Lead architecture, design and delivery of enterprise-scale MERN applications while remaining deeply involved in solutioning, coding, reviews, performance optimization, cloud-native implementations, and engineering governance. The role balances technical leadership with business and stakeholder engagement. Job Description: Required Experience: 14-20 Years Team Management- Yes Key Relationships: Product, Delivery, Architecture, Security, DevOps / SRE A senior role accountable for target architecture, engineering practices and delivery governance across a polyglot engineering platform spanning React, TypeScript, Node.js, NestJS, MongoDB/Mongoose, GraphQL Federation, Kafka, Python/FastAPI and n8n-based automation. You set target architecture and engineering standards, and stay close enough to the code to assure designs you approve. You own identity, data, event-driven and AI-assisted engineering architecture, translating strategy into a funded roadmap for the engineering team and its sub-pods. Key Responsibilities: Define the target technical architecture for the platform, including architecture principles, reference patterns, and the roadmap from current to target state. Govern architecture decisions through documented decision records, design review, and conformance checkpoints, escalating material trade-offs for approval. Architect the React/TypeScript frontend, covering component structure, state management, performance budgets, and accessibility standards. Direct backend service architecture in Node.js/TypeScript (NestJS), including service boundaries, API contracts, resilience patterns, and versioning strategy. Define the data architecture across MongoDB, covering schema and access-pattern design, indexing strategy, data lifecycle, and integrity controls. Own the GraphQL Federation architecture: supergraph composition, subgraph boundaries, schema contracts, entity resolution, and breaking-change policy. Establish event-driven architecture on Kafka, defining topic and event contract design, partitioning, delivery semantics, and schema evolution rules. Set the identity and access architecture, covering authentication and authorization flows, token handling, session policy, and least-privilege service access. Guide the Python/FastAPI service architecture, defining where it is the correct tool, its contract and packaging conventions, and its integration with the wider platform. Scope and constrain n8n usage to workflow automation and integration orchestration, defining the guardrails that distinguish automation workflows from engineered application services. Own the AI architecture, covering model integration and routing, prompt and tooling boundaries, evaluation criteria, and safety and cost controls. Assure evidence-based application readiness for Docker and Kubernetes, ensuring applications correctly consume platform-owned Helm charts and GitHub Actions pipelines rather than duplicating them. Set runtime performance and observability standards, including Azure Cache for Redis caching patterns and Application Insights instrumentation, tracing, and alerting. Partner with the engineering team and its sub-pods to raise engineering practices, embed the testing strategy across unit, integration, contract, and end-to-end layers, and sustain predictable delivery flow. Must Have Skills: Proven technical leadership of an engineering team at Lead Technical Architect or Principal Architect scope. Deep expertise in TypeScript, React, Node.js, NestJS, MongoDB/Mongoose and Web Components/micro-frontends. GraphQL schema design and federated graph architecture (GraphQL Federation), including subgraph composition and contract versioning. Experience with event-driven architecture using Kafka, Schema Registry and Avro, including schema evolution and compatibility governance. Experience with identity and access architecture: OAuth2/OIDC, Okta, service-account token exchange and ABAC. Working knowledge of Python/FastAPI in a polyglot service environment. Experience integrating AI capabilities in production systems, including Azure OpenAI and Anthropic model routing, with attention to prompt governance, token-cost control and PII safeguards. Strategy and architecture governance in a cross-functional environment. Cloud-native, distributed systems design with deployment readiness ownership for Docker/Kubernetes applications consuming platform-owned Helm/GitHub Actions. Demonstrable accountability for delivery, reliability and security outcomes. Established testing and quality practice across Jest, React Testing Library, Playwright and pytest. Track record of establishing engineering practices and architecture governance that scale across a complex organization. Strongly Preferred / Nice to Have: TOGAF certification or equivalent structured architecture practice. Kubernetes, Docker, Infrastructure as Code and DevSecOps experience beyond core application readiness. Legacy modernization and platform re-architecture at scale. Platform engineering or SRE practice — service level objectives, observability and operational resilience beyond core responsibilities. Prior integration delivery against Media ocean Prisma or comparable media buying and finance platforms. Microsoft Certified: Azure Solutions Architect Expert or equivalent AWS certification Location: DGS India - Bengaluru - Manyata N1 Block Brand: Merkle Time Type: Full time Contract Type: Permanent Can’t find a suitable job? Sign up for job alerts tailored to your interests and be first in line for new opportunities. About dentsu For over 120 years, innovation has been a core tenet of our offering – exploring new ways to reach, engage and nurture relationships with audiences. Together we drive a multiplier effect for clients at a global scale, through the development of Integrated Growth Solutions that are underpinned by our promise to clients: innovating to impact. Be a force for good. Sustainability is a vital part of our business and an important area of focus for our clients. We’re leading the way – helping to build a more sustainable planet. Dream loud. In this moment of transformation, we need our people to be fearless, embracing change and ambiguity, driven by the love for their work and excitement for the future. Team without limits. We create opportunities for connection and collaboration between our colleagues and clients, building a sense of belonging and having some fun along the way. Find out more about us Who we are Our Social Impact Our work

Engineering Architect - Full Stack / MERN.

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