Kotlin Jobs in Web3

Join Ephemera, Build the Future of Onchain Messaging

We’re hiring a Staff Protocol Engineer, Partner Enablement—an experienced engineer with protocol-level fluency and a passion for helping high-profile integration projects and teams succeed.

You’ll work directly with integrators to help them build, debug, and ship exceptional messaging products using XMTP. You’ll delight in understanding how their apps work, diving into their code, and collaborating on solutions. And you’ll bring those insights back to the protocol and SDK teams, eager to help improve the core.

This is a high-trust, high-impact position for a deeply technical builder who finds joy in making other builders successful.

About the Role

As a staff engineer leading Partner Enablement, you’ll be the go-to technical partner for integrators building with XMTP—from scrappy and promising startups to leading web3 and consumer apps. You’ll debug production issues, help them improve their apps, and bring back insights that shape the XMTP protocol, SDKs, tools, and docs.

You’ll work side-by-side with top engineers (think: Coinbase, Farcaster) to help them solve any protocol, messaging, and cryptographic issues. You’ll help them go from “this is broken” to “this is the best messaging experience we’ve ever built.”

You'll bring deep technical expertise along with maturity, humility, and a genuine passion for helping developers succeed.

What You’ll Do

• Support high-impact developers building on XMTP by helping them debug and improve their apps.

• Dive into the XMTP codebase (libxmtp), SDKs, and integrations to provide trusted help and insights.

• Collaborate with integrators to co-solve problems and ship better features faster.

  • Ask thoughtful questions to truly understand developer needs and bring those insights back to the team.

  • Identify gaps in the protocol, SDKs, tooling, and docs—and work alongside internal teams to address them.

• Embody a culture of service leadership, accountability, and technical excellence.

What You Bring

• Solid engineering skills with the ability to understand a MLS-based messaging protocol and multiple SDKs (e.g., JavaScript, Swift, Kotlin).

• A track record of building high-quality software—and helping others do the same.

• Deep debugging and diagnostic skills across environments and platforms.

• Empathy, curiosity, and a strong desire to learn about what developers need.

• Experience working with or supporting technical teams—ideally at protocol, infra, or devtool companies.

Nice-to-Have’s:

• Familiarity with secure messaging systems (e.g., Signal, WhatsApp, Telegram).

• Contributions to open source protocols or developer platforms.

• Experience as a solutions engineer or in high-trust support roles for top-tier customers.

• Background as a techincal product manager

Why This Role Matters

At Ephemera, we steward the development and adoption of XMTP. The success of XMTP depends on the success and trust of the developers and apps who choose to use it.

We’re looking for someone who takes pride in what others create—because they were the trusted technical hand that helped make it possible.

If you’re an engineer who cares deeply about other engineers, and you believe private communication should be universally accessible and secure—we want to hear from you.

About You:

• You are passionate about decentralized technology and believe in an onchain future.

• You love to win and are fueled by solving hard problems.

• You are self-directed, see opportunities and are inspired by challenges and helping solve them.

• You have a small team mindset and are focused on where you can have the greatest impact.

• You love to learn, are not afraid of changing your opinion or being wrong.

Benefits:

• Generous and competitive compensation package.

• Salary range between $230-$265k base range (depending on experience + location).

• Remote-first environment with semi-yearly gatherings to connect IRL.

• Fully paid Medical, Dental, Vision insurance.

• Parental Leave.

• IT Equipment and WFH setup.

• Monthly Wellness and Life>

• Personal assistant.

• Unlimited Time Off