About the role

At S45 we are building an AI native investment bank where product, engineering and banking operate as one system. Full stack engineering sits at the center of this.

As a Full Stack Engineer you will build the interfaces, APIs and internal tools that surface intelligence from our AI workers and make them usable for issuers, advisors and investors. You will work across React, APIs, data models and cloud infrastructure to ship reliable systems that support real deal execution.

This role is for someone who enjoys moving across the stack, cares about performance and clarity, and likes owning features end to end.

What you will do

• Build responsive React or Next.js interfaces in TypeScript

• Create clear and reliable APIs using FastAPI or Node

• Design database schemas and work with Postgres for clean data access

• Deploy and maintain workloads on Azure, AWS or GCP

• Set up CI/CD pipelines that enable fast, safe iteration

• Work closely with product and AI engineers to integrate agent outputs into user facing surfaces

What we are looking for

• At least 3 years of experience building production grade full stack systems

• Strong proficiency in React or Next.js, TypeScript and front end engineering fundamentals

• Confidence writing backend services in FastAPI or Node with clean abstractions and clear data flow

• Experience with Postgres and understanding of relational data modeling

• Comfort deploying and scaling systems on major cloud providers

• A performance mindset and attention to detail

• Clear communication and an ability to work in ambiguous, fast moving environments

How we work

• Small teams, high ownership

• Clear problem statements and fast decisions

• Builders who take pride in clean, thoughtful work

• High trust, low noise, direct feedback

What we offer

• Complex, meaningful problems at the intersection of AI, finance and product

• Competitive compensation and real responsibility

• Direct work with founders and senior engineers

• High agency environment with clarity of expectations

• A culture that rewards precision, curiosity and follow through

How to apply

Email: aman@s45club.in
Subject: Hiring @ S45 | Full Stack Engineer

Attach:

• LinkedIn or GitHub

• Three bullets on the work you are proudest of