Full Stack Engineer (Crypto payments network)

Braintrust; San Francisco (CA); Hybrid; USD 100,000 - 405,000; Full time

Job summary

Braintrust is seeking a Full Stack Engineer to join their dynamic team in San Francisco or New York City. In this hybrid role, you will build the foundation of a global crypto payments network, collaborating with cross-functional teams to create secure and scalable financial solutions. This unique opportunity offers direct influence over product direction and architectural decisions within a fast-paced tech environment.

Benefits

Flexible working hours

Career development opportunities

Health benefits

Qualifications

• 5+ years of experience as a full stack or frontend/backend-focused engineer.
• Hands-on experience with crypto technologies is crucial.
• Strong backend experience preferred.

Responsibilities

• Design and maintain scalable backend services and APIs for core crypto functionality.
• Collaborate with teams to launch new features and products.
• Implement security-first solutions.

Skills

TypeScript

React

Java

Go

C#

Scala

HTML

CSS

API design

security protocols

Education

Bachelor's Degree in Computer Science or related field

Job description

Full Stack Engineer (Crypto payments network)

Join to apply for the Full Stack Engineer (Crypto payments network) role at Braintrust

Full Stack Engineer (Crypto payments network)

Join to apply for the Full Stack Engineer (Crypto payments network) role at Braintrust

• Hybrid role in San Francisco or New York City
• Full-time opportunity, direct hire
  
  

Job Description

• Hybrid role in San Francisco or New York City
• Full-time opportunity, direct hire
  
  

Mesh is seeking a Full Stack Engineer to help build the foundation of the world’s first global crypto payments network. In this role, you’ll work across backend systems and user-facing applications to deliver secure, seamless, and scalable financial experiences. You’ll collaborate with product, design, and engineering teams across multiple regions to bring new features to life. We have a strong preference for candidates based in New York City to enable close collaboration with our core team. This is a unique opportunity to join a fast-paced, high-growth company where you’ll influence product direction, contribute to key architectural decisions, and help shape the future of digital finance.

Responsibilities

• Design, develop, and maintain scalable backend services and APIs for core crypto functionality (wallets, payments, smart contracts, exchange integrations).
• Build and optimize responsive, user-friendly web applications using modern JavaScript/TypeScript frameworks.
• Collaborate with cross-functional teams (Engineering, Product, Design) across North America, Europe, and India to launch new features and products.
• Implement security-first solutions with best practices in authentication, authorization, and encryption.
• Write clean, well-documented, and efficient code across the stack. Participate in architectural decisions, system design reviews, and code reviews.
• Troubleshoot issues, conduct performance tuning, and ensure cross-browser/mobile compatibility.
• Contribute to DevOps workflows, CI/CD, and deployment processes across multi-cloud platforms (Azure, AWS, GCP).
• Stay up-to-date with the latest in fintech, crypto, and fullstack development trends
  
  

Requirements

• 5+ years of experience as a full stack or frontend/backend-focused engineer.
• Proficiency in modern frontend technologies: TypeScript, React, Redux, HTML, CSS.
• Strong backend experience with languages like Go, Java, C#, or Scala.
• Deep understanding of API design, microservices, and scalable system architecture.
• Hands-on experience with crypto technologies: self-custody wallet APIs, WalletConnect, Wagmi, Ethers.js, Viem.
• Familiarity with blockchain fundamentals, RPCs, and smart contract interaction.
• Security-first mindset with knowledge of AuthN/AuthZ, API security, encryption, and SAML.
• Experience working with DevOps and CI/CD pipelines; familiarity with Azure is a plus.
• Passion for building high-quality fintech or crypto products.
• Strong communication and collaboration skills in a distributed, global team environment.
  
  

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Technology, Information and Internet

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