# Staff Software Engineer > Weekday AI · Chennai, India · Full-time · Posted 2026-06-16 **Workplace:** on_site **Department:** Weekday's Client via platform ## 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 raising the engineering bar. **Skills & Qualifications** • 8+ years of backend engineering experience with a strong track record delivering production-grade Java systems. • Deep expertise in hexagonal architecture (ports & adapters) — proven ability to design domain cores fully decoupled from infrastructure layers. • Strong Java 21 and Spring Boot 3.x expertise with event-driven, microservices-first design.  • Strong experience with Kafka — consumer groups, partition design, offset management, idempotent consumers, and event-driven service integration. • Proven experience with MongoDB: document schema design, indexing, aggregation pipelines, and multi tenant isolation patterns. • Strong PostgreSQL experience: complex schema design, query optimization, migration management. • Experience with Cosmos DB or equivalent globally distributed key-value stores: partition key design, consistency tuning, high-throughput read/write patterns. • Solid experience with Elasticsearch: index design, search query optimization, relevance tuning. • Experience with Redis or Aerospike for high-throughput caching and session/state management. • Strong understanding of distributed systems: service boundaries, data consistency, idempotency, retries, and circuit breaking on AWS (EKS, MSK). **Preferred Skills** • Experience with Temporal for durable workflow orchestration.  • Familiarity with MCP tool registration patterns and agentic platform integration. • Working knowledge of Python for AI/ML pipeline integration (scoring models, feature serving, LLM gateway patterns). • Prior experience building data platforms, real-time analytics systems, or AI-native SaaS products. ### Must-have skills Java, Kafka, Artificial Intelligence ### Good-to-have skills Agentic AI, Event Driven, AI Platform ## Apply [Apply at Weekday AI](https://apply.workable.com/weekday-1/j/B487D11516/apply) --- Powered by [Workable](https://www.workable.com)