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Android Developer

BluefinBratislava, SlovakiaOnsite
At Bluefin, we thrive in a dynamic and fast-paced environment where innovation and leadership are at the forefront of everything we do. Join us in revolutionizing data security within the integrated payments industry, as we protect over 35,000 companies across 59 countries with our cutting-edge encryption and tokenization technologies. Our collaborative culture empowers you to take initiative and make impactful contributions, while our commitment to professional growth ensures you have the tools and opportunities to excel. Embrace the challenge of working in a vibrant atmosphere that values agility and leadership, and be part of our mission to create secure, frictionless experiences for businesses and their customers. If you’re ready to drive change and make a difference, we invite you to embark on this exciting journey with us!
We are seeking an experienced and security-focused Payment Systems Fullstack Developer to join our product team building Android-based payment applications. You will primarily work on the development and maintenance of our Android POS terminal software, occasionally contributing to auxiliary tools and apps that support our core products. Security is at the heart of what we do—we adhere to strict standards like PCI DSS and P2PE, and you'll play a key role in upholding them. This role reports to the Team Lead, Terminal Development.

  • Develop and maintain secure and scalable Android POS applications.
  • Implement cryptographic protocols, secure communication, and secure data storage.
  • Collaborate with QA, security, and backend teams for full-stack alignment.
  • Ensure full compliance with PCI, P2PE, and other relevant standards.
  • Design, build, and troubleshoot supporting applications and backend services.
  • Integrate with hardware-level APIs and embedded systems where needed.
  • Write clean, maintainable, well-documented, and testable code.

To perform this job successfully, the individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions:

  • Proficiency in Java and Android SDK is essential, with the ability to develop, maintain, and optimize Android applications.
  • Knowledge of EMV, contactless payments, or terminal-level SDKs is preferred, particularly for those with experience in payment processing or POS integrations.
  • A solid understanding of Cryptography is required, including implementing encryption, key management, and secure data storage in accordance with industry best practices.
  • Familiarity with Kotlin is preferred, as it is increasingly used for modern Android development.
  • Understanding of Lua is preferred, particularly in scripting for embedded systems or application customization.

Bluefin provides equal employment opportunities to all employees and applicants without regard to gender, civil status, family status, sexual orientation, religion, age, disability, race (which includes a person’s colour, nationality, ethnic or national origins), or membership of the Traveller community, in accordance with the Employment Equality Acts.

Life at Bluefin

BLUEFIN, LLC is a national roof, pavement, and building envelope consultant serving clients with large facility footprints. We focus on these areas because theyᅢᄁ¬ツᆲ¬トᄁre typically the largest investments for our clients. They also hold the greatest opportunities to improve facility performance. We deliver an innovative portfolio approach to asset management that significantly reduces costs while improving facility performance. Examples of our current work include: System-wide roof and pavement asset management for 50 schools for a public school district in CO. Pavement management for one of the largest freight railroad networks in North America Roof management for the DC Department of General Services, including assessment, preventive maintenance, leak response, capital planning, design and construction quality assurance. Design and program management of Washington DC SmartRoof program, the nationᅢᄁ¬ツᆲ¬トᄁs first comprehensive, roof-based, clean technology implementation, deploying solar PV, vegetated roofs, and cool roofs on city-owned facilities. Roof management for a large oil services company on over 500 facilities in the US and Canada management including assessment, capital planning, leak response, design management and construction quality assurance. Roof asset management program for over 60M square feet of roofs to the US Air Force nationwide. Management of roof, pavement and building envelope assets for a very large, nationally dispersed food processing company. BLUEFIN, LLC is a privately held company. While we have extensive relationships among contractors and material product suppliers throughout the industries we serve, we maintain complete financial independence and objectivity so that we can put the ownerᅢᄁ¬ツᆲ¬トᄁs priorities first in all of our business dealings. Our headquarters is in Denver, Colorado and we have offices throughout the U.S.
Thrive Here & What We Value- Decentralized Exchange Infrastructure- Early Stage Development- Experienced Team- Shared Passion for Learning- Relentless Drive to Improve- Customer Focus- Collaborative Environment- Agile Methodology- Open Communication- Continuous Innovation

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