Shapes | Fullstack Engineer (AI Product) | ONSITE | San Francisco | Full-time

We’re building an AI chat platform where humans and AI interact in group chats, voice, and video.

Small team, high ownership, ship fast. We talk to users and build things we actually use.

We’re looking for a fullstack engineer to build product features end-to-end.

What you’ll do: - Build and ship features across frontend and backend - Work on real-time chat, onboarding flows, and AI interactions - Own features from idea → production - Collaborate closely with design and iterate quickly

Tech stack: React / Next.js, Python, real-time systems

Looking for: - Strong fullstack experience - Product mindset (you care about UX, not just code) - High agency - you move fast and take ownership

Apply: https://jobs.shapes.inc

I'm building Diamond Hands Fantasy — think fantasy sports meets Wall Street. Users draft S&P 500, Nasdaq-100, and DJIA stocks into C-Suite roster positions (CEO, CFO, COO, etc.) and compete head-to-head in weekly matchups based on actual market performance. Same skill-game legal framework as DraftKings/FanDuel. Incorporated Delaware C-Corp, fully spec'd, prototype built, GTM ready. Looking for a CTO co-founder who can own the technical stack end-to-end. Stack is Next.js, React Native, Supabase, Postgres, Redis, BullMQ, Polygon.io for live market data. Ideal background: fintech, gaming, or real-money platforms. Product ownership mindset over contractor mindset. Equity: meaningful co-founder stake with standard vesting. Based in NYC. Remote-friendly for the right person. Reply here or email [diamondhandsfantasy@gmail.com].

Rainbow Insurance (https://www.userainbow.com) | Backend Software Engineer | Full Time | Hybrid (2 days on-site in San Francisco) | Golang Rainbow is a tech-enabled small-business insurer. We built software that underwrites small businesses (starting with restaurants) and evaluates them against various risks to provide them with insurance policies. We've been live for only 2.5 years but already one of the top insurers of restaurants in the US. We are looking for an experienced software engineer to join our team and help us grow and innovate. We've raised around $20m to date with a series A around end of 2024. We've grown massively over the past year. Most of our problems we're currently working on are about building tech as we expand out to other categories of insurance and insuring other types of businesses.

Job Requirements:

- 5+ years of professional experience as a software engineer

- Experience in fintech is an optional but major plus

- Familiarity with our tech stack (Golang, React through a Next.js app, GraphQL, PostgreSQL) is beneficial but not required

Why You’d Enjoy Working with Us:

- You're joining a small fast paced team: 12 engineers, 40 people total

- Direct impact on solving real-world problems for small businesses

- Hybrid work model with 2 days on-site in SF

- Competitive salary and benefits

If interested, please reach out at hn@userainbow.com with your resume attached to the email.

You can also visit our site to learn more: https://www.userainbow.com/about

Deepline | NYC (ONSITE) | Founding Full-stack Engineers and Forward Deployed Engineers | $160k–$220k + meaningful equity

User interfaces are dead. Knowledge workers will exclusively work through agent interfaces like Claude Code/Cowork. We've built the interface layer to enable that.

One API that unifies hundreds of data providers, workflows, and data infrastructure to agents like Claude Code. We shipped our mvp last month; hundreds of early adopters signed up and are using Deepline.

You’d build core platform: agent-facing abstractions, infrastructure, UI. TypeScript/Python/Next.js/Postgres. $3.3M raised from Lerer Hippeau + Looker founding team. Technical founding team from Uber, Lyft, Capchase, MIT Lincoln Lab, Waterloo.

https://code.deepline.com/careers

RDE Advisors | Senior Full-Stack Engineer | REMOTE (Europe, LatAm, India) | CONTRACT | $4K–6K USD/mo

We're a boutique commercial real estate advisory in NYC building two production web applications: a CRE search platform and a property management platform with QuickBooks integration. Both are live with real users. Stack is Next.js 14, TypeScript, Supabase/Postgres, Prisma, Anthropic Claude API, Mapbox, Vercel + Contabo.

Hiring one senior full-stack engineer to take both products from early-stage to production-mature. You'll work directly with the founder — no engineering managers, no PMs, no committees. 35–40 hrs/week, 6-month minimum, exclusive. Rate is $4,000–5,000 USD/mo for India-based engineers and $5,000–6,000 USD/mo for engineers in Europe or Latin America.

Requirements: 5+ years full-stack, 3+ shipping production web apps, strong Next.js/React + TypeScript, shipped at least one production LLM integration (Claude preferred, OpenAI fine), 2+ hours daily overlap with NYC, available for a 30-min video check-in every weekday at 9:30am ET. This is a product engineering role that calls the Claude API, not an ML/research role.

