---
title: 'Security Engineer at Ether.fi'
canonical: 'https://feeny.ai/job/security-engineer-ether-fi-cayman-islands-tztb3kb47rec'
type: 'job'
last_seen: '2026-09-11'
---

# Security Engineer at Ether.fi

- **Company:** Ether.fi
- **Location:** Cayman Islands
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-02
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/ether.fi/64b9a6e8-9173-4551-a229-d25b28b9d081

## Job description

About the Role: We're looking for a Security Engineer who is equally at home hardening a CI/CD pipeline, reviewing a change to the authentication system on the backend, and triaging a bug bounty submission before lunch.This is a hands-on, builder-first role — not a governance checkbox. You'll own security operations end-to-end, embedded directly into the engineering team and working closely with infrastructure, protocol and platform. If you treat threat modeling as a design conversation and not a compliance exercise, you're our kind of person. You should only apply for this role if you are ready to come into the office every day and work in person with our team!

What You'll Do: Security Operations Own day-to-day security operations: monitoring, alerting, triage, and response Manage and monitor endpoint security via an EDR system — tune detections, investigate alerts, and drive incidents to resolution Lead identity lifecycle management, including employee onboarding and off boarding (access provisioning, key rotation, deprovisioning)

Bug Bounty & Vulnerability Management Be the primary owner of our ImmuneFi program — triaging, reproducing, and responding to incoming submissions daily Prioritize and track vulnerabilities through to remediation in close collaboration with protocol and engineering teams Develop internal tooling and processes to make the bounty workflow faster and more consistent

DevSecOps & Pipeline Hardening Audit and harden CI/CD pipelines — secrets management, supply chain integrity, SAST/DAST integration, build provenance Own dependency security: identify and remediate vulnerable packages across repositories (yes, including the npm dependency hell) Establish and enforce security standards across the SDLC

Infrastructure Security Partner with the infrastructure team to review and harden cloud environments (access controls, network segmentation, least privilege, logging) Contribute to threat modeling for new systems and architectural changes

Drive implementation of security tooling across the stack

Vendor & External Partner Management Own relationships with external security vendors and service providers — holding them accountable toSLAs, managing scope, and ensuring findings are actioned Evaluate and onboard new security tooling as the team and threat landscape evolve

What We're Looking For: 5–8+ years of experience in software and security engineering, with meaningful time in a DevSecOps or security operations context Strong software engineering fundamentals — you're a builder who writes code, not just policy Hands-on experience hardening CI/CD pipelines (GitHub Actions, CircleCI, or similar) and cloud infrastructure (AWS, GCP, or equivalent) Proficiency with endpoint security tooling (CrowdStrike or equivalent EDR) Comfort owning identity and access management processes, including onboarding/offboarding workflows Strong communication skills — you can write a clear triage report, give direct feedback to a developer and explain risk to a non-technical stakeholder

Nice to Have: You were a traditional software engineer before specializing in security Prior experience at a DeFi protocol, crypto exchange, or blockchain infrastructure company CTF/security competition background Contributions to open-source security tooling

What Success Looks Like: In your first 90 days, you've mapped our attack surface, established a daily rhythm on ImmuneFi, and shipped at least a few meaningful PRs across the full stack. Within six months, you've built enough trust in the team that engineers come to you before shipping sensitive PRs, not after.

## About Ether.fi

## Company Overview
- **One-liner**: Ether.fi is a leading non-custodial liquid staking protocol and DeFi ecosystem building the rails for decentralized, on-chain banking.
- **Entity Type**: Private (Series A)
- **Headquarters**: George Town, Cayman Islands
- **Founded**: 2022
- **Founders**: Mike Silagadze (CEO) and Rok Kopp

## Core Business
- **Primary Industry**: Decentralized Finance (DeFi) / Liquid Staking / Crypto Financial Services
- **Target Customers**: Crypto-native individual stakers (B2C), institutional node operators, and DeFi users seeking yield and spending products.
- **Mission**: To put users in charge of their wealth—making it easy to save, earn, and spend crypto in a secure, transparent, and non-custodial way.

## Products & Services
- **[Stake (eETH/weETH)](https://www.ether.fi/careers)**: A non-custodial liquid staking protocol. Users stake ETH or stETH and receive eETH (or weETH for DeFi composability), which accrues staking rewards and can be used across DeFi. It is natively re-staked to earn additional yield.
- **[Liquid](https://www.ether.fi/careers)**: Automated strategy vaults that find and optimize yields for users across DeFi protocols.
- **[Cash](https://www.ether.fi/careers)**: A Visa credit card product allowing users to spend and borrow against their crypto assets without selling them. Includes a KYC process and fraud detection.
- **[eBTC](https://www.ether.fi/blog/non-custodial-actively-defended)**: A liquid staking token for Bitcoin, extending the protocol’s non-custodial staking model.
- **[eUSD](https://www.ether.fi/blog/non-custodial-actively-defended)**: A stablecoin product within the ether.fi ecosystem.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company).
- **Key Metric**: Over **$10B in assets under management (AUM)** as of June 2026. The company has been **profitable since day one**.
- **Total Funding**: $32.3M raised across 4 rounds (Series A).
- **Notable Investors**: CoinFund, Node Capital, Chapter One (26 institutional investors and 4 angel investors total).
- **Growth Signals**: A team of ~30 people (almost all technical staff) managing over $10B in AUM, demonstrating extreme capital efficiency. The company is actively expanding its product suite into consumer credit cards (Cash) and Bitcoin staking (eBTC), signaling a move from pure DeFi infrastructure to end-user financial applications.

