Founding Engineer (Full Stack)

Incommon India; Bengaluru; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

InCommon is a seed-stage consumer fintech building an AI-first personal finance app for India. You’ll own the system end to end, from data ingestion to the user interface, as part of the founding team in Bangalore on-site.

The role combines backend Python/FastAPI and frontend React/React Native work across web and iOS from a single codebase. You’ll implement the user context layer, integrate with account aggregators, MF Central, and other APIs, and add telemetry so the team sees real usage

Qualifications

• 5+ years full-stack development in a small team.
• Strong Python and React expertise with end-to-end ownership.
• Experience building user-context or data integration layers is a plus.
• Ability to own deployment, uptime and security posture.
• Bonus: telemetry/observability from scratch; React Native is a plus.

Responsibilities

• Build the user context layer integrating account aggregators and APIs.
• Own backend in Python/FastAPI and frontend in React/React Native.
• Instrument telemetry and analytics for product usage.
• Own deployment, uptime and security posture.
• Ship to web and iOS from one codebase.

Skills

Python

FastAPI

React

React Native

Infra ownership

Security hygiene

Job description

The Role: Full Stack Engineer (Founding Team)

Location: Bangalore (on-site)

About the Company

InCommon is hiring on behalf of a seed-stage consumer fintech building an AI-first personal finance app for India - a premium, conversational alternative to the dashboard products that dominate the category. The thesis is that most people don't deploy their money well, not because the information is missing, but because it's buried in charts that assume you already know what to look for. The product reads a user's full financial context and tells them what matters, proactively.

You’ll own the system end to end - from the data coming in to the interface the user touches. The most important piece is the user context layer: the engine that assembles a complete picture of a user’s finances from what they tell us directly and from what we pull via account aggregators, MF Central, and other APIs. Everything the product knows flows through what you build.

This is a founding-team seat. You’re not joining a platform team inside a larger org - you’re building the platform.

What you’ll do

• Build the user context layer: user-provided data plus integrations with account aggregators, MF Central, and mutual fund platforms
• Own the backend in Python and FastAPI
• Build and extend the frontend in React / React Native, shipping to web and iOS from one codebase
• Instrument the product with telemetry - funnels, behavioral data, the works so the team can see what's actually happening, not guess
• Own deployment, uptime, and security posture

What we’re looking for

• 3 - 6 years spanning backend and frontend, with real depth on at least one side
• Strong in Python/FastAPI and React
• Zero-to-one experience - you’ve built something before the patterns existed, in a small team where you owned outcomes rather than a slice of a system
• Comfort owning infra directly: EC2, keeping services up, basic security hygiene, no dedicated DevOps team to lean on
• Bonus: you’ve set up telemetry/observability from scratch and can talk about what you tracked and why
• Bonus: React Native - if you’re strong in React we’re confident you’ll pick it up
• No fintech or finance-domain background required

Process note: the interview includes a machine coding round you’ll build something real, live. If you do your best work heads-down rather than on the clock, worth knowing going in