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Sr. Backend Engineer

USAFull-Time$157K - $205K
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About the role:

We’re looking for a Senior Backend Engineer to join our team at Unit21. We process a high volume of data (up to a billion records/day) formed in unique patterns for each customer that need to be accessed and analyzed in a performant manner. The key problems we face on a day-to-day basis are performance, reliability, and flexibility at scale, and the ideal candidate will have experience with discovering and implementing practical, innovative solutions.

As a core contributor on our Data Ingestion & Management (DIM) team, you’ll have the mission of ensuring we maintain minimal distance from customer’s data schema to ours, make data ingestion & mapping simple, enriching the quality of our data for detection modeling and fraud investigation, and ensuring it all happens in an efficient manner. This is a data platform team, and the work empowers and impacts every other EPD team.

Recent projects have run along the lines of:

  • Researching ways to enrich IP Address data to fuel risk assessment
  • Analyzing Spark jobs & data schema to identify easy efficiency gains or cost reduction
  • Ingesting compromised data from the dark web and exploring ways to match against our customer’s users

Our engineering team is low process and high autonomy - we emphasize product decision-making and prioritization by folks who own the work. As a result, you’ll be expected to get familiar with how the product works, get into the mindset of the customer, and influence the decisions made regarding what you build. Additionally, you’ll have a significant say in what you work on, and will be expected to prioritize the most meaningful work for the company. Members of our engineering org are curious, humble, and focused on execution; if you embody these qualities and want to be surrounded by like-minded people, this is the place for you.

What you’ll be doing:

  • Implement customer facing ingestion-focused features in the Unit21 backend system, working with RESTful APIs and databases
  • Work with other engineers to design scalable systems and services from the ground up with well-defined interfaces
  • When on-call, monitor production system, react to and resolve incidents
  • Review other engineers’ code and provide feedback
  • Communicate with product managers, sometimes customers to clarify requirements and provide solutions

What we’re looking for:

  • 4+ Years of experience in one or more object-oriented languages, such as Python, Java, Scala, C#, etc.
  • Experience in developing and owning end-to-end APIs, data-flows, and infrastructure for consumer or enterprise products
  • Proficiency in one or more RDBMS, such as PostgreSQL, MySQL, MSSQL, etc.
  • Familiarity with one or more NoSQL databases, such as MongoDB, Neo4j, Elasticsearch, Cassandra, etc
  • Proficiency with data modeling and performant data access strategies
  • Proficiency with API design and optimization
  • Experience in rotational on call schedule to support P0 issues
  • Hustle, curiosity, humility

Bonus Points:

  • Professional experience with some or all of our stack: PostgreSQL, Python, Elasticsearch, Delta Lake, AWS, Terraform, React
  • Experience with making product decisions
  • Experience with autonomous, self-directed work
  • Strong communication skills
  • Bachelor’s/Master’s degree in Computer Science or related fields


The standard base pay range for this role is $157,00.00 - $205,000.00 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 and dinner provided in SF office at least 3x per 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.

We encourage people of all backgrounds to apply. Unit21 is committed to creating an inclusive culture, and we celebrate diversity of all kinds.


$157,000 - $205,000 per year

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