Preparing for an interview at Superhuman requires a balanced approach. You must demonstrate both deep technical mastery and a strong passion for product quality. The hiring team looks for engineers who are not just execution-focused but are also deeply opinionated about user experience.

Role-Related Knowledge – You must possess an expert-level understanding of your primary mobile platform (iOS or Android). This includes deep knowledge of language features, memory management, concurrency models, and modern UI frameworks. Be prepared to explain the "why" behind your architectural choices.

Problem-Solving Ability – During technical rounds, interviewers want to see how you think. When presented with a complex algorithmic or system design problem, communicate your thought process clearly. Start with a brute-force approach, discuss the trade-offs, and then optimize.

Product Empathy – Superhuman is a product-led company. You are expected to have tried the product before your interviews. Be ready to give detailed, constructive feedback on the mobile application's performance, design, and user flow.

Culture & Communication – The team values collaboration, humility, and a drive for excellence. You should be able to discuss your past projects with a focus on business impact, technical leadership, and how you navigated challenges with teammates.

The interview process at Superhuman is rigorous but highly structured, typically taking a few weeks to complete. It is designed to evaluate candidates across multiple dimensions, ensuring a strong technical and cultural fit. The company puts a premium on clear communication, technical depth, and product awareness.

You will experience a mix of screening calls, live coding sessions, architectural deep dives, and behavioral conversations. The engineers and managers you meet are collaborative and often provide helpful hints during technical challenges, aiming to simulate what it is actually like to work together.

This visual timeline outlines the typical progression from your initial recruiter touchpoint to the final decision. Candidates should use this sequence to pace their preparation, focusing on core CS fundamentals early in the process before shifting focus to system design and product-specific feedback.

Algorithmic Problem Solving

The computer science fundamentals round focuses on your ability to write clean, efficient, and bug-free code under time constraints. You will face LeetCode-style questions, typically ranging from easy to medium-high difficulty.

Be ready to go over:

• String and Array Manipulation – Efficient parsing, sliding window techniques, and multi-pointer approaches.
• Data Structure Optimization – Knowing when to use HashMaps, Stacks, Queues, or Trees to reduce time complexity.
• Recursion and Backtracking – Solving complex combinatorial problems efficiently.
• Advanced concepts – Graph traversals (BFS/DFS) and dynamic programming concepts.

Example scenarios:

• "Implement an algorithm to parse a nested string structure and return its simplified form."
• "Optimize a search algorithm to run in logarithmic time over a custom data structure."

Mobile App Building & Platform Knowledge

This practical round requires you to build a functional mobile application or feature live. The goal is to see how you structure real-world mobile code, handle networking, manage state, and write tests.

Be ready to go over:

• UI & Layout – Creating responsive views programmatically or using modern declarative UI frameworks.
• State Management – Managing unidirectional data flow and state propagation.
• Unit Testing – Writing robust tests for your business logic, particularly ViewModels.
• Advanced concepts – Custom transitions, memory leak detection, and network request throttling.

Example scenarios:

• "Build a live-updating list view that fetches data from a public API, handles error states gracefully, and caches results."
• "Write unit tests for a complex state machine inside a ViewModel to ensure all edge cases are covered."

System Design (Mobile-Focused)

In this session, you will architect a complex mobile application from scratch. The focus is on client-side architecture, data flow, and performance optimization.

Be ready to go over:

• Offline-First Architecture – Designing local databases, synchronization engines, and conflict resolution strategies.
• Network Layer Design – Optimizing API payloads, handling slow connections, and implementing retry policies.
• Modularization – Structuring a large codebase to support multiple teams and fast build times.
• Advanced concepts – Image caching pipelines, push notification handling, and real-time socket connections.

Example scenarios:

• "Design the client-side architecture for an email client that must sync thousands of messages and remain fully functional offline."
• "Architect a real-time collaborative document editing system on a mobile device."

Behavioral & Product Fit

The behavioral and bar-raiser rounds evaluate your alignment with Superhuman's values, your career ambitions, and your product intuition.

Be ready to go over:

• Product Critique – Providing structured feedback on the Superhuman application.
• Conflict Resolution – Discussing past professional disagreements and how you resolved them.
• Impact and Ownership – Explaining how you drove a project from conception to launch and measured its success.
• Advanced concepts – Mentoring junior engineers, influencing product roadmap decisions, and managing technical debt.

Example scenarios:

• "Tell me about a time you noticed a major performance bottleneck in a production app and how you went about fixing it."
• "How do you balance the desire for perfect code quality with the business need to ship features quickly?"

As a Mobile Engineer at Superhuman, your daily work will revolve around maintaining and evolving the core mobile applications. You will be responsible for translating complex product requirements into highly performant, maintainable code.

Your day-to-day tasks will include:

• Writing high-quality, testable code in Swift or Kotlin to build new user-facing features.
• Optimizing the mobile applications for maximum speed, responsiveness, and battery efficiency.
• Designing and implementing robust offline-first synchronization protocols to ensure an uninterrupted user experience.
• Collaborating closely with product designers to implement pixel-perfect, fluid animations and micro-interactions.
• Participating in thorough code reviews to maintain high engineering standards across the mobile codebase.
• Troubleshooting complex production bugs and performance regressions using profiling tools.

You will also work closely with backend platform teams to design efficient APIs that minimize mobile data usage and latency.