Mahabir Singh

Senior Software Engineer

Bengaluru, Karnataka, India11 yrs 5 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

11+ years in backend engineering and distributed systems.
Expert in PCI-compliant payment systems and event-driven architectures.
Led development of high-scale systems supporting 20M+ users.

Stackforce AI infers this person is a Fintech Backend Engineer with expertise in high-scale distributed systems.

Contact

mahabir.singh@zohomail.in LinkedIn

Skills

Core Skills

MicroservicesJavaResiliency

Other Skills

Spring WebfluxApache KafkaSpring BootdockerKubernetesMemcachedSpring CloudMicrosoft AzureGoogle Cloud Platform (GCP)PostgreSQLKafkaOracle DatabaseAmazon Web Services (AWS)HazelcastEureka

About

Senior Backend Engineer with 11+ years of experience designing high-scale distributed systems in payments, dig- ital wallets, and personalisation. Expertise in PCI-compliant payment systems, event-driven architectures | Distributed Systems | Java, Spring Boot, Kafka | Event-Driven Microservices | PCI-Compliant | AWS & Azure | Cassandra | postgres.

Experience

11 yrs 5 mos

Total Experience

2 yrs 3 mos

Average Tenure

4 yrs 3 mos

Current Experience

Walmart

Senior Software Engineer

Mar 2022 – Present · 4 yrs 2 mos · Bengaluru · On-site

Architected and led development of distributed Spring Boot microservices across international payments,
personalization, digital wallet, and loyalty systems, supporting 20M+ users and 10k TPS with 99.99% SLA,
driving scalability and low-latency system design
Designed and owned a PCI-compliant payment orchestration system integrating tokenization, PayU, and
loyalty services, implementing idempotency, retry strategies, and reconciliation flows to ensure consistent
and fault-tolerant transaction processing.
Built and scaled a digital wallet platform supporting balance, load, spend, refund, and transaction history,
leveraging event-driven architecture with Kafka (DLQ, retries, event versioning) to ensure cross-system
consistency and resilience.
Led production reliability and cross-team architecture initiatives, improving system stability through ob-
servability, incident management, and API contract design, influencing scalability and integration across
multiple domains.

Spring WebfluxApache KafkaJavaSpring BootdockerKubernetes+7

Walmart labs india

Software Engineer III

Mar 2020 – May 2022 · 2 yrs 2 mos · Bengaluru

Designed and owned a PCI-compliant payment orchestration system integrating tokenization, PayU, and
loyalty services, implementing idempotency, retry strategies, and reconciliation flows to ensure consistent
and fault-tolerant transaction processing.
Built and scaled a digital wallet platform supporting balance, load, spend, refund, and transaction history,
leveraging event-driven architecture with Kafka (DLQ, retries, event versioning) to ensure cross-system
consistency and resilience.

Apache KafkaJavaSpring BootSpring WebfluxMicrosoft AzureOracle Database+3

Ibm

Advisory System Analyst

Mar 2019 – Mar 2020 · 1 yr · Bangalore

• Designed and developed GNSS Correction Data service to transmit satellite correction data (GPS, NAVIC, etc.) enabling high-precision vehicle positioning for autonomous driving, and ensured high availability and reliability in production with 99.99% service uptime.

JavaSpring BootResiliencyApache KafkaSpring CloudHazelcast+3

Mercedes-benz research and development india

Engineer

Mar 2017 – Feb 2019 · 1 yr 11 mos · Bangalore Urban · On-site

Built vehicle control microservices enabling standardized command APIs.

JavaApache KafkaSpring BootSpring CloudHazelcastdocker+6

Hcl technologies

Software Engineer

Nov 2014 – Feb 2017 · 2 yrs 3 mos · Bangalore Urban · On-site

Developed state machine to streamline Deutsche Bank account opening, managing stages such as T&C acceptance, KYC, account setup, and virtual debit card issuance.

JavaSpring FrameworkApache Kafka