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

HostGPO | Full-time | Remote | $200,000 - $240,000 / yr + equity

We’re looking for a Lead Engineer to help shape the future of HostGPO’s platform, data systems, and technical direction. This person will be a senior builder and technical leader - someone who can architect and ship scalable systems, navigate messy real-world business logic, and partner across the organization to solve problems.

- Strong full-stack fluency, with particular preference for Python, JavaScript/TypeScript, and React - Experience building and scaling backend systems, APIs, data platforms, and large-scale web applications - Experience with GraphQL and modern application architecture

Apply here on LinkedIn: https://lnkd.in/ezEQr_FX

Curie | AI Engineer | Hybrid (Chicago), Remote (San Francisco) | Full-time

Curie is a telehealth platform combining clinical expertise with AI to deliver personalized, accessible care — intelligent intake, treatment matching, and AI-powered tools for clinicians. Team includes ex-founders, clinicians, and engineers from Stanford, Harvard, UCLA, Berkeley, and AWS. Well-funded and growing fast.

We're hiring an AI Engineer to own the microservice layer powering our clinical AI: agentic intake workflows, RAG pipelines grounded in medical guidelines, session/memory management for long-running clinical agents, and HIPAA-grade observability and safety guardrails. You'll shape the AI architecture of a healthcare product from the ground up.

Stack: Langgraph, Langfuse, Go, Python, TS, GraphQL, gRPC/Connect-RPC, PostgreSQL, GCP/Vertex AI, AWS Bedrock.

Looking for: 5+ years engineering, meaningful production AI/ML experience, LLMs in production (prompting, structured output, evals), RAG and agentic patterns, comfort across Go + Python + cloud. Bonus: FHIR/HL7, fine-tuning, healthcare AI background, startup experience.

Apply: https://jobs.ashbyhq.com/curie/cea56a9a-d238-4101-a56c-f94a4...

AI engineer and Fullstack Engineer We are vysr GmbH, an early-stage startup on a mission to reinvent performance management for asset‑intensive industries. Using AI‑powered performance mining, we identify improvement potential, recommend high‑impact actions, and help organizations run asset management in a strategic, value‑driven way.

We're continuing building the platform to grow post MVP — and we’re looking for an engineers who want to build the application further

Your Responsibilities (AI engineer)

Develop, train, and optimize machine learning models for performance analysis, forecasting, and automated recommendations Build scalable AI services that integrate seamlessly with our cloud‑native backend Collaborate on the design of data pipelines and feature engineering processes Work with structured and unstructured data from enterprise systems and operational sources

Influence architectural decisions for our AI stack, from model serving to real‑time inference

Your Responsibilities (fullstack engineer) Build and scale frontend and backend systems from scratch Develop modern, responsive user interfaces using React, Tailwind CSS, or Material UI Implement REST and GraphQL APIs and integrate with complex enterprise systems such as SAP S/4HANA Design and maintain data pipelines and database architectures (e.g., PostgreSQL, Snowflake) Build real‑time features using WebSockets or Server‑Sent Events (SSE) Implement secure and scalable authentication and authorization (e.g., OAuth2, JWT, SSO)

Location: Onsite in Munich or Berlin Contact: steffen@vysr.io LinkedIn: www.linkedin.com/in/steffen-medele

Subsalt (getsubsalt.com) | Senior Product Engineer | Remote (US Only) | Full Time Much of the world's most valuable data — healthcare records, financial transactions, clinical trial data — can't be easily analyzed because it contains sensitive personal information. Today, access to this data is controlled through slow, manual governance processes that can take months to approve. Our goal is to make regulated datasets easy to analyze without exposing the people inside them.

We're looking for an ambitious senior software engineer to join our team. You'll be working directly with enterprise customers to design and extend the core building blocks of our system: scalable data pipelines (Python, Ray, Pytorch), backends (Typescript+Node+Graphql+Rust), agent interfaces (MCP, mem0, ???), and Kubernetes-based customer deployments (Helm, Terraform). The role is customer-facing, the product and mission are really ambitious, and you'll be helping to establish product priorities and company culture on top of your technical contributions.

Would love to chat if this sounds interesting - reach out to jobs at getsubsalt.com and mention HN, include your LinkedIn + Github + resume and briefly describe something you've worked on recently that you're excited about.

More info: https://wellfound.com/jobs/3994817-senior-product-engineer

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.

