Mid-Level Crypto Developer Porto

Mid-Level Crypto Developer
Porto
Porto, Porto District, Portugal

? Position:

Mid-Level Crypto Developer

? Location:

Hybrid at Porto city center

? Start Date:

Immediate

We’re looking for a Crypto Developer with solid experience in blockchain technologies and strong technical skills in Java
Script/Type
Script to join our team. If you’re passionate about decentralized tech, security, and innovative financial experiences, we’d love to hear from you!

? What We're Looking For:

Crypto Knowledge & Experience:

• Creating and managing custodial wallets
• Integrating On-Ramp and Off-Ramp solutions (e. G. , Transak, Moon
  Pay)
• Working with the Lightning Network (channels, invoices, nodes)
• Good understanding of crypto security, privacy, and KYC/AML practices

Tech Skills:

• Java
  Script & Type
  Script
• Node. Js (Express, external service integrations, backend logic)
• Relational Databases (Postgre
  SQL or My
  SQL) with solid SQL skills
• No
  SQL Databases (Mongo
  DB or Dynamo
  DB)
• Designing and consuming RESTful APIs
• Version control with Git (branching, pull requests, code reviews)

? What You’ll Be Doing:

• Develop and maintain crypto infrastructure (wallets, payments, partner integrations)
• Collaborate with the product and frontend teams to create seamless, secure crypto experiences
• Build and document APIs for crypto operations
• Contribute to technical and architectural decisions

✅ Requirements:

• 2–4 years of experience in web development
• Hands-on experience with crypto products (previous jobs,
  - source projects, or personal work)
• Strong communication skills and ability to work in a team

? Nice to Have:

• Experience with AWS (especially Lambda, Dynamo
  DB, S3)
• Knowledge of backend security best practices (authentication, rate limiting, data encryption)