Backend Engineer

Air Apps

📍San Francisco, CA
Posted May 25, 2026

Job Overview

Position

Backend Engineer

Company

Air Apps

Location

San Francisco, CA

Work Type

On-site

Job ID

li-4418930585

Job Description

About Air Apps
At Air Apps, we believe in thinking bigger—and moving faster. We’re a family-founded company on a mission to create the world’s first AI-powered Personal & Entrepreneurial Resource Planner (PRP), and we need your passion and ambition to help us change how people plan, work, and live. Born in Lisbon, Portugal in 2018—and now with offices in both Lisbon and San Francisco—we’ve remained self-funded while reaching over 100 million downloads worldwide.

Our long-term focus drives us to challenge the status quo every day, pushing the boundaries of AI-driven solutions that truly make a difference. Here, you’ll be a creative force, shaping products that empower people across the globe.

Join us on this journey to redefine resource management—and change lives along the way.

The Role
As a Backend Software Engineer, you will be responsible for designing, building, and maintaining the server-side components of our applications. You will collaborate closely with product managers, frontend developers, and other cross-functional teams to deliver robust and scalable backend services that power critical features and support rapid growth.

Please note that this post serves the purpose of enhancing our talent pool while we prepare to launch the official job. As soon as it gets posted we will get in touch with you.

Responsibilities

  • Architect and Develop Services: Design, implement, and maintain RESTful and/or GraphQL APIs, microservices, and server-side logic to support a variety of products and platforms.

  • Database Management: Collaborate on schema design, query optimization, and data modeling to ensure efficient, reliable data storage and retrieval.

  • System Scalability and Performance: Develop solutions that scale to millions of users, optimizing code for throughput, latency, and cost-effectiveness.

  • Security and Compliance: Implement security best practices (authentication, authorization, encryption) and ensure compliance with relevant data protection and privacy laws.

  • Testing and Quality Assurance: Write and maintain unit, integration, and end-to-end tests, and participate in code reviews to uphold code quality standards.

  • Monitoring and Maintenance: Set up monitoring, logging, and alerting systems; troubleshoot production issues to ensure high availability and minimal downtime.

Requirements

  • Education & Experience: Bachelor’s degree in Computer Science or related field, or equivalent practical experience.

  • Core Skills: Proficiency in one or more backend languages (e.g., Java, Go, Python, Ruby), experience with frameworks (e.g., Spring Boot, Django, Express.js), and expertise with relational and/or NoSQL databases.

  • Architecture & Tools: Solid understanding of distributed systems, microservices, and cloud infrastructure (AWS, GCP, or Azure).

  • Soft Skills: Analytical and problem-solving mindset, effective communication skills, and a collaborative approach to teamwork.

What benefits do we offer?

  • Apple hardware ecosystem for work.

  • Annual Bonus.

  • Medical Insurance (including vision & dental).

  • Disability insurance - short and long-term.

  • 401k up to 4% contribution.

  • Air Conference – an opportunity to meet the team, collaborate, and grow together.

  • Transportation budget

  • Free meals at the hub

  • Gym membership

Diversity & Inclusion
At Air Apps, we are committed to fostering a diverse, inclusive, and equitable workplace. We enthusiastically welcome applicants from all backgrounds, experiences, and perspectives. We celebrate diversity in all its forms and believe that varied voices and experiences make us stronger.

Application Disclaimer
At Air Apps, we value transparency and integrity in our hiring process. Applicants must submit their own work without any AI-generated assistance. Any use of AI in application materials, assessments, or interviews will result in disqualification.

Compensation Range: $80K - $160K

Interview Prep

AI-powered insights to help you prepare

Key Skills

Required:
Preferred:

Practice Questions

💡Technical Questions (3)
  • 1.How would you design a backend architecture for a feature that needs to scale to millions of users while keeping latency and cost low, as required for our AI-powered PRP?
  • 2.Can you explain your approach to implementing security and compliance, specifically authentication and authorization, in a distributed microservices environment?
  • 3.When designing a database schema for a highly relational resource planning application, how do you balance the need for structured data with the flexibility required for rapid feature iteration?
🎯Behavioral Questions (3)
  • 1.Tell me about a time you had to collaborate closely with product managers and frontend developers to deliver a robust backend service under a tight deadline.
  • 2.Describe a situation where you identified and resolved a critical production issue that was affecting system availability. What steps did you take?
  • 3.Give an example of a time you championed code quality and testing standards within your team. How did you ensure others adopted these practices?
🧩Situational Questions (2)
  • 1.You are tasked with building a new GraphQL API for our PRP, but midway through development, product management drastically changes the data model requirements. How do you handle this?
  • 2.You notice that a newly deployed microservice is experiencing intermittent high latency, but the logs aren't showing any obvious errors. What is your troubleshooting process?

Resume Keywords

Make sure these keywords appear on your resume

RESTful APIGraphQLMicroservicesScalabilityCloud InfrastructureData ModelingCode ReviewSystem PerformanceAuthenticationUnit TestingDistributed SystemsQuery Optimization

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