Headline

Developer at heart, architect by craft — payment gateways, commercial cards, systems that don’t fail quietly. Director @ Verifone. Introvert who thrives with extroverts.

About

Portfolio : https://thedevesh.com Payment systems fail in expensive, quiet ways — duplicate charges, settlement windows that blow past SLA, integrations that take a quarter to onboard a new bank. I've spent 19 years building systems that don't do that. At Verifone I lead a 10-person team across 30+ microservices, where we cut settlement processing from 8 hours to 45 minutes and shipped an idempotency framework guaranteeing exactly-once transaction handling across EMEA and US. At Fiserv I led a ~15-person org spanning backend, web, mobile and QA on a corporate card platform serving hundreds of banks. At SpendLabs I took a monolithic card platform to event-driven microservices without disrupting live banking customers. Before that, 12 years at TSYS. A theme runs through all of it: taking bespoke engineering out of customer onboarding. Configurable application forms for banks at TSYS, a plugin-based issuer integration layer at SpendLabs, automated multi-tenant file processing at Fiserv. New customer, config change, not a project. I work in event-driven backends — Java, Spring Boot, Scala, Akka, Apache Pulsar, gRPC, Elasticsearch, Kubernetes on AWS — and I still write production code. Cluster singletons across pods, Elasticsearch refresh semantics, exactly-once processing: the unglamorous parts are usually where the money gets lost. Developer at heart, architect by craft. An introvert who thrives with extroverts.

Location

Pune Division

AI stack

claude code

deepseek

langgraph

ollama

Qwen

Work experience

Director Cloud Engineering at Verifone, Mar 2025 - Present · 1 yr 5 mos, Pune District, Lead a 10-person engineering team owning 30+ microservices across the payments platform. Reduced settlement processing time by 90%, from 8 hours to 45 minutes, by re-architecting the settlement engine for parallel processing — materially improving settlement turnaround and operational headroom. Designed and deployed an enterprise-grade idempotency key framework guaranteeing exactly-once transaction processing, eliminating duplicate payment risk across EMEA and US payment ecosystems. Introduced Built-In Quality practices across the estate, shifting the testing strategy from unit-test-heavy to container-backed integration tests using Testcontainers — catching real integration failures before release and raising confidence in deploys across 30+ services.

Director Software Development at Fiserv, Jun 2021 - Mar 2025 · 3 yrs 10 mos, Pune District, Led a ~15-person organization across backend/DevOps/SRE, Angular web, iOS/Android, and QA, delivering a cloud-native corporate card platform for hundreds of banks across Europe and the US. Stayed hands-on throughout, personally designing and building core backend services in Scala and Akka. Built the file processing services that onboarded banks and corporate customers into the platform's multi-tenant model, ingesting partner files and provisioning accounts under the correct tenant — turning onboarding from a manual exercise into an automated pipeline. Scaled transaction retrieval to ingest and serve millions of card transactions daily with near real-time visibility for corporate customers, tuning Elasticsearch indexing and refresh behavior to hold query latency under load.

Technical Director at SpendLabs, Mar 2020 - Jun 2021 · 1 yr 4 mos, Pune District, Led the migration of a monolithic corporate card platform to an event-driven microservices architecture, re-architecting card issuance, account management, and transaction processing without disrupting live banking customers. Designed the target architecture on Scala and Akka, with gRPC + Protobuf for service-to-service contracts, Apache Pulsar as the event streaming backbone, and Elasticsearch for low-latency transaction search and real-time analytics. Used Akka cluster singleton actors as the backbone for ordered, single-writer processing of transaction events across Kubernetes pods, backed by a persistent transaction store — guaranteeing deduplication and exactly-once semantics under pod restarts and rebalancing. Built a plugin-based, processor-agnostic integration layer for issuer processors, turning new issuer onboarding into a configuration exercise rather than a bespoke project — supporting end-to-end card issuance, activation, transaction processing, and lifecycle management. Modeled the corporate hierarchy (Company → Control Account → Sub-Accounts, and Company → Individual Accounts) using Domain-Driven Design and CQRS, separating command and query paths to scale reads independently of writes. Deployed on AWS EKS with zero-downtime rollouts, horizontal scalability, and fault tolerance across the distributed cluster.

Manager Applications System Development at TSYS, Feb 2015 - Mar 2020 · 5 yrs 2 mos, Pune District, Managed a 10-person team spanning backend development and automation QA. Owned an enterprise self-service platform that let client banks customize their own online card application forms, built on Spring Boot, Freemarker templating, and PostgreSQL — removing engineering effort from every new bank's onboarding. Integrated TSYS Card Guard for real-time and post-transaction rule management, enabling dynamic fraud detection, card controls, and transaction authorization.

Internet Software Developer Senior G2 at TSYS, Aug 2013 - Feb 2015 · 1 yr 7 mos, Pune District, Maharashtra, India

Internet Software Developer Senior G1 at TSYS, Dec 2012 - Jul 2013 · 8 mos, Pune District

Software Executive at Infonox (A TSYS Company), Feb 2008 - Oct 2010 · 2 yrs 9 mos, Pune District

Education

B.E, Information Technology, Kavikulguru institute of technology and science

St. Joseph Convent Highschool