MERN Stack Developer

Senior MERN stack developer needed for our client’s growing team, based in Livingston, NJ

This position is onsite 3x a week and will include an IN PERSON INTERVIEW.
Must be local
C2C or W2 hourly. Long term contract.

Our Fintech client is seeking a strong, backend-focused MERN Engineer with deep experience in Node.js. This role is heavily emphasizing APIs, serverless architecture, and cloud-native services.

Key Responsibilities:

• Design, build, and maintain scalable RESTful APIs supporting high-volume client integrations.
• Develop backend services using Node.js and Python, with a strong focus on performance, security, and reliability.
• Build and support AWS serverless solutions, including:
• Lambda functions
• Step Functions for workflow orchestration and service coordination
• Contribute to a platform that enables self-service API access for hundreds of external consumers.
• Work independently to deliver features end-to-end in a fast-paced, results-driven environment.
• Collaborate across teams and participate in cross-training initiatives to broaden technical expertise.
• Support and contribute to Generative AI initiatives, tools, or integrations as part of ongoing platform evolution.

Qualifications:

• 7+ years of backend development experience, Node.js development, including strong experience in MongoDB.
• Expertise in API development
• Knowledge of Python, and strong object-oriented design
• SQL and NoSQL data stores

• Hands-on experience with the MERN stack, with a clear preference for backend-heavy development.
• Solid hands-on experience with AWS Lambda and serverless architectures.
• Ability to work independently, manage ambiguity, and deliver consistently in a high-velocity environment.
• Strong communication skills and a collaborative, growth-oriented mindset.
• Bachelor’s degree in Computer Science, Engineering or related discipline