Senior Software Engineer, Backend

Field Sales RevolutionField sales powers the economy — but most teams are struggling. Reps are buried in admin work, managers are stretched thin, and leaders can't see what's really happening in the field.Siro is redefining how field sales teams learn, perform, and win.We started as an AI-powered coaching platform that helped reps improve their outcomes in the field.Today, we're something much bigger — an intelligent companion that automates sales reps' tedious admin work, gives managers real-time visibility, and helps executives see around corners.Our platform integrates with systems like Salesforce, analyzing thousands of in-person sales conversations to surface insights, automate workflows, and drive better outcomes across the org. Think Iron Man's Jarvis for sales — proactive, personalized, and built directly into the tools teams already use.Siro has raised $75M and is backed by world-class investors like Index, Fika, CRV, and SignalFire. We are trusted by leading home-improvement, retail, hospitality, and automotive brands, and powered by a lean team from Meta, McKinsey, Doordash, and Uber.We're building the future of human-AI collaboration in sales — and we're just getting started.Key ResponsibilitiesBuild platform and backend systems at Siro, across recording, integrations, AI agents, and more!Own the end-to-end development of key features, from architectural decisions through implementation, deployment, and supportDesign and build scalable backend services that handle real-time processing of sales conversationsDrive technical excellence through thoughtful code reviews, documentation, and engineering best practicesPartner closely with product and design teams to transform customer needs into elegant technical solutionsOwn the health of our systems and products, and make data-driven decisionsHelp evolve our development practices and tooling to enable sustainable scaling while maintaining velocityRequirementsWe expect 6+ years of professional software engineering experience.You are excited to work in our NYC office 3+ days a week with the rest of the team.You have strong proficiency in modern programming languages, databases, API frameworks, and cloud platforms (like GCP)You are a strong problem solver, with the ability to think critically and approach challenges with a first-principles mindset.You have strong communication skills, able to articulate complex technical concepts to both technical and non-technical stakeholders.Our Tech StackFrontend: Next.js, React Native, TypeScriptMobile: Swift, KotlinBackend: Node.js, Typescript, serverless functionsCloud: Google Cloud Platform (GCP)Other tools: Git, Datadog, FigmaWhy Join Siro?Growth: Join a rapidly scaling Series B startup with proven product-market fitTechnology: Work with cutting-edge AI technologies and a modern tech stackTeam: Collaborate with an experienced CEO (previously built a successful sales tool used by 100,000+ reps) and top-tier teamOwnership: Take end-to-end ownership of features that directly impact our usersLearning: Work across the full stack and grow your technical breadthImpact: Help democratize sales success and create opportunities for millions of sales professionalsWhat Sets You ApartYou're a collaborative team player with a "we before me" mindset, always ready to support and elevate your colleagues.You have high standards for excellence and aren't afraid to voice your opinion to push for quality.You think strategically beyond code, considering business and design implications in your work.You actively leverage AI coding tools to assist you during development.You thrive in an agile environment with low management overhead.You're creative and can think outside the box to solve complex problems in innovative ways.You continuously look to grow your skills and your impact.At Siro, we are committed to creating a diverse and inclusive environment where all people feel that they are equally respected and valued, whether they are applying for an open position or working at the company. We provide equal employment opportunities to all applicants without regard to race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.