Blockchain Jobs

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Job Position Company Posted Location Salary Tags

sigmasoftware2

Poland

$72k - $72k

BloXroute Labs

Hong Kong, Hong Kong

$105k - $150k

Alvarez & Marsal

New York, NY, United States

$80k - $120k

Polygon Labs

New York, NY, United States

$90k - $125k

P2P. org

European Union

Soliduslabs

Remote

$67k - $69k

Base

New York, NY, United States

$87k - $87k

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

Hivemind Capital Partners

London, United Kingdom

$36k - $60k

Binance

Middle East & North Africa

MoonPay

Remote

$81k - $84k

sigmasoftware2
$72k - $72k estimated
Kraków, 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

What does a blockchain developer do?

A blockchain developer is a software developer who specializes in the development of applications that make use of blockchain technology

Some of the responsibilities of a blockchain developer may include:

  • Designing and implementing smart contracts.
  • Creating and maintaining the infrastructure that supports the blockchain network, and developing user-facing applications that make use of the blockchain.
  • Additionally, a blockchain developer may also be responsible for researching and staying up-to-date with the latest developments in blockchain technology, in order to ensure that their applications are secure and efficient.