What You’ll Do
- Design, build, and maintain scalable distributed backend systems powering platform and product capabilities.
- Own backend services end-to-end: from architecture and implementation to monitoring and long-term reliability.
- Work closely with product and engineering peers to actively shape product decisions — not just execute specs.
- Build and evolve Web3 platform backend components, including protocol integrations, support for newly emerging blockchain networks, and reliable interactions with smart contracts.
- Ensure high standards of code quality, performance, security, and observability.
- Operate comfortably in a fast-paced startup environment, balancing speed and correctness.
- Leverage AI-assisted tools to improve development velocity, code quality, and personal productivity.
- Contribute to technical discussions, reviews, and mentorship within the engineering team.
What We’re Looking For
- 5+ years of experience designing and building distributed backend systems.
- Strong foundation in algorithms, data structures, and software design patterns.
- Hands-on Web3 experience: Blockchain systems, dApps, Smart contracts.
- Strong ownership mindset — you take responsibility for outcomes, not just tasks.
- Clear, proactive communication in a distributed, async-first team.
- Ability to make pragmatic decisions: knowing when to move fast vs. go deep.
- High learning velocity and adaptability, especially when new tools or approaches (including AI-driven ones) improve results.
Technical Skill Set
- Excellent knowledge of Golang.
- Experience with containerized systems: Docker & Kubernetes.
- Databases: Postgres (SQL), MongoDB, Cassandra (NoSQL).
- Monitoring & observability: Sentry, Prometheus, Grafana.
- Hands-on experience with AWS.
- Experience with Python 3.
Bonus Points
- Prior experience working in a startup environment with high trust and autonomy.
- Located in time zones close to Europe.
- Strong collaboration skills and respect for diverse perspectives.
- Curiosity and willingness to challenge existing solutions when better ones exist.
- Thoughtful use of AI as a productivity multiplier, while maintaining a deep understanding of underlying systems and trade-offs.
Interview Process
- Screening Call – 30 minutes
- Hiring Manager Interview – 45 minutes
- Technical Interview – 60 minutes
- System Design Interview – 90 minutes
- Team Interview – 60 minutes
- Founders Call – up to 60 minutes
- Reference Check
Top Skills
What We Do
At Zerion, we are on a mission to empower more people around the world with efficient, transparent, and censorship-resistant financial services.
We do this by building applications, tools, and infrastructure enabling any smartphone holder, anywhere in the world, to build and manage their decentralized finance (DeFi) portfolios. The company was founded in 2016 by a technical team of crypto-native builders who sought to change the way centralized financial services work, primarily driven by experiencing the lack of financial opportunity within their countries.
Zerion has grown to become one of the most popular DeFi interfaces in the world. Since inception, Zerion has processed over $1 billion in transaction volume and serves more than 200K monthly active users from over 150 countries.
It has attracted significant investment from experienced investors such as Mosaic Ventures (investors in Alibaba Group and Pinterest), Lightspeed Ventures (investors in Snapchat), Placeholder Ventures, DeFi Alliance Fund, Continue Capital, DCG, and G1 Ventures amongst others. In 2019 and 2020, Zerion was awarded with the ‘best crypto UX/UI’ awards at DevCon Osaka 5 and London-based City AM’s inaugural Crypto AM awards respectively.
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