Mobile Engineer (SDE 3)

Engineering /
Full-time /
Lumos Labs is the world leader in brain training. Since 2007, over 100 million people have used the Lumosity brain training program to train and improve their cognitive skills. Designed like a gym for your brain, Lumosity offers daily workouts that draw from a library of over 40 games targeting cognitive areas, including Memory, Attention, Flexibility, Information Processing Speed, and Reasoning. Lumosity is available on the web and as mobile apps (iOS and Android).

Today, our vision has expanded to the exciting new frontier of digital medicine. We are applying Lumosity technology and science—including an unprecedented data set and over 100 peer-reviewed research articles—to explore and develop digital programs to treat, monitor, or rehabilitate those with cognitive and neurological conditions. We are nearing the completion of clinical trials for our first digital therapeutic product, which targets adult ADHD.

We are working toward several major product and business milestones in 2024 that will spark company growth:
- Completion of an entire rebuild and relaunch of Lumosity on a new tech stack
- Regulatory clearance and commercial launch of our digital therapeutic for ADHD
- A rebuild and extension of our research platform, which supports internal research as well as dozens of ongoing research studies from academia and industry

Lumos Labs is headquartered in San Francisco, California, with remote colleagues country- and world-wide.

About a new team in India
We are creating a new team in India to extend our product development capabilities, helping us hit our upcoming milestones and capitalize on the growth opportunities they will unlock. 

The India team will initially extend the engineering and marketing capabilities of the US-based team as we work toward the rebuild and relaunch of Lumosity. The team will rapidly grow into a cross-functional product development hub that can drive business-critical pieces of our consumer, medical, and research roadmaps. In the longer term, there may be an opportunity to add functions beyond product development.


In this role, you'll collaborate closely with engineering teammates to design and build software for a large user base. You'll also regularly interact with product managers, designers, domain experts, and stakeholders. We're seeking a candidate with a track record of successfully shipping software products and a passion for cognitive health and wellness.

What you will do

    • You will primarily be developing/coding and problem-solving.
    • Involve in the decision-making process to influence system and code architecture.
    • Lead the definition of implementation details (the “how”) by working with engineering teammates.
    • Documentation — work with teammates to create technical specs/implementation plans. 
    • Collaborating with product managers and stakeholders to define product requirements
    • Champion best practices. Offer input and recommendations for development tactics.
    • Participate in and guide development processes that are agile and continuously improved. 

Who you are

    • Developer at heart who can write clean, maintainable, and well-documented code that adheres to best practices.
    • Self-starter — internally motivated to take ownership and responsibility 
    • Team player — enthusiastic about small teams and working together to succeed
    • Continuous learner — eager to learn what’s necessary to fulfill responsibilities
    • Empathetic — understanding team members’ and customers' diverse perspectives and experiences.
    • Excellent communicator — proficient in conveying ideas effectively
    • Proactively identify and address potential risks, ensuring a smooth and secure operation.
    • Comfortable with ambiguity, excited by reducing uncertainty.
    • Draws inspiration from our products' positive impact on many users, demonstrating a genuine concern for their experience.

What you have

    • 6+ years of experience building mobile applications 
    • Proven track record of shipping high-quality mobile applications.
    • Experience with native mobile application development in either Android or iOS 
    • Proficiency in Dart and Flutter Framework is a big plus.
    • Solid understanding of mobile app architecture, design patterns, and best practices.
    • Experience with consuming and integrating APIs (REST, GraphQL, etc.)
    • Experience with unit testing frameworks (e.g., Mockito).
    • Familiarity with build and continuous integration tools
    • Ability to analyze and convert business requirements into technical requirements
    • Experience working on well-crafted, performant software systems that serve large numbers of users
    • Prior experience working in a startup environment is great to have

What we offer

    • The excitement and fun of an early-stage startup paired with the maturity and stability of a later-stage business with substantial revenue and company infrastructure.
    • Flexible work culture: while we work in hybrid mode, we allow dedicated remote-only work periods.
    • Competitive compensation packages, including salary and benefits on par with later-stage companies and equity options on par with early-stage ones.
    • Flexible time off throughout the year to rest, reset, recharge, and an end-of-year holiday break.
    • Generous company-sponsored medical insurance that covers all dependants
    • Continuous learning budget for conferences, professional and skill development – think Udemy Courses, Coursera, and books.
    • Monthly fitness/wellness, internet, and phone reimbursements.