--- title: 'Web3 Security Engineer at Sky Mavis' canonical: 'https://feeny.ai/job/web3-security-engineer-sky-mavis-vietnam-ekn7qg7zz9sj' type: 'job' last_seen: '2026-09-06' --- # Web3 Security Engineer at Sky Mavis - **Company:** Sky Mavis - **Location:** Vietnam - **Employment:** full-time - **Work type:** onsite - **Posted:** 2026-03-06 - **Last confirmed live:** 2026-09-06 - **Apply:** https://jobs.ashbyhq.com/skymavis/4b58a7cf-538a-44c7-908b-da8918348efb ## Job description ## ABOUT SKY MAVIS Sky Mavis is building the future of gaming. We’re the creators of Axie Infinity, the most successful Web3 game ever, and Ronin, a purpose-built blockchain that ranked as the 4th most-used chain in 2024, behind Ethereum, Bitcoin, and Solana. We’ve processed over $4.3 billion in on-chain volume and are backed by more than $170 million from top-tier investors, including a16z, Accel, Libertus Capital, and Paradigm. Our team moves fast, builds with intention, and believes in a world where players truly own what they earn. If you’re excited by open economies, massive scale, and shaping new digital frontiers, join us. ## ABOUT THE ROLE The Security team drives Web2 and Web3 security for all of Sky Mavis games and digital assets, including the Ronin blockchain network, Ronin wallet, and more. With experience spanning many blockchain startups as well as recognized companies (Coinbase, Circle, JP Morgan Chase, Microsoft, Amazon, etc), the security team is building strong security policies and SDLC processes internally. The Web3 Security Engineer is responsible for the security of smart contracts developed by the engineering team. This individual will be embedded with the engineering team to drive security best practices and ensure the bulletproof safety of smart contracts deployed. The security engineer will perform threat modeling, running scanning tools, audit the code base, work closely with engineering to resolve security vulnerabilities, and ensure the secure deployment of smart contracts. Sky Mavis is fast adopting GenAI solutions to 100x our engineers. The security engineer will have the opportunity to learn and leverage AI to enhance and automate their workstream to improve our security best practices. This role is based in Ho Chi Minh City, Vietnam. ## WHAT YOU’LL DO - Security assessments: Perform internal and external assessments of products (games, wallet, etc) to ensure the highest level of security before launch, including conducting threat modeling, tabletop exercises, and code reviews. Put on your white hat and go hunt for security vulnerabilities. - Monitoring: Ensure smart contracts generate sufficient events to monitor. Leverage blockchain monitoring platform to continuously monitor smart contracts. - Incident response: Maintain and update a runbook of procedures for handling and escalating security incidents. Participate in the incident response process to address and resolve smart contract incidents. - Evaluate new technology: Identify and evaluate new security technologies/tooling to adopt internally to continuously improve Sky Mavis’ security best practices. - Drive impact: Identify security gaps and drive positive change to improve Sky Mavis’ security posture. - Cross-functional collaboration: Collaborate with the engineering team to identify security gaps in smart contract architecture. Works well with others and is highly responsive. ## WHAT WE LOOK FOR - Education: Bachelor or master degree in computer science or related field. - Experience: 2+ years in software engineering. Audited smart contracts. - Programming Languages: Strong knowledge of Solidity. - Skills/Knowledge: Hands-on expertise with blockchain and smart contract security. Able to audit Solidity code. Familiarity with blockchain monitoring solutions. - Attitude: Bias for action, driven to learn, top talent. - Strong communicator and active listener: Clear communication (English) and capable of building trust across diverse teams. - Problem-Solving: Strong analytical and problem-solving skills to identify and resolve security issues. - Bonus: Gamer, active crypto user, does hackathons on weekends. Nice to Have: - Python scripting. - Experience using LLMs. ## About Sky Mavis ## Company Overview - **One-liner**: Sky Mavis builds the virtual worlds of the future (notably Axie Infinity) and the Ronin blockchain infrastructure that makes them possible, pioneering player-owned economies in gaming. - **Entity Type**: Private (Series C, $311.9M total funding) - **Headquarters**: Central Business District, Singapore (with major offices in Ho Chi Minh City, Vietnam, and smaller hubs in the US, UK, and beyond) - **Founded**: 2019 - **Founders**: The founding team includes Aleksander Leonard Larsen (Co-Founder, former Chairman & COO), Jeffrey Zirlin (Co-Founder & Growth Lead), and others (the full founder set is not publicly named on the main site, but these two are widely recognized). ## Core Business - Primary industry/industries: Blockchain Gaming / Web3 Infrastructure - Target customers: B2B (game developers building on Ronin) and B2C (players of Axie Infinity and other Ronin-based games) - Mission or purpose statement: "Economic freedom, for everyone" — introducing the world to crypto through nostalgic games and practical applications, and building a future where blockchain powers everyday life. ## Products & Services For each major offering: - **[Axie Infinity]**: