Senior Blockchain Jobs

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Job Position Company Posted Location Salary Tags

sigmasoftware2

Poland

$72k - $72k

Tether

Sao Paulo, Brazil

$140k - $147k

Tether

Madrid, Spain

$140k - $147k

Tether

Warsaw, Poland

$140k - $147k

Tether

Lisboa, Portugal

$140k - $147k

Tether

Buenos Aires, Argentina

$140k - $147k

D3

Los Angeles, CA, United States

$105k - $180k

Circle

Hong Kong, Hong Kong

$101k - $165k

Trilitech

London, United Kingdom

$87k - $171k

Okx

Remote

$140k - $300k

Kraken

European Union

$106k - $110k

CoinTracker

United States

$175k - $210k

Blockchain

Remote

$93k - $115k

Blockchain

Remote

$68k - $90k

Blockchain

Remote

$105k - $120k

sigmasoftware2
$72k - $72k estimated
KrakĂłw, Poland

Company Description

Join a FinTech/blockchain initiative that’s redefining digital identification and payments. As a Senior iOS Developer, you’ll contribute to a mobile-first platform integrating blockchain, NFC, and QR technologies to deliver seamless identity verification, payments, and rewards. This role offers remote flexibility and the chance to work on a product with both mass-market appeal and B2B reach. At Sigma Software, we partner with forward-thinking companies to deliver innovative solutions. Here, you’ll be part of a project with global scale, cutting-edge tech, and strong growth potential. Why join us? You’ll work at the intersection of financial innovation, blockchain, and HealthTech, shaping solutions adopted worldwide.

CUSTOMER
Our Customer is a publicly listed technology company operating at the intersection of financial innovation, blockchain, and HealthTech. They focus on developing cutting-edge digital asset solutions, including a U.S. dollar-backed deposit token built with integrated digital identity and yield functionality. Combining blockchain with HealthTech applications, they aim for global adoption through strategic partnerships and strict compliance with financial regulations.

PROJECT
This mobile-first platform leverages blockchain, NFC, and QR technology to integrate retail loyalty programs with enterprise networking tools. Users can instantly share verified contacts, payments, and rewards. The product combines hardware and software integration with global reach and significant growth potential. Key technologies: iOS, Swift, UIKit/SwiftUI, blockchain, NFC, and QR code technology.

Job Description

  • Develop high-quality iOS applications following SOLID principles and Clean Architecture
  • Implement strong modularization of app components
  • Build design systems and reusable UI components
  • Collaborate with cross-functional teams, including Android developers and Back-end engineers

Qualifications

  • 5+ years of iOS app development experience
  • Deep knowledge of SOLID principles and Clean Architecture
  • Strong modularization skills
  • Experience building design systems and reusable components
  • Proficiency in Swift, UIKit, and SwiftUI
  • Upper-Intermediate level of English

WILL BE A PLUS

  • Experience with crypto wallets
  • Experience with video processing or streaming features