At In Tandem, we build technology that helps families manage everyday routines and navigate life’s biggest transitions. Through our four brands—OurFamilyWizard, Cozi, FamilyWall, and Custody Navigator—we help families stay organized, communicate well, and foster healthy childhoods.

We believe technology should strengthen relationships and make daily coordination less complicated. Everything we create is designed to lighten the mental load, reduce conflict, and support families through big and small moments.

If you want your work to make a real difference in the daily lives of parents and kids, In Tandem is the place where your impact will truly matter.

We're seeking a Senior Android Engineer to join our Growth team focused on Family Org (Cozi + FamilyWall). You'll design and run A/B experiments across the Android application to accelerate learning, test hypotheses, and deliver measurable value to users. You’ll lead our efforts to make experimentation faster, safer, and more valuable on the Android platform. This is a role where speed of learning matters as much as speed of shipping.

What You Will Accomplish

Getting to know teammates, technology, and tactics.

In your first month, you'll set up your local environment, ship your first small contribution, and learn the rhythms of our pod. You'll study the Cozi and FamilyWall Android codebases, understand how they differ architecturally, and identify the experimentation surface area. You'll build connections with product, design, QA, and backend teammates.

Design and run experiments.

By day 60, you'll be comfortable operating within our development lifecycle from planning through production releases. You'll be designing and instrumenting your first A/B experiments in the Android app — defining hypotheses, configuring feature flags, and ensuring clean data collection. You'll work across subscription, onboarding, and activation flows for Cozi and FamilyWall, and begin forming opinions on where the experimentation framework can improve.

Own the experiment loop end-to-end.

By 90 days, you'll be autonomously scoping, building, and analyzing Growth experiments. You'll proactively propose experiment ideas based on data and user behavior — not just executing what's handed to you. You'll participate in technical planning, anticipate edge cases, and balance iteration speed with app quality. You'll partner with product, design, and data to refine the hypothesis-test-learn cycle.

Scale experimentation and influence strategy.

Beyond your first few months, you'll shape the experimentation roadmap for Family Org Android alongside product and engineering leadership. You'll mentor teammates on experiment design, instrumentation best practices, and data hygiene. You'll drive improvements to conversion, activation, and retention across both Cozi and FamilyWall, and contribute to cross-platform alignment (Android, iOS, Web) for consistent Growth experiments.

Who You Are

1. Seasoned craftsperson. You've shipped production Android at scale, can navigate ambiguity, and know when "good enough" is the right call vs. when to invest in durability.
2. AI-powered builder. You don't just use AI tools — you advocate for them. You've integrated AI-assisted workflows into your development process and you're motivated to explore how AI can improve both how we build and what we build.
3. Data-driven operator. You believe in the scientific method — hypothesize, measure, learn — and you design clean instrumentation to power reliable insights.
4. Experiment evangelist. You don't just run experiments — you champion the culture. You push for clean hypotheses, resist shipping without measurement, and help the team learn faster.
5. Pragmatic optimizer. You embrace a bias for action. In Growth, the fastest path to good enough is often the best way forward.
6. Curious collaborator. You thrive on cross-functional teamwork and embrace unexpected hurdles with an open mindset.
7. Champion of inclusion. You create space for diverse voices and help guide the team toward the best solutions.
8. Low ego, high integrity. You value doing what's right over being right, and you're comfortable course-correcting when a better path arises.

What You Bring

1. 5+ years of Android development experience, building and shipping apps at scale.
2. Deep proficiency in Kotlin, including coroutines and Flow, and Android development best practices including managing Android core components (Activities, Services, etc.) and their lifecycles.
3. Experience with Android app architecture patterns such as MVVM, uni-directional data flow, and dependency injection frameworks (Hilt or Dagger).
4. Hands-on experience with in-app purchases, subscription flows, or related payment features.
5. Experience designing and analyzing A/B experiments — not just toggling feature flags, but owning the hypothesis-to-insight loop.
6. Experience integrating feature flagging tools such as LaunchDarkly or Optimizely.
7. Strong experience designing instrumentation schemas and ensuring data quality for experiment analysis (Firebase Analytics, Amplitude, Segment, etc.).
8. Enthusiastic adopter of AI-assisted development — you actively use AI tools (Copilot, Claude, Cursor, etc.) in your daily workflow to accelerate coding, debugging, and problem-solving.
9. Familiarity with Android build tools (Gradle) and CI/CD pipelines.
10. Experience with JUnit, MockK, and a quality-first testing mindset.
11. Proven experience leading feature delivery end-to-end within a cross-functional team environment, including technical planning and stakeholder alignment.

Nice to Haves:

1. Track record of elevating teammates — code reviews, pairing, sharing patterns — even without a formal leadership title.
2. Experience with Jetpack Compose and Material theming standards.
3. Familiarity with deep linking and attribution for user acquisition flows.
4. Experience building or optimizing cross-platform signup and subscription flows (Android, iOS, Web) to balance friction, compliance, and revenue impact.
5. Exposure to cross-platform collaboration (Web, API, iOS) for consistent Growth experiments.
6. Working knowledge of third-party SDK integrations (payments, analytics, feature flagging, experimentation).
7. Experience working across multiple Android apps or product lines simultaneously.
8. Familiarity with internationalization (i18n) — FamilyWall serves European markets, so localization awareness is a plus.
9. Familiarity with generative AI engineering workflows — prompt engineering, integrating LLM APIs into product features, or building AI-augmented user experiences.

Why Join?

We’re redefining family technology.

In Tandem brings together a growing portfolio of trusted tools that support families, and the professionals who guide them, through the moments that matter most. We bring clarity to chaos and stability to daily family life, helping parents feel less stressed so kids can have healthier childhoods.

Scale meets startup energy.

With more than 20 years of impact and a strong market presence, we’re entering a bold new chapter of growth. We have the foundation, the momentum, and the ambition to go further: expanding our reach, deepening our impact, and elevating the tools families and professionals rely on every day.

Purpose-driven. Performance-focused. People-first.

Our culture is rooted in accountability, curiosity, and collaboration. We value diverse perspectives, thoughtful problem-solving, and teammates who care deeply about building something that matters.

How We Support You

1. Medical: In Tandem pays 100% of the premium for employees AND 99% for all additional family members
2. 401k: Up to a 4% match with immediate vesting
3. Paid leave for all new parents
4. Learning & Development stipend for employees
5. Paid Time Off: 11 Holidays + Winter Break (3 Days) + Volunteer Time Off (1 Day) + Floating Holiday (1 Day)
6. Personal Time Off: 15 days for 0-1 years of employment + 20 days for 1-3 years of employment
7. Supportive and flexible working environment – work from anywhere!

Come As You Are!

In Tandem provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

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