RITWIKA GHATAK

Summary

Senior Solution Architect with 14+ years designing enterprise-grade, API-led platform architectures across large-scale transformation programs in the UK and Europe. Deep, hands-on expertise building cloud-native platforms on AWS (currently architecting a Travel eSIM platform from scratch), with additional experience on Azure, microservices, event-driven architecture, and Domain-Driven Design. Delivers REST API integration strategies, API orchestration, and API lifecycle management aligned to TMF standards, with security-by-design, IDAM, and DevSecOps embedded into CI/CD pipelines. Currently pursuing AWS Certified Solutions Architect certification.

Overview

Certification

years of professional experience

Work History

IT Solution Architect

Tata Consultancy Services | Vodafone UK

Newbury, West Berkshire

10.2021 - Current

Led end-to-end solution architecture for a Travel eSIM platform built cloud-native on AWS from the ground up, within the wider Device Lifecycle Management programme.
Defined API integration strategy across the platform, collaborating with Enterprise Architects to design scalable, industry-aligned solutions.
Designed and implemented API-led integration between COM and SOM systems, orchestrating order flows and enhancing enterprise data exchange.
Embedded DevSecOps principles and security-by-design practices into CI/CD release pipelines to improve platform resilience and delivery quality.
Produced HLD, LLD and solution architecture documents aligned to enterprise standards; led architecture governance and design reviews to identify risks and recommend mitigations.
Led multilingual front-end platform migration to facilitate international market expansion.

Solution Designer/Analyst

Tata Consultancy Services |Telefónica Germany GmbH

Hamburg

10.2017 - 09.2021

Drove OSM upgrade programme, adopting Agile, DevOps, and CI/CD practices to streamline development processes.
Transformed Oracle OSM to Camunda, applying event-driven and microservices architecture principles to modernise order orchestration and enhance system responsiveness.
Led functional ownership of Fixed OSS stack during major transition programme, conducting architecture risk and dependency assessments to ensure seamless integration.

Module Lead/Developer

Tata Consultancy Services | TDC A/S

Copenhagen

07.2012 - 09.2017

Owned critical credit evaluation module, implementing automation improvements that streamlined operations.
Led a team of 10 engineers delivering telecom provisioning platforms with zero customer-impact releases.
Developed OSM competency framework to enhance internal technical capability and support team growth.

Education

Bachelor of Technology - Information Technology

West Bengal University of Technology

Skills

Enterprise API architecture: REST APIs, API-led integration, API lifecycle management, TMF API implementation

Microservices, Event-Driven Architecture (EDA), Domain-Driven Design (DDD), SOA

Cloud-native architecture: AWS (primary, 2 years hands-on)

Security architecture: Identity & Access Management (IDAM), security-by-design, enterprise security frameworks

DevSecOps & CI/CD pipeline integration; resilience, scalability and reliability engineering

Legacy modernization to microservices; platform and API orchestration re-architecture

Agile, SAFe principles; architecture governance and programme-level frameworks

HLD, LLD & Solution Architecture Documentation (SAD); risk, dependency & design review leadership