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) | 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) | 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) | 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
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
Feedback Loop (feedbackloop.com) is a growth-stage company whose agile research platform provides rapid consumer feedback to inform and accelerate innovation initiatives. At Feedback Loop, we change the way companies develop products for their customers by providing a platform that lets researchers and non-researchers alike learn faster and innovate smarter. We work with some of the largest B2C companies across industries including finance, insurance, healthcare, and media.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Typescript/NodeJS, Ruby, VueJS, Postgres, Mongo, Redis, Kafka, GraphQL and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time data streams with Kafka and using machine learning and natural language processing to empower real world business solutions. This position is full-time and remote (within the US), though remote engineers may be asked to visit our NYC headquarters occasionally when it is safe to do so.
Feedback Loop (feedbackloop.com) is a growth-stage company whose agile research platform provides rapid consumer feedback to inform and accelerate innovation initiatives. At Feedback Loop, we change the way companies develop products for their customers by providing a platform that lets researchers and non-researchers alike learn faster and innovate smarter. We work with some of the largest B2C companies across industries including finance, insurance, healthcare, and media.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Typescript/NodeJS, Ruby, VueJS, Postgres, Mongo, Redis, Kafka, GraphQL and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time data streams with Kafka and using machine learning and natural language processing to empower real world business solutions. This position is full-time and remote (within the US), though remote engineers may be asked to visit our NYC headquarters occasionally when it is safe to do so.
Feedback Loop | REMOTE USA | Full-stack Engineer | FULL-TIME | $100 - $140k | https://feedbackloop.com
Feedback Loop (feedbackloop.com) is a growth-stage company whose agile research platform provides rapid consumer feedback to inform and accelerate innovation initiatives. At Feedback Loop, we change the way companies develop products for their customers by providing a platform that lets researchers and non-researchers alike learn faster and innovate smarter. We work with some of the largest B2C companies across industries including finance, insurance, healthcare, and media.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Typescript/NodeJS, Ruby, VueJS, Postgres, Mongo, Redis, Kafka, GraphQL and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time data streams with Kafka and using machine learning and natural language processing to empower real world business solutions. This position is full-time and remote (within the US), though remote engineers may be asked to visit our NYC headquarters occasionally when it is safe to do so.
Feedback Loop (feedbackloop.com) is a growth-stage company whose agile research platform provides rapid consumer feedback to inform and accelerate innovation initiatives. At Feedback Loop, we change the way companies develop products for their customers by providing a platform that lets researchers and non-researchers alike learn faster and innovate smarter. We work with some of the largest B2C companies across industries including finance, insurance, healthcare, and media.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Typescript/NodeJS, Ruby, VueJS, Postgres, Mongo, Redis, Kafka, GraphQL and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time data streams with Kafka and using machine learning and natural language processing to empower real world business solutions. This position is full-time and remote (within the US), though remote engineers may be asked to visit our NYC headquarters occasionally when it is safe to do so.
Feedback Loop (feedbackloop.com) is a growth-stage company whose agile research platform provides rapid consumer feedback to inform and accelerate innovation initiatives. At Feedback Loop, we change the way companies develop products for their customers by providing a platform that lets researchers and non-researchers alike learn faster and innovate smarter. We work with some of the largest B2C companies across industries including finance, insurance, healthcare, and media.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Typescript/NodeJS, Ruby, VueJS, Postgres, Mongo, Redis, Kafka, GraphQL and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time data streams with Kafka and using machine learning and natural language processing to empower real world business solutions. This position is full-time and remote (within the US), though remote engineers may be asked to visit our NYC headquarters occasionally when it is safe to do so.
Feedback Loop (feedbackloop.com) is a growth-stage company whose agile research platform provides rapid consumer feedback to inform and accelerate innovation initiatives. At Feedback Loop, we change the way companies develop products for their customers by providing a platform that lets researchers and non-researchers alike learn faster and innovate smarter. We work with some of the largest B2C companies across industries including finance, insurance, healthcare, and media.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Typescript/NodeJS, Ruby, VueJS, Postgres, Mongo, Redis, Kafka, GraphQL and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time data streams with Kafka and using machine learning and natural language processing to empower real world business solutions. This position is full-time and remote (within the US), though remote engineers may be asked to visit our NYC headquarters occasionally when it is safe to do so.
If you're interested in building collaborative apps but not the architectural overhead of implementing CRDTs I'd recommend checking out roomservice.dev [1]. They've begun to power some other collaborative apps such as Tella.tv [2] - realtime browser-based video editing.
Alpha | New York City/NYC and REMOTE USA | Senior Fullstack Engineer, Engineering Lead | FULL-TIME | $120 - $180k
https://alphahq.com Alpha (alphahq.com) is a venture-backed growth-stage company based in New York, NY whose on-demand insights platform empowers clients to rapidly validate growth opportunities. Our clients use Alpha to accelerate experimentation, inform business decisions with customer wants and needs, deliver and scale agile research capabilities, and develop better products faster. By integrating traditionally manual tasks like audience sourcing, concept designing, test scripting, and data reporting, the platform accelerates time-to-insight from months to hours. In short, we're the fastest way for organizations to learn more about their future customers.
