Senior iOS Engineer

Company: UnifyID
Location: Redwood City
Posted on: April 1, 2026

Job Description:

About Prove (acquired UnifyID) Prove is the modern platform for continuous identity authentication and is used by over 1,000 enterprises and 500 financial institutions, including 9 of the top 10 U.S. banks. Prove’s cloud solutions, and mobile intelligence-driven APIs can be easily orchestrated to increase Approve Rates to over 90%, enabling companies to authenticate customer identities accurately, effortlessly, and privately while mitigating fraud. Prove’s solutions are available in 195 countries. For the latest updates from Prove, follow us on LinkedIn. Position Summary As a Senior iOS Engineer, you will be joining the recently acquired UnifyID team at Prove. This team is building the next generation of user authentication that combines behavioral biometrics from smartphone sensor data, machine learning modeling, and enterprise-grade cloud services. The result is an accurate, frictionless, and secure authentication service that defends against malicious attacks on mobile and web experiences. You’ll be part of a highly effective engineering team with a collaborative get-stuff-done culture. We embrace our startup roots and are willing to wear whatever hat is necessary to make our team and products successful. In this role, you will work closely with our product, cloud backend, machine learning, and customer-facing teams to build and maintain our multifaceted SDK for the iOS platform. This is a hands-on role where you will be given wide latitude to make technical decisions and influence product direction. What You Are Accountable For Hands-on coding, systems analysis, code reviews, design, and delivery of projects assigned Write well designed, testable, efficient code that meets coding standards Deliver new features, execute on the roadmap and plan for the future Enhance our existing iOS SDK for an optimal mobile experience Provide thought leadership on industry best practices around design, testing, and security Manage the iOS SDK API program and documentation Exercise creative thinking and imagination to find solutions to hard problems. Mentor other developers Responsibilities Hands-on coding, systems analysis, design, and delivery of projects assigned Deliver new features, execute on the roadmap and plan for the future Enhance our existing iOS SDK for an optimal mobile experience Provide thought leadership on industry best practices around design, testing, and security Manage the iOS SDK API program and documentation Mentor other developers What We Require 5 years of professional software development experience, preferably in a fast-paced environment Strong software development principles, including scalable software and architectural design patterns Experience executing on complex features leveraging the power of native iOS SDKs Strong knowledge of iOS along with competency using standard libraries Experience with evaluating and optimizing resource usage, including battery usage Bachelor’s degree in computer science or related field/experience preferred Experience with Android and/or SaaS a plus Experience with low-level system data collection from on-device sensors a plus Familiarity with Machine Learning and/or Signal Processing techniques a plus Join us! As we continue to scale our company, we are looking for people who know how to make an impact. We’re talking self-starting professionals who thrive in a fast-paced environment, process information quickly, and make intelligent decisions. The work is challenging and requires not only smarts but natural curiosity and tenacity. Teamwork is also important to us – we work together and play together. Prove has big plans; we’re excited and optimistic about the future. If this sounds like a career for you – come check us out. This team is located in the heart of Silicon Valley in downtown Redwood City and has unparalleled access to deep entrepreneurial expertise, high-caliber academic research institutions, and top-tier VC resources. Finally, it is important that you be authentic and be yourself. Prove is an equal opportunity employer committed to providing equal employment opportunity for all people regardless of race, color, religion, gender or sexual orientation, age, marital status, national origin, citizenship status, disability, veteran status, or other personal characteristics. 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.

Keywords: UnifyID, Ceres , Senior iOS Engineer, IT / Software / Systems , Redwood City, California