Software Engineer - Fullstack Job at Ergo (YC W25) in San Francisco

Join to apply for the Software Engineer - Fullstack role at Ergo (YC W25) Join to apply for the Software Engineer - Fullstack role at Ergo (YC W25) This range is provided by Ergo (YC W25). Your actual pay will be based on your skills and experience talk with your recruiter to learn more. Base pay range $100,000.00/yr - $160,000.00/yr Location: San Francisco Employment Type: Full-time Reports to: Founders About Ergo Ergo turns every customer conversationacross Zoom, email, Slack, and phoneinto structured CRM data, proactive follow-ups, and real-time revenue insights. We free sales teams from busywork so they can focus on relationships and closing deals. Why This Role Exists Weve proven productmarket fit with early reference customers and are now scaling our platform to handle massive data volumes and increasingly complex AI-driven workflows. As our next Software Engineer, youll be scaling the software and building the agents that make Ergo faster, smarter, and capable of serving thousands of users in real time. What Youll Tackle Scaling Core Services: Architect and scale data ingestion pipelines and APIs to handle millions of daily events across calls, emails, and messages. Advanced Agent Development: Build agents that handle complex sales tasks, such as follow-ups, CRM updates, and insight generation, even across highly customized setups and diverse sales stacks. Full-Stack Development: Ship user-facing features in our user dashboard and build integrations with existing sales and business tools. Collaboration & Product Impact: Work directly with founders and customers to scope features, gather feedback, and iterate quickly. You Might Be a Fit If You Bring 1+ years of experience building and scaling production-grade software You have built AI products for real customers in a team using Javascript, Python, the OpenAI/Claude/Gemini APIs Youre interested in solving complex AI search and retrieval problems, designing systems that surface the right information in real time Thrive in ambiguity, enjoy building from zero to one, and bias toward action Move in fast-paced, early-stage environments where speed and adaptability matter Can design systems that scale from first prototype to thousands of users Communicate clearly and collaborate well with technical and non-technical teammates Love learning fast, picking up new tools, frameworks, and approaches as needed You Might Not Be a Fit If You Are looking for a 9-5: the team typically works all day with breaks, dedicated time for meals, and excersize. It is also common to work into the night. Need extensive handholding: everyone on the team is doing critical work for the business. Of course guidance and feedback will be provided, though we value high agency for matters which may be able to be solved without pulling someone else in. Arent comfortable optimizing for speed: sometimes this means creative hacky/messy solutions. Dont like working with others: The team sits and works together all day. Its quite frequent to be asked for input, given feedback, and progress. Are uncomfortable with a young team Nice-to-Haves Experience with sales, RevOps, or CRM-related tooling. Exposure to real-time data processing or high-volume ingestion pipelines. Interest in AI agents, LLMs, and RAG Compensation & Benefits Competitive salary plus meaningful equity. Executive membership at the Bayclubs Seniority level Seniority level Entry level Employment type Employment type Full-time Job function Job function Engineering and Information Technology Industries Software Development Referrals increase your chances of interviewing at Ergo (YC W25) by 2x Sign in to set job alerts for Software Engineer roles. San Francisco, CA $160,000.00-$180,000.00 2 weeks ago San Francisco, CA $130,000.00-$238,000.00 2 weeks ago San Francisco, CA $150,000.00-$250,000.00 2 weeks ago Full-Stack Software Engineer (Jr/Mid level) San Francisco, CA $120,000.00-$180,000.00 1 month ago San Francisco, CA $150,000.00-$230,000.00 3 months ago Software Development Engineer I - Frontend & Mobile San Francisco, CA $150,000.00-$176,000.00 3 months ago San Francisco, CA $120,000.00-$190,000.00 9 months ago San Francisco, CA $57.00-$61.00 2 days ago San Francisco, CA $57.00-$61.00 2 days ago San Francisco, CA $125,000.00-$175,000.00 2 months ago San Francisco, CA $163,200.00-$223,200.00 2 weeks ago Software Engineer, Frontend (All Levels) San Francisco, CA $150,000.00-$180,000.00 5 days ago Software Engineer, AI Intern (Winter 2026) San Francisco, CA $57.00-$61.00 2 days ago Software Engineer, AI Intern (Summer 2026) San Francisco, CA $57.00-$61.00 2 days ago San Francisco, CA $165,000.00-$165,000.00 2 years ago San Francisco, CA $120,000.00-$200,000.00 2 years ago Alameda, CA $130,000.00-$160,000.00 2 months ago San Francisco, CA $140,000.00-$280,000.00 8 months ago Were unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr