Littlebird is a smarter, more personal AI assistant (Mac + Android) that builds an understanding of your world. We now have a few thousand customers and growing quickly, but there is still a lot to build. We're a global team of PhD's, OSS hackers, and productivity fans who want to make utilizing LLM's easy and accessible to anyone. If you get excited about cross-platform AI tools, conversational inference, and experimental graph systems - then see below!
Brand new roles to join the team:
Sr. / Staff AI Engineer (Systems and Arch) - next-gen memory + retrieval, python, Node, Rust
AI Engineer (Agent Intelligence & Retrieval) - conversational AI, agentic reasoning, RAG, python
Sr. React / RN Engineer - clean UI and fast data collection across mobile + web
Product Designer - design AI features + components across, desktop mobile, and web, JS/HTML/CSS
Swift Engineer - all things Swift, concurrency, iOS and MacOS
Full job descriptions and apply to: https://littlebird.ai/careers
It's a gnarly infra problem with huge scale, combined with an interesting product space that we think legitimately benefits from tasteful AI automation. We're doing cool things with Nitro Enclaves to prove that our auctions are fair. And our founding team have done this before with great success, first at MoPub (sold to Twitter) and MAX (sold to AppLovin).
We're hiring (all remote) for:
- Senior Fullstack Engineer https://jobs.gem.com/cloudx/am9icG9zdDogum5THF3fORqb1eEupFQx
- Senior Infrastructure Engineer https://jobs.gem.com/cloudx/am9icG9zdDo4vl4A1sEcc7sDQf8ZYiqR
- Senior Android SDK Engineer https://jobs.gem.com/cloudx/am9icG9zdDqPAWu1cxr3PmEuuTIdliI6
- Senior iOS SDK Engineer https://jobs.gem.com/cloudx/am9icG9zdDpOy3Qmt1fLsOu4gKwtwWTz
Our philosophy is to keep the team small, well-paid, and productive. We deploy every day and our monorepo CI suite takes about a minute to pass.
The best way to apply is directly through those jobs pages but if you have other questions you're welcome to email me at peter@cloudx.io. I always post here on HN because it's where I got my career started back in highschool; I will personally make sure you get a response if you apply.
Zetier develops real-world tools and capabilities to secure our nation in the short- and long-term. If you’re excited to delve deep into low-level systems, exploit dev, and more alongside a group of passionate hackers, then we’d love to hear from you.
Open-sourcing our work as much as possible is integral to Zetier and what we stand for. As folks who learned to hack on platforms like Linux, we aim to give back to the OSS community. Not only do we encourage our engineers to contribute, but we go a step further, adding monetary incentives to do so.
We’re looking to find the right people for a range of roles, including:
+ Vulnerability Researcher
+ Android Security Engineer
+ CNO Embedded Engineer
+ CNO Software Engineer
+ IT Security Engineer
+ Senior Technical Lead
+ Business Developer
+ Program Manager
All open positions: https://zetier.breezy.hr/
Our approach and benefits: https://zetier.com/careers/
Different skill set? Drop us a line at hello@zetier.com
Screen-time app that makes you do push-ups before you can scroll addictive apps. 350k+ users.
Looking for someone strong in Kotlin Multiplatform + Compose Multiplatform + Swift/SwiftUI who isn't afraid of platform-specific APIs (Screen Time on iOS, Accessibility/UsageStats on Android) and can ship very fast.
Stack: Supabase (auth/DB/edge functions), Superwall, Amplitude, MediaPipe for pose detection. Good design sense matters - you'll be translating Figma → production UI.
Small team, work directly with founders. It’s a long-term role in an exciting app (help us fight doomscrolling!) where you can have a lot of impact. Reach out: contact@pushscroll.com
Musa is a mobile app helping women understand their hormonal health through a cycle tracker with personalization and a small companion character. Thousands use it daily.
We’re a small team, ship fast, and follow a Shape Up-style process. Low meetings, high ownership.
You will - Own our iOS and Android apps
- Shape and build features end to end
- Ship often to a user base that shares the product organically
- Tackle challenges in personalization (AI), performance and UI delight
You
- Enjoy building and care about quality
- Like autonomy and product thinking
- Have strong Swift/Kotlin experience
Links Role: https://www.notion.so/Mobile-Senior-Software-Engineer-L5-2b1...
App: https://apps.apple.com/us/app/musa-period-self-care-pet/id65...
Chat: german at musa.com
FUTO is an organization dedicated to developing, both through in-house engineering and investment, technologies that frustrate centralization and industry consolidation. Our work consists of a combination of in-house engineering projects, targeted investments, generous grants, and multi-media public education efforts. Our principles are here: https://futo.org/about/what-is-futo/
Machine Learning Engineer - FUTO Keyboard
FUTO Keyboard is a privacy-first software keyboard for Android. Every prediction inference routine runs entirely on-device; no user data can ever leave the device. We support over 150 keyboard layouts and languages, and over 700 layout + language combinations (not all of them include dictionary or predictions)
Swipe typing is an important part of the mobile typing experience for many. Applying machine learning here poses a unique challenge due to the requirement of needing to support so many layouts and languages, as well as user-added personal dictionary words (or even layout customizations!), with limited data. We have previously collected and publicly released a US English QWERTY dataset: https://huggingface.co/datasets/futo-org/swipe.futo.org/
We are looking for a machine-learning researcher or engineer to work through these challenges and help us improve the swipe typing experience in FUTO Keyboard.
More info here: https://futo.org/jobs/machine-learning/
To apply, send your resume and cover letter to jobs at futo dot org with the subject of the position you're interested in.
