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Finix

Senior Software Engineer

Chicago
Salary
USD 150,000 - 220,000 / per-year-salary
Level
Senior
Work type
On-site · Chicago

Not stated in the posting: visa.

Open. First seen 16 September 2026.

Apply on the company's site →

About the role

About Finix

Finix's standard text

Finix is building the global operating system for fintech, starting with payments. From startups to publicly traded companies, Finix processes tens of billions of dollars annually both in-store and online. Finix was founded in 2015 and is headquartered in San Francisco.

To date Finix has raised over $200M, including a $75M Series C led by Acrew Capital and Lightspeed Venture Partners and backed by American Express Ventures, Bain Capital Ventures, Homebrew, Inspired Capital, Visa, and others

About the role

The engineering team owns the delivery and stability of our product end to end. Since Finix serves as the complete payment platform of our customers’, our engineering team owns our customers’ ability to capture revenue. The Sr.

Software Engineer role centers around envisioning superior technical solutions to our customers’ payment needs, leading its implementation and continuously ensuring reliable service to our customers. You will have broad autonomy and responsibility for formulating the best solution possible and working with your peers to deliver your vision. Finix is looking for a team member to join our engineering team who brings exceptional technical acumen, attention to detail, interest to grow and an obsession with building excellent, performing and scalable software.

You will

  • Deep dive into our customers’ needs, and work with product management to define new services
  • Own the technical vision, implementation, best practices and infrastructure within your domain
  • Develop close relationships with product management and peer engineers
  • Become an expert in your payments domain and mentor junior software engineers
  • Proactively improve our architecture, frameworks, tooling, automation, and best practices

You are

  • Experienced in designing, implementing, and testing superior software
  • Comfortable continuously delivering code, infrastructure, tests and features to production
  • Excited about finding new and better ways to make software reliable, scale and perform
  • Obsessed with finding edge cases, understanding requirements and design implications
  • Proactive in monitoring running systems and troubleshooting production issues
  • Always looking for ways to grow, opportunities to mentor and collaborate with peers

You have

  • Have 4+ years of experience building and designing systems with several lifecycles
  • Extensive experience implementing secure APIs, highly available and observable services
  • Led and mentored more junior software engineers
  • Kept tight control on multiple competing priorities and have strong ability to multitask
  • Raised the bar on every project you were involved in

What this role asks for

89% of this description is written for the role. The rest is Finix's standard text, folded away below.

Compared with Finix's other open jobs.

The team: Core Engineering HIRES STEADILY

This role is one of 3 open in Core Engineering. 1 was posted in the last 30 days and the oldest in August: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

AWS (1 of 3), CI/CD (1 of 3), CrowdStrike (1 of 3), IAM (1 of 3), Java (1 of 3), Okta (1 of 3), Penetration Testing (1 of 3)

OTHER ROLES ON THIS TEAM

From the team and dates on Finix's own job board.

Salary context

322 other open postings titled Senior Software Engineer state a salary: median USD 160,000 to USD 220,000 a year.

See Software Engineer salaries in the United States →

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