Senior Software Engineer, Backend Remote, Massachusetts

Your Role: We are looking for a Senior Backend Software Engineer who will help architect and build the core backend systems powering our real estate discovery platform and AI-driven user experience. You will work closely with product, design, and AI/ML teams to shape the platform’s foundation, scale our services, and ensure reliability and performance. This is a hands-on role ideal for someone who enjoys early-stage ownership, greenfield software architecture, and building flexible systems that support rapid iteration.

What You’ll Do: Design, build, and maintain backend services and APIs supporting Infinityy’s core platform and AI-driven features Architect scalable solutions in C#/.NET, integrating with both SQL and NoSQL data stores (Microsoft SQL Server, MongoDB, etc.) Develop cloud-native services and workflows on Azure or AWS, leveraging tools such as Functions, Data Factory, Service Bus, Event Grid, Lambda, or equivalent Collaborate with the AI team to integrate LLMs and agentic frameworks (LangChain, LangGraph, Haystack, CrewAI, AutoGen, AI Foundry) Own the design and execution of data pipelines, event-driven systems, and background processing workloads Build for reliability, observability, resilience, and strong security practices Contribute to DevOps workflows, CI/CD pipelines, release automation, and infrastructure management Mentor other engineers and shape engineering best practices and culture Participate in product discussions, roadmap planning, and feature scoping—your voice will matter

Required Qualifications: 5+ years of professional backend software development experience. Recent, real-world experience using AI coding agents and developer tools, such as Claude Code, GitHub Copilot, Cursor, or similar, as part of your day-to-day engineering workflow. Strong proficiency in C#/.NET and building production-grade APIs and services. Hands-on experience with relational and NoSQL databases (SQL Server, PostgreSQL, MongoDB, etc.). Experience building and deploying applications on Azure or AWS. Familiarity with cloud-native tools (Functions/Lambda, Service Bus/SQS, Event Grid/EventBridge, Data Factory/Glue). Solid understanding of distributed systems, system design, and event-driven architecture. Strong sense of ownership and comfort working in a fast-paced, seed-stage environment. Excellent communication skills and ability to collaborate across disciplines Experience with Typescript or Python (preferred) Experience integrating AI systems, LLMs, embeddings, RAG pipelines, or agentic frameworks (e.g., LangChain, LangGraph, Haystack, CrewAI, AutoGen, AI Foundry) (preferred) DevOps or platform engineering experience (CI/CD, containerization, monitoring, observability) (preferred) Prior experience in early-stage startups (preferred) Passion for proptech, real estate technology, or building consumer-facing digital experiences (preferred)

What We Offer: Competitive compensation A flexible remote/hybrid work environment Medical benefits Unlimited PTO Ability to shape a product and engineering culture from the ground up High autonomy, trust, and impact A mission-driven team focused on transforming real estate through technology We are committed to a diverse, equitable, and inclusive professional environment. We encourage individuals of all backgrounds to apply, and value each team members’ unique perspectives, recognizing they make our team stronger! Infinityy is proud to be an Equal Opportunity Employer and all qualified candidates will receive consideration for employment, regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status.