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[Remote] Senior Software Engineer, Custody

Remote · United Kingdom Full-time

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.

Responsibilities

  • Design, develop, and maintain mission-critical custody systems across multiple blockchains
  • Collaborate with cross-functional teams including product, compliance, and infrastructure to define system architecture and technical requirements
  • Ensure the reliability, security, and scalability of our services through best practices in software design, testing, and deployment
  • Optimize existing issuance infrastructure to enhance performance, reduce latency, and improve operational efficiency
  • Provide mentorship and technical guidance to junior engineers, fostering a culture of continuous learning and improvement
  • Stay informed about emerging trends in blockchain, distributed systems, security, and financial technology to drive innovation within the team
  • Participate in code reviews, architectural discussions, and technical decision-making processes

Skills

  • 5+ years of software engineering experience, ideally in fast-paced, high-growth environments
  • Proficiency in at least one modern programming language
  • Solid foundation in computer science fundamentals, including data structures, algorithms, and distributed system design
  • Experience building and maintaining cloud-native services using tools such as Kubernetes, Docker, Kafka, and AWS
  • Strong debugging and problem-solving skills, especially in production environments
  • Excellent collaboration and communication abilities; able to work effectively with cross-functional teams
  • A passion for innovation and driving technical solutions to real-world problems
  • Golang or Java preferred; Kotlin, Rust, Python, or C++ also valued
  • Experience working on high-throughput, low-latency systems, trading infrastructure, cryptography, or custody platforms is a strong plus

Benefits

  • Offers Equity
  • Offers Bonus
  • 10% Annual Salary

Company Overview

  • Paxos 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 Sponsorship

  • Paxos 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.
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