Oscilar.com | Sr/Staff Software Engineers & PMs | REMOTE (US/Canada/Poland/UK) | Full-time

AI Risk Decisioning™ platform that helps organizations manage onboarding, fraud, credit, and compliance risks

Open roles:

- Sr./Staff Java Backend Engineer (North America/Europe)

- Sr./Staff Infrastructure Engineer (North America/Europe)

- Sr./Staff GenAI Engineer

- Sr./Staff JavaScript Web SDK Engineer & Frontend Engineer

- Sr./Staff Android SDK Engineer & iOS SDK Engineer

- Sr./Staff Data Scientist and Data Engineer

- Full-Stack Engineer - AI Agent Platform

- Product Manager for AI & RiskOps/Case Management

Apply at:

https://jobs.ashbyhq.com/oscilar?utm_source=HackerNews

Validity | https://www.validity.com/ | Boston - Remote (US) | Full-time

Validity is a suite of marketing tools used to ensure data quality, drive email performance, and provide advanced campaign analytics to leading brands.

Our Applications team is seeking a Senior Ruby on Rails developer to help expand our product line, improve our existing products, and build the next generation of Validity tools, continuing our mission to provide exceptional support to our growing customer base.

We're looking for someone with: - A strong command of Ruby, Ruby on Rails, JavaScript, and the architecture of large web applications at scale - Experience in taking projects from concept to completion - Strong communication skills; the ability to communicate clearly, effectively, and with empathy both within your team and cross-functionally - A proven track record of writing clean, maintainable, and well-tested code

Apply here: https://validity.applytojob.com/apply/9cSl8hGG4R/Sr-Software...

Plush (Remote – US/Canada) — Founding ML/Search Engineer — $180K–$200K + equity + healthcare

We’re an AI-powered fashion search and styling engine that understands taste — think a stylist that actually gets you. Launched June 2024, now at 25K MAUs and growing fast.

You’ll build the core of our personalization and search systems, combining LLMs, embeddings, and real-time fashion discovery.

We’re looking for someone who:

Has 4+ years of experience in machine learning, search, or recommendation systems

Is authorized to work in the U.S.

Has genuine curiosity about fashion and discovery

Contact: alyana@plush.shop

Location: Bratislava, Slovakia (comfortable with different time zones - partly overlapping etc.)

Remote: Yes

Willing to relocate: No

Technologies: HTML/CSS (SASS, Tailwind), JavaScript (Vanilla, jQuery, React, Next.js, React Native), PHP (WordPress custom theme development with Twig and ACF, Gutenberg editor/Core), Python (Backend/AI/Web Scraping), Web Accessibility, Git, Figma

Resume/CV: https://drive.google.com/file/d/19Lg7HblO1DD2OCfTt7wdk8rft4P...

Email: gio97niko@gmail.com

About me: Hi, I’m Giorgi — a Full-Stack Web Developer with around four years of experience in frontend development and about a year in backend and AI-related work. I’ve collaborated in various settings — from freelancing individually to working with teams in digital agency and startup — which helped me develop strong adaptability and teamwork skills. Most of my career has focused on building and maintaining WordPress websites (custom themes, ACF, Twig, Gutenberg), but over the past two years I’ve also been involved in React/Next.js projects. Recently, I’ve taken a growing interest in backend and AI development through my work at Onconest, an AI-powered health startup, where I contribute to both backend and AI implementation. I’m passionate about clean, accessible web experiences — over the last year, I’ve led accessibility improvements for large-scale projects in a US-based digital agency. I’m always eager to learn, improve, and take on new challenges where I can deliver results and make an impact.

Matcha.fm | Senior Software Engineer | $140K–$290K + Equity | REMOTE (US/Canada)

We're building AI agent systems that automate complex multi-step workflows.

Ship production code fast, own projects end-to-end.

Looking for 5+ years experience (or <5 with hackathon wins/founder experience/strong GitHub).

Strong TypeScript/React/Node.js required. Stack: TypeScript, React, Node.js, GraphQL, PostgreSQL, AWS (ECS, RDS, Kafka, ES), Docker, Terraform. Full type safety, monorepo, 100% IaC, per-PR staging environments.

