Songscription | Founding Engineer | San Francisco, CA | In-Person/Remote

At Songscription, we are building state-of-the-art AI models to automate music transcription, with the vision of enabling any musician to learn any song, on any instrument, at any level.

Apply at https://songscription.ai/careers and/or feel free to shoot me an email at Email is hidden

BusbySim | Founding Engineer | London (Hybrid) | Full-time | TypeScript / React

BusbySim is a SysML v2 system safety platform helping engineers design safer aircraft and other safety-critical systems. We are early stage, already working with some of the UK's most interesting aerospace companies, and now looking for our first engineering hire. You will own hard product problems end to end, from custom language tooling to interactive modelling and safety analysis features, with real ownership and meaningful equity. Ideal for someone who enjoys first principles thinking, wants to shape the product and engineering culture, and is happy working close to customers.

To apply email Email is hidden. Full JD: https://tinyurl.com/busbysim-engineer

Atomic Tessellator | Front-end Engineer | REMOTE (UTC+12) | https://atomictessellator.com

We simulate materials at the atomic level for aerospace, defence, nuclear fusion, and advanced polymers. Our team of four built a near-comprehensive platform in the last year, we're the first to scale MLIPs across GPUs, and we're patenting our first rare-earth magnet substitute.

We're hiring a front-end engineer to take full ownership of our platform's UI, from testing to optimising performance to scientific visualisations.

Tech: Vue.js, TypeScript, Three.js, WebGL

More: https://atomictessellator.com/careers/front-end-engineer Apply: Email is hidden

At CloudX (https://cloudx.io) we’re building a new supply-side advertising platform for mobile publishers. Yes, it's ads, and yes, there's AI involved, so stop reading here if that's not interesting to you.

It's a gnarly infra problem with huge scale, combined with an interesting product space that we think legitimately benefits from tasteful AI automation. We're doing cool things with Nitro Enclaves to prove that our auctions are fair. And our founding team have done this before with great success, first at MoPub (sold to Twitter) and MAX (sold to AppLovin).

We're hiring (all remote) for:

- Senior Fullstack Engineer https://jobs.gem.com/cloudx/am9icg9zddogum5thf3forqb1eeupfqx

- Senior Infrastructure Engineer https://jobs.gem.com/cloudx/am9icg9zddo4vl4a1secc7sdqf8zyiqr

- Senior Android SDK Engineer https://jobs.gem.com/cloudx/am9icg9zddqpawu1cxr3pmeuutidlii6

- Senior iOS SDK Engineer https://jobs.gem.com/cloudx/am9icg9zddpoy3qmt1flsou4gkwtwwtz

Our philosophy is to keep the team small, well-paid, and productive. We deploy every day and our monorepo CI suite takes about a minute to pass.

The best way to apply is directly through those jobs pages but if you have other questions you're welcome to email me at Email is hidden. I always post here on HN because it's where I got my career started back in highschool; I will personally make sure you get a response if you apply.

Hi HN! CrossnoKaye is a Series C startup tackling climate change by transforming the heavy industrial sector. Our platform uses real-time optimization, advanced modeling, and modern cloud infrastructure to deliver 40% average energy savings and megaton-scale emissions cuts across industrial facilities. https://crossnokaye.com/

We’re hiring for 3 roles and looking for builders who want their work to have real-world climate impact:

1. Sr. Software Engineer - Control Systems |REMOTE (US)| This role would have the opportunity to support our control systems infrastructure initiative, which involves real-time control strategies, secure cloud communication, and large-scale system performance, all built in Go with AWS and Kubernetes. Deep Golang experience is a must-have.

2. Sr. Software Engineer – App Team | REMOTE (US)| In this role, you'd be partnering directly with physicists and data scientists on our Applied Science team to productionize cutting-edge research in physics simulation and optimization algorithms. Must have strong proficiency in Python and its data science ecosystem (e.g., numpy, pandas).

3. Sr. Software Engineer in Test | REMOTE (US)| We’re looking for a hands-on engineer who loves Python, backend frameworks, and automated testing. You’ll design and implement test frameworks for our ATLAS and Energy AI platforms, ensuring reliability across distributed, cloud-based systems. Must have strong proficiency in Python.

Interested? Email our team: Email is hidden -- Please include a resume and the title of the role you're interested in within the subject line.

Thank you & I look forward to hearing from you!

Continua AI | https://continua.ai | Multiple Roles | ONSITE (NYC/Seattle) | Full-time | Salary + Equity

At Continua (http://continua.ai/), we're on our way to solving Social AI, and we're expanding our team! We've built an AI agent that users can invite into group conversations to make planning, coordination, and information retrieval effortless. We're social creatures and it just seemed to us a huge opportunity to bring AI into group settings. We've seen strong retention over the last few months and want you to help us bring our product to the next level. Try adding our agent at http://continua.ai/ to group chats and kick the tires! https://techcrunch.com/2025/08/12/google-vet-raises-8m-for-c...

