Senior Software Developer

Senior Software Developer

Overview:

Constellation1 is a leading provider of integrated technology, media, and data solutions to real estate franchisors, brokerages, agents, and MLS organizations and associations. Our mission is clear: innovate in real estate. We don’t just build technology, we partner with clients to identify problems, design solutions, and unlock opportunities that transform the industry.

The Position:

We are seeking a Senior Software Developer to help build and evolve our products, used by real estate organizations across North America. You’ll design and deliver cloud-native services, leverage data and AI to create intelligent experiences, and help raise the bar for reliability, scalability, and developer experience.

Our ideal candidate is a pragmatic engineer who values clarity over complexity, automates relentlessly, measures impact, and thrives in cross-disciplinary collaboration. You’re comfortable mentoring teammates and bring a solutions-first mindset to every challenge.

Job Responsibilities:

• Design & deliver cloud-native applications using modern patterns (serverless, event-driven, containerized) with a focus on scalability, resilience, and cost efficiency.
• Own the full stack: React + TypeScript on the front end; .NET (C#) and/or Node.js/TypeScript on the back end; SQL as a primary store, augmented by NoSQL where it fits.
• Build robust APIs (REST/JSON; GraphQL a plus), integrating with internal, third-party, and AI-powered services securely and efficiently.
• Craft intuitive, performant, and accessible UIs using modern web frameworks, ensuring responsive design across devices and optimizing for SEO and usability.
• Apply Infrastructure as Code (IaC) to define, provision, and evolve cloud infrastructure.
• CI/CD & release engineering: automate build/test/deploy with modern pipelines;
• Security by default: embed security best practices across the SDLC.
• AI & Data Integration: work with data pipelines, AI/ML APIs, and analytics tooling to enrich applications with intelligent search, personalization, and automation.
• Mentor & lead: guide code reviews, pair program, evolve standards, and coach developers on cloud patterns, AI integration, and clean architecture.
• Collaborate with Product and Design to turn ambiguous requirements into clear, testable, high-impact deliverables.
• Writing clean, well-documented code that adheres to team standards and best practices
• Take ownership of coding assignments with minimal supervision required

Required Qualifications and Skills:

• 6+ years building and operating production web applications at scale.
• 3+ years hands-on with cloud-native development in production.
• Strong proficiency in C#/.NET and/or TypeScript/Node.js for backend services.
• Strong experience with SQL (schema design, performance tuning, query optimization) and familiarity with NoSQL patterns where appropriate.
• Front-end experience with modern web UI frameworks (React preferred), delivering responsive, accessible UIs.
• Experience with IaC and automated CI/CD pipelines.
• Solid grasp of distributed systems concepts: idempotency, retries/backoff, eventual consistency, partitioning, caching.
• Excellent communication; able to simplify complex trade-offs and lead design reviews.
• Strong ability to solve complex problems independently
• Experience working in an Agile/Scrum environment

Nice To Have

• .NET 8 + ASP.NET Core, minimal APIs, and background services.
• Next.js or similar (SSR/ISR) and web performance/SEO fundamentals.
• Experience integrating search and recommendation systems (OpenSearch, Elasticsearch, or AI-based search).
• Experience with data streaming, CDC patterns, and real-time event processing.
• Experience with AI/ML APIs (e.g., NLP, recommendation engines, generative AI for content automation).
• Multi-tenant SaaS experience with SSO, feature flagging, and tenant isolation.