CGI - Senior Technical Architect - Full Stack Development

Job Description : We are looking for an experienced Senior Technical Architect with strong expertise in .NET Full Stack architecture, microservices, event-driven architecture, Kafka, API design, API security, React/Angular, MongoDB, and Graph Database technologies.The ideal candidate should be a hands-on architect who can design scalable enterprise applications, define microservice boundaries, build secure APIs, guide full-stack engineering teams, and drive modernization from monolithic systems to modern cloud-native and event-driven platforms.This role requires strong backend architecture depth with good frontend exposure. The candidate should be comfortable working with business stakeholders, product teams, engineering squads, security teams, and platform/cloud teams.Key Responsibilities : - Design and architect enterprise applications using .NET Core / .NET 6+ / .NET 8, C#, ASP.NET Core Web API, React or Angular.- Lead architecture for microservices-based distributed systems, including service boundaries, ownership models, API contracts, and data ownership.- Design event-driven architecture using Kafka or similar messaging platforms, including topics, partitions, event contracts, consumer groups, retries, and DLQ strategy.- Define API strategy covering REST APIs, API gateways, versioning, throttling, observability, lifecycle governance, and secure API integration.- Work on backend data architecture using SQL Server, MongoDB, Graph DB / Neo4j, caching, and enterprise integration layers.- Drive modernization from legacy / monolithic applications to microservices, cloud-native, API-first, and event-driven architecture.- Create and review HLD, LLD, architecture diagrams, sequence diagrams, integration diagrams, deployment architecture, ADRs, and technical roadmaps.- Design secure systems using OAuth2, OIDC, JWT, SSO, RBAC, claims-based authorization, API security, secrets management, OWASP, and vulnerability remediation.- Design resilient systems using retry, timeout, circuit breaker, saga, outbox pattern, idempotency, dead-letter queues, and eventual consistency.- Collaborate with frontend teams on React / Angular SPA architecture, reusable components, secure API integration, state management, and performance optimization.- Support architecture governance, technical design reviews, risk assessments, solution feasibility analysis, and production readiness.- Mentor developers, senior engineers, and technical leads across architecture, design, performance, security, and delivery excellence.Mandatory Skills : Skill Area : Required Expertise : - Backend / .NET : C#, .NET Core, .NET 6+, .NET 8, ASP.NET Core, Web API, REST API, async programming, dependency injection, middleware, logging, exception handling, health checks, and API performance tuning.- Microservices : Microservices architecture, distributed systems, service boundaries, data ownership, API contracts, deployment independence, resiliency, observability, and scalability.- Kafka / EDA : Kafka topics, partitions, consumer groups, offset management, retries, DLQ, schema evolution, ordering, consumer lag, idempotent consumers, and event-driven design.- API Security : OAuth2, OpenID Connect, JWT, SSO, RBAC, claims-based authorization, secure token handling, API gateway policies, OWASP, and secure coding.- API Management : Apigee, Azure API Management, AWS API Gateway, Kong, or similar platforms with versioning, throttling, policy enforcement, monitoring, and lifecycle governance.- Data : SQL Server design and tuning, stored procedures, indexing, transactions, MongoDB / NoSQL, Graph DB / Neo4j, caching, data modeling, and polyglot persistence.- Frontend : React or Angular, TypeScript, JavaScript, SPA architecture, routing, state management, reusable components, secure API integration, and frontend performance.- Architecture : Clean architecture, layered architecture, hexagonal architecture, DDD, SOLID principles, design patterns, HLD, LLD, ADR, and technical roadmaps.- Cloud / Observability : AWS or Azure, Docker, Kubernetes, logging, monitoring, metrics, alerts, distributed tracing, APM, OpenTelemetry, Application Insights, CloudWatch, ELK, Splunk, Grafana, or Prometheus.Preferred Skills : - Experience with Micro Frontend architecture / Module Federation.- Experience with CQRS, Saga pattern, Outbox pattern, API gateway pattern, strangler pattern, and event sourcing concepts.- Experience with Redis, Elasticsearch, Cosmos DB, DynamoDB, or other specialized data stores.- Experience in enterprise modernization, cloud migration, or large-scale digital transformation programs.- Experience with OpenTelemetry, Splunk, ELK, Grafana, Prometheus, Application Insights, or CloudWatch.- Exposure to AI/ML integration, RAG-based systems, or GenAI-assisted engineering practices.- Cloud or architecture certifications such as AWS Solutions Architect, Azure Solutions Architect, or equivalent.- Experience in telecom, banking, healthcare, insurance, retail, or enterprise product domains.Technical Skills : Area : Keywords : - Backend : .NET Core, .NET 6+, .NET 8, C#, ASP.NET Core, Web API, REST API, Microservices, Distributed Systems.- Frontend : React, Angular, JavaScript, TypeScript, HTML5, CSS3, SPA Architecture, Micro Frontend.- Messaging & Integration : Kafka, Event-Driven Architecture, RabbitMQ, Azure Service Bus, API Gateway, Apigee, REST, Enterprise Integration Patterns.- Security : OAuth2, OpenID Connect, JWT, SSO, RBAC, API Security, OWASP, Secure Coding, Secrets Management.- Database : SQL Server, MongoDB, Neo4j, Graph DB, NoSQL, Redis, Data Modeling, Performance Tuning.- Cloud & Platform : AWS, Azure, Docker, Kubernetes, CloudWatch, Application Insights, OpenTelemetry, Observability, Platform Engineering.- Architecture : HLD, LLD, ADR, DDD, SOLID, Clean Architecture, Design Patterns, Saga, Outbox, CQRS, Circuit Breaker, Idempotency, Eventual Consistency.Candidate Profile : - 12-15+ years of software engineering experience with strong background in .NET full-stack development.- Minimum 4+ years of experience in architecture, solution design, or technical leadership.- Strong hands-on experience designing and implementing microservices, APIs, Kafka/event-driven systems, and secure backend platforms.- Good understanding of frontend architecture using React or Angular.- Strong backend depth with exposure to SQL Server, MongoDB, Graph DB / Neo4j, and Kafka.- Ability to lead technical discussions with architects, product owners, business stakeholders, and engineering teams.- Ability to mentor developers, review technical designs, and drive architecture from concept to production.Interview Focus Areas : - End-to-end architecture of enterprise applications.- Microservices design and service boundary decisions.- Kafka-based event-driven architecture.- API security using OAuth2, OIDC, JWT, and API gateway.- Performance tuning in .NET APIs and databases.- SQL Server, MongoDB, and Graph DB use cases.- React / Angular architecture and frontend integration.- Resiliency patterns such as retry, circuit breaker, DLQ, saga, and outbox.- Cloud-native architecture and production readiness.- Architecture governance, HLD/LLD, and technical leadership. (ref:hirist.tech)