Senior Python Engineer / Node.js / FinTech Start-Up

Kelly Services

📍 Phoenix, AZ, United States

Full-time other-general Posted June 13, 2026

Job Description

$130000 - $150000
A rapidly growing Series A FinTech start-up in Phoenix, AZ is hiring a Senior Software Engineer for a full-time position.

In this role, you will lead the migration of their automated trading application from Node.js to Python, creating a more scalable and robust solution. The ideal candidate has 5+ years of experience building greenfield applications at start-ups with strong skills in Python, Node.js, and SQL.

The company offers a flexible schedule to work four 10-hour days each week with Fridays off and work two days onsite per week.

**Required Skills & Experience:**

+ Bachelor’s in computer science or a related field
+ 5+ years of professional software engineering experience
+ Python
+ Node.js
+ SQL
+ REST APIs

**Plusses:**

+ Hands-on experience with AWS or Azure
+ Experience building greenfield applications at start-ups

**Benefits:**

+ Competitive base salary
+ Medical, ...