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Join Worldcoin as a Software Engineer to build foundational services for a crypto platform, ensuring reliable transaction execution and collaborating with cross-functional teams.
About the Company: Tools for Humanity (TFH) designs and builds technology behind World. World is building a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy. The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities, and more, in people’s hands. Together, they add a human layer to an AI-driven internet. World is already running at a global scale. More than 17 million people across 160 countries have verified with World ID, and more new Orb verifications take place each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate. Founded in 2019, TFH has more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI. TFH and World have been featured on the cover of [TIME Magazine](https://time.com/7288387/sam-altman-orb-tools-for-humanity/), highlighted in [Fast Company’s](https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025) Next 5 in Fintech, and explored in a [Bloomberg deep dive](https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse). [The New York Times](https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html), [Bankless](https://www.youtube.com/watch?v=KUcjtFOHgNc) and [TechCrunch](https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/) have all recognized our collective progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the [Time AI 100](https://time.com/collections/time100-ai-2025/). Learn more about the newest product launches from our [Liftoff](https://world.org/liftoff) event.
- Write clean, efficient, and maintainable code in Go, Rust, and TypeScript.
- Design and implement highly reliable services for transaction execution, state access, calldata construction, smart contract interaction, and event ingestion.
- Build and extend secure indexing and data processing pipelines using Temporal as the orchestration layer.
- Develop and maintain smart contracts required by product workflows.
- Improve the resilience of blockchain reads and writes through RPC load balancing, failover strategies, multiprovider redundancy, and transaction simulation.
- Own features from design through deployment, including technical design, documentation, testing, observability, and operational readiness.
- Partner with product engineering, protocol, infrastructure, and security teams to deliver scalable, fault-tolerant onchain systems.
- Contribute to monitoring, alerting, incident response, and long-term maintenance of production services.
- Help define platform abstractions that make it safer and easier for product teams to build onchain experiences.
- Experience building production backend systems in Go, Rust, or TypeScript.
- Experience with distributed systems, reliability engineering, or high-throughput backend services.
- Familiarity with Ethereum, EVM-based chains, smart contracts, account abstraction, or ERC-4337.
- Experience with event-driven systems, indexing pipelines, or workflow orchestration tools such as Temporal.
- Strong debugging skills across service boundaries, external providers, and blockchain infrastructure.
- A pragmatic approach to security, correctness, and operational excellence.
- Salary range: $191,000 - $225,000, plus a competitive long term incentive package.
- Comprehensive employee benefits including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!