Kallol Chakraborty
CAREER ROADMAP & TIMELINE

> cat ./experience_history.log

Software & AI engineer with 11+ years shipping cloud-native products, event-driven systems, and generative-AI features at scale across Wipro, Capgemini, IBM, and TCS.

ENTERPRISE ROLES AT
Wipro Capgemini IBM TCS
Wipro
[JULY 2023 - PRESENT]

Principal Consultant

Wipro | Kolkata, India
CURRENT ROLE
  • Shipped an SAP-certified Oil & Gas stock-transfer product from zero to production — owning requirements, data modeling, API design, certification, and rollout to global client sites — natively integrated with SAP S/4HANA OP 2023.
  • Built multi-tenant, cloud-native applications on a Node.js (CAP) service layer with modular Python (FastAPI/Flask) microservices, persisted on an in-memory columnar database (SAP HANA Cloud).
  • Designed asynchronous, decoupled event flows over a message broker (SAP Event Mesh) with CloudEvents, exposing OData V4 APIs and integrating third-party REST services for real-time warehouse, logistics, and document workflows.
  • Implemented fine-grained authorization with OAuth2/OIDC (XSUAA) scopes and role collections, plus token propagation and audit logging across all deployed services.
  • Cut environment setup from days to minutes by automating full cloud-landscape provisioning and CI/CD with Terraform and GitHub Actions (databases, destinations, services, user provisioning).
  • Built generative-AI proofs-of-concept combining LLMs, a message broker, Node.js services, and vector search (SAP HANA Vector Engine) for retrieval-augmented generation, automating document-heavy business workflows end to end.
  • Drove code-review standards and automated testing (Jest, Chai, pytest) with continuous deployment across DEV/TEST/PROD.
  • Mentored a cross-functional engineering team on architecture, clean-code, and security standards; owned escalation for production incidents and architecture decisions.
SAP BTP CAP (Node.js) Python SAP HANA Cloud Event Mesh Terraform
Wipro
[OCT 2021 - JULY 2023]

Senior Consultant

Wipro (Apple Account & CoE) | Kolkata
FULL-TIME
  • Led architecture and development of an SAP-certified enterprise product with Node.js (CAPM) and multi-threaded Python (Flask) on Cloud Foundry, extensibility-first from design through certification.
  • Engineered high-performance side-by-side extensions for S/4HANA with the ABAP RESTful Application Programming Model (RAP) — behavior definitions, actions, determinations, validations — seamlessly integrated with the product's Node.js services.
  • Reduced average response times on a high-traffic Apple global account by tuning OData endpoints, query patterns, and buffers through iterative profiling.
  • Won 1st Place in SAP Hack2Build (Americas Region) with an end-to-end RAP-based POC demonstrating S/4HANA side-by-side extensibility, managed/unmanaged scenarios, and event-driven integration.
  • Translated business requirements into technical blueprints and fit-gap analyses, presenting architecture recommendations on deployment models, extensibility options, and integration strategy.
SAP RAP Node.js Flask Apple Account Clean Core
Capgemini
[DEC 2019 - OCT 2021]

Consultant

Capgemini | Kolkata
FULL-TIME
  • Orchestrated the technical consolidation of HR environments during a corporate merger — migration strategy, code/configuration harmonization across landscapes, and cutover with minimal business disruption.
  • Migrated 8,000+ employees to a country-wide payroll platform, configuring schemas, retroactive accounting, and statutory reporting — receiving the Outstanding Delivery Award for execution quality and timeliness.
  • Built event-driven automation proofs-of-concept on a cloud IDE, synchronizing employee master data, org units, and payroll results between SaaS and on-premise HR systems.
  • Bridged business process owners, payroll specialists, and engineering teams through design workshops, UAT cycles, and hypercare support to ensure smooth go-live.
SAP SuccessFactors Employee Central Payroll SAP HCM Business Application Studio SAP BTP
IBM
[MAY 2019 - DEC 2019]

Senior System Engineer

IBM | Kolkata
FULL-TIME
  • Reduced code duplication by architecting enterprise services with object-oriented design patterns (Singleton, Factory, Strategy) as reusable class-based components across the HR services layer.
  • Engineered and optimized OData APIs (SEGW / Gateway) with CRUD operations, deep entities, and $expand / $filter projections, tuning the runtime for caching and reduced payload sizes.
  • Maintained 99.9% uptime on a self-service HR portal serving 10,000+ employees — triaging production incidents, applying corrective fixes, and improving workflow performance through RFC and BAPI tuning.
  • Aligned API contracts with Fiori and UI5 front-end teams and maintained technical documentation, unit tests, and code-quality gates in a regulated delivery environment.
OO ABAP OData / SEGW ESS/MSS BAPI / RFC Design Patterns
TCS
[MAR 2018 - MAY 2019]

Systems Engineer

Tata Consultancy Services | Kolkata
FULL-TIME
  • Maintained 99.9% availability as primary technical owner of mission-critical HR production environments supporting 15,000+ users, through proactive monitoring, monthly maintenance windows, and rapid incident resolution.
  • Cut database-heavy logic in a major retail implementation to native SQL and optimized query patterns, validating change-analysis findings to prevent regressions.
  • Managed release cycles across DEV/QA/PROD with clean dependency resolution and zero-downtime deployments for payroll-driven change requests.
  • Reduced repeat tickets by leading root-cause analysis for recurring incidents in a 24/7 on-call rotation, implementing preventive fixes and growing the knowledge base.
SAP HCM ABAP on HANA IS-Retail Performance Tuning Transport Management
Capgemini
[NOV 2014 - MAR 2018]

Associate Consultant

Capgemini | Kolkata
FULL-TIME
  • Migrated 50,000+ employee records across master data, organizational management, and payroll — extraction, transformation, field mapping, validation, reconciliation — earning the "Project Star" award for technical excellence.
  • Consolidated distributed employee data via a 15,000+ record rollout to a major-master architecture, establishing data governance rules and aligning organizational hierarchies across business units.
  • Maintained and enhanced personnel administration, organizational management, time, and payroll configurations, resolving change requests and fixing production issues at the root cause with code-level debugging.
  • Produced cutover runbooks, functional specs, and test scripts, coordinating UAT sign-offs with business owners to ensure data integrity and regulatory compliance of migrated payroll data.
SAP HCM Data Migration LSMW Major-Master Cutover

HONORS & AWARDS

Industry & Organizational Recognition
  • Hack2Build Winner Award – Americas Region
  • Hack2Build Finalist Award
  • Soaring Eagle Award
  • Project Star Award
  • On The Spot Award
  • Outstanding Performer Award
  • 1st Runner up in Digital Banner Making

EDUCATION

Academic Background

Master's Degree (MCA)

Computer Programming & Applications (2010 - 2013)

Maulana Abul Kalam Azad Univ. of Tech (WBUT)

Bachelor's Degree (BCA)

Computer Programming & Applications (2007 - 2010)

Maulana Abul Kalam Azad Univ. of Tech (WBUT)
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