Remote US/Canada/EU if US timezone

Apply: https://matcha.fm/apply/se

Alloy Health: E-Commerce Platform Engineer - Brazil or Columbia (Remote)

Alloy Health is a leading digital health platform providing women with expert, personalized care for perimenopause and menopause. We connect women nationwide with menopause-trained physicians and trusted solutions that support their health, confidence, and well-being.

We’re hiring an E-commerce Platform Engineer to build and optimize the systems behind Alloy’s online customer experience. You’ll develop integrations, services, and platform capabilities that improve conversion, personalization, and growth across our e-commerce ecosystem.

Experience: -Strong proficiency in Node.js and TypeScript, with a proven record of building scalable integrations and services that drive revenue and commerce efficiency. -Deep, hands-on experience with e-commerce platforms (Shopify, commercetools, or similar) and understanding of key metrics (CAC, LTV, conversion rates, attribution models).

Link to apply: https://adr.to/lunywai or email me at joe dot epg at myalloy dot com

CEF AI | AI Innovator & Principal Software Engineer | Full Time | San Francisco (hybrid, remote-first) | AI Innovator: $100k–$200k + equity | Principal SWE: $80k–$150k + equity | AI Innovator: https://linkly.link/2KOOz | Principal SWE: https://linkly.link/2KOP6

CEF AI builds an AI-first data automation platform for secure, decentralized orchestration of agents that compute directly on encrypted data streams. We’re shipping original systems (not wrappers), with multiple tuned models (CV, NLP, LLMs) and a next-gen multi-agent data infrastructure. Small team, high ownership, low bureaucracy.

What you’ll do

AI Innovator: Prototype and ship production AI features fast; extend our multi-agent orchestration; design private/sovereign data pipelines and dynamic indexing; collaborate tightly with founders to turn research into product.

Principal SWE: Own core platform architecture; design and scale distributed backends/APIs; build great DX (SDKs/CLI); lead reviews/mentorship; drive 0→1 projects with strong reliability and observability.

You might be a fit if you have

A track record taking systems from concept to scale and to revenue.

Deep backend/systems skill (Go/Rust/Kotlin or similar); strong CI/CD/testing discipline.

Experience with distributed, real-time data infra; privacy/security minded.

Hands-on AI product chops (CV, NLP, LLMs/agents) and bias to build/iterate quickly.

Clear communication, product intuition, and comfort working directly with founders.

Apply via the role links above.

Deputy Director of AI Engineering | Ministry of Justice, UK Government | London/Cardiff

Help lead a world-class engineering team, delivering meaningful change across prisons, probation and the courts. Learn more and apply here - https://jobs.justice.gov.uk/careers/JobDetail/11367-Deputy-D....

Any questions, ping francis.webb1 (at) justice dot gov dot uk

Tufalabs | COO & Senior research/engineers | Full Time | Zurich, Onsite | 100-130k CHF | https://tufalabs.ai/

Tufalabs is an independent AI research lab in Zurich, focused on high-impact academic-style AI research and large-scale LLM development. We care about compute (currently, 6× DGX B200, 2× NVL72 GB200 incoming). Our mission is to push the frontier of AI science while open-sourcing results and building the engineering muscle to pre- and post-train cutting-edge language models. The ultimate goal is automating AI research, while keeping in mind AI alignment and safety. The ultimate goal is to make sure AI goes well for humanity.

I am looking for a COO to help scale from ~10 to ~15 people.

Ideally you care about AI research, you are excited about the idea of helping us move faster, you like to keep red-tape low, you are a technical person who can create automated processes, and have experience owning and running operations at a startup.

We are also open to senior engineers and researchers, comp negotiable

If interested, email me at benjamin at tufalabs.ai

HomeVision | Multiple Roles - Eng, SRE, Analytics | Hybrid SF & Remote | Full-Time | $100k-$220k + equity

We have three open roles:

- Engineer - Hybrid SFO I'm looking for an junior-to-senior software engineer to work with me (CTO) directly. Our systems process millions of pages of documents a month for the mortgage industry. We work with some of the largest lenders in the country and are at the forefront of applying LLMs and other multi-modal models in this industry.

