Senior Full-Stack Engineer
Underdog.io -Apply to top tech jobs in 60 seconds. A place where companies apply to you
Job Overview
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Job Description
About the Role: Senior Full-Stack Engineer
Join a pioneering company redefining enterprise outbound sales through cutting-edge AI and LLM-powered agent technology. Trusted by innovators like 1Password, Fivetran, and Greenhouse, this platform transforms how sales teams generate pipeline at scale. As a category creator in AI-driven sales acceleration, the company empowers revenue teams to achieve unprecedented efficiency.
The Mission
As a Senior Full-Stack Engineer, you will pioneer the future of sales technology. You’ll architect and scale AI-native products that automate complex sales workflows, collaborate directly with customers to shape the product roadmap, and lead technical innovation in a fast-paced, product-led environment. This is your chance to build the engine that drives revenue for tomorrow’s enterprises.
What You’ll Own
- Full-Stack Product Leadership: Build end-to-end features across the core platform using React, TypeScript, Node.js, and Python—from AI agent orchestration to scalable data pipelines.
- Technical Vision: Partner with engineering leadership to define architecture, quality standards, and development processes.
- Mentorship: Elevate junior engineers through code reviews, best practices, and hands-on technical guidance.
- AI Integration: Design systems leveraging LLMs to automate sales tasks, personalization, and analytics.
- Customer-Centric Innovation: Ship solutions that directly impact enterprise sales teams (ideation → production → iteration).
- Performance Optimization: Ensure reliability, scalability, and speed across 100M+ interactions.
Your Expertise
- 6+ years building production-grade full-stack applications (React, TypeScript, Node.js, Python).
- 1+ year in a technical leadership role (mentoring, architectural decisions, cross-functional influence).
- Proven success in startups or high-growth tech environments (comfort with ambiguity, rapid iteration).
- Mastery of distributed systems, API design, and database optimization.
- Strong communicator who thrives in collaborative, product-driven teams.
- Hybrid Flexibility: Ability to work from the SF office 3+ days/week.
Our Stack
- Frontend: React, TypeScript, Vercel
- Backend: Node.js, Python, GraphQL/REST
- Infra: AWS, Kubernetes, PostgreSQL
- AI Tooling: LLM orchestration, agent frameworks, real-time analytics
Compensation & Benefits
- Base Salary: Up to $300,000
- Equity: Meaningful ownership in a high-growth venture
- Health: 100% covered medical, dental, vision
- Flexibility: Unlimited PTO + hybrid work model
- Growth: Annual learning stipend, leadership training
- Workspace: Premium hardware + ergonomic setup support
Our Culture
- Builders at Heart: Obsessed with creating category-defining products.
- Velocity + Rigor: Move fast but never break trust.
- Customer-Led: Our users’ success is our north star.
- One Team: Win (or learn) together—egos checked at the door.
Key skills/competency
- Full-Stack Development
- React
- TypeScript
- Node.js
- Python
- AI/LLM Integration
- Technical Leadership
- Distributed Systems
- API Design
- PostgreSQL
How to Get Hired at Underdog.io -Apply to top tech jobs in 60 seconds. A place where companies apply to you
- Research this pioneering AI sales company's vision: Study their mission to redefine enterprise sales through AI and LLMs.
- Highlight full-stack and AI expertise: Tailor your resume to showcase 6+ years in React, Node.js, Python, emphasizing AI integration skills.
- Demonstrate startup adaptability: Prepare examples of thriving in high-growth, ambiguous environments with rapid iteration.
- Showcase customer-centric impact: Articulate how your past work led to tangible product solutions and improved user success.
- Prepare for technical deep-dives: Be ready to discuss distributed systems, API design, and LLM orchestration during interviews.
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