Key2Source

Backend Engineer

Key2SourceContract
New York
8 - 12 YearsFeb 12th, 2026
84 ViewsBe an Early Applicant
Required Skillset:
Java

Job Description

Job Title : Backend Engineer – Onsite
Location: York New York 10285 (Day 1 Onsite)
Duration: 6+ months

Top Skills:
- Strong experience with REST API's both building and consuming
* Strong experience working with Service level architecture at the enterprise level- ideally a fintech or payments organization (Java, Gradle, Graph QL - Kotlin is a plus and/or an eagerness to learn)
* Strong experience collaborating with others teams, working across globally dispersed teams- much of the job is collaborating with other teams that own the APIs you need to build off of
* Passion for not just back end but how your work impacts the user experience of the application- has worked closely with product and UI teams
Role:
We are looking for a Server-side Engineer to work on Mobile application Service Layer (Backend for Frontend) for Global Dining. We want someone with strong technical skills and creativity. Should enjoy solving tough problems and working with modern technologies. You should not be shy about sharing your ideas and be obsessive about user experience and beautiful code. You will be working in a large team of engineers, product people, designers, and QA to build the “Backend for Frontend” API layer consumed by Award-winning American Express mobile apps.

Responsibilities:
• Contribute to the design, architecture, and development of Server Side REST APIs that are elegant, efficient, secure, highly available, and maintainable
• Works closely with other developers and end users to ensure technical compatibility and user satisfaction
• Contribute insights into ways to improve our processes and tools
• Be highly motivated and maintain a positive, “can-do” attitude in a fast-moving environment
• Follow and help cultivate consistent development best practices
• Collaborates with project manager and other software developers to plan, design, develop, test, and maintain the applications and APIs
• Provides thought-leadership regarding implementation best practices
• Assists in estimation and assessment of feasibility of features
• Foster a collaborative spirit across multiple teams

Relevant experience and skills:
• Building server-side applications
• Writing code
• Refactoring code
• Deleting code
• Build tools
• Continuous Integration
• Fixing bugs
• Asynchronous code
• Performance Analysis and Optimization
• Legacy Code
• Unit tests
• Open Source
• Working in a team
• Self-starting
• Integrating with bespoke lovingly hand-crafted backend services from the days of yore
• Designing solutions for open ended problems
• Bachelor’s degree in Computer Science or related field, or equivalent experience

Relevant technologies that you may encounter:
• Kotlin
• Gradle
• REST
• GraphQL
* Java

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