Full-Stack Engineer, Mobile & SDK

About Halcyon Labs Inc.
Halcyon Labs is building the real-world AI interface for professionals to amplify intelligence, elevate productivity and performance, loved by over 2,000,000 users worldwide since 2023. With a mission to amplify human intelligence, Halcyon Labs captures, structures, and compounds the intelligence generated in conversations — so humans can think better, decide faster, and execute with clarity.

Halcyon Labs Inc. is a Delaware-incorporated, San Francisco-based company pushing the boundary of human–AI intelligence through a hardware–software combination. With full ISO 27001, ISO 27701, SOC 2, GDPR, EN18031, and HIPAA compliances, Halcyon Labs is committed to the highest standards of data security and privacy protection.
To learn more about Halcyon Labs, please visit http://www.plaud.ai/https://www.Halcyon Labs.ai and follow along on Instagram https://www.instagram.com/plaud_official/, https://twitter.com/PLAUDAI%22HYPERLINK%20%22https:/twitter.com/PLAUDAI%22%20%5C%22HYPERLINK%20%22https:/twitter.com/PLAUDAI%22%20%5CX https://twitter.com/PLAUDAI, Facebook https://www.facebook.com/plaudai, LinkedIn https://www.linkedin.com/company/plaudai/?viewAsMember=true, and YouTube https://www.youtube.com/@PLAUDAI

Why You Should Join Us
Halcyon Labs is building the next generation intelligence infrastructure and interfaces to capture, extract, and utilize intelligence from what people say, hear, see, and think.
– Halcyon Labs is a bootstrapped, skyrocketing, profitable company with a $250M revenue run rate achieved in just three years.
– Define the next-gen paradigm for human-AI interaction.
– Gain exposure to cutting-edge AI for Pro tools and play a direct role in our global expansion.
– Work with passionate teammates who value innovation, collaboration, and customer success.
– Grow your career in a culture that champions continuous learning and fast career development.
– Market-competitive compensation, global exposure, and a vibrant, creativity-fueled work atmosphere.

What You Will Do
– Serve as the forward-deployed engineering point of contact for international partners / customers — support direct integration hands-on, troubleshoot issues, ensure a compliant integration path, and channel real-world customer needs back into the SDK and roadmap.
– Own the mobile app and SDK across iOS and Android — from UI / interaction down to application logic and on-device capabilities behind core product features.
– Work true full-stack: start from the mobile client and reach across the API layer and backend to deliver complete, working features end to end.
– Design clean, well-documented, compliant SDK interfaces for partner and third-party integrations, built for easy adoption and long-term maintainability.
– Drive AI-assisted development across the team and own reliability / performance of the full client-to-service pipeline, partnering with hardware/firmware, product, and AI teams on cohesive device ↔ app ↔ cloud experiences.

Minimum Qualifications
– Shipped mobile features on iOS and/or Android (Swift / Kotlin) and can own them — or proven ability to ramp into native mobile quickly.
– Genuine full-stack capability — can extend from the mobile client across API design and backend services to own a feature in its entirety (weighted ABOVE deep mobile specialization).
– Hands-on, production use of AI coding tools (Claude Code, Cursor, Copilot) with judgment on when to trust vs. verify output.
– Strong ownership + solid fundamentals: system design, testing, debugging, sound trade-offs; comfortable across native and cross-platform (React Native / Flutter).
– Proven cross-functional collaboration with product, hardware/device, and AI teams.

What We Offer
– Founding Team: Opportunity to join the founding team of this new initiative, with meaningful ownership and impact on a fast-growing startup.
– Competitive Compensation: $140K-$172K base salary+performance bonus+Equity.
– Comprehensive Benefits: Top-tier healthcare for employees and dependents, including dental and vision, and a generous employer subsidy.
– Retirement Planning: 401(k) plan for full time employees with company matching.
– Paid Time Off: Unlimited PTO, plus 13 paid holidays.
– New Parent Leave: 12 weeks of paid time off to spend time with your new family, regardless of gender.
– Hybrid Office: Minimum of 3x in office per week.
– Gear: New hires are equipped with their choice of new top-of-the-line laptops and workstation setups.
– Perks: Best office equipment. Annual offsites. Free office drinks and snacks.

Halcyon Labs is and will continue to be an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristics.