Senior Backend Engineer

Job not on LinkedIn

🕒 August 20

🇵🇹 Portugal – Remote

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 26%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Zerion

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2016

💼 Consulting

📦 Logistics

📣 Marketing

Consulting • Logistics • Marketing

Zerion is a comprehensive non-custodial crypto wallet and portfolio tracker designed for the multichain world of Web3. It allows users to manage their crypto assets, including tokens, NFTs, and DeFi positions, across all major blockchain networks seamlessly. Zerion provides features such as portfolio tracking, trading across decentralized exchanges, and on-chain security leveraging integration with hardware wallets like Ledger. The platform supports multiple EVM-compatible networks and integrates over 500 protocols, presenting users with the best trading deals and enabling transparency and security in all transactions. Zerion is built for Web3 enthusiasts, offering advanced features through an accessible app on multiple devices.

📋 Description

• 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 • Collaborate closely with product and engineering peers to shape product decisions • Scope solutions with clients building on the API and turn requests into concrete proposals and implementation plans • Build and evolve Web3 platform backend components, including protocol integrations, support for emerging blockchain networks, and smart-contract interactions • Ensure high standards of code quality, performance, security, and observability • Operate effectively in a fast-paced startup environment while balancing speed and correctness • Use AI throughout the engineering workflow for designing, reviewing, debugging, and shipping • Contribute to technical discussions, code reviews, and mentorship

🎯 Requirements

• 5+ years of experience designing and building distributed backend systems • Strong knowledge of algorithms, data structures, and software design patterns • Experience with containerized systems: Docker and Kubernetes • Experience with SQL databases, including Postgres • Experience with NoSQL databases, including MongoDB and Cassandra • Experience with monitoring and observability tools: Sentry, Prometheus, and Grafana • Hands-on experience with AWS (Amazon Web Services) • Experience with Python 3 • Comfort experimenting with and integrating AI-assisted workflows into daily engineering work • Excellent knowledge of Golang is a plus, not a blocker • Hands-on Web3 experience is a bonus • Located in time zones close to Europe is a bonus • Ability to work in a fast-paced startup environment • Ability to work directly with customers and turn vague problems into concrete proposals • Strong ownership mindset • Clear and proactive communication in a distributed team • Ability to learn quickly and adapt

🏖️ Benefits

• Competitive salary • Medical insurance • Coworking membership • Unlimited days off • Flexible work schedule • Software and equipment for working from home • Stock options • Travel to industry events and annual team offsite • Fully remote work • Asynchronous collaboration • Healthy work-life balance