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  • Posted: May 21, 2026
    Deadline: Not specified
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  • Quidax is the simplest and most secure way to buy and sell bitcoin, ethereum, ripple and other altcoins.
    Read more about this company

     

    Product Designer

    About the Role

    • You own the end-to-end user experience for a specific product pillar. You are the day-to-day champion for the user, working in a "squad" alongside Product Managers and Engineers.

    What You’ll Be Owning

    • End-to-End Pillar UX: Designing full user journeys, wireframes, and high-fidelity interfaces for your dedicated product area (e.g., Payments, Onboarding).
    • Tactical User Research: Planning, executing, and synthesizing usability studies and user interviews to validate your specific feature designs.
    • Handoff & Implementation QA: Creating detailed developer handoff files and performing "design QA" on builds to ensure the final product matches the intent.
    • Design System Contribution: Actively identifying gaps in our component library and proposing new patterns to the Design System Lead.

    What We’re Looking For

    • Problem Solver: You start with the user problem, not the solution, and can iterate quickly through wireframes to find the best flow.
    • Visual Executor: You have a high bar for UI design and can deliver polished, high-fidelity designs that are ready for production.
    • User Advocate: You are comfortable running your own usability tests and using that feedback to kill your "darlings" for the sake of the user.
    • Autonomous Worker: You thrive in a squad environment and can manage your own time and priorities alongside a Product Manager.

    go to method of application »

    Software Engineer (Java_Spring Boot)

    ​​​​​​About the Role

    • We're hiring a Mid-Level Java, Spring Boot Engineer to work on the core backend systems that power how customers trade, move money, and interact with the Quidax platform. You'll join a team working on the flows that matter most: APIs, integrations, transaction processing, and the reliability of systems that real customers depend on every day. It's a great role for an engineer who's ready to go deeper, take real ownership, and grow fast in a fintech environment.

    What You’ll Be Owning

    Learn and Contribute

    • First 30 days: Get across the core Java/Spring Boot services, understand the critical flows, and ship your first meaningful fix.
    • By month 3: Own specific features or services end to end, with support from the team where needed.
    • By month 6: Independently investigate and resolve reliability issues across APIs, integrations, and transaction flows.

    Reliability and Code Quality

    • Reduce recurring issues: stuck transactions, failed callbacks, unclear states, and manual escalations.
    • Improve test coverage across critical flows and leave every area you touch cleaner than you found it.
    • Add observability where it's weak: better logging, alerts, and debugging hooks.

    Team and Growth

    • Participate in code reviews, share what you learn, and support engineers around you.
    • Grow your understanding of transaction heavy systems: idempotency, retries, state machines, and reconciliation.

    Biggest Challenges You’ll Tackle

    • Working on backend systems where failures have real customer impact.
    • Debugging complex, transaction heavy flows that aren't always well documented.
    • Balancing new feature work with improving the stability of existing systems.
    • Learning fintech and crypto infrastructure concepts on the job and applying them quickly.

    What We’re Looking For

    Must-haves

    • 3 to 5 years of Java Spring Boot backend experience in production environments.
    • You write clean code, debug with patience, and care about how your work affects real users.
    • Comfortable with REST APIs, background jobs, database design, testing, and debugging.
    • Methodical debugger: you trace flows, read logs, and find the real root cause.
    • You improve code incrementally without defaulting to a full rewrite.
    • Bonus: Experience in fintech, payments, crypto, or transaction heavy backend systems.

    Nice to Haves

    • Familiarity with transaction concepts: idempotency, retries, reconciliation, state machines.
    • Experience working in a remote startup environment.
    • Any exposure to crypto exchanges, payment providers, bank integrations, or Java ecosystem tools like Kafka, JPA, or Hibernate.

    go to method of application »

    Software Engineer(Ruby, Ruby on Rails)

    About the Role

    • We're hiring a Mid-Level Rails Engineer to work on RAMP, our on-ramp/off-ramp product that helps users move money in and out of crypto. You'll join a focused team working on the flows that matter most: deposits, withdrawals, partner integrations, and reconciliation. It's a great role for an engineer who's ready to go deeper, take real ownership, and grow fast in a fintech environment.

    What You’ll Be Owning

    Learn & Contribute

    • First 30 days: Get across the RAMP codebase, understand the core flows, and ship your first meaningful fix.
    • By month 3: Own specific features or flows end to end, with support from the team where needed.
    • By month 6: Independently investigate and resolve reliability issues across deposits, withdrawals, and partner callbacks.

    Reliability & Code Quality

    • Reduce recurring issues: stuck transactions, failed callbacks, unclear states, and manual escalations.
    • Improve test coverage across critical flows and leave every area you touch cleaner than you found it.
    • Add observability where it's weak: better logging, alerts, and debugging hooks.

    Team & Growth

    • Participate in code reviews, share what you learn, and support engineers around you.
    • Grow your understanding of transaction-heavy systems: idempotency, retries, state machines, and reconciliation.

    Biggest Challenges You’ll Tackle

    • Working on backend systems where failures have real customer impact.
    • Debugging complex, transaction-heavy flows that aren't always well documented.
    • Balancing new feature work with improving the stability of existing systems.
    • Learning fintech and crypto infrastructure concepts on the job and applying them quickly.

    What We’re Looking For

    Must-haves

    • 3 to 5 years of Rails backend experience in production environments.
    • You write clean code, debug with patience, and care about how your work affects real users.
    • Comfortable with APIs, background jobs, database design, testing, and debugging.
    • Methodical debugger: you trace flows, read logs, and find the real root cause.
    • You improve code incrementally without defaulting to a full rewrite.
    • Bonus: Experience in fintech, payments, crypto, or on-ramp/off-ramp products.

    Nice to haves:

    • Familiarity with transaction concepts: idempotency, retries, reconciliation, state machines.
    • Experience working in a remote startup environment.
    • Any exposure to crypto exchanges, payment providers, or bank integrations.

    Method of Application

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