Instinct Science | Senior Software Engineer (React Native) | REMOTE (US) | Full-Time | $130K–$160K

Instinct Science is the AI leader in veterinary medicine. We build the industry's first clinical intelligence platform — combining a cloud-native EMR, AI-powered scribing (ScribbleVet), real-time clinical decision support, and Plumb's drug information — in one system that helps veterinary teams work smarter, not harder. We acquired ScribbleVet in early 2026 and are building out its next chapter.

This role is embedded directly in the ScribbleVet product team. You'll own the mobile app used daily by thousands of veterinarians to automate clinical documentation.

WHAT YOU'LL DO: - Build and own cross-platform features end-to-end in React Native (iOS + Android) - Identify and resolve performance bottlenecks — state management, native bridges, CI/CD - Ship real AI-powered features alongside a small, high-output team - Collaborate closely with design, product, and backend engineers

WHAT WE'RE LOOKING FOR: - Deep React Native expertise with production mobile app experience - Strong product instincts and QA discipline — you care about what you ship - Actively using AI coding tools

STACK: React Native, Expo, TypeScript, GraphQL

Apply: https://instinctscience.applytojob.com/apply/4Yj4DavJ6D/Seni...

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

Ashby | YC 19 | REMOTE | Hiring Product Engineers | Sr: $153k-$220k, Staff: $190k-$275k

Ashby is the all-in-one recruiting platform powering hiring at the world’s most innovative companies. If you cmd+f “Ashby” you’ll see that we’re powering many of job postings in this thread!

* Grew our engineering team from 30 -> 60 last year with plans to double again in 2026.

* 80%+ of our engineering team is made up of Senior-Staff+ level Product Engineers. We give an unusual amount of ownership to our engineers to build features end-to-end. Many of our most loved features were build entirely by a single engineer!

* 100% remote asynchronous culture with an even distribution of engineers across North America and Europe

* Full transparency on engineering levels + comp: https://www.ashbyhq.com/blog/engineering/leveling-and-compen...

Stack: TypeScript (frontend & backend), React, GraphQL API, Node.js, Postgres, Redis.

Full list of open roles: https://www.ashbyhq.com/careers

River | Senior + Staff Engineers (Elixir, React, ML/AI) | SF or NYC or REMOTE (US, Europe, South America) | Full-Time | $150K-$250K + equity | https://jobs.ashbyhq.com/river

I'm Alex, founder and CEO of River. I also wrote the first line of code and still ship PRs.

River is a client-first Bitcoin-only financial institution building the financial app people use every day to save in bitcoin and spend in dollars. We custody over 25,000 BTC, serve individuals and businesses across the U.S., and are profitable. We publish cryptographic proof of reserves monthly and our company financials annually.

Here's what our engineering team is working on:

  - Real-time Bitcoin and USD payments, trading, and settlement on an Elixir monolith with a unified GraphQL API
  - Next-generation Bitcoin custody with quorum signing, key ceremonies, and geo-redundant infrastructure
  - Scaling our ML/AI systems (Python, PyTorch, XGBoost, LLMs) to automate operations and tackle fraud/risk
  - A ground-up React and React Native rewrite of our consumer app
  - Porting our Lightning Network infrastructure from Go into Elixir

  - Senior Software Engineer (React, Full-stack) | $150K-$220K
  - Staff Software Engineer (Elixir) | $200K-$250K
  - Staff Software Engineer (ML/AI) | $200K-$250K

RepSpark | Engineering | REMOTE (US) | Full-Time | https://www.repspark.com

RepSpark is the top SaaS B2B wholesale e-commerce platform for brands in apparel, footwear, and accessories. For example, we're how golf courses across North America and Europe purchase brands like Titleist, Peter Millar, Kjus, etc.

Stack: GraphQL, React, TypeScript, PostgreSQL, AWS

We're actively hiring:

* Senior Product Engineer, Front-End: Own customer-facing product work end-to-end in React/TypeScript, turning complex B2B e-commerce workflows into fast, accessible interfaces while helping modernize our legacy app — https://apply.appone.com/job/69cd53910f5e0e111fb5f819

Range Finance | Mclean, Virginia - On-site | Software Engineers (Senior/Staff/Principal) | Full-time https://www.range.com/public/careers We're building the first AI wealth platform. Hiring senior+ software engineers to partner closely with our co-founders and engineering leadership team. We're a Series C company with ~100 people passionate about making wealth management better, faster, and cheaper for every household. We're open to relocating candidates. Email me (tyler at range dot com) your LinkedIn profile if you have strong technical experience and you're interested!

Stack: Claude, Node, GraphQL, React, Typescript, AWS Comp: $150 - 300k base + equity

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