Our mission is to develop the best education in the world and make it universally accessible. Our culture is eng-driven, friendly, and very data-driven thanks to our large userbase. More info about working as an engineer at Duolingo here: https://www.youtube.com/watch?v=WThT8sufdBE
Tech stack: (frontends) Swift/Kotlin/TypeScript, (backend) Python/Kotlin/Postgres/Dynamo, (infra) AWS/k8s/Terraform.
We're always hiring for engineers. A few roles below:
Senior Engineering Manager, Monetization: https://careers.duolingo.com/jobs/8414653002
Senior Android Engineer: https://careers.duolingo.com/jobs/8217266002
Engineering Manager, Chess: https://careers.duolingo.com/jobs/8385137002
Senior iOS Software Engineer: https://careers.duolingo.com/jobs/8318257002
Base salary: $200K-300K for Senior Eng Manager, $177K-$240K for the others (+equity).
Perks: free lunch, 2-week winter break + 20 days of flexible time off.
Fullstory provides privacy-preserving session replay and analytics for websites and mobile apps. Our session replays are nothing short of magical - they look almost like a video of the user's screen (with private details redacted) - and the combination with analytics creates eye-opening insights.
Remote (US):
* Senior Software Engineer, Android - $160~170k - Java, Rust, Kotlin, Compose Multiplatform - https://www.fullstory.com/careers/jobs/3be8b5f8-b05c-4221-b9...
* Senior Software Engineer, iOS - $160~170k - Objective-C, Swift, SwiftUI - https://www.fullstory.com/careers/jobs/1c9234a4-af67-428d-91...
Atlanta, USA (1 day per week in office):
* Software Engineer, Digital Experience Analytics - Go, TypeScript, GCP - https://www.fullstory.com/careers/jobs/a786962d-68c1-48fa-8b...
* Software Engineer, Subtext - AI agents, Go, TypeScript - https://www.fullstory.com/careers/jobs/073bfc41-0ac6-4e59-a5...
We have additional engineering and product design roles open in Colombia and Czechia as well as other roles in product management, sales, HR, support, and solutions in the US and UK. See the full list at https://www.fullstory.com/careers?ashby_jid=bce3fcba-6b80-43...
For US roles, you can expect regular raises & bonuses, equity, and benefits including: health insurance, 401k matching (Vanguard), annual learning stipend, unlimited PTO, parental leave, and more. I take about 4-5 weeks vacation a year, in addition to ~3 weeks worth of company holidays (federal holidays + the week of Christmas to New Years.)
Folks in other countries can also expect a strong benefits package, but I'm not as versed on the details.
Additionally, you get a 5-week sabbatical after 5 years of employment - I took mine about a year ago, and it was fantastic.
To apply, please submit your info on the website, and our recruiting team will get in touch with you. If you have questions, feel free to reply here or contact me directly. (I'm an engineer on the iOS team, but I'll do my best to answer questions.)
[NEW ROLE FOR EXCEPTIONAL NEW GRADS OPEN]
Spruce lets users control their data across the web. Instead of users logging into platforms, we believe platforms should request to access data vaults controlled by users.
The demand for trusted digital ID is accelerating as AI deepfakes begin to destroy most of the ways we use to verify identity today. How private or secure is it to hold your driver's license or passport up to a webcam to get a bank account? Was it ever private or secure? Stable diffusion can break so much of this already. Society will need trusted digital IDs and credentials. Our mission is to allow them to be controlled by individuals, with safeguards to prevent descents into surveillance states and checkpoint societies.
We are the main implementers of category-defining initiatives such as the digital ID program for the California DMV, and the verifiable digital credentials program in Utah. We are private sector participants in NIST's National Cyber Security of Excellence initiative for privacy-preserving digital ID.
We are hiring skilled engineers who care about making a real impact in improving public services, digital autonomy, and user privacy for the world. We work closely with public sector agencies, and have high regard for public servants. We have a strong engineering and customer-oriented culture, and are not simply a SaaS product or AI wrapper. Our roles are not for the faint of heart: you will be expected to work hard and learn a lot in this role.
Our engineers are ambitious to get outcomes for our customers and their constituents. On any given day, they may write great Rust/C#/TypeScript, deal with mainframe dumps, read policy documents, respond to technical RFIs/RFPs, manage on-prem environments, implement new NFC + Bluetooth protocols in Swift/Kotlin, create CI/CD processes that enforce W3C accessibility guidelines and i18n requirements, rewrite lost specs from disassembled binaries, figure out stablecoin payments, and design new protections for public key infrastructure. It is a team effort, and people with T-shirt shaped skills are able to collaborate and learn a ton from each other every day.
