Jobs in Marbella, Spain

Stablecoins and blockchains are upgrading the world’s financial system — and Crossmint lets companies harness their power with ease.

Crossmint is a one-stop-shop developer platform for building modern financial applications, from the next generation of fintechs to applications that leverage AI agent–driven commerce.

With just a few lines of code, developers can integrate programmable wallets, stablecoin payments, tokenization, on / off ramps, compliance, and agentic commerce tools — all from a single vendor, without the need for a large team of blockchain engineers.

From companies like MoneyGram and Visa to entire nation states, our more than 40,000 clients use Crossmint to launch new financial products, tokenize assets, and build applications for agentic commerce — all on fully managed infrastructure across 50+ chains.

If you want to help build the backbone of programmable finance and agentic systems, we’d love to work with you!

Location

New York City or Miami. We are also open to candidates based anywhere in Spain, provided they are able to work in alignment with EST business hours.

Type of employment

Full-time

About The Role

As a Customer Success Engineer, you\'ll bring technical empathy to every customer engagement: Guiding users from integration to scaling across Crossmint’s platform. You’ll collaborate with Fortune 500 clients, AI agent builders, and fast-moving startups to drive success by ensuring seamless onboarding, troubleshooting, and long-term adoption. What you’ll do:

• Lead technical onboarding: Help customers integrate Crossmint Wallets, Tokenization, and Checkout modules quickly and reliably.
• Deliver high-quality support and escalation: Debug complex issues across APIs, wallets, observability tools, and blockchain layers.
• Create / optimize developer resources: Self‑service guides, docs, sample code, SDK demos, and technical walkthroughs.
• Collect and relay feedback: Channel customer insights to Product & Engineering teams to shape roadmap and fix high-impact issues.
• Drive automation & tooling improvements: Build scripts, Zapier workflows, or AI copilot shortcuts to streamline support workflows and lift customer experience.
• Become a cross‑chain expert: From gasless, fiat‑funded wallets to ERC‑721 / SFT minting, subscriptions (ERC‑5643), and secure MPC vaults.
• Support enterprise-level launches: Deliver white-glove support, SLA‑backed availability, and expert escalation across priority accounts and time zones.

About You

You’re a developer turned support champion, who enjoys solving real-world technical challenges and building trust with users:

• 4+ years in technical or solutions engineering, Developer Support, or Customer Success Engineering.
• Experience deploying smart contracts in Solidity (for example, NFT / tokenization standards like ERC‑721, ERC‑1155).
• Prior work integrating enterprise developer platforms or fintech / crypto infrastructure.
• Familiar with TypeScript or Python, and React. Capable of reading / driving backend logic, SDK integrations and frontend.
• Familiar with REST API development, authentication, webhooks, observability (logs, Datadog), and error analysis.
• Clear and empathetic communication in English, both written and verbally.
• Adaptable and autonomous, comfortable in fast-evolving environments.
• Eagerness to grow familiarity with crypto infrastructure, wallet standards, tokenization, and agentic commerce.

Bonus Points

• Understanding and passion for the broader web3 ecosystem. Hands on experience on building personal web3 projects, contributed to web3 open-source projects, or tested agentic commerce frameworks.
• Working knowledge of automation tools (Zapier, scripting, AI copilots) to boost support efficiency.

Please keep in mind: This is the full list of everything we’re looking for. You don’t need to check every single box to be a strong candidate, and having a good number of these would already indicate a solid fit for the role.

Benefits

• Highly competitive location-based compensation.
• Stock options program.
• Unlimited, flexible PTO.
• Flexible work schedule.
• Company laptop and allowance for any necessary home equipment.
• Daily stipend for commuting to the office.
• Company-paid trips for annual off-sites and onsites.
• Insurance covered by Crossmint.
• 401(k) Plan (US only).

Our Principles

• Results and delivery: Ship high quality work fast.
• Build for the long term: Build scalable, secure, and reliable solutions. Use AI.
• Extreme Ownership: Be an effective Directly Responsible Individual (DRI). Be proactive.
• Be a team player: Be an effective and kind colleague providing credible challenge. Be present and reliable.

Please note that Crossmint never conducts AI-based interviews, and all of our processes include an initial video call with a team member. Crossmint will not request your personal identification documents or any payment at any point during your interview process. Please stay vigilant about potential fraud. If you receive an email that claims to be from Crossmint but ends with any domain other than @crossmint.com, @crossmint.io or @paella.dev, it is not from us. We own these three domains listed before, and they are the only legitimate ones.

Please let our Talent Team know if you need any assistance completing any forms, or participating in the process.

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