Senior Software Engineer

Finix; San Francisco (CA); On-site; USD 150,000 - 220,000; Full time

Benefits offered by this job

Equity

Benefits

Job summary

Finix, based in San Francisco, is searching for an experienced Senior Software Engineer to lead the development of innovative payment solutions. The chosen candidate will be responsible for defining service requirements, implementing technical solutions, and mentoring junior engineers. Candidates should have over 4 years of experience and a passion for building scalable software. The role offers a competitive salary range of $150,000 to $220,000 annually, along with equity and benefits.

Qualifications

• 4+ years of experience building and designing systems.
• Extensive experience implementing secure APIs and reliable services.
• Experience mentoring junior engineers.

Responsibilities

• Define new services based on customer needs.
• Own technical vision and implementation within domain.
• Mentor junior software engineers in best practices.

Skills

Software design

API implementation

Mentoring

Problem-solving

Multitasking

Job description

About Us

Move money. Make money. Finix is a full-stack acquirer processor, empowering businesses of all sizes with flexible, modern payment solutions. Processing billions of dollars annually, Finix enables SaaS, marketplace, and e-commerce platforms to accept payments, manage payouts, and onboard merchants seamlessly. With our no-code, low-code, and developer-friendly tools, businesses can get up and running in hours—not months.

Finix has raised over $175M, including a $75M Series C led by Acrew Capital, with participation from Lightspeed Venture Partners, Leap Global, American Express Ventures, Bain Capital Ventures, Homebrew, Inspired Capital, Sequoia 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

$150,000 - $220,000 a year

Finix is an equal opportunity employer and values diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or any other protected class.

Role: Software Engineer III/IV
Level: IC3-IC4
Location: San Francisco, CA
Base Salary Range: $150,000/yr to $220,000/yr + equity + benefits
Must be authorized to work in the U.S.; no visa sponsorship provided.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.