ★ Unit: Cloud, Infrastructure, and Security
• ★ Attended corporate training courses in:
• + Python
• + SQL
• + Powershell Scripting
• + Red Hat Enterprise Linux
• + Microsoft Active Directory
• + Microsoft Exchange
• + Rights Management Services
• + Windows Deployment Services
• + Computer Networks
• + Design Thinking
• + Management & Organizational skills

Apr 2012 – Sep 2013 · 1 yr 5 mos · Worldwide

• Worked on a substitute for Installous and Apptrackr when the parent forum Hackulous was shut down. ipastore was an iOS application/website that provided third party applications and trials for iOS devices. The team consisted of 6 members. My responsibilities included:
• ★ Managing the backend (nginx, haproxy, php, varnish, mariadb, redis and memcached configurations across our master servers)
• ★ Building/replicating the hosting stack
• ★ Scaling the web application via database optimization & caching, application layer caching and edge content delivery (+1 million page views per day)
• ★ Automating On and Off-site backups to Amazon Glacier for application and databases
• ★ Implementing and testing caching techniques (edge, fastcgi, application opcode and database caches)
• ★ System Security & Stability
• ★ Managing iptables and nginx block rules to mitigate DDOS, brute-force and throttle suspicious attempts
• ★ Penetration testing
• ★ Tweaking system parameters for high performance and high availability
• ★ Forum interaction
• ★ Mail Server (Exim4, Postfix)
• ★ DNS (Cloudflare) and much more
• ★ Managing distributed Linux servers