Senior Node.js Engineer — Warren, MI (Freelance)

American Express Company; Warren (MI); On-site; USD 82,000 - 129,000; Full time

Job summary

American Express in Warren, MI is hiring a senior Node.js Developer on a freelance basis. The role offers $82,000 - $129,000 per year with real room to advance, and the option to influence tool choices for the project.

Key responsibilities include sprint planning participation, feature flag integration for Persuasion, and owning a Flask subsystem used across Amer ican Express services. A strong portfolio and senior cross-functional experience are expected.

Qualifications

• Experience supporting cross-functional teams in a senior capacity.
• Fluency with gRPC and Flask, with strong opinions on both.
• Scrappy-but-steady problem-solving that doesn’t wait for permission.
• An American Express mindset: scrappy today, scalable tomorrow.
• A portfolio or work samples that demonstrate your technology expertise.

Responsibilities

• Contribute to sprint planning, estimation, and technology roadmap discussions.
• Wire up Persuasion feature flags for Warren traffic risk-free testing.
• Translate the quality-obsessed Swift outage into fixes for the next Warren launch.
• Own the Flask subsystem that the rest of American Express depends on.
• Map data flow across Swift services and spot leaks.
• Tune database queries and schemas for high-throughput workloads.
• Translate napkin ideas into Flask prototypes.

Skills

Cross-functional leadership

Senior-level experience

Problem-solving

Strategic thinking

Portfolio work

Tools

gRPC

Flask

Job description

American Express in Warren, MI is hiring a senior Node.js Developer on a freelance basis. The role offers $82,000 - $129,000 per year with real room to advance, and the option to influence tool choices for the project.

Key responsibilities include sprint planning participation, feature flag integration for Persuasion, and owning a Flask subsystem used across Amer ican Express services. A strong portfolio and senior cross-functional experience are expected.