We're looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We us Node, Typescript, GraphQL, Ruby, VueJS, Postgres, Mongo, Redis and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time video and using machine learning and natural language processing to empower real world business solutions. These positions are full-time and either on-site at our NYC (SoHo) office or fully remote, though there may be occasional travel to our NYC office.
Alpha | New York City/NYC and REMOTE USA | Senior Fullstack Engineer, Engineering Lead | FULL-TIME | $120 - $180k
https://alphahq.com Alpha (alphahq.com) is a venture-backed growth-stage company based in New York, NY whose on-demand insights platform empowers clients to rapidly validate growth opportunities. Our clients use Alpha to accelerate experimentation, inform business decisions with customer wants and needs, deliver and scale agile research capabilities, and develop better products faster. By integrating traditionally manual tasks like audience sourcing, concept designing, test scripting, and data reporting, the platform accelerates time-to-insight from months to hours. In short, we're the fastest way for organizations to learn more about their future customers.
We're looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We us Node, Typescript, GraphQL, Ruby, VueJS, Postgres, Mongo, Redis and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time video and using machine learning and natural language processing to empower real world business solutions. These positions are full-time and either on-site at our NYC (SoHo) office or fully remote, though there may be occasional travel to our NYC office.
Alpha | New York City/NYC SoHo | Senior Fullstack Engineer, Engineering Lead | ONSITE/REMOTE-US, FULL-TIME | $100 - $180k |
https://alphahq.com Alpha (alphahq.com) is a venture-backed growth-stage company based in New York, NY whose on-demand insights platform empowers clients to rapidly validate growth opportunities. Our clients use Alpha to accelerate experimentation, inform business decisions with customer wants and needs, deliver and scale agile research capabilities, and develop better products faster. By integrating traditionally manual tasks like audience sourcing, concept designing, test scripting, and data reporting, the platform accelerates time-to-insight from months to hours.
In short, we're the fastest way for organizations to learn more about their future customers.
We're looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Ruby, Node, Typescript, GraphQL, VueJS, Postgres, Mongo, Redis and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real-time video and using machine learning and natural language processing to empower real world business solutions. These positions are full-time and either on-site at our NYC (SoHo) office or fully remote, though there may be occasional travel to our NYC office.
lpha | New York City/NYC SoHo | Fullstack Engineer, Senior Fullstack Engineer | ONSITE/REMOTE-US, FULL-TIME | $100 - $180k | https://alphahq.com
Alpha (alphahq.com) is a venture-backed and growth-stage company based in New York, NY whose on-demand insights platform empowers clients to rapidly validate growth opportunities. Our clients use Alpha to accelerate experimentation, inform business decisions with customer wants and needs, deliver and scale agile research capabilities, and develop better products faster. By integrating traditionally manual tasks like audience sourcing, concept designing, test scripting, and data reporting, the platform accelerates time-to-insight from months to hours.
In short, we're the fastest way for organizations to learn more about their future customers.
We're looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Ruby, NodeJS, VueJS, Postgres, Mongo, Redis and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real- time video and using machine learning and natural language processing to empower real world business solutions. These positions are full-time and either on-site at our NYC (SoHo) office or fully remote, though there may be occasional travel to our NYC office.
Alpha (alphahq.com) is a venture-backed and growth-stage company based in New York, NY whose on-demand insights platform empowers clients to rapidly validate growth opportunities. Our clients use Alpha to accelerate experimentation, inform business decisions with customer wants and needs, deliver and scale agile research capabilities, and develop better products faster. By integrating traditionally manual tasks like audience sourcing, concept designing, test scripting, and data reporting, the platform accelerates time-to-insight from months to hours.
In short, we're the fastest way for organizations to learn more about their future customers.
We're looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Ruby, NodeJS, VueJS, Postgres, Mongo, Redis and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real- time video and using machine learning and natural language processing to empower real world business solutions. These positions are full-time and either on-site at our NYC (SoHo) office or fully remote, though there may be occasional travel to our NYC office.
Alpha is a venture-backed and growth-stage company based in New York, NY whose on-demand insights platform empowers clients to rapidly validate growth opportunities. Our clients use Alpha to accelerate experimentation, inform business decisions with customer wants and needs, deliver and scale agile research capabilities, and develop better products faster. By integrating traditionally manual tasks like audience sourcing, concept designing, test scripting, and data reporting, the platform accelerates time-to-insight from months to hours. In short, we’re the fastest way for organizations to learn more about their future customers.
We’re looking for engineers who are curious about product development and consumer behavior, want to work on related challenges, and value opportunities to explore new technologies that execute against a robust, collaborative product vision. We use Ruby, NodeJS, VueJS, Postgres, Mongo, Redis and many other technologies, but we don't think it matters if you've used similar technologies on a different stack. Our engineering teams tackle a diverse and evolving array of challenges; from architecting and scaling our microservices to handling real- time video and using machine learning and natural language processing to empower real world business solutions. This position is full-time and on-site at our NYC (SoHo) office or full-time and remote (within the US), though remote engineers may be asked to visit NYC occasionally.
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.