airCFO (https://aircfo.com) | Founding Engineer | Remote, UTC -8 - UTC +2 | Full-time, part-time possible for the right candidate
airCFO is an AI-powered accounting & finance services partner to 300+ startups (current/former clients include Anthropic, Replit, Harmonic), and we are building a platform to supercharge our service's capabilities. We're hiring a founding engineer to build the systems behind it: a retrieval/RAG context layer over all our tools, and the internal apps (TypeScript, Node, Python/FastAPI, React, Postgres, Claude + MCP) our teams use daily. We want someone senior who drives coding agents hard but refuses to lose the plot — clean architecture and a real mental model of the whole system. Production RAG/agents a plus, not a requirement. You'd report to a hands-on fractional CTO; small team, high autonomy.
Email me at yair [dot] aviner {at} aircfo.com with "HN - Founding Engineer" in the subject.
JOON | Remote (US Timezones) | Full-stack Engineer | Full Time | https://joon.io
JOON is the must-have benefit that workforces actually use and appreciate. Employers use JOON’s card-connected experience to automatically make any category or popular merchant from Peloton to Udemy into a reimbursable employee benefit. Unlike other benefits platforms, employees can use their own credit cards to make purchases which are automatically tracked, reported, and reimbursed via our integrations with Plaid and Stripe. The end result is that employees can get reimbursed by their employers at whatever [gym, health food shop, learning platform, etc] they prefer. Other benefits platforms might see only 20% utilization by employees; we routinely see utilization of JOON at >70%. Our customers are eliminating the typical administrative burden while achieving higher benefits utilization, employee satisfaction, and workforce retention.
Our core tech stack is straightforward: - Ruby on Rails - React - Typescript - PostgreSQL
A few sample projects you might work on:
- Improving our purchase classification algorithms
- Building and improving deep integrations with our financial partners (e.g. Stripe, Plaid) with their latest APIs, and with HRIS platforms and identity providers
- Migration of our frontend application fully to TypeScript
Our team is tiny (<5 engineers!) but rapidly growing; currently we're looking for full-stack engineers who identify with our mission and want to make a huge impact. To find out more (and apply) check out the full post here: https://angel.co/l/2wkn8P
JOON | Remote (US Timezones and Europe UTC+0/1) | Full Time | https://joon.io
JOON is revolutionizing employee wellness benefits by making them flexible and easy to use. Employers choose the transaction categories they'd like to reimburse employees for - typically related to Health & Wellness, or Learning & Development - and employees' purchases are automatically tracked, reported, and reimbursed via our integrations with Plaid and Stripe. The end result is that employees can get reimbursed by their employers at whatever [gym, health food shop, learning platform] they prefer. Other benefits platforms might see only 20% utilization by employees; we often see utilization of JOON at >70%. Our long-term vision is to improve employment for everyone, and we're starting by making wellbeing more accessible.
Our core tech stack is straightforward: - Ruby on Rails - React - Typescript - PostgreSQL
Our team is tiny (<5 engineers!) but rapidly growing; currently we're looking for full-stack engineers who identify with our mission and want to make a huge impact. To find out more (and apply) check out the full post here: https://angel.co/l/2wkn8P
Congrats on shipping on schedule! My experience with React Native for iOS has been pretty pleasant so far given how young the libraries are. My main frustrations so far have been with the Navigator component (both the 'fully native' and the 'emulation native' versions) and some inconsistent documentation, though the latter I suspect is the result of rapid API changes. Pretty short learning curve, though, and the results have performed well, so I'd recommend anyone with moderate experience with React to check it out. Looking forward to diving in to the Android version soon.
airCFO is an AI-powered accounting & finance services partner to 300+ startups (current/former clients include Anthropic, Replit, Harmonic), and we are building a platform to supercharge our service's capabilities. We're hiring a founding engineer to build the systems behind it: a retrieval/RAG context layer over all our tools, and the internal apps (TypeScript, Node, Python/FastAPI, React, Postgres, Claude + MCP) our teams use daily. We want someone senior who drives coding agents hard but refuses to lose the plot — clean architecture and a real mental model of the whole system. Production RAG/agents a plus, not a requirement. You'd report to a hands-on fractional CTO; small team, high autonomy.
Email me at yair [dot] aviner {at} aircfo.com with "HN - Founding Engineer" in the subject.