Full-stack • Python/FastAPI • React • Postgres • AWS • Early-stage Ownership
RetainSure is an AI Customer Success Manager that eliminates the need for CSMs for low-touch accounts and reduces headcount by 80% for high-touch teams. We integrate deeply across product, CRM, support, billing, and external signals to build a unified intelligence layer, and deploy specialized AI agents that behave like a human CSM across backstage, in-meeting, and in-product workflows.
We’re now hiring a Founding Engineer to join our core team and help build the next $100M+ AI infra layer for Customer Success.
Architect and build core product components across backend, frontend, infrastructure, and data pipelines.
Develop scalable services using Python, FastAPI, Postgres, and AWS-native components.
Build high-quality user-facing experiences in React.
Design, optimize, and maintain database schemas and high-throughput workflows.
Work directly with the founders to define product, ship fast, and iterate with customers.
Own modules end-to-end, from concept → architecture → implementation → monitoring.
Set engineering standards, improve dev velocity, and lay the foundation for the engineering culture.
2+ years of experience as a Full-Stack Engineer in high-velocity environments.
Strong backend fundamentals: Python, FastAPI, SQL/Postgres, distributed systems basics.
Solid frontend engineering with React.
Strong grasp of DSA, algorithms, and database internals.
Deep comfort with AWS (EC2, S3, Lambda, RDS, VPC, IAM, etc.).
Bias toward action, ownership, and solving real customer problems.
Ability to move fast without compromising code quality.
Ambition to start your own company in the future: we love founders-in-the-making.
Experience building large-scale SaaS systems, data platforms, or AI-driven workflows.
Worked in early-stage startups or shipped 0→1 products before.
Founding-level ESOPs with outsized ownership.
Work with founders experienced in building/scaling SaaS (Rubrik, Mailmodo, ClearTax).
High trust, zero bureaucracy, rapid execution environment.
Opportunity to architect systems that will scale globally across enterprise customers.
First-hand exposure to building and scaling a company from scratch.
15-18 LPA + founding engineer level ESOPs
Bengaluru