Description
This role is for one of the Weekday's clients

Min Experience: 6 years
Location: Chennai
JobType: full time

We are seeking a Staff Backend Engineer to design and build scalable, AI-native backend services that power customer intelligence, campaign orchestration, and attribution at automotive retail scale. This role is the critical technical anchor — defining hexagonal architecture patterns, owning service boundaries, driving AI integration patterns, and setting the engineering bar for the entire team.

Requirements
Key Responsibilities
• Architect Java (Spring Boot 3.x) microservices using hexagonal architecture — defining clean domain cores, port interfaces for persistence (MongoDB, PostgreSQL, Cosmos DB), and adapter implementations for Kafka, Elasticsearch, Redis/Aerospike, and external APIs.
• Own core domain models and service boundaries end-to-end: from initial hexagonal design through production operation, Kafka event contracts, and iterative enhancement.
• Build scalable,



secure REST APIs and robust Kafka-based event-driven pipelines that consume and produce events across multiple source systems.
• Design MongoDB document schemas and PostgreSQL relational schemas for high-throughput, multi-tenant workloads — with deep attention to indexing strategy, TTL, and tenant isolation patterns.
• Design Cosmos DB data models for high-throughput event and state storage — partition key strategy, consistency levels, and TTL configuration.
• Design and implement durable campaign execution workflows using Temporal.
• Establish and own AI-native integration patterns: MCP tool registration, scoring model serving contracts, LLM gateway integration, and agentic workflow design.
• Identify and resolve performance bottlenecks across services, Kafka pipelines, data layers, and Elasticsearch query performance.
• Ensure all systems meet reliability, scalability, and observability standards.
• Mentor senior, mid-level, and junior engineers — setting and consistently rai

📌 Staff Software Engineer (Chennai)
🏢 Weekday AI
📍 Chennai