Requirements

• Strong software engineering and distributed systems fundamentals.
• Experience building and operating reliable, high-throughput, low-latency production services.
• Solid understanding of HTTP, APIs, payment protocols/rails, web security, or cryptographic authorization.
• Hands-on experience or deep interest in payment systems, usage metering, billing engines, digital wallets, or machine-to-machine interaction protocols.
• Ability to rapidly prototype, evaluate architectural trade-offs, and ship solutions in a fast-moving, emerging technical domain.
• Strong written and verbal communication skills.

Nice to Haves

• Fluency in Rust, especially async Rust, or TypeScript/JavaScript edge runtimes (e.g., Cloudflare Workers, Durable Objects, KV).
• Experience with emerging agentic payment protocols (x402, A2P, ACP, UCP, Web Bot Auth) or digital wallet architectures.
• Experience building high-precision event metering pipelines, usage-based billing engines, outcome verification systems, or revenue attribution tools.
• Experience with smart contract bridges, cryptography (public-key encryption, signatures, hashes), or hybrid fiat/crypto payment infrastructure.
• Open-source contributions to payment systems, agent protocols, web standards, or distributed systems projects.
• Proven track record of debugging and resolving performance, concurrency, or transactional correctness bottlenecks.

What You'll Be Doing

• Design and ship production-ready, low-latency services that make web resources payable for autonomous agents using emerging standards (x402, WBA, ACP, UCP).
• Build high-precision systems for usage metering, pricing definition, outcome verification, and value attribution tailored for agentic workflows.
• Develop secure protocols and capabilities for authenticating and authorizing buyers, sellers, and autonomous agents across host-agnostic endpoints.
• Create capabilities and APIs that provide businesses with granular visibility, telemetry, and control over agent-generated revenue, billing, and settlement.
• Build resilient bridges between mainstream fiat commerce rails, digital wallets, and decentralized/cryptographic payment protocols for Internet-scale micropayments.
• Write clean, secure, well-tested code while maintaining strict accounting and financial precision, advocating for high reliability, security, and low-latency performance.
• Collaborate with software engineers, researchers, product managers, design engineers, and stakeholders to take capabilities from concept to production.

Perks and Benefits

• Estimated annual salary between €54,000 - €75,000 for Portugal-based hires, adjusted depending on location.
• Final offer includes time exemption in alignment with applicable law and collective bargaining agreements.
• Eligibility to participate in Cloudflare’s equity plan.
• Opportunity to work in a mission-driven company focused on protecting and improving the free and open Internet.
• Hybrid work locations available in Lisbon or London.
• Inclusive and diverse workplace committed to equal employment opportunity for all.
• Reasonable accommodations provided for qualified individuals with disabilities during the application process.