Senior Software Engineer (Kotlin / Crypto)

RYZ Labs is seeking an experienced Senior Software Engineer to join a dynamic technology team in the financial and crypto industries.

Key Responsibilities

• Design, develop, and maintain backend services using Kotlin, ensuring scalability, performance, and reliability
• Build and integrate systems for financial and crypto products, including wallets, exchanges, payment platforms, and blockchain-based services
• Collaborate with product managers, designers, and engineers to define and deliver robust technical solutions
• Participate in architectural decisions, code reviews, and continuous improvement of engineering practices
• Ensure security, data integrity, and system resilience in highly sensitive financial environments
  
  
  

Requirements

• 5+ years of experience as a Software Engineer
• Solid experience with Kotlin for backend development
• Previous experience in crypto, blockchain, fintech, or financial systems
• Strong understanding of backend architecture, APIs, and distributed systems
• Experience working with databases (SQL and/or NoSQL)
• Familiarity with cloud environments and modern deployment practices
  
  
  

Nice to have

• Experience with blockchain protocols, Web3 ecosystems, or smart contracts
• Strong knowledge of security best practices in financial or crypto platforms
• Background in fast-paced startup or scale-up environments
• Experience with Java or JVM-based ecosystems
  
  
  

About RYZ Labs

RYZ Labs is a startup studio founded in 2021 by two lifelong entrepreneurs. The founders have worked at some of the world’s largest tech companies and most iconic consumer brands, and bring decades of experience across the US and Latam markets. Their shared passion lies in the early stages of company creation and in attracting top-tier talent to build industry-defining companies in a post-pandemic world.

Our teams are remote and distributed throughout the US and Latam, leveraging cutting-edge cloud technologies to build scalable and resilient applications. We provide diverse product solutions across industries and plan to launch a large number of startups in the coming years.

At RYZ, engineers work with high autonomy and ownership, participating in every step of the development lifecycle. We foster an environment focused on learning, growth, and tackling challenging, high-impact projects alongside talented professionals.

Our Values & What To Expect

Customer First Mentality – Every decision is made through the lens of the customer.

Bias for Action – Urgency matters; timelines move fast.

Ownership – Step up when you see an opportunity, even beyond your core role.

Humility & Respect – Be open to learning, vulnerability, and collaboration.

Frugality – Do more with less through smart, efficient solutions.

Deliver Impact – Focus on execution and meaningful outcomes.

Raise Our Standards – Continuous improvement is part of our DNA.