We’re a fully-remote company with a global footprint in over 20 countries. We're growing, profitable, employee-owned, no dependence on outside funding. Applicants from all geographies and backgrounds are welcome.
We are looking for passionate individuals for whom programming is not just a job but it’s something they love to do. We're obsessed with computers, programming, big data, databases, compilers, hardware, math, data science, and the internet. Does this sound like you? Please apply to join our team.
Our code base is very friendly to new contributors. You'll have a fully-functional development environment within hours (fully automated) and be pushing commits on your first day. Deployments to production happen multiple times per day and finish in less than 2 minutes. Effectively all of our codebase is written in Python, Rust, SQL, Javascript/TypeScript, and Nix. The core technologies you'll need familiarity with to be productive are Python, PostgreSQL, Linux, and Git.
We operate at a larger scale than typical startups. We operate two datacenters with high performance servers we've built that are capable of dealing with the volumes of data we process. We've implemented our own distributed file system. We do full-scale web crawls. We download and perform static analysis on the entire universe of Android APKs and iOS IPAs that are published. Unlike a typical startup where you'll spend half of your time in meetings, and the other half fixing bugs from Jira tickets— at MixRank you'll get to challenge yourself with difficult technical problems that will help you to grow as an individual.
We're hiring continuously for the positions below— they aren't singular positions that will close once filled. Our philosophy on hiring is that the candidate is more important than the position. For each new member of the team, we design a custom role and responsibilities that are specialized to their interests. Other companies will come up with a long list of specific requirements for a position with the expectation that you'll exactly replace someone from the team, or that you'll be the perfect tetris piece that satisfies the job requirements decided by a committee. MixRank is more pragmatic: we'll first get excited about having a unique individual on the team, then we'll figure out the best way to accommodate their specific talents.
-- Junior Software Engineer - Remote (Global), Full-Time
We're looking for remote junior engineers that have 0-3 years of professional experience in software, and 5+ years of curiosity exploring computers, programming, and technical hobby projects. This is an open-ended entry role with mentorship and diverse opportunities to work on all areas of our product: databases, distributed systems, infrastructure and tooling, data analysis, machine learning, frontend/backend web development, APIs, data mining, data modeling, and more. To stand out, please highlight what makes you unique: passion for computing, curiosity and side projects, work ethic, niche research, etc.
Ideally you've already graduated, but if you still have one or more years left of school, please feel free to apply anyway, and if you're the right fit for the team we'll figure out a way to accommodate your schedule.
https://www.ycombinator.com/companies/mixrank/jobs/Fnwsojk-j... --
Software Engineer - Remote (Global), Full-Time
We're hiring generalist software engineers to work on web applications, data mining, machine learning/data science, data transformation/ETL, data modeling, database scaling, infrastructure, devops, and more. We'll cater the role to whatever subset of these areas match your interests.
Beneficial experience includes PostgreSQL, Python, Rust, Linux, TypeScript, Nix, frontend/backend web development, and data mining.
https://www.ycombinator.com/companies/mixrank/jobs/RXQspen-s...
--
I’m Kiran, Chief of Staff (CoS) at MixRank, a fully remote data startup building go-to-market intelligence. We’re US-incorporated but hire globally, and we’re bringing on new teammates to join a fast-moving team with real ownership and impact.
Hi all, I’m Yuriy, founder of Puma.tech. Previously worked as software engineer & developer advocate at Cloudant (YC S08, Acq. by IBM), Meteor (YC S11), Parse (YC S11, Facebook/Meta), and explored AI/ML (computer vision for self-driving cars).
We have two products:
1. Puma iOS & Android – browser with built in LLMs & Wallets. Private by design.
2. Puma AI app for Mac – ChatGPT/Atlas, but with ability to pick different model providers and fall-back to local-first ones for data privacy.
Open Roles: Eng (iOS/MacOS, Android, Ai/ML, Browser Extensions), Based Social Media Intern; Internships: Eng, Design, Growth
We’ve raised a few rounds from some of the best builders in crypto and ai:
Protocol Labs (YC S14), Chris Larsen (Ripple), Anatoly Yakovenko (Solana), Illia Polosukhin (NEAR Protocol), Sridhar Ramaswamy (Snowflake CEO, Neeva, Greylock), Jason Warner (poolside.ai, ex-GitHub CTO), Don Ho (Orange DAO, Quantstamp W18), Evil Rabbit (Vercel), John Phamous (SF Compute) and other amazing builders.
How to Apply: email careers+hn [at] puma.tech with your GitHub, a note on what you're most proud of building and what you'd like to build next.
Thank you!
Fieldwire is a construction field management software building world-class tech to disrupt the $10 trillion construction industry! With 2M projects worldwide, we have partnered with over 5000+ clients in 100+ countries and 14 languages. We got acquired by Hilti in November of 2021! If you are looking to disrupt and modernize an industry that has been neglected by tech for years, feel free to apply!
iOS Engineer (US - Remote) - 3+ yrs of experience, BS or MS in CS or equivalent experience. Apply here: https://grnh.se/50hoz2kg2us
Android Engineer (US - Remote) - 0.5+ yrs of experience, BS or MS inc CS or Equivalent experience. Apply here: https://grnh.se/3452vy6n2us
Check out our other roles here: https://www.fieldwire.com/jobs/
www.Fieldwire.com https://engineering.fieldwire.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
- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband, other mobile sensors and ML.
- Extracting raw map data from satellite maps and the web leveraging ML and AI
- 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
- Frontend tools to visualize and debug location data at scale
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