Non-negotiables: you personally write 100% of the code (no subcontracting, no "my team"), video on for all calls, personal verified GitHub, Hubstaff time tracking, ID check + one prior-client video reference before contract signing.

Apply: https://forms.office.com/Pages/ResponsePage.aspx?id=bw3hQziC...

We respond to qualified applicants within one week. No DMs — please apply through the form.

Bustem.com | Founding Engineer | NYC (On-site) | $140k–$180k + 0.25%–1.0%

Bustem helps e-commerce brands & more, find and shut down copycats, counterfeiters, and unauthorized sellers.

In <12 months: $3M+ ARR, 150+ brands, profitable, no outside capital.

We’re hiring a Founding Engineer to build the core systems behind detection + enforcement.

What you’ll do: Build real-time infringer detection (scraping + AI) Build automated enforcement systems (agents/workflows at scale) Own systems end-to-end (architecture → deployment → iteration)

Stack: Next.js, Postgres, modern backend infra, LLMs

You: Ship fast, high ownership Comfortable with ambiguity Build systems, not tickets

Why join: Profitable + real traction No legacy / no bureaucracy Direct impact on product + revenue Early enough to matter a lot

NYC in-person

Email: genci@bustem.co (send CV & GitHub / projects)

BrandMultiplier | Head of AI & Engineering | REMOTE | Fractional-to-Full-Time | Equity

We're a profitable B2B services company ($3M–$50M ARR clients) actively building a proprietary AI platform — and we need the technical leader to own the execution.

WHAT WE'RE BUILDING: A multi-agent AI platform that operationalizes our founder-story methodology into deployable client systems. Architecture spec exists, pieces are already in production. We're not starting from scratch — we're scaling a real build.

THE STACK: LLMs (Claude, GPT, Gemini), multi-agent orchestration (LangGraph/LangChain), RAG pipelines, vector databases, React/Next.js, Python/Node.js, AWS, n8n/Make for automation.

WHAT MATTERS MOST: You're not just an executor. You come to the leadership table with tools and approaches we haven't seen yet. You translate the CEO's vision into a technical spec, a build plan, and a shipped product — without needing everything pre-defined.

THE TEAM: 4 core people. You'd join the CEO, a Growth Strategist, and an Operations Manager — and lead one AI Engineer (your first direct report).

ENGAGEMENT: Starts fractional with a clear path to full-time and equity for the right fit. We're not VC-funded by design, so equity is unencumbered.

Read the full spec here: https://www.notion.so/brandmultiplier/Head-of-AI-Engineering...

Integral | Full Stack Developer or Technical PM | Remote (LATAM or US) | $40-90/hr | Contract | https://gointegral.co

Integral is a fractional CTO and AI transformation partnership for scaling businesses ($10M-$100M). We embed with clients as their technology team across strategy, architecture, and hands-on implementation. These are long-term retainer partnerships, not project work. We are a team of 4 today, scaling to 6-8 by the end of 2026.

We’re hiring for two roles:

Full Stack Developer | Remote | Full-time (~40 hrs/week) | LATAM or US

You ship features end-to-end across multiple client projects. Our clients do not have tech departments, so requirements come as business problems, not detailed tickets. You translate “customers need to see order history” into a working feature: data model, API, UI, and deployment.

AI is how we operate. Our team ships faster than teams 3x our size because we use Claude Code, Cursor, and AI-assisted workflows across every phase of development. If you are still writing every line by hand, this is not the right fit. We want developers who have fundamentally changed how they build software with AI.

Stack across clients: Next.js, React, TypeScript, Node.js, Supabase, Shopify, n8n, HubSpot, Vercel. You do not need to know all of these. You do need to pick them up fast.

Technical Project Manager | Remote (US) | Part-time (~25 hrs/week)

You own client relationships and delivery coordination: weekly syncs, Slack, email, ClickUp boards, and scope management. You need to be technically fluent enough to spot a bad estimate and explain trade-offs in business language, but you are not writing code.

An AI-native workflow is required for both roles. “I’ve tried ChatGPT a few times” is not what we’re looking for. We evaluate how you use AI tools daily across your real work.

To apply: email hiring@gointegral.co with which AI tools you use daily, a specific example of how AI changed your workflow, and, for the developer role, a link to something you have shipped. Please confirm you've seen the specified pay range or your application may not be processed.

StraighterLine (straighterline.com) | Staff Software Engineer (Full Stack) | Remote (US Only) | Full Time Our mission is to create opportunities for career advancement through access to affordable education. We are also the market leaders in early childhood (ECE) training and certifications. We are looking for two Staff Engineers to help lead development on next-generation AI-assisted learning platforms.