I’m David (https://www.linkedin.com/in/dpetrou/), the founder and CEO. Before starting Continua, I was a Distinguished Software Engineer at Google. We’re backed by top-tier VCs (like GV) and incredible angel investors (like Jeff Dean). Our team is a fantastic bunch (http://continua.ai/team) of accomplished engineers and researchers from Google, Disney, and several AI startups. We're pretty clued in on the technology side and have a strong vision of how the transformative technology of the last few years along with our own secret sauce (not just a ChatGPT wrapper) can help a huge number of people.

We’re hiring systems and ML engineers: https://jobs.ashbyhq.com/continua/

You'll work on building and improving the best LLM group chat experience there is, including fine-tuning models to boost conversational quality and improve scalability and identifying novel ways to build a "memory" which leads to a personalized and unique experience for our users. You understand what it means to work at a fast-moving startup.

Oh, and we maintain a vibrant blog, including items of technical interest, at http://blog.continua.ai/. Check it out! :)

Sage Bionetworks (https://sagebionetworks.org/) | Principal SWE | Java, Python, TypeScript, Node.js | Remote (US) | Full time

Sage Bionetworks, a nonprofit focused on open science and accelerating biomedical research, is hiring a Principal Backend Research Software Engineer (US-remote). We build platforms like Synapse.org that enable global scientific communities to responsibly share data and generate insights, and we value people who thrive in collaborative, interdisciplinary environments.

In this role, you’ll lead architecture and backend development across our platforms. You’ll have broad autonomy to shape system design, prototype new capabilities, and work closely with scientists and product teams on tools that support cloud-based data workflows, large-scale computation, and emerging AI/ML use cases. Strong production engineering experience, deep Java skills, and comfort with cloud environments, CI/CD practices, and containerized systems are key; interest in scientific or data-driven applications is a plus.

Full post: https://sagebionetworks.org/careers/software-engineer-backen... Email: Email is hidden

AllSpice.io | Senior Software Engineer (Automation / CI/CD) | Python/Go/TypeScript | Boston / San Francisco / REMOTE (US) | Full-time

AllSpice is building GitHub/GitLab + CI/CD + Copilot for hardware engineering teams (smart vehicles, rockets, robotics, medical devices, IoT). We recently raised our Series A and are hiring a senior engineer to own major components of AllSpice Actions, our automation engine for circuit design. Work spans backend (Go), Python automations, API integrations, and a Vue/TypeScript UI. You’ll help improve our platform, build integrations and help define hardware DevOps. Stack: Go, Python, TypeScript/Vue, Rust, Postgres, AWS, Docker Swarm, Terraform, GitHub Actions, Gitea. Hybrid in Boston/SF or Remote (US). Small, senior team; high ownership; salary + equity + full benefits.

Apply: https://allspice.io/careers

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Rippling | Actively hiring across SF, NY, or SEA| ONSITE/HYBRID (3 days M/Tu/Th, non-negotiable)| Base + Equity (RSUs), pay range included in all job posts Rippling (YC W17) is a unified workforce management platform. We bring together HR, IT, and Finance in a single system to help businesses manage all their operations—from payroll and benefits to computers and corporate cards—globally. We're rapidly expanding beyond workforce management and have other verticals in active development.

We value engineers who are energized by, and thrive in, a fast-paced, high ownership environment. We have many high priority roles open across the org. Right now we're making major investments in growing the Financial Products & Spend Management engineering vertical.

IC Roles SWE 2 - Financial Products (Toronto) - https://ats.rippling.com/rippling/jobs/844d2bdf-d672-46d9-a7... Senior Eng - Financial Products - https://ats.rippling.com/rippling/jobs/1f81bd71-a3b5-4b91-aa... Staff Eng - Global Payroll - https://ats.rippling.com/rippling/jobs/cf48e126-e063-4163-9f... Sr Staff Eng - Global Payroll - https://ats.rippling.com/rippling/jobs/d3c8bed0-d988-4765-b8...

Engineering Management: Eng Manager - Global Payroll (Toronto) - https://ats.rippling.com/rippling/jobs/e43448da-6a87-45b9-a9... Sr Eng Manager - Financial Platform - https://ats.rippling.com/rippling/jobs/a9658fef-88df-4dad-a4... Sr Director of Eng - Payroll Platform - https://ats.rippling.com/rippling/jobs/2d85be1f-9538-49d3-b1...

Rippling Careers Page - https://www.rippling.com/en-gb/careers/open-roles