Senior Android Engineer

Knot • New York, NY

26d • Onsite

About The Position

We are looking for a Senior Android Engineer who is energized by performance challenges, deep debugging, and building software that must perform flawlessly in demanding real-world environments. You will help architect and optimize an Android SDK that powers mission-critical experiences for some of the largest FinTechs in the world.
You will work across the entire lifecycle of our Android SDK, from design to release. This includes shaping how we profile performance, how we catch issues before they ship, how we test our public APIs, and how we produce documentation that makes our SDK easy to integrate. You will collaborate with product and engineering teams across the company, and you will help represent and advocate for our SDK both internally and externally.

Requirements

• Strong debugging skills with Android profiling tools
• Deep understanding of memory management, garbage collection, threading, and CPU analysis
• Experience working with asynchronous and multithreaded systems
• Ability to design, validate, and document public SDK APIs
• Strong testing practices including UI automation
• Familiarity with Android CI/CD systems and willingness to help improve them
• Comfortable validating releases end to end
• Clear communicator and effective collaborator
• Experience working with feature flagging and staged rollout strategies
• Deep experience with WebView including custom WebViewClient, WebChromeClient, resource handling, messaging, and hybrid debugging
• Strong experience with Java for Android development
• Experience building and maintaining Android libraries
• Familiarity with Gradle build tooling and performance tuning

Responsibilities

• Lead the design, architecture, and optimization of the Android SDK
• Profile and improve memory behavior, garbage collection patterns, CPU usage, allocation behavior, concurrency, and rendering
• Design stable public APIs and document them clearly for partner developers
• Strengthen test coverage with unit tests, UI automation, integration tests, and performance tests
• Co-own the Android CI/CD workflows to ensure reliable and safe releases
• Investigate complex production issues and build guardrails to ensure they do not reoccur
• Produce thorough documentation that improves integration experience
• Represent Android platform considerations during technical planning and reviews
• Advocate for integration best practices internally and externally
• Promote high standards around clarity, reliability, and engineering craftsmanship

Benefits

• Competitive base salary + up to 20% annual bonus + generous early employee equity + benefits
• 100% medical, dental, and vision insurance coverage for you and your dependents (U.S.)
• Unlimited PTO
• Parental leave
• Beautiful NYC office in the heart of Flatiron
• Herman Miller Aeron desk chair
• Food (snacks, frequent lunches & often dinner for those working late)

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed
• Number of Employees: 11-50 employees