You will be building modern, API-driven, scalable services and applications with React/Next.js, TypeScript, Node.js, GraphQL, and AWS, using AI-native development practices. You will collaborate on architecture, shared services, internal tooling, and interface design, owning features from concept to production.

Competitive base salary, bonus and benefits (401k match).

Apply here: https://jobs.lever.co/straighterline/36d8f56b-14ac-4a35-af0c... and please mention HN under Additional Information. To get full attention, also send your resume, github, and linkedin profiles to hr at straighterline.com with subject line Hacker News.

Comulate | Senior Engineer (3+ YoE) | ONSITE in San Francisco, CA We're automating the $7T insurance industry with AI. Seed stage in terms of headcount (~ 20 people) but Series B in terms of business traction (+ cash-flow positive). We've intentionally stayed under the radar.

- Product has caused customers to literally cry tears of joy

- Experienced eng team from Airbnb / Brex / LiveRamp

- Stack: TS, Postgres, React, GraphQL, and Next.js

Apply here: https://about.comulate.com/careers

(AU ONLY / REMOTE)

Senior engineer to step into a ~30k LOC system (~300 files) and help shape it properly.

Production-style system with real complexity. Interdependent modules, async flows, external integrations.

Stack: Python/FastAPI backend, Next.js frontend, early-stage routing/AI components.

Expectations:

- quickly understand an existing codebase

- trace data flow across modules/services

- identify structural issues and bottlenecks

- make pragmatic improvements without overengineering

Starts with a deep dive and direction, with room to stay involved and build it out.

AU-based only (R&D constraints).

Email: mattahbla+hn@gmail.com

Onos Health | Staff Eng (AI), Lead Eng (Backend), Lead Eng (Data) | San Francisco (Hybrid) | $200-250k + Equity | [https://onoshealth.com](https://onoshealth.com/)

30 cents of every behavioral health dollar in the U.S. is wasted — on ineffective care, administrative overhead, and outright fraud. Onos fixes this by ensuring every healthcare dollar goes toward high quality care.

Our AI platform helps health plans identify where care is going wrong, get members on the right clinical pathway, catch fraud and abuse, and automate reviews that clinical teams currently do by hand. We're well funded by top healthcare investors and live with some of the nation's largest health plans.

Stack: Python/Django, Next.js/TypeScript, PostgreSQL, AWS (Bedrock, ECS, Glue, S3). We ship with Claude Code and CodeRabbitAI.

Hiring:

- Staff Software Engineer (AI) — LLM pipelines for clinical note extraction, level-of-care classification, eval frameworks - Lead Engineer (Backend) — clinical workflow engine, AI/ML pipeline integration, multi-tenant architecture - Lead Engineer (Data/Integrations) — payer data pipelines, EDI X12/FHIR/HL7, claims feed infrastructure

All roles: https://onoshealth.com/career Email: [joinus@onoshealth.com](mailto:joinus@onoshealth.com) (mention HN)

Pinwheel | Full-Time | Hybrid (NYC) | Series B | https://www.pinwheelapi.com/company/careers

Pinwheel is the Plaid for payroll — APIs and SDKs that give banks, fintechs, and lenders real-time, consumer-permissioned access to payroll data across 1,800 platforms covering 80% of US workers.

- Fullstack Engineer (backend-leaning) - https://grnh.se/j2bgmdl83us (Python / Django, Go)

- Fullstack Engineer (frontend-leaning) - https://grnh.se/v237ybv83us (React, Next.js)

Hybrid 3x/wk in NYC (Union Square)

Visa sponsorship not available.

Scorecard AI | Founding Engineer | San Francisco (Onsite) | Full-Time | https://scorecard.io

Scorecard builds simulation environments and reward models that frontier AI labs and enterprises use to train and evaluate their agents. Same discipline that made self-driving cars work, applied to LLM-based agents.

Our founding team built simulation infrastructure at Waymo, SpaceX, and Uber ATG. I'm Dare, the CEO and scaled Waymo's simulation org to 200+ engineers. We're ~7 people, 7-figure revenue, $3.75M seed led by Kindred Ventures with angels from OpenAI, Apple, Waymo, Uber, Perplexity, and Meta.

Founding Engineer ($175K-$280K + strong equity). Primarily backend. You'll own technical domains end-to-end. We use agentic tooling (Claude Code) heavily. Moving fast and working customers matters more than deep expertise in any one language.

