Senior Software Architect (.NET)

Carbon60•Toronto, ON

105d•$170,000 - $200,000•Remote

About The Position

OpsGuru, a Carbon60 Company, is seeking a Senior Software Architect to join their professional services delivery team. This role involves bridging the gap between complex business requirements and technical implementation, acting as a trusted advisor to clients. The architect will lead the design and delivery of diverse solutions, from greenfield development to migrating legacy systems into modern, cloud-native architectures. While the core focus is the Microsoft stack (.NET), the role requires technical versatility to adapt to diverse client environments and mixed-technology ecosystems.

Requirements

Senior-level experience in C# and .NET.
Extensive experience in both legacy (ASP.NET, .NET Framework 4.x) and modern .NET stack (ASP.NET Core, .NET 6/8+).
Deep, practical experience implementing Microservices, Domain-Driven Design (DDD), CQRS, and Event-Sourcing.
Strong experience designing for public cloud platforms (AWS, Azure, or GCP), including containerization (Kubernetes/AKS/EKS) and Serverless functions.
Extensive experience with Relational (SQL Server, PostgreSQL, Oracle) and proficiency with at least one NoSQL platform (CosmosDB, DynamoDB, MongoDB, Redis).
Proficiency using AI-assisted development tools (Cursor, Claude Code, GitHub Copilot) to accelerate code generation, refactoring, and testing.
Demonstrated ability to quickly adapt to new languages and frameworks outside of the Microsoft ecosystem when client needs dictate. A "polyglot" mindset is essential.
Proven experience working in a professional services or consulting environment. Must be comfortable managing client expectations, navigating ambiguity, and delivering outcomes within scope and budget.
Exceptional verbal, written, and presentation skills (English). Must be able to lead design discussions and defend architectural decisions to C-level executives and engineering teams alike.
Ability to plan and lead large-scale projects, including critical cutover and rollback events.

Nice To Haves

Experience with Java (Spring, Play, etc.)
Experience with NodeJS/TypeScript (Express, NestJS, etc.)
Experience with Python (Django, Flask, etc.)
Exposure to large-scale data processing and storage ecosystems (Apache Spark, Databricks, Snowflake, Kafka, or Hadoop).
Understanding of modern SPA frameworks (React, Angular, Vue) to effectively design API contracts.
Solutions Architect certifications in Azure or AWS.

Responsibilities

Lead the architectural vision for complex software systems, ensuring designs are scalable, resilient, and aligned with business goals.
Design and advocate for modern architectural patterns, specifically Domain-Driven Design (DDD), CQRS, Event-Sourcing, and Event-Driven Architecture.
Evaluate and select appropriate data stores, utilizing both relational (SQL) and non-relational (NoSQL) paradigms to transition applications from traditional RDBMS (SQL Server, MySQL, Oracle) to modern, fit-for-purpose targets (PostgreSQL, DynamoDB, MongoDB, Redis, etc.) where appropriate.
Drive application modernization initiatives, taking ownership of migrating legacy .NET Framework (4.x) applications to modern .NET 8+ environments.
Decompose monolithic applications into service-oriented or microservice-based architectures.
Refactor and re-architect systems to leverage cloud-native services (Containers, Serverless/Functions) rather than simple "lift and shift" strategies.
Act as the primary technical contact for clients, translating complex technical concepts, including ROI and cost-benefit analysis into clear business value for non-technical stakeholders.
Design and review systems against all core architectural pillars (Security, Reliability, Performance, Operational Excellence, and Cost Optimization) to ensure holistic quality.
Lead discovery sessions to define technical backlogs, estimate effort, and identify risks early in the engagement.
Mentor senior engineers, enforce code quality standards, and conduct architectural reviews.