Senior Full Stack Software Engineer

UpCore Solutions; New York (NY); On-site; USD 140,000 - 190,000; Full time

Job summary

UpCore Solutions is seeking a Senior Full Stack Software Engineer to join a small, high-impact team building AI-powered financial infrastructure for senior care. You will own product initiatives end-to-end, break down ambiguity into deliverable chunks, and drive features into production.

You will collaborate with the CTO and cross-functional partners to shape the product and engineering culture, focusing on data integrity, speed, and the fintech/health tech domain.

Qualifications

• 4–12 years of software development experience.
• Experience building AI-powered fintech platforms.
• Ownership of initiatives end-to-end.
• Ability to collaborate with cross-functional teams.

Responsibilities

• Own product initiatives end-to-end, scoping ambiguous problems and shipping to production.
• Make architectural and engineering design decisions that shape the platform.
• Build full-stack features across React and Node.js for payments, claims, and revenue automation.
• Collaborate with product and non-technical stakeholders to translate complex business processes into software.
• Leverage AI tooling to build an AI-native product experience.

Skills

Full-stack development

React

Node.js

JavaScript

TypeScript

PostgreSQL

AI/ML

Financial tech

Tools

AI tooling

Job description

Our client is looking for a Senior Full Stack Software Engineer with 4–12 years of experience to join a small, high-impact engineering team building AI-powered financial infrastructure for senior care. You'll take ownership of product initiatives end-to-end, breaking down ambiguity into shippable work and driving features into production independently. This AI-native fintech company processes $1B+ in payments annually, and this is a ground-floor opportunity to work directly with the CTO and shape both the product and engineering culture. Ideal candidates come from fintech or health tech backgrounds and thrive in fast-moving, early-stage environments where data integrity and speed both matter.

What will you be doing?

• Own product initiatives end-to-end, scoping ambiguous problems, breaking them into deliverable chunks, and shipping to production
• Make architectural and engineering design decisions that shape the platform's direction
• Build full-stack features across React and Node.js powering payments, claims, and revenue automation for senior living operators
• Collaborate cross-functionally with product and non-technical stakeholders to translate complex business processes into software
• Leverage AI tooling and automation to build an AI-native product experience

Tech Stack:

React, Node.js, JavaScript, TypeScript, PostgreSQL, Full-Stack Web Development, AI/ML