About the role

Senior Back-End Software Engineer maintaining and modernizing Rails stack for Circle's platform. Building internal tools and optimizing for performance and scalability in a fully remote, international team.

Responsibilities

Maintain and modernize our Rails stack, including dependency upgrades, performance optimization and security enhancement
Build internal tools, SDKs, and libraries to improve developer experience and infrastructure scalability
Partner with your front-end counter-parts and SREs to support observability, performance, and reliability initiatives
Identify opportunities to build in-house systems that reduce reliance on costly third-party services
Contribute to architectural decisions that improve the performance, security and cost-efficiency of our platform

Strong alignment with our values (find our values on our career page if you haven’t read up on them yet)
You are proficient in English (spoken, written, and reading) at a CEFR Level C2 / ILR Level 5
Deep expertise with Ruby on Rails, with an emphasis on infrastructure and architectural improvements
Solid experience working with MySQL and/or Postgres
A strong track record of improving performance, scalability, and system reliability
5+ years of experience in a back-end engineering role, ideally focused on infrastructure or platform systems
Comfortable working autonomously in a fast-paced, fully remote environment.

Fully remote: work from anywhere in the world!
Autonomy and trust to do your job: we care about outcomes over everything else.
Paid time away: all employees are given 35 days of PTO annually. We also offer a paid sabbatical after 5 years.
Generous U.S. benchmarked compensation and startup equity no matter where you are in the world.*
Awesome medical coverage with 100% coverage for you and your family, or medical reimbursement options where applicable!*
Parental leave for parents expanding their family, or just starting one.
Home office stipend to help you get up and running.
Learning & development stipend to help you level up your professional skills.
Annual bonus potential for roles that don't already receive variable income or commission.
Company retreats: Twice a year, the Circle team gets together for a fully paid company retreat in incredible places around the world! We’ve had past retreats in Colombia, Portugal, and Mexico, with more planned on the horizon.