SentiLink stops more than 150,000 fraud attempts and verifies more than 3 million identities every day to protect both institutions and consumers. The problems we work on are challenging, and solving them takes deep domain expertise, rigorous analysis, and a willingness to dig into the details.
At SentiLink, you'll work alongside smart, highly collaborative colleagues who respect each other's time and judgment, take ownership, and follow through on their commitments. Together, we do truly meaningful work protecting the identities of innocent consumers and flagging the fraudsters attempting to exploit them.
We're well capitalized and growing quickly. We already serve 13 of the top 15 U.S. banks, we're expanding into new markets, and we're backed by Craft Ventures, Andreessen Horowitz, NYCA, and Max Levchin. We've been named to the Forbes Fintech 50 and as a 2026 FICO Industry Vanguard Decision Award Winner. We were also the first company to go live with the electronic Consent Based Social Security Number Verification (eCBSV) service, and we've testified before the U.S. Congress on the future of identity.
We want SentiLink to be the best place you've ever worked. We offer generous benefits and support a range of working arrangements, from fully remote to in-office. We are a digital-first company with strong collaboration across the U.S. and India, and we meet in person regularly to build relationships. We have offices in Austin, San Francisco, New York City, Seattle (Bellevue), Los Angeles, and Chicago in the U.S., and in Gurugram (Delhi) and Bengaluru in India.
Role:The Engineering team builds the systems and products that power SentiLink’s fraud detection capabilities. For this role, you’ll work closely with the NOVA squad across Product, Engineering, Data Science, Fraud Intelligence, and Sales to bring mobile device intelligence into SentiLink’s products and deepen our understanding of the mobile device landscape.
We’re looking for a Founding Mobile Developer with deep systems-level expertise across both iOS and Android. You will own the technical approach and implementation of mobile SDKs and help establish SentiLink’s mobile engineering capabilities. Success in this role means independently navigating ambiguous technical problems, understanding how mobile platforms behave below the application layer, and building reliable mobile capabilities that strengthen our products and fraud detection models.
Over time, your work may also help enable a mobile-optimized experience for SentiLink’s dashboard.
This is a remote, US-based role.
Own the design and implementation of SentiLink’s mobile SDKs across native iOS and Android.
Develop a deep technical understanding of device behavior and the signals and capabilities available across both mobile platforms, including networking and other system-level functionality.
Evaluate technical approaches and make decisions that balance reliability, platform constraints, performance, and maintainability.
Partner with Product and Engineering to define and deliver mobile capabilities for NOVA.
Collaborate with Data Science to make relevant mobile device signals and capabilities available for fraud detection models.
Investigate ambiguous mobile engineering problems independently, using rigorous analysis and experimentation to determine the right technical approach.
Contribute mobile expertise and technical direction as SentiLink evaluates longer-term opportunities for mobile products and experiences.
5+ years of professional software engineering experience, with extensive experience developing for both native iOS and native Android.
Deep systems-level understanding of both iOS and Android, including areas such as networking, device APIs, operating system behavior, and platform internals.
Demonstrated ability to build technically complex mobile software with an emphasis on systems-level engineering rather than primarily user interface development.
Strong ability to independently explore and solve ambiguous technical problems with a high degree of ownership and autonomy.
Excellent analytical, problem-solving, communication, and interpersonal skills.
Experience building mobile SDKs, libraries, or other reusable mobile infrastructure preferred.
Experience partnering with data scientists to provide signals or capabilities used in machine learning models preferred.
$210,000 - $240,000/year + equity + benefits.
Employer paid group health insurance for you and your dependents
401(k) plan with employer match (or equivalent for non US-based roles)
Flexible paid time off
Regular company-wide in-person events
Home office stipend, and more!
Follow Through
Deep Understanding
Whatever It Takes
Do Something Smart
Skills Required
- 5+ years of professional software engineering experience
- Extensive experience developing for both native iOS and native Android
- Deep systems-level understanding of iOS and Android, including networking, device APIs, operating system behavior, and platform internals
- Experience building technically complex mobile software focused on systems-level engineering rather than primarily user interface development
- Ability to independently explore and solve ambiguous technical problems with ownership and autonomy
- Excellent analytical, problem-solving, communication, and interpersonal skills
- Experience building mobile SDKs, libraries, or reusable mobile infrastructure
- Experience partnering with data scientists to provide signals or capabilities used in machine learning models
What We Do
SentiLink is the leading fraud intelligence company, providing financial institutions and fintechs with purpose-built solutions for identity verification and fraud prevention. Our products detect synthetic fraud, identity theft, and hard-to-detect first-party fraud in real time — helping partners stop losses before they happen while approving more legitimate customers. Founded in 2017 by Naftali Harris and Max Blumenfeld, creators of the risk and fraud systems at Affirm, SentiLink was built on a simple premise: to truly stop fraud, you have to deeply understand it. That belief shapes everything, from the expert human intelligence that feeds our models to the way we work with our partners. We don't call them clients or customers, we call them partners, because that's genuinely how we think of them. Today, SentiLink processes 3M+ identity verifications per day for 500+ financial institutions, including 13 of the top 15 U.S. banks and 50+ fintech unicorns. We've raised $85M from investors including Andreessen Horowitz, Craft Ventures, and NYCA Partners.
Why Work With Us
At SentiLink, deep understanding isn't just a value, it's a company-wide expectation. For example, our Revenue Accounting Manager can walk you through SSN windows. That's not an exception; that's the norm. You'll collaborate closely, move fast, and do work that genuinely matters.
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SentiLink Offices
Remote Workspace
Employees work remotely.
SentiLink supports a variety of ways to work, ranging from fully remote to in-office. We have offices in multiple cities and if you’re located near one of these offices, we would love for you to spend time in the office regularly.
