Perry Street Software publishes Jack'd and SCRUFF, two of the world's largest LGBTQ+ dating apps on iOS and Android. Our brands reach more than 30 million members worldwide, so members can connect, meet and express themselves on a platform that prioritizes privacy, security, and community. Our company puts user privacy first, and doesn't sell data or use third-party ad networks.
As a Senior Mobile Developer, you will help us build the user-facing pieces of the next generation of Scruff and Jack’d. We are looking for engineers who are passionate about architecture and excited to become polyglot in their understanding of Swift, Kotlin, and backend framework languages. We are a small, nimble company, so the ability to make an impact is significant. The position is 40 hours per week and ongoing/full-time.
What you'll do:
- Clean architecture using dependency injection (Koin/Swinject), modules, and functional & reactive programming (RxJava/Combine) - Modern UIs with a live style guide and Jetpack Compose/SwiftUI - Test and behavior-driven development, starting with the ViewModel layer (see our blogs), using Quick/Nimble, KoTest, Konsist, and CombineExpectations. - We are pioneers of architectural linters (we are the #1 consumer of Konsist and introduced Harmonize for iOS). This enables us to apply architectural principles across a global, distributed team - Develop production-ready code serving millions of users right away - You can see more about our architectural approach on our Engineering blog at https://medium.com/perry-street-software-engineering or learn more about us at https://www.perrystreet.com/careers
Wake Up Call Service is a mobile app on iOS and Android that allows people to schedule a wake up call and get a call from a real, friendly human at the desired time. All calls happen through the app, so no phone numbers are exchanged. Get a chance to wake up sleepy people from all over the world!
Apply in the app - it's super simple: https://www.realwakeupcalls.com
- Radar is the geo-location dev tool
- Doing 1B+ API calls per day
- Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).
- We're based in NYC with our HQ in Union Square and remote friendly (US)
Interesting things we're working on:
- HorizonDB, our Geospatial database written in Rust
- Agents and MCP tools to visualize and debug location data at scale
- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband, other mobile sensors and ML.
- Anomaly detection to identify spoofed locations
- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time
- Multi-Region AWS K8s deployment, 99.99%+ availability
Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com
Pre-launch marketplace, web and iOS. Company is formed and self-funded, product is fully designed.
Open seats: Founding CTO, Head of Community Growth, Head of Partnerships, Head of Content and Brand, Head of Trust and Operations.
CTO: you've shipped mobile and web apps with payments, and you believe IRL matters as much as AI.
No salary. Profit share plus founding equity on a four-year vest. Details shared after an NDA.
Email cam@irli.io with a link to something you've built or grown and the seat you want.
We're an early-stage UK company building a mobile application, funded by its founder (just me), which is why the scope below is deliberately narrow.
I'm looking for an applied cryptographer to review a protocol specification before it ships. It is small and specific: three messages, two parties, signature-based, using hardware-backed keys on both iOS and Android. It uses standard primitives only (ECDSA over P-256, SHA-256) and invents no new cryptography; the question is how they are combined. The specification is written and frozen, with test vectors and the generator that produces them.
What I want is a competent second opinion on whether it is sound: six specific questions answered in writing. Not an open-ended audit or a penetration test. The person I'm looking for has either published on protocol security or reviews protocols professionally; being good with crypto libraries isn't quite the same thing.
One piece of contract work, not a role. Under a short mutual NDA.
Email clive@human8e.com by Sunday 4 October with a short summary of the protocol analysis you've done, and I'll send scope, timing and what I'd need from you.
Due to U.S. export control regulations, we can only hire U.S. Persons (U.S. citizens, Green Card holders, lawful permanent residents, or individuals granted asylum or refugee status).
Beacon AI builds intelligent systems that make aviation safer and more autonomous. We’ve completed multiple DoD programs and are expanding our team with exceptional technical leaders to push the boundaries of human-machine collaboration in the cockpit. At Beacon, you will lead by example, mentoring and growing a small team of talented engineers (typically 1–2 to start) while staying hands-on in design and execution. You’ll help shape critical systems that advance aviation safety and autonomy, working alongside a team that values effort, creativity, and accountability.
We’re hiring Senior/Lead Engineers with 5+ YOE who love solving complex problems. At Beacon, you’ll own your work end-to-end, from prototype to deployment, and literally see your code take flight in real world aviation environments! Roles:
++ iOS Engineer [Tech Stack: Swift, SwiftUI, UIKit, Mapbox]
++ Senior Security Engineer [FedRAMP ATO/SSP or DoD IL4/IL5, AWS/GovCloud]
++ Infra/Backend Engineer [Tech Stack: AWS]
++ WebApp/FrontEnd Engineer [Tech Stack: Python, Typescript, React]
++ Lead Autonomy/Robotics Engineer [Tech Stack: C++, Python, iOT]
We make Fantastical and Cardhop, award-winning calendar and contacts apps for macOS, iOS, visionOS, and Windows. We are a small, fully-remote company spread across the US and Europe, and welcome anyone from around the world. We prefer candidates that are in time zones between US Pacific Time and Central European Time.
We're looking for an enthusiastic and experienced Android developer to help bring the joy of Flexibits apps to Android. This will include learning the ins and outs of Fantastical and bringing its magic to Android, all the way from the natural language parser to the beautiful user interface.
Tech stack: Kotlin, C#, Objective-C, Swift, AppKit, UIKit, SwiftUI, C, C++.