A pioneering blockchain-based virtual world and game where players collect, breed, battle, and trade cute creatures called Axies. It became the #1 blockchain game by all-time NFT volume, introducing millions to crypto through gameplay. - **[Ronin]**: An EVM-compatible blockchain specifically crafted for game developers building player-owned economies. It is the #1 gaming-centric blockchain by all-time NFT volume. It provides the infrastructure for fast, low-cost transactions. - **[Mavis Ecosystem / Mavis Products]**: A suite of tools and infrastructure products designed to give game developers everything they need to build and scale blockchain-infused games, including wallets, marketplaces, and SDKs. ## Market Standing - **Valuation/Market Cap**: Not publicly disclosed. However, the company has raised substantial funding (see below). - **Key Metric**: Annual Revenue of **$1.3B** (per LinkedIn company data) | Total Funding: **$311.9M**. - **Notable Investors/Partners**: Key investors include **Binance** (led Series C), **Animoca Brands** (led Seed round), and a broad syndicate of 21 investors in the Series B. The company is deeply integrated with the broader Web3 and gaming ecosystem. - **Growth Signals**: Despite a headcount reduction (-26.9% YoY to ~108 employees), the company is actively hiring (6 open positions as of mid-2025, with job postings up 500% year-over-year). They have successfully launched and scaled the Ronin blockchain, which hosts a growing ecosystem of games. The company has weathered major market downturns (the "crypto winter") and emerged battle-hardened, with a focus on long-term building. ## Competitive Advantages - **Proven Track Record**: Sky Mavis is the team behind Axie Infinity, the single most successful blockchain game to date, which proved the viability of player-owned economies at scale. - **Full-Stack Ownership**: They control both the top game (Axie Infinity) and the underlying infrastructure (Ronin), creating a unique, integrated flywheel. This allows for rapid iteration and deep integration that competitors cannot easily replicate. - **Battle-Hardened Team**: Having survived the collapse of FTX, a major Ronin bridge hack, and the crypto bear market, the team is described as "anti-fragile" and deeply experienced in navigating extreme volatility and crisis. - **First-Mover Advantage in Gaming L2s**: Ronin is the leading gaming-focused blockchain, giving them a significant head start in attracting developers and users compared to newer entrants. ## Strategic Focus - **Growing the Mavis Ecosystem**: The primary focus is on expanding the Ronin ecosystem beyond just Axie Infinity. They are actively courting third-party game developers to build on Ronin, aiming to become the default blockchain for Web3 gaming. - **Infrastructure as a Product**: They are productizing the tools and infrastructure they built for Axie Infinity (the "Mavis Ecosystem") to lower the barrier to entry for other game studios. - **Delivering Real Utility**: Moving beyond pure speculation, Sky Mavis is focused on building practical, fun applications that demonstrate the value of blockchain ownership to a mainstream audience. ## Why Work Here - **Impact and Ownership**: The company culture emphasizes "Ownership" — employees are given real stake in the products they build and are expected to take ownership of their work. You will work on "things the world has never seen before" and conduct experiments blending gaming, economics, and political science. - **Remote-First, Global Team**: While headquartered in Singapore, the team is distributed across 11+ countries (with a large hub in Vietnam). They offer "work arrangements" to support flexibility. - **Benefits**: The company offers a comprehensive benefits package including: competitive salary, top-tier healthcare (medical, dental, vision), mental health counseling/workshops, guild sponsorships for team bonding, personal vacation sponsorship, learning & development sponsorship, and a Macbook for every new joiner. - **Culture**: Described as "fast-paced, active, and immersive," with a focus on "fast iteration, calculated experimentation." The environment is for "explorers" and "paradigm builders" who are comfortable with ambiguity and a high degree of autonomy. The employer rating on LinkedIn is 3.6/5.0, with compensation rated highest (3.8) and culture (2.7) and career (2.9) as areas for improvement. - **The Mission**: The company's stated mission is "Economic freedom, for everyone," which provides a strong sense of purpose beyond just building a product. ## Sources 1. [skymavis.com](https://skymavis.com/) 2. [skymavis.com/careers](https://skymavis.com/careers) 3. [skymavis.com/team](https://skymavis.com/team) 4. [blog.skymavis.com](https://blog.skymavis.com/p/what-will-you-get-at-skymavis) 5. [linkedin.com/company/skymavis](https://sg.linkedin.com/company/skymavis) ## Other roles at Sky Mavis - [Legal Counsel / Paralegal](https://feeny.ai/job/legal-counsel-paralegal-sky-mavis-vietnam-y39a36777xf2) — Vietnam - [Security Operations Intern](https://feeny.ai/job/security-operations-intern-sky-mavis-vietnam-kfek14tx9mhr) — Vietnam - [Freelance Travel Spend & Market Explorer](https://feeny.ai/job/freelance-travel-spend-market-explorer-sky-mavis-vietnam-dz24fnnh9pdq) — Vietnam - [Cloud Security Engineer](https://feeny.ai/job/cloud-security-engineer-sky-mavis-vietnam-qrq31083zyx3) — Vietnam