Senior .Net Developer responsible for designing and maintaining enterprise-level applications. Collaborating with cross-functional teams to deliver scalable software solutions and drive business goals.
Responsibilities
Design and implement scalable and efficient software architectures.
Develop and maintain enterprise-level applications using C#, ASP.NET, and related technologies.
Identify and resolve complex software issues and technical challenges.
Lead and manage software development projects, ensuring timely delivery and quality together with the Delivery Manager.
Work closely with product management, design, and operations teams to align development with business goals.
Communicate technical concepts and project updates to stakeholders.
Participate in on-call rotations to support availability and stability of business-critical services.
Maintain technical documentation for software development and system design.
Contribute to technical discussions and propose solutions for system improvements.
Requirements
Minimum 5 years of experience in a similar senior engineering role with a track record of leadership, strong technical skills, and successful project delivery.
Deep hands-on expertise in C# and .NET (Core / .NET 6+).
Strong understanding of async/await, multithreading, thread safety, memory management, and performance optimization.
Experience designing and evolving high-load backend systems with strict latency and reliability requirements.
Ability to identify and eliminate performance bottlenecks across CPU, memory, I/O, and database layers.
Experience designing and operating microservice-based systems.
Experience working with messaging systems and event-driven architectures.
Experience working with relational and non-relational databases.
Understanding of transactions, isolation levels, locking, concurrency, indexing strategies, and performance tuning.
Experience working with containerized environments including Docker and Kubernetes.
Understanding of CI/CD pipelines and automated delivery.
Understanding of scalability, load balancing, auto-scaling, and disaster recovery.
Understanding of production observability including logging, metrics, monitoring, and tracing.
Benefits
Benefits Cafeteria — annual budget you allocate to: Sports • Medical • Mental health • Home office • Languages.
Backend Engineer designing APIs and integration architecture for EvenUp's AI - powered legal - tech platform. Improving client portal experiences and application performance from Toronto or San Francisco hubs.
Staff Backend Engineer building search and recommendation systems for Affirm’s pay - over - time marketplace. Setting technical strategy and scaling distributed backend systems across Affirm’s shopping platform.
Senior backend engineer building reliable MySQL and distributed SQL infrastructure for Affirm’s transparent buy - now - pay - later financial products. Automating databases, migrations, networking, and operations at scale.
Senior backend engineer building and operating distributed database infrastructure for Affirm’s buy - now - pay - later platform. Automating provisioning, migrations, failover, and Kubernetes storage networking.
Backend Engineer building Resend’s SMTP and email transport infrastructure. Designing reliable delivery, throttling, routing, and reputation - aware systems for developers.
Salesforce director leading MuleSoft and enterprise data foundation architecture for customer engagements. Advising CxOs and delivering governed, AI - ready platforms across complex technology environments.
Senior Backend Engineer building scalable backend, ETL, and reporting systems for Commerce7, a winery commerce platform. Modernizing legacy databases and powering data - intensive SaaS APIs.
Principal Engineer shaping Xero’s accounting APIs and AI - ready platform. Leading technical strategy for partner integrations, developer tooling, and reliable financial workflows.
Senior Backend Engineer building scalable Java/Kotlin services for Toast’s restaurant reservations and payments platform. Delivering integrations, subscriptions, and guest - management capabilities across global markets.
Staff Backend Engineer improving CI pipelines, automation, and developer productivity at Affirm, a flexible - pay platform. Leading reliable build systems across engineering.