Position Summary: We are seeking a Tech Lead .NET with a focus on architecture and technical leadership for high-demand corporate solutions built on microservices, APIs, and complex integrations. Key Highlights: 1. Lead technical teams and serve as the architectural decision authority 2. Participation in high-impact corporate projects 3. Technical challenges in architecture, performance, and scalability At KEY Solutions, an Information Technology consulting firm, we are seeking a Tech Lead .NET with a focus on architecture and technical leadership to participate in high-demand corporate solutions built on microservices, APIs, and complex integrations. Modality: \[On-site / Hybrid / Remote – to be agreed with the client] Start Date: Immediate **Responsibilities** * Lead technical teams and serve as the architectural decision authority * Design end\-to\-end solutions (backend, APIs, integrations, and frontend at the architectural level) * Define development standards, best practices, and code quality * Design and evolve backend services in .NET (ASP.NET Core) * Build and govern REST APIs (versioning, security, contracts, validation) * Optimize performance and resilience (async/await, caching, retries, circuit breaker with Polly) * Design integrations with external systems (REST, SOAP, events, webhooks), ensuring traceability and idempotency * Model data (SQL/NoSQL), asynchronous processes (queues/events), and scheduled jobs * Ensure quality through automated testing (unit, integration, contract testing) * Oversee deployments, observability (logs, metrics, traces), and troubleshooting * Participate in CI/CD strategy and cloud deployments (Azure) * Mentor the technical team (code reviews, technical sessions, coaching) * Coordinate with business units, QA, frontend, DevOps, and external vendors **Requirements** **Core** * Degree in Systems Engineering, Computer Science, or related field * \+8 years of software development experience (.NET backend) * \+3 years leading technical teams * Experience with distributed or high-demand systems * Intermediate English **Backend .NET** * .NET (6/7/8\+) * ASP.NET Core (Web API, MVC) * Asynchronous programming (async/await) and concurrency handling * REST API design (versioning, validation, security, documentation) * SOLID principles, DDD, and patterns (Clean Architecture, CQRS where applicable) * Security (OAuth2, JWT) * Microservices and decoupled architecture * REST / SOAP / Webhook integrations * Messaging and events (Azure Service Bus or similar) * Resilience patterns (Retry, Circuit Breaker, Bulkhead \- Polly) * Design of scalable and fault-tolerant systems **Database / SQL** * Proficiency in SQL (modeling, indexing, query optimization) * Experience with SQL Server / Azure SQL * Entity Framework Core (transactions, tuning, migrations) **Cloud – Microsoft Azure (Desirable)** * App Services * Azure Storage * Azure SQL Database * Azure AD (SSO) * Experience in cloud deployments **DevOps / Quality** * Azure DevOps (CI/CD pipelines) * Git * Maven / equivalent build tools * SonarQube * Automated testing (xUnit, NUnit, MSTest) * Monitoring, observability, and troubleshooting **Frontend (Desirable)** * Angular (integration and architectural level) * API consumption, error handling, and authentication * Concepts of performance, modularity, and state management **Automation / Bots (Differentiator)** * Experience with Microsoft Bot Framework * Integration with Azure Language Studio * Design of conversational flows * Bot state and context management **AI-Assisted Engineering (Desirable)** * Use of AI tools for code development and testing * Ability to assess quality and risks of AI-generated code * Best practices in AI\-assisted development **Soft Skills** * Technical leadership and mentoring * Effective communication * Analytical capability (functional and technical) * Decision-making and architectural judgment * Collaborative work and results orientation **We Offer** * Participation in high-impact corporate projects * Technical challenges in architecture, performance, and scalability * Continuous professional growth * Flexible work modality * Competitive market-aligned compensation **Application** * Submit an updated CV indicating: Salary expectation Availability talento@keysolutions.com.pe Subject: TechLeadDotNet \- LS202604 \- FirstNameLastName Job Type: Full-time Work Location: Hybrid in San Isidro, Lima