[Remote] Senior Software Engineer, Custody

Note: The job is a remote job and is open to candidates in USA. Paxos is on a mission to open the world’s financial system to everyone by enabling the instant movement of any asset in a trustworthy way. As a Senior Engineer on the Custody team, you will play a key role in architecting, building, and maintaining Paxos’ crypto custody infrastructure and applications.ResponsibilitiesDesign, develop, and maintain mission-critical custody systems across multiple blockchainsCollaborate with cross-functional teams including product, compliance, and infrastructure to define system architecture and technical requirementsEnsure the reliability, security, and scalability of our services through best practices in software design, testing, and deploymentOptimize existing issuance infrastructure to enhance performance, reduce latency, and improve operational efficiencyProvide mentorship and technical guidance to junior engineers, fostering a culture of continuous learning and improvementStay informed about emerging trends in blockchain, distributed systems, security, and financial technology to drive innovation within the teamParticipate in code reviews, architectural discussions, and technical decision-making processesSkills5+ years of software engineering experience, ideally in fast-paced, high-growth environmentsProficiency in at least one modern programming languageSolid foundation in computer science fundamentals, including data structures, algorithms, and distributed system designExperience building and maintaining cloud-native services using tools such as Kubernetes, Docker, Kafka, and AWSStrong debugging and problem-solving skills, especially in production environmentsExcellent collaboration and communication abilities; able to work effectively with cross-functional teamsA passion for innovation and driving technical solutions to real-world problemsGolang or Java preferred; Kotlin, Rust, Python, or C++ also valuedExperience working on high-throughput, low-latency systems, trading infrastructure, cryptography, or custody platforms is a strong plusBenefitsOffers EquityOffers Bonus10% Annual SalaryCompany OverviewPaxos is a regulated financial institution building infrastructure to enable movement between physical and digital assets. It was founded in 2012, and is headquartered in New York, New York, USA, with a workforce of 201-500 employees. Its website is https://www.paxos.com.Company H1B SponsorshipPaxos has a track record of offering H1B sponsorships, with 3 in 2026, 7 in 2025, 1 in 2024, 12 in 2023, 6 in 2022, 14 in 2021, 2 in 2020. Please note that this does not guarantee sponsorship for this specific role.