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Sr. API Engineer

GreyStar Systems LLCCharlotte, NC🇺🇸United StatesPosted Oct 23, 2026

Why this role stands out

This Sr. API Engineer role at GreyStar Systems LLC offers an exciting opportunity to contribute to impactful projects within a reputable company, with the added flexibility of a hybrid work model. If you're a skilled engineer eager to expand your technical expertise and collaborate within a dynamic team, this position is a fantastic next step for your career. Don't miss out on the chance to apply and grow with us!

Quick overview

SeniorityMid Senior
Work modeOn Site
LocationCharlotte, NC, United States
Posted2 days ago
AWSGraphQLTerraformRESTNode.jsReactAgile

Job description

Hello,

Hope you are doing great

Please let me know if you are available for a new role


Title:  Sr. API Engineer

Contract: Ongoing contract

Location: Charlotte, NC

Description:-

The Sr. API Engineer will play a critical role in designing and building RESTful and GraphQL APIs using Node.js. The ideal candidate will have strong backend development expertise, experience with Terraform and AWS, and a Bachelor's degree. This is a primarily backend-focused role, though some UI experience (e.g., React) or willingness to learn would be a plus. The project involves building custom fine-grain authorization systems and will run through early next year. The successful candidate will work in a close-knit, agile team environment, taking full accountability and ownership of their contributions.

About the Position / Current Initiatives: The team is working on Graph APIs and fine-grain authorization, building their own version for a specific use case. This project will continue until early next year.

About the Team Structure + Culture: The team consists of 4 junior-to-mid-level developers. No seniors report directly to the manager, but Raghu does have some senior team members. The team operates in a close-knit, agile environment with a lot of ownership of their technology and openness to solutions.

Job Must Haves:

  • GraphQL experience on the backend
  • Terraform experience with AWS
  • Experience building RESTful and GraphQL APIs with Node.js
  • Bachelor's degree
  • Mid-level (5 years)
  • 100% individual contributor who takes accountability and responsibility for assigned work

Job Nice to Haves:

  • Some UI experience (e.g., React) or willingness to learn
  • Prior Ally experience
  • Not specifically financial services experience

Manager Likes/Dislikes:

  • Likes: Candidates with prior Ally experience (though not required)
  • Dislikes: Job-hopping (6 months to 1 year)

What the right candidate will enjoy:

  • Working on innovative Graph APIs and fine-grain authorization projects
  • A close-knit, agile team environment with a strong sense of ownership
  • Opportunities to contribute to cutting-edge solutions

Interview Process:

  • 1st round phone interview, coding assignment, final in-person interview with whiteboarding

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