We're looking for a Senior Backend Engineer to join our backend team at Zerion.
This team builds and evolves the backend systems at the core of our products and customer-facing solutions.
In this role, you'll design and operate distributed systems, work with Web3 infrastructure, and collaborate closely with product, support, and the clients building on our API to deliver reliable, scalable solutions.
We value strong ownership, thoughtful system design, and a high bar for code quality.
If you enjoy building solid systems, moving fast without cutting corners, and using AI as a core part of how you work, you'll feel right at home with us.
Design, build, and maintainscalable distributed backend systemspowering platform and product capabilities.
Ownbackend services end-to-end: from architecture and implementation to monitoring and long-term reliability.
Work closely withproduct and engineering peersto actively shape product decisions — not just execute specs.
Scopesolutions with the clientsbuilding on our API: turn a vague request into a concrete proposal, and the proposal into a plan the team can build.
Build and evolveWeb3 platform backend components, including protocol integrations, support for newly emerging blockchain networks, and reliable interactions with smart contracts.
Ensurehigh standards of code quality, performance, security, and observability.
Operate comfortably in afast-paced startup environment, balancing speed and correctness.
Use AI as a core partof your engineering workflow — designing, reviewing, debugging and shipping with it. This is how the team works day to day, not an experiment we're running.
Contribute totechnical discussions, reviews, and mentorship within the engineering team.
5+ yearsof experience designing and buildingdistributed backend systems.
Strong knowledge ofalgorithms, data structures, and software design patterns.
Comfortable working in afast-paced startup environment.
Strong desire toactively contribute to product evolution, not just implementation.
Comfortableworking directly with customers— hearing a vague problem and coming back with a concrete proposal.
Hands-on,daily use of AI in your engineering work. You should be able to talk concretely about where it has changed how you build, and where you've learned not to trust it.
High standards forcode quality, system reliability, and user experience— you care about getting it right, not just getting it done.
Strongownership mindset— you take responsibility for outcomes, not just tasks.
Clear and proactivecommunicationin a distributed team.
Pragmatic decision-making: knowing when tomove fast vs. go deep.
Ability tolearn quickly and adapt.
Excellent knowledge ofGolang is a plus, not a blocker.
Experience withcontainerized systems: Docker & Kubernetes.
Experience withdatabases:
SQL: Postgres
NoSQL: MongoDB, Cassandra
Experience withmonitoring and observability tools: Sentry, Prometheus, Grafana.
Hands-on experience withAWS (Amazon Web Services).
Experience withPython 3.
Comfort experimenting with and integratingAI-assisted workflowsinto daily engineering work.
Hands-on Web3 experience:Blockchain systems, dApps, Smart contracts.
Prior experience in astartup environmentthat emphasizestrust and autonomy.
Located intime zones close to Europefor smoother collaboration.
Collaborative mindsetand respect for different perspectives.
Curiosity and willingness tochallenge existing solutionswhen better ones exist.
Screening Call– 30 minutes
Hiring Manager Interview– 45 minutes
Technical Interview– 90 minutes (includes a real-world challenge where you'll work with AI tools directly)
System Design Interview– 90 minutes
Team Interview– 60 minutes
Founders Call– up to 60 minutes
Reference Check
Why You Should Join
Company Overview
Zerion API
Trusted by 50+ top crypto brands as paying clients
Powering 2k+ active clients monthly
Over 3.1B total requests processed
Zerion Wallet
1.7M+ active funded wallets
27.6M+ transactions
2.5B+ transaction volume
416K+ unique holders of Zerion DNA NFT
Culture: Our culture shines through in our strong team engagement and impressive retention, showing just how much we value creating a workplace where people truly want to stay and thrive.
People: Collaborate with some of the most driven and intelligent individuals in the crypto space.
Salary & Benefits: Receive a competitive salary, medical insurance, coworking membership, and additional benefits.
Unlimited Days Off and Flexible Work Schedule: Recharge and explore life outside the office with our flexible time-off policy and work schedule.
Remote Work Essentials: We provide all the necessary software and equipment to ensure you're fully equipped to work from home comfortably and efficiently.
Stock Options: Contribute to Zerion's success and watch your stock options become valuable.
Travel: Connect with your teammates around the world at industry events and our annual team offsite.
Distributed Team: Zerion is a fully remote team with members worldwide. Embrace asynchronous collaboration, find your own work rhythm, and enjoy a healthy work-life balance.
To ALL recruitment agencies and individual recruiters: Zerion only accepts resumes from its partners, with whom Zerion has contractual relations. Zerion is not responsible for any fees or charges associated with unsolicited resumes.
