Blockchain Developer

American Express; Minneapolis (MN); Remote; USD 88,000 - 122,000; Part time

Job summary

American Express is seeking a hands-on Blockchain Developer to architect, code, and deploy with a focus on quality. This part-time role in Minneapolis, MN offers a $88,000–$122,000 annual salary, with remote options and mentoring to help you grow.

You will work on Rails-based systems, scale CI/CD pipelines, and own RESTful APIs powering core products. The ideal candidate has 5+ years of Ruby on Rails experience, strong coaching and collaboration skills, and a track record of delivering reliable,

Qualifications

• 5+ years of Ruby on Rails experience.
• Part-time role.
• Experience with CI/CD pipelines.
• Ability to optimize performance and latency at scale.
• Develop and maintain RESTful APIs powering core applications.

Responsibilities

• Question the autonomy-driven Elasticsearch pattern and propose a cleaner approach.
• Scale CI/CD services from Minneapolis pilot to MN-wide rollout.
• Optimize application performance, latency, and resource utilization at scale.
• Develop and maintain RESTful APIs powering core American Express products.
• Investigate, diagnose, and fix bugs reported by users and monitoring tools.
• Chase down Rails integration issues causing events to drop at midnight.
• Pull Elasticsearch telemetry into dashboards used by leadership.

Skills

CI/CD chops

Mid-level

Coaching experience

Communication

Tools

Ruby on Rails

Elasticsearch

RESTful APIs

CI/CD

Job description

American Express needs a hands-on Blockchain Developer who can architect, code, and deploy without losing sight of quality. Boiled down: part-time, $88,000 - $122,000, 5 years of Ruby on Rails, and a seat at the table where American Express decisions get made.

Key Responsibilities

• Question the autonomy-driven Elasticsearch pattern everyone copied and propose something cleaner
• Scale American Express's CI/CD services from Minneapolis pilot to MN-wide rollout
• Optimize application performance, latency, and resource utilization at scale
• Develop and maintain RESTful APIs powering core American Express products
• Investigate, diagnose, and fix bugs reported by users and monitoring tools
• Chase down the Ruby on Rails integration that silently drops American Express events at midnight
• Pull Elasticsearch telemetry into dashboards American Express leaders actually open

What You'll Bring

• Working knowledge of Coaching alongside transferable CI/CD chops
• Comfort being measured against a clear mid-level bar
• Hands-on Coaching experience that survives a whiteboard interview
• Strong rapport-building skills and a genuinely positive presence

American Express treats Minneapolis, MN as both home and laboratory, prototyping relentlessly curious technology ideas no larger rival would risk. Mistakes get dissected for lessons at American Express, never weaponized in your next review.

Take $88,000 - $122,000, add a mentor invested in your rise, layer on benefits and remote options, and that is the American Express offer in one breath.

We're looking for the person who reads technology job posts and thinks I could fix that.