Senior Software Engineer

Circle; Washington (District of Columbia); On-site; USD 147,000 - 195,000; Full time

Job summary

An innovative financial technology company is seeking a Senior Software Engineer to elevate developer experiences across web2 and web3 ecosystems. In this pivotal role, you'll lead the development of intuitive SDKs and APIs, ensuring they are user-friendly and well-documented. Your expertise in TypeScript and Python will be crucial as you collaborate with product and design teams to simplify the developer journey. Join a dynamic team committed to transparency and excellence, where your contributions will significantly impact the future of finance and technology.

Qualifications

• 5+ years of software engineering experience with a focus on SDKs and APIs.
• Strong background in TypeScript, NodeJS, and Python development.

Responsibilities

• Design and implement developer SDKs and tooling for web2 and web3 ecosystems.
• Collaborate with cross-functional teams to enhance developer experience.

Skills

TypeScript

NodeJS

Python

SDK Development

API Development

Communication Skills

Clean Code Practices

Collaboration

Tools

Slack

Apple MacOS

GSuite

Job description

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Circle is a financial technology company at the epicenter of the emerging internet of money, where value can finally travel like other digital data — globally, nearly instantly and less expensively than legacy settlement systems. This ground-breaking new internet layer opens up previously unimaginable possibilities for payments, commerce and markets that can help raise global economic prosperity and enhance inclusion. Our infrastructure – including USDC, a blockchain-based dollar – helps businesses, institutions and developers harness these breakthroughs and capitalize on this major turning point in the evolution of money and technology.

What You’ll Be Part Of

Circle is committed to visibility and stability in everything we do. As we grow as an organization, we're expanding into some of the world's strongest jurisdictions. Speed and efficiency are motivators for our success and our employees live by our company values: High Integrity, Future Forward, Multistakeholder, Mindful, and Driven by Excellence. We have built a flexible and diverse work environment where new ideas are encouraged and everyone is a stakeholder.

What you’ll be responsible for

As a Senior Software Engineer at Circle, you’ll play a key role in elevating the developer experience across web2 and web3 ecosystems. You’ll lead the development of intuitive SDKs, developer tooling, and sample applications, as well as backend services that support external and internal developer audiences. Working closely with technical leads, cross-functional partners, and product teams, you will impact architectural decisions, refine engineering standards, and promote effective methods throughout the team. You’ll contribute to existing systems, shape new products before launch, and assess developer experiences with a critical lens—balancing deep web3 expertise with appreciation for web2 developers. Through mentorship, code reviews, and hands-on contributions, you’ll help ensure Circle delivers high-impact, developer-friendly solutions at scale.

What you’ll work on

• Design and implement SDKs, APIs, and developer tooling that are easy to use, performant, and well-documented
• Build and maintain customer-facing and internal applications that support developer workflows
• Collaborate with product and design teams to deliver tools that simplify the developer journey
• Proactively evaluate and improve the developer experience of new and upcoming products
• Participate in architectural decisions, technical planning, and design reviews
• Mentor junior engineers and contribute to team-wide engineering standard processes
  
  

What you’ll bring to Circle

• 5+ years of software engineering experience, including expertise in TypeScript/NodeJS and Python
• Strong background in building SDKs, APIs, and developer-facing tools
• Proven ability to craft and maintain scalable, production-ready software
• Experience collaborating cross-functionally with product and design teams
• Excellent written and verbal communication skills in a remote-first environments
• Dedication to clean, well-tested code and continuous delivery practices
• Experience/familiarity with Slack, Apple MacOS and GSuite
• Familiarity with generative AI models (ChatGPT, Gemini, etc.) and crafting effective prompts
  
  

Preferred Requirements

• Experience developing in or integrating with web3 technologies and protocols
• Ability to evaluate developer tools from both web2 and web3 perspectives
• Interest or experience applying modern AI/ML techniques in product development
  
  

Additional Information

• This position is eligible for day-one PERM sponsorship for qualified candidates.
  
  

Circle is on a mission to create an inclusive financial future, with transparency at our core. We consider a wide variety of elements when crafting our compensation ranges and total compensation packages.

Starting pay is determined by various factors, including but not limited to: relevant experience, skill set, qualifications, and other business and organizational needs. Please note that compensation ranges may differ for candidates in other locations.

Base Pay Range

$147,500 - $195,000

We are an equal opportunity employer and value diversity at Circle. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Additionally, Circle participates in the E-Verify Program in certain locations, as required by law.

Should you require accommodations or assistance in our interview process because of a disability, please reach out to [e-mail] for support. We respect your privacy and will connect with you separately from our interview process to accommodate your needs.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

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