Stack: TypeScript, Node.js, Next.js, PostgreSQL, ClickHouse, Temporal, GCP.

jobs@scorecard.io

HIFI Labs (https://hifilabs.co) | Remote (US) | Senior Fullstack Engineer / Engineering Manager

Join HIFI Labs and work on innovative projects with well known and iconic musicians. Past artist activations include Bruno Mars, Linkin Park, Jisoo / Zayn,Rüfüs Du Sol, Dua Lipa, and Mike Shinoda. We're looking for a Senior Fullstack Engineer passionate about design, user interactions, and privacy.

You'll work with TypeScript, React/Next.js, Firebase and explore new frameworks like Astro. Experience with Styled Components, continuous deployment and devops is a plus. We also play around with React Native / Expo.

Sound like a fit? Email us at pierre at hifilabs dot co

flaconi | Germany / Berlin | Full Time | https://www.flaconi.de | e-commerce

flaconi is an online e-commerce for beauty products, founded in 2011 in Berlin. We are active in 12 countries and expanding to more. We're primarily on AWS, use React, Next.js, Vercel for web, Flutter for our mobile app - you will find more details on the job listings.

1. Staff Software Engineer - Frontend - €85.000 - €105.000 EUR - https://grnh.se/kke6q552teu - we will very likely work together. Happy to answer questions.

2. QA Engineer Mobile - €60.000 - €83.000 EUR - https://grnh.se/ad3i2y62teu

eventfirst | Senior Full-Stack Engineer | Berlin, Germany | REMOTE (CET) | Full-time

We are applying AI to organize corporate events.

We are looking for a senior engineer with at least ten years of full stack experience, a strong focus on product and UX, and optionally some experience building LLM based products. Currently we are focussed on building tooling that enables us to capture domain knowledge from experts to streamline prompt creation and evaluation. Our tech stack is Typescript, React, Next.js and Tailwind. On the backend we use Drizzle with Neon, deployed and monitored via Vercel. Please note that we are working in the CET timezone. We have pre-seed funding from a major US VC and are experienced founders. You’ll be working alongside the founders (ex-Apple, ex-Airbnb, ex-Tulip, ex-Tourlane) and will have a chance to shape the company, product and of course the engineering culture.

Apply here: https://eventfirst.jobs.personio.com/job/1646275

Shepherd (Series B) | ONSITE | San Francisco, CA

At Shepherd, we're pursuing the most ambitious technical vision in commercial insurance: fully autonomous underwriting. Shepherd is an AI-native commercial insurance platform transforming how high-hazard industries get covered.

The infrastructure behind the AI boom (data centers, semiconductor fabs, renewable energy assets) has to be built and insured, but traditional carriers weren't built for this speed. We built Shepherd to solve that.

We just announced our $42M Series B last week! That brings our total funding to over $60M — led by Intact Private Capital, the investment arm of one of the largest insurers in the world. Intact is not only our lead investor but also a carrier partner, a testament to the confidence the incumbent industry has in what we're building.

(Hear from our CEO here: https://www.shepherdinsurance.com/blog/behind-our-42m-series...)

(Hear from our CTO here: https://www.shepherdinsurance.com/blog/the-road-to-autonomou...)

This year, we’re doubling our engineering team from 20 to 40. We’re looking for product-minded engineers to join us as we continue to scale! We’re looking for someone who thrives on ownership, drives results, and cares deeply about both technical excellence and customer impact.

We’re hiring various mid-level, senior-level and staff-level engineers. See some of our openings below:

* Full Stack - Job Posting: https://jobs.ashbyhq.com/shepherd/c4081c3d-a79b-4ac9-aa19-78...

* Backend - Job Posting: https://jobs.ashbyhq.com/shepherd/395f4b75-cf05-4581-8408-8f...

* Machine Learning Engineer - Job Posting: https://jobs.ashbyhq.com/shepherd/797316b4-bdcc-4c0c-8bc2-46...

* Applied AI Engineer - Job Posting: https://jobs.ashbyhq.com/shepherd/26959124-aab2-446e-aa4d-72...

* Design Engineer - Job Posting: https://jobs.ashbyhq.com/shepherd/aa254ca8-6721-4770-9a9b-e0...

* Product Design - Job Posting: https://jobs.ashbyhq.com/shepherd/386f87c9-4315-4fc7-aad7-ec...

* Senior Technical Recruiter - Job Posting: https://jobs.ashbyhq.com/shepherd/ccab3e26-4fc8-4bc2-ada3-71...

Our stack includes: Typescript, React, Next.js, GraphQL w/ Apollo, Node.js, Postgres & Redis

Apply here: https://shepherdinsurance.com/careers

* In the form, be sure to mention that you heard about this opportunity via Hacker News.

If you want to read more about our team and culture, check out our blog: https://shepherdinsurance.com/blog