Senior Full Stack Engineer

Unit21
San Francisco, CA

About the role:

We are looking for a Fullstack engineer who is passionate about system and service design and optimization with interest in developer experience and observability. We build products that help our customers catch fraud and keep their customers money safe. This requires detailed analysis of complex systems with innovative solutions and design.

The role will be hybrid remote (part in-office, part remote).

What you will be doing:

● Design and build high-performance Data Integration products with intuitive user interfaces prioritizing scalability, reliability and efficiency

● Collaborate with product and design to refine user experiences

● Work with distributed systems and data pipelines

● Lead and drive projects to completion

● Innovating on creative solutions to difficult problems

● Work with related data infrastructure technologies

What we’re looking for:

● BS, MS or Ph.D in Computer Science, Engineering, Mathematics, Statistics, Physics, or related field is required

● 5+ years of experience in Python or other Object-Oriented programming languages

● 3+ years of experience with React and Material UI

● 3+ years of experience in Relational Databases and/or working with Data Warehouses such as Snowflake, Databricks or Redshift

● Experience in AWS (cloud) and Terraform (IAAS)

● Cost vs performance analysis

● Experience in building and managing distributed systems

● Experience in developing and optimizing end-to-end APIs, data-flows, SQL queries and infrastructure for consumer or enterprise products

● Advanced knowledge of software engineering principles including software design, source control management, build processes, automated deployments, code reviews, testing methods

● Hustle, curiosity, humility

Bonus Points!

Experience managing large-scale critical production systems with minimum SLAs of 4 9's

Experience with Apache Spark

Compensation:

The standard base pay range for this role is $180,000 - $200,000 Annually. This base pay range does not include variable compensation including potential commissions, bonuses or other financial or equity incentives.

Unit21 is an equal opportunity employer, we encourage all to apply, even if you do not meet each requirement above. We are building a diverse, inclusive workforce and hope you will join us!

What we can offer you:

  • Competitive salary and pre-IPO stock options

  • 100% company-paid medical, dental and vision insurance (for employee)

  • Optional HSA and FSA medical reimbursement accounts

  • Unlimited paid time off

  • Generous leave programs for life events

  • 401(k)

  • Charity matching

  • Annual Learning & Development stipend

  • One-time Home office set-up stipend

  • Commuter benefits

  • Happy hours and team-building events

  • Great office space in the San Francisco Financial District

  • Fully stocked kitchen

  • Lunch provided in SF office multiple times a week

  • A great company culture with a strong emphasis on diversity, equity and inclusion

About Unit21:

Unit21 stops bad actors by leveraging data to deliver justice and safety in the world. We protect businesses against adversaries engaging in money laundering, fraud, and other sophisticated risks by offering no-code infrastructure to model, detect, and remediate suspicious activity. Our customers range from large Fortune 500 companies to high-potential, pre-launch startups. We have reported over USD $2 billion in fraud and laundered money to the US government using our software.

We are a rapidly growing Series C startup, having raised close to $100m from Google, Tiger Global, ICONIQ Capital, Jack Dorsey, Diane Greene, and other leading VCs. Our team believes deeply in fostering individual ownership, iterative product development, and empathetic communication. There are many challenging problems to solve in this industry, and a huge opportunity for our software to empower companies to define a new standard of eliminating bad behavior on their platforms.

Posted 2025-08-22

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