## Competitive Advantages
- **Non-Custodial + Actively Defended**: The protocol is designed so that ether.fi cannot unilaterally move user funds (non-custodial), but it can pause the system and block in-flight attacks to protect users. This is a unique security doctrine that avoids the "decentralization theater" that leaves users drained during exploits.
- **Four-Layer Security Architecture**: Operational security (key/infra hygiene), smart contract bounds (timelocks, rebate caps), crosschain defenses (4-of-4 DVN quorum, per-chain rate limits), and real-time active defense (wired to Hypernative monitoring).
- **Capital Efficiency**: A tiny team (~30) manages a massive $10B+ asset base, indicating highly automated, lean operations and strong technical leverage.
- **Profitability**: Profitable from day one, avoiding the "ponzinomics" and unsustainable token models common in the space.

## Strategic Focus
- **Building Real Consumer Applications**: The company is focused on moving beyond pure DeFi infrastructure into mainstream financial products like the Ether.fi Cash Visa card, bridging the gap between crypto and everyday spending.
- **True On-Chain Banking**: The long-term vision is to offer a full suite of non-custodial financial services (savings, lending, spending) entirely on-chain.
- **Security-First Growth**: The public security doctrine (non-custodial, actively defended) is a core differentiator and a key focus of engineering effort, as outlined in their blog.

## Why Work Here
- **High Impact, Small Team**: With ~30 employees and $10B+ in AUM, every employee has outsized responsibility and influence on the product and protocol.
- **Top Compensation**: Annual performance-based bonuses, option to be paid in ETH, and a share of token allocation.
- **Wellness Benefits**: Unlimited paid time off, one month per year to work fully remotely, plus health, dental, and vision coverage.
- **In-Office Collaboration**: The company emphasizes in-person work (79% on-site, 16% hybrid) with offices in New York, Denver, Grand Cayman, and Dubai. They believe face-to-face interaction drives success.
- **Culture & Events**: Frequent company off-site retreats (e.g., Cayman Islands, Lisbon) and attendance at top crypto events.
- **Engineering Culture**: A builder-first environment with a focus on security, smart contract engineering, and real-time fraud/scam hunting. The interview process includes a skills-based interview and a final meeting with the CEO.
- **Guiding Principles**: Decentralization is a primary objective, sustainable revenue model, and "never compromise on ethics."

## Sources
1. [ether.fi Careers Page](https://www.ether.fi/careers)
2. [ether.fi Security Doctrine Blog](https://www.ether.fi/blog/non-custodial-actively-defended)
3. [Tracxn - ether.fi Company Profile](https://tracxn.com/d/companies/etherfi/__ybuswctFLX6Yyk0tndtj8aoDimNowhN3z_XQDPgnARo)
4. [Jobera - ether.fi Careers](https://jobera.com/employer/ether-fi/)
5. [ether.fi Jobs on Ashby](https://jobs.ashbyhq.com/ether.fi)

## Other roles at Ether.fi

- [Software Engineer: Credit Card/Fraud](https://feeny.ai/job/software-engineer-credit-card-fraud-ether-fi-new-york-jynqeb4rzj9a) — New York, NY
- [Head of Ecosystem & Partnerships](https://feeny.ai/job/head-of-ecosystem-partnerships-ether-fi-cayman-islands-v2je5k678km7) — Cayman Islands
- [Fraud Engineer](https://feeny.ai/job/fraud-engineer-ether-fi-new-york-xa438zcavkrz) — New York, NY
- [Senior Frontend Engineer](https://feeny.ai/job/senior-frontend-engineer-ether-fi-cayman-islands-jy8j9v326k31) — Cayman Islands
- [Data Insights & Analytics Lead](https://feeny.ai/job/data-insights-analytics-lead-ether-fi-cayman-islands-aa10rxkvkv0v) — Cayman Islands
- [Smart Contract Lead](https://feeny.ai/job/smart-contract-lead-ether-fi-new-york-y7nb97z7sg7n) — New York, NY
- [Fraud Lead (Scan Hunter)](https://feeny.ai/job/fraud-lead-scan-hunter-ether-fi-new-york-ggw0merc1p78) — New York, NY
- [Senior Full Stack Software Engineer](https://feeny.ai/job/senior-full-stack-software-engineer-ether-fi-new-york-6wnw9p39xvcm) — New York, NY
- [Smart Contract Engineer](https://feeny.ai/job/smart-contract-engineer-ether-fi-cayman-islands-fd7de65crxxw) — Cayman Islands
- [Front End Engineer](https://feeny.ai/job/front-end-engineer-ether-fi-new-york-mb3h6p7nyqgr) — New York, NY