Senior Software Engineer (Chainlink Runtime) in London

About Chainlink

Chainlink is the industry-standard oracle platform bringing the capital markets onchain and powering the majority of decentralized finance (DeFi). The Chainlink stack provides the essential data, interoperability, compliance, and privacy standards needed to power advanced blockchain use cases for institutional tokenized assets, lending, payments, stablecoins, and more. Since inventing decentralized oracle networks, Chainlink has enabled tens of trillions in transaction value and now secures the vast majority of DeFi. Many of the world’s largest financial services institutions have also adopted Chainlink’s standards and infrastructure, including Swift, Euroclear, Mastercard, Fidelity International, UBS, S&P Dow Jones Indices, FTSE Russell, WisdomTree, ANZ, and top protocols such as Aave, Lido, GMX and many others. Chainlink leverages a novel fee model where offchain and onchain revenue from enterprise adoption is converted to LINK tokens and stored in a strategic Chainlink Reserve. Learn more at chain.link.

About the role

The Senior Software Engineer will play a critical role in advancing the reliability, scalability, and operational excellence of the Chainlink Runtime Environment (CRE) platform. Working on foundational platform capabilities, this role will design and build distributed systems that enable resilient workflow execution while supporting the continued growth of one of Chainlink's flagship products.

Your Impact

• Design, build, and operate highly scalable platform services that improve the reliability and performance of the CRE platform.
• Lead the development of production‑grade backend services and APIs that support multiple internal stakeholders and platform consumers.
• Drive architectural improvements that enable both vertical and horizontal platform scaling.
• Improve workflow execution durability and platform resilience through thoughtful engineering, rigorous testing, and operational excellence.
• Partner with engineering teams across the organization to deliver cross‑functional platform initiatives from architectural design through production deployment.
• Strengthen platform ownership by reducing operational silos, improving documentation, and increasing shared knowledge across the engineering organization.
• Contribute to improving platform reliability through engineering practices aligned with service reliability objectives and measurable operational outcomes.

Required Skills

• Experience designing, building, and operating large‑scale production platforms.
• Advanced proficiency developing production systems in Go (Golang).
• Experience building production APIs and backend applications serving multiple stakeholders.
• Strong experience designing and operating distributed systems.
• Demonstrated ability to deliver reliable, high‑quality software through rigorous engineering practices.
• Strong systems thinking with the ability to evaluate architectural trade‑offs and solve complex technical problems.
• Self‑driven approach with a high degree of ownership, technical curiosity, and continuous learning.
• Excellent collaboration and communication skills within cross‑functional engineering environments.

Preferred Skills

• Experience defining, measuring, and improving service reliability through SLOs and SLIs.
• Experience developing software using TypeScript, Solidity, or additional backend technologies.
• Strong interest in blockchain infrastructure and Web3 technologies.
• Experience building decentralized applications (dApps).
• Experience developing financial infrastructure, banking systems, or other mission‑critical distributed platforms.

All roles with Chainlink Labs are global and remote‑based. Unless otherwise stated, we ask that you try to overlap some working hours with Eastern Standard Time (EST). We carefully review all applications and aim to provide a response to every candidate within two weeks after the job posting closes. The closing date is listed on the job advert, so we encourage you to take the time to thoughtfully prepare your application. We want to fully consider your experience and skills, and you will hear from us regarding the status of your application shortly after the closing date.

Commitment to Equal Opportunity

Chainlink Labs is an equal opportunity employer. All qualified applicants will receive equal consideration for employment in compliance with applicable laws, regulations, or ordinances. If you need assistance or accommodation due to a disability or special need when applying for a role or in our recruitment process, please contact us via this form.

Global Data Privacy Notice for Job Candidates and Applicants

Information collected and processed as part of your Chainlink Labs Careers profile, and any job applications you choose to submit, is subject to our Recruiting Privacy Policy. By submitting your application, you are agreeing to our use and processing of your data as required.