AWS Jobs in Web3

KAST is redefining stablecoin banking for global citizens, crypto professionals, Web3-native businesses, and high-inflation markets seeking USD-backed banking. We’re building the world’s first truly global money app including crypto cards, local accounts, and global payouts in a premium product with top acceptance rates.

Backed by leading investors and led by the former APAC CEO of Circle, our team brings experience from Circle, Airwallex, Revolut, Wise, Grab, Zoom, AWS, and top OTC desks. Since July 2024, we’ve scaled from zero to nearly a million users, becoming the go-to card for the crypto community.

By building directly on-chain, we offer what traditional financial rails can’t: instant yield, flexible collateralized lending, and enhanced investment products. Our cards bring stablecoins to life: spend at 100M+ merchants, withdraw at ATMs, and enable new ways to access credit.

Our culture is velocity × excellence. We move fast, obsess over product quality, and aim to outpace legacy players. Our ambition is clear: to build the next generation of financial services and make KAST the #1 stablecoin bank globally.

The Cost Accountant plays a key role in building and scaling KAST. This is a high-ownership position where you’ll take responsibility for meaningful work from day one, collaborate closely with cross-functional teams, and help turn ambitious goals into real-world outcomes.

Your mission is to move fast and raise the bar. You’ll operate in a dynamic, high-growth environment, navigate ambiguity with confidence, and contribute to financial systems and processes that scale with the company. Quality matters, speed matters, and ownership is non-negotiable.

This role is for builders, people who take initiative, think in systems, and care deeply about doing great work. If you’re excited about working at the intersection of finance, technology, and impact, you’ll feel right at home at KAST.

• Track, analyze, and report operational and product costs across the business, including blockchain, infrastructure, vendor, and transaction-related costs
• Build and maintain cost allocation models for on-chain and off-chain activities, products, and business lines
• Monitor and analyze unit economics (e.g. cost per transaction, user, wallet, chain, product)
• Partner with Engineering, Product, and Operations to understand cost drivers such as cloud usage, nodes, gas fees, vendors, and tooling
• Prepare monthly cost reporting, variance analysis, and budget vs. actuals reviews
• Support pricing, margin analysis, and profitability for new and existing products
• Ensure accurate expense classification in line with IFRS / US GAAP, including crypto-specific considerations
• Partner with HR and Finance on payroll oversight, salary benchmarking, headcount cost tracking, and overall people cost control to support sustainable growth.
• Support vendor cost management, contract reviews, and cost optimization initiatives
• Assist with audits, tax, and regulatory reporting by providing cost and supporting data
• Improve and automate cost tracking, reporting, and dashboards
• Collaborate with Finance and Compliance on controls, documentation, and governance

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• Experience as a Cost Accountant or similar role in tech, fintech, crypto, or any high-growth environment
• Strong understanding of cost accounting, variance analysis, and unit economics
• Familiarity with crypto or blockchain cost structures (on-chain fees, infrastructure, custody, vendors)
• Solid knowledge of IFRS or US GAAP
• Advanced Excel skills; experience with SQL and BI tools (Looker, Tableau, Power BI)
• Ability to work cross-functionally and translate complex cost drivers into clear insights
• Comfortable operating in fast-paced, ambiguous environments
• Strong ownership mindset with attention to detail and accuracy

Work at the forefront of crypto, payments, and fintech. At KAST, you’ll have high ownership, zero bureaucracy, and a direct impact on building the world’s first truly global stablecoin-first bank.

Join a no-BS, high-energy team solving complex problems in a fast-paced environment. Every role matters, and your work will shape how people move money, manage digital assets, and experience financial products worldwide.

We offer competitive compensation, meaningful equity, and opportunities to grow as the company scales. Our high-trust culture gives you autonomy, responsibility, and the chance to build something extraordinary from the ground up.

At this time, we receive a lot of applications, so please bear with us to hear back from us.

We hire through referrals, networks, and direct applications. Bring your skills, energy, and curiosity!

Send your resume or LinkedIn profile and a short note on why you want to join the ride to [email protected]

1. Screening Call with Recruiter
2. Interview with Hiring Manager
3. Case Study (optional)
4. Interview with final Stakeholder