We are interested in candidates who want to be proud of the meaningful impact they make for society, even if it takes time to get right. This is not the right job for someone who wants to "join a cool new AI startup" that implodes or exits in under a year.
See our roles here: https://jobs.lever.co/sprucesystems/
EnergyHub | Engineering Manager | Full-time | REMOTE (US)| Salary $195k
EnergyHub | Senior Engineer | Full-time | REMOTE (US)| Salary $170k
Apply for Director of Engineering here: https://grnh.se/4eq0bxsv2us
Apply for Engineering Manager here: https://grnh.se/jtfoq9qr2us
Apply for Senior Engineer here: https://grnh.se/rf88lxfk2us
See all our open roles and apply here: https://grnh.se/30f1ece22us
Want to work on helping to decarbonize the electric grid and transportation in the US? (the two biggest sectors for impact)
Want to do it at scale? (we control over 2.5 million devices across the US making up over 4 gigawatts of electrical load for utilities that service 1/3rd of the entire US population)
Come work with me building some of the largest VPPs (virtual power plants) on the planet at EnergyHub. (What's a VPP? See page two of https://live-energy-hub.pantheonsite.io/app/uploads/2026/01/... )
EnergyHub’s software makes it easy for millions of smart device owners to partner with their utility and help decarbonize the grid. Our platform lets consumers turn their smart thermostats, electric cars, EV chargers, batteries, and other products into virtual power plants that keep the grid stable and enable higher utilization of solar and wind power. You’ll be a part of building the tech that’s at the center of it all.
Tech stack includes: Java, Kotlin, React, Snowflake, dbt, AWS, Docker, Python, PostgreSQL
All roles are remote but if you like offices we have them in Brooklyn, NY and Burlington, VT.
Note that we can NOT sponsor visas at this time.
My name is Marius and I am the CTO at AREO (https://goareo.com/).
AREO, founded in January 2023 by a team with 20+ years of combined experience in retail and startups, is a young startup specializing in developing innovative solutions for supermarkets and grocery retail stores. Our cutting-edge B2B SaaS platform optimizes workflows for employees by providing real-time access to inventory, product information, and customer inquiries. We serve large supermarket chains in Germany and across the EU.
About a year ago we brought a backend developer on board through "HN - Who is hiring" and are now seeking a Lead Product Engineer / Engineering Manager and a Senior Android Developer with a minimum of 8 years of experience (preferably in startups) as we just closed another 1M+ ARR contract with a major retail chain and are growing quickly.
For the Product Engineer / Engineering Manager (but not the Android Developer) role professional knowledge of German is highly preferred.
If you're passionate about building innovative retail products from scratch, these roles are for you.
Backend Stack: Ruby / Rails (8.x), StimulusJS / Hotwire / Turbo, AlpineJS, Postgres, Docker, DigitalOcean, OpenAPI, LLMs
Mobile Stack: Kotlin, Room, Jetpack Compose, Hilt Perks: Fully remote roles (Europe), work where you are most productive, sizeable equity in a rapidly growing company, flat hierarchies, no-ego work environment, work in a lean but highly experienced team
Apply here: marius[at]goareo.com and mention “HN - Who is hiring?” and the role you are applying for in the subject.
Product Engineer: (React/Typescript) who would work closely with product and design to build user-facing parts of the platform. You will craft performant, stable frontends that explain technical concepts to non-technical users and help us iterate fast based on customer feedback.
AI Engineer: Applied AI plus strong software engineering. You will build, evaluate, and deploy LLM-driven features like deep document analysis and interactive chat, working with models from OpenAI, Anthropic, and Gemini. Expect hands-on Python, ML system design, experimentation, and production reliability. Bonus for RAG depth and frameworks like LangChain, LlamaIndex, or Hugging Face.
Backend Engineer: (looking for Kotlin/Java/Scala experience). You'll work across the backend: building enterprise integrations, large-scale scraping and parsing pipelines, and systems that let users apply LLMs to millions of documents to generate insights at scale.
We're looking to build our in-person team in NYC but also open to remote!
Apply: https://starbridge.ai/careers and mention HackerNews or email recruiting@starbridge.ai with your resume.
We make people do push-ups before opening addictive apps - verified through camera pose detection. Our goal is to replace doomscrolling with exercise.
500k+ downloads, bootstrapped and profitable, very quickly growing.
Looking for someone strong in Kotlin Multiplatform + Compose Multiplatform + Swift/SwiftUI who works independently, uses AI to ship fast, and can implement a pixel-perfect Figma design.
Bonus: Supabase, Amplitude, native Android/iOS knowledge (e.g., Screen Time).
Small team, work directly with founders, long-term role. We’ve got big plans to make Pushscroll the app of the year, and there are a lot of challenging problems to get there.
Reach out: contact@pushscroll.com