Backend Engineer (Zerion API)

unlimited holidays - fully flexible
Work set-up: 
Full Remote
Contract: 
Full time
Experience: 
Mid-level (2-5 years)
Work from: 
Anywhere

Offer summary

Qualifications:

At least 3 years of backend engineering experience., Strong understanding of clean, maintainable code and debugging complex systems., Familiarity with Blockchain systems, dApps, and smart contracts., Good communication skills and ability to work independently in a remote team..

Key responsibilities:

  • Develop and deploy new features for the API.
  • Troubleshoot and resolve bugs impacting partners.
  • Maintain backend systems supporting the API.
  • Collaborate with product teams and external partners.

Zerion logo
Zerion Fintech: Finance + Technology Startup https://zerion.io/
11 - 50 Employees
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Job description

Zerion is building the future of on-chain finance—and we’re looking for a Middle Backend Engineer to help us scale that vision. You'll join our API team, working at the heart of our infrastructure to power new features, solve urgent challenges, and support developers building the next generation of Web3 apps. If you're excited by clean architecture, fast feedback loops, and the opportunity to shape how developers build on-chain, you’ll feel right at home here.

What you will do
  • Develop and ship new features for our API.
  • Triage and fix bugs quickly—especially partner-impacting issues.
  • Build and maintain backend systems powering our API.
  • Collaborate with products to shape features and improve partners onboarding.
  • Be the first technical point of contact for integration partners—bringing empathy and clarity to external problem-solving.
  • Continuously improve our technical docs, and internal tooling to enhance developer experience.

    • Who we are looking for
  • 3+ years of backend engineering experience.
  • Solid fundamentals: you write clean, maintainable code and understand how to debug complex systems.
  • Familiarity with Blockchain systems, dApps, and smart contracts.
  • Great communication and soft skills—you can translate technical details clearly, both internally and externally.
  • Comfortable owning tasks independently in a remote-first, async team.
  • You take initiative, solve problems quickly, and care about product quality.

    • Bonus Points
  • Professional experience with Go.
  • Familiarity with multi-chain ecosystems (EVM chains, L2s, Solana, etc.).
  • Strong grasp of API development: REST, token-based auth, error handling, etc.
  • Experience building or contributing to Web3 projects (personal or commercial).
  • Enjoy helping others succeed—whether it’s teammates or external devs.

    • About You
  • You love building resilient, elegant systems that developers enjoy using.
  • You have the ability to work in multitasking mode.
  • You enjoy learning new technologies.
  • You value clarity, collaboration, and continuous improvement.
  • You’re excited by the opportunity to shape how the next wave of Web3 builders get started.

    • Interview Process
  • Intro Call (30 mins): Meet the team and align expectations
  • Hiring Manager Interview (45 mins): Discussion of your professional background, motivation and Web3-specific questions
  • Technical Session (90 mins): Assess problem-solving and backend/API skills
  • Team Interview (60 mins): Evaluate collaboration style and team add
  • Founders Call (60 mins): Discuss long-term vision and your role in it
  • Reference Check

    • Required profile

    Experience

    Level of experience: Mid-level (2-5 years)
    Industry :
    Fintech: Finance + Technology
    Spoken language(s):
    English
    Check out the description to know which languages are mandatory.

    Hard Skills

    Smart ContractsBlockchainApplication Programming Interface (API)Front End (Software Engineering)Exception HandlingGo (Programming Language)Authentication ServersFood ChainWeb Project

    Other Skills

    • Collaboration
    • Communication
    • Problem Solving
    Are you interested?

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