Sr Full Stack Software Engineer

Role: ‘Sr Full Stack Software Engineer''

Location: REMOTE

(Contract to Hire)

About the Role

We''re hiring a Senior Full Stack Software Engineer to design, build, and scale modern web applications end-to-end. You''ll work across frontend UI, backend services, APIs, asynchronous processing, and data layers—shipping features that are reliable, secure, and built to last.

This is a senior individual contributor role with real autonomy and real impact. You''ll have end-to-end ownership of features and meaningful input into technical decisions, quality standards, and delivery practices working in a remote-first environment.

Core Tech Stack:

• Frontend: React 19, TypeScript, Vite-based React apps, Tailwind CSS, SignalR
• Backend: .NET 9 (C#), Minimal APIs, Entity Framework Core
• Async Processing: RabbitMQ, Redis (for scale-out and caching)
• Data and Storage: PostgreSQL, Amazon S3

What You''ll Do

• Shape the product architecture end-to-end. You''ll design and ship modular .NET services and modern React frontends that stay fast, reliable, and elegant across a wide range of real-world customer environments.
• Own the data foundation. You''ll design high-performance PostgreSQL schemas and craft EF Core queries that serve as the source of truth for business logic, permissions, and RBAC—balancing correctness, clarity, and scale.
• Engineer for performance at scale. You''ll build smart caching layers with Redis and leverage S3 for large artifacts, keeping our Web Gateway lean, responsive, and built to grow.
• Drive technical direction through RFCs. You''ll author and collaborate on design proposals that define data contracts and API boundaries, making our .NET platform and Python-based solver runners work together seamlessly.
• Ship with product and design, not in a silo. You''ll partner closely with product and design to turn real customer problems into thoughtful technical solutions—and deliver them in tight, iterative releases.
• Use AI as a force multiplier (responsibly). You''ll leverage tools like Claude Code and GitHub Copilot/Cursor to move faster and refactor with confidence, while keeping security, quality, and maintainability non-negotiable.
• Hold the quality bar high. You''ll help set the standard through great code reviews, automated testing, and pragmatic engineering practices that keep the codebase a joy to work in.

What We''re Looking For (Required)

• 8+ years of professional software engineering experience delivering production web applications.
• Strong full stack experience shipping user-facing features end-to-end across frontend, backend, and data layers.
• Deep expertise in React and TypeScript, including component architecture, hooks, and performance optimization.
• Experience building and maintaining modern React applications (Vite, Tailwind CSS and client-side data fetching patterns).
• Strong backend experience with C# and modern .NET (.NET 9 or similar), including API design with Minimal APIs and secure development practices.
• Strong experience with PostgreSQL, including schema design, indexing strategies, and query optimization.
• Hands-on experience with Entity Framework Core, including writing efficient queries and managing migrations.
• Experience designing and operating asynchronous workflows (RabbitMQ) and implementing caching strategies (Redis).
• Experience building real-time UI updates using SignalR.
• Experience working with AWS, especially object storage in Amazon S3.
• Solid understanding of authentication or authorization patterns including application-level RBAC (e.g., JWT, OAuth/OIDC concepts).
• Strong written and verbal communication skills, including the ability to collaborate effectively in a remote environment.

Nice to Have (Preferred)

• Experience integrating .NET services with Python-based systems and designing stable data contracts between services or teams.
• Experience with Docker and container orchestration (Kubernetes).
• Observability and performance tooling experience (OpenTelemetry, Application Insights, Datadog, Grafana/Prometheus).
• GraphQL experience (in addition to REST).