Software Engineer (Full Stack)

AptenOmnichannel AI agents that engage leads across SMS, voice, and emailSoftware Engineer (Full Stack)$140K - $180K•0.20% - 1.00%•San Francisco, CA, USJob typeFull-timeRoleEngineering, Full stackExperienceAny (new grads ok)VisaUS citizen/visa onlySkillsAmazon Web Services (AWS), Node.js, Python, React, Prompt EngineeringConnect directly with founders of the best YC-funded startups.Apply to role ›Roshan KumaraswamyCTORoshan KumaraswamyCTOAbout the roleAbout the Role Apten is an omni-channel AI agent that automates sales and marketing conversations with millions of leads across SMS, voice, and email.

Apten communicates exactly like a human — dynamically switching between channels, personalizing every follow-up, and proactively using tools (CRMs, schedulers, lead systems) in-conversation. We are profitable, well-funded, and growing fast. We’re now scaling rapidly and looking for our second full stack software engineer to join us. You’ll work directly with the founding team to build core product experiences and infrastructure — from high-throughput message pipelines to voice bots, workflow builders, context management systems, AI-driven orchestration, and self-improvement systems.

This is an opportunity to own critical systems and shape the product and culture from the ground up. What You’ll Do Own and ship core features across the stack — from React frontends to AWS-based APIs, Lambdas, and microservices Work directly with enterprises to build AI agents, and the data flywheels needed to give them proper context Build scalable infra for messaging, AI inference, and automation at high volume Experimental work - turn Apten into a self-improving, high-performance sales/marketing agent. 100% ownership, 0 bureaucracy What We’re Looking For Curiosity and drive to figure things out — whether debugging a scaling issue or building something completely new Experience building and shipping production software (or equivalent skill) - personal projects are OK Experience with TypeScript, React, and AWS (Lambda, ECS, DynamoDB, SQS, CDK, etc.)

Strong product sense — able to make pragmatic tradeoffs, prioritize for impact, and ship fast Comfortable working across the stack (frontend → backend → infra) Previous startup or early-stage experience a plus Bonus Points Experience working with LLMs Experience with event-driven architectures and async workflows Strong interest in AI-powered automation and conversational systems About AptenAptenFounded:2023Batch:S24Team Size:6Status:ActiveLocation:San Francisco FoundersDaniel Ho CEODaniel Ho CEORoshan Kumaraswamy CTORoshan Kumaraswamy CTO