Senior / Staff Full Stack Engineer

Trust In SODA; New York (NY); Hybrid; USD 160,000 - 260,000; Full time

Benefits offered by this job

Equity

Job summary

Trust In SODA in New York City is seeking a senior or staff software engineer to own end-to-end verticals including data model, API, interface and production. You’ll collaborate with finance specialists and work on a stack of TypeScript and React, with Python and FastAPI on the backend, in a small, senior engineering team with equity upside.

The role targets fintech domain experience, a strong full-stack background, startup history, and daily use of AI coding tools to ship production code.

Qualifications

• 6+ years for Senior role
• 12+ years for Staff role
• Fintech background preferred (payments, billing, ledgers, lending)
• Startup experience with stable career history
• Daily hands-on use of AI coding tools (Claude, Cursor, or similar) to ship production code

Responsibilities

• Own whole verticals end to end: data model, API, interface and production.
• Work alongside the finance specialists who use the product every day.
• Build and maintain systems using a stack of TypeScript and React, with Python and FastAPI on the backend.
• Contribute as part of a small, deliberately senior engineering team that hires top down.

Skills

Full-stack generalist

Frontend

Backend

Data

Infrastructure

AI coding tools

Tools

TypeScript

React

Python

FastAPI

Job description

$160,000–$260,000 base + equity | New York City | Hybrid

About the Company

SODA is partnered with an early-stage, venture-backed fintech rebuilding the financial operations behind the world's leading investment firms. Their platform reads messy source documents, models complex financial structures and moves money between banks and investors, with AI doing the heavy lifting and deterministic checks making sure every number is right.Already live with paying clients, this is a small, deliberately senior engineering team that hires top down.

About the Role

You'll own whole verticals end to end: data model, API, interface and production, working alongside the finance specialists who use the product every day. Stack is TypeScript and React, with Python and FastAPI on the backend.This is a senior or staff-level opportunity with early equity upside at a company already serving clients and building a deep engineering bench. Sound like the kind of ownership you're after?

Responsibilities

• Own whole verticals end to end: data model, API, interface and production.
• Work alongside the finance specialists who use the product every day.
• Build and maintain systems using a stack of TypeScript and React, with Python and FastAPI on the backend.
• Contribute as part of a small, deliberately senior engineering team that hires top down.

Requirements

• A true full-stack generalist skillset across frontend, backend, data and infrastructure (6+ years for Senior, 12+ for Staff).
• A fintech background, ideally building systems that handle money: payments, billing, ledgers or lending.
• Prior startup experience and a stable career history, with tenures long enough to have lived with your decisions.
• Daily hands-on use of AI coding tools (Claude, Cursor, or similar) to ship production code.