Senior Software Engineer, Full Stack

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.

Key Responsibilities

• Build and enhance features (especially frontend) for Siro's direct consumers, creating intuitive user experiences for our AI-powered sales platform
• Own the end-to-end development of key features, from architectural decisions through implementation, deployment, and support
• Craft intuitive, performant user interfaces that make complex AI insights accessible to our users
• Drive technical excellence through thoughtful code reviews, documentation, and engineering best practices
• Partner closely with product and design teams to transform customer needs into elegant technical solutions
• Help evolve our development practices and tooling to enable sustainable scaling while maintaining velocity
• Own the health of our systems and products, and make data-driven decisions

Requirements

• We 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 demonstrate strong proficiency in TypeScript frameworks
• You have experience with Node.js and REST API design
• You have demonstrated skill in mobile and/or web performance optimization
• 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 Stack

In case you’re curious, we use the following technologies (and more), but proficiency in any specific technology is not required.

• Frontend: Next.js, React Native, TypeScript
• Mobile: Swift, Kotlin
• Backend: Node.js, Typescript, serverless functions
• Cloud: Google Cloud Platform (GCP)
• Other tools: Git, Datadog, Figma

Why Join Siro?

• Growth: Join a rapidly scaling Series B startup with proven product-market fit
• Technology: Work with cutting-edge AI technologies and a modern tech stack
• Team: Collaborate with an experienced CEO (previously built a successful sales tool used by 100,000+ reps) and top-tier team
• Ownership: Take end-to-end ownership of features that directly impact our users
• Learning: Work across the full stack and grow your technical breadth
• Impact: Help democratize sales success and create opportunities for millions of sales professionals

What Sets You Apart

• You'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.