Circle Verified

FinTech, Blockchain, Cryptocurrency, Financial Services

Senior Full-Stack Software Engineer, Discover

RemoteRemoteFull TimeSenior$130,000–$140,000 /yrPosted 2 months agoVisa sponsorship available

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Required skills

full-stack engineer
complex web applications
significant scale
100k+ rpm
100GB+ databases
Next.js
ReactJS
TypeScript
Tailwind
Ruby on Rails

Nice to have

creator-platforms
social content
video feeds
marketplaces
A/B testing
experimentation

Role summary

Circle is seeking a Senior Full-Stack Software Engineer to join the Discover team, focusing on building and expanding Circle Discover, a marketplace for digital experiences. The role involves developing features for user exploration, discovery, and purchasing, including algorithmic recommendations and content feeds. Responsibilities include building frontend and backend components using Next.js, ReactJS, TypeScript, and Ruby on Rails, working on data pipelines for search and recommendations, and improving code quality and architecture. The ideal candidate has 5+ years of experience with complex, large-scale web applications, strong proficiency in frontend technologies, and experience in a fast-paced, remote environment. Preferred experience includes A/B testing, creator platforms, and personalization at scale.

About Us

Circle is building the world’s leading all-in-one platform for online digital businesses. We make it possible for creators, coaches, educators, and businesses to bring together their audience with engaging discussions, live streams, events, chat, courses, and payments — all in one place, all under their own brand.

We’re proud to be a fully remote company of around 275 (and growing!) team members from 30+ countries around the world. We seek exceptional individuals around the world, set them up to do the best work of their lives, and in turn, create a meaningful impact in their own lives. We don't track hours, but we do manage for high expectations very closely. We collaborate across time zones, are highly async.

Twice a year, we bring the whole company together in beautiful places around the world for our company offsites. So far, we’ve hosted offsites in Turkey, Portugal, Mexico, Thailand, Colombia, Italy, Ireland, and more, with still more to come!

Check out our Careers page for more about working at Circle.

About the role

We’re looking for a seasoned full-stack engineer to help evolve and expand Circle Discover - Circle’s curated marketplace for finding and buying digital experiences (communities, courses, memberships, and eventually more).

As a part of the Discover team, you’ll build the product surface area that helps members explore, discover, and join digital experiences - including algorithmic recommendations, rich listings, engaging content feeds and seamless purchasing flows. We’re looking for someone who’s excited to shape how people find value in community and cares deeply about creating intuitive, performant, and elegant user experiences at scale.

What you'll be doing

- Build polished, high-converting purchasing experiences that help members discover digital experiences and businesses sell digital memberships, courses, and content at scale.

Run A/B tests and experiments to validate changes that boost user acquisition, retention, and conversion behavior.

Implement and improve features in the Discover Next.js frontend application together with API endpoints in our Rails backend.

Work on data pipelines and services driving search and recommendations.

Proactively improve the quality of our codebase, processes and architecture.

Work closely with Circle's leaders throughout the feature design process.

Work closely with our designers to create a world-class user experience.

Foster a bias for action, prioritizing speed of iteration without compromising on the quality of code or user experience.

What you'll need to be successful

5+ years experience working as a full-stack engineer on complex web applications with significant scale (100k+ rpm, 100GB+ databases).

Strong proficiency in Next.js, ReactJS, TypeScript, Tailwind, Ruby on Rails and MySQL/Postgresql. Familiarity with both frontend and backend is necessary, but a high degree of proficiency in frontend is required.

A desire to work in an environment which values speed of iteration and individual autonomy, while also embracing personal accountability and the ability to collaborate effectively as part of a dynamic team.

Comfortable in a fast-paced environment with a certain level of ambiguity, especially when learning and picking up new technologies when projects require it.

Great communication skills both in writing and verbal/oral (English).

Experience working on a fully distributed remote team.

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.

Bonus points

Previous experience working with creator-platforms, social content and video feeds, or marketplaces.

Experience with A/B testing and experimentation to optimize user experience, performance and conversion within consumer-facing applications.

Previous exposure to search, recommendation and personalization at scale.

Production experience with Next.js and hybrid React/Next.js systems for high-traffic applications

$130,000 - $140,000 USD per year

Circle offers U.S.-benchmarked compensation globally, equity in the company with ongoing refresh grants, and 35 days of paid time off each year.

We’re a remote-only team that comes together twice a year for company retreats in incredible destinations around the world. Alongside incredible flexibility and autonomy, we offer a benefits package that supports health, wellbeing, and professional growth. Learn more in our Candidate Hub.

Learn more

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Equal Employment Opportunity

Visit our Candidate Hub to learn more about working at Circle, our benefits, and our hiring process.

Sample Circle interview questions

1
Design a Vehicle Renting System
system designmedium
2
Design a system for storing and serving images/videos.
system designmedium
3
Design an airline reservation system
system designmedium
4
Merge a New Interval Merge a new interval into a list of non-overlapping intervals. Input: intervals = [[1,2],[3,5],[6,7],[8,10],[12,16]], newInterval = [4,8] Output: [[1,2],[3,10],[12,16]] Explanation: The new interval overlaps with [3,5], [6,7], and [8,10], merging them all into the unified block [3,10].
codingmedium

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