New-grad and junior engineers particularly encouraged to apply. Looking for people who are motivated to write good code with a good mix of practicality and aesthetics.

- SRE - US Remote (SFO or Seattle preferred) - This is a broad role on the platform team including AWS infra w/terraform, software engineering, and IT

- Analytics Engineer - US Remote (SFO or Seattle preferred) - Another broad role that includes managing the data warehouse, building durable and ad-hoc reports in sql and python, and doing deep analysis.

Please apply here: https://jobs.ashbyhq.com/homevision/a3f79d43-5d9e-46bf-a43f-...

Ditto | Product Designer | Remote (US/Canada) | $140-200K + early team member equity

Ditto helps teams manage their copy from design to production with a single source of truth. Over 3600 teams (from Fortune 500 companies to startups!) currently use Ditto.

We're hiring our second product designer to help to define and design our core product, from strategy to execution. As the second designer on our team, you’ll have an outsized impact on defining not only what Ditto is and how it works, but what we do next.

Ditto is a design-driven company. Our design function has high ownership around identifying and shaping problem spaces, exploring solutions, and helping to drive implementation. We don’t have a product function—instead, both design and engineering own the product lens. We think this is critical for Ditto’s product, which used by design and engineering teams in their day-by-day workflows.

More info and to apply: https://www.dittowords.com/careers/product-designer

ComfyUI | Founding Technical Recruiter | Full-Time | On-site (San Francisco) | $150K – $250K + Equity ComfyUI is a creative AI startup helping designers and engineers build next-generation visual tools powered by generative models. We’re a small (12-person) team growing fast and backed by top investors. Role: Own recruiting end-to-end — design interview loops, implement ATS and recruiting ops, and hire world-class engineers, designers, and GTM talent. Partner directly with founders to shape our team and culture as we scale from 0 → 1. Requirements: • 5 + years recruiting for VC-backed or hyper-growth startups • Experience building systems/processes, not just filling reqs • Comfort operating independently and collaborating closely with leadership Compensation: $150K – $250K + equity Location: San Francisco (on-site 5 days/week) How to apply: Email admin@recruiterephy.com with subject line “HN - Founding Recruiter” and include a short intro or your LinkedIn/resume (PDF).

Nexufend | UX/UI Frontend designer + developer | Hybrid/REMOTE Europe (within 5h travel time to VIE)

Nexufend is revolutionizing enterprise network security with a groundbreaking distributed firewall that provides process-level visibility. Founded by entrepreneurs who built Safing (4th fastest-growing open-source startup in 2022), we're scaling our B2B security platform.

We're seeking a User Experience and Interface Developer to craft intuitive interfaces for our network security platform. You'll work across our Dashboard UI (Svelte), Grafana integration (React), and supportive components, transforming complex security data into accessible, user-friendly experiences. Working directly with our CTO, you'll have significant creative freedom to shape how IT administrators interact with cutting-edge security technology.

https://join.com/companies/nexufendcom/15097623-ux-ui-fronte...

PrecisionBiome- Top 3 Young European Companies of 2025| Top 0.1% Founding Full-Stack Engineer | Munich/Berlin (onsite) | Full-time | Visa OK

PrecisionBiome builds personalized gut-microbiome therapies to eradicate chronic disease. Bootstrapped → post-revenue; recognized among the Top 3 young European companies by the European Commission. We’re now scaling the platform.

Role Own the full stack that connects lab data → models → patient/clinician outcomes.

-Strength in one or more of: data pipelines, distributed systems, ML in prod, privacy/compliance

-Low-ego, high-bandwidth, truth-seeking mindset

-->How we work Builder pact. Ownership > hierarchy. Fast feedback, high agency.

Compensation -Salary + meaningful equity. Sponsorship available for exceptional candidates.

Start ASAP · Onsite in Munich or Berlin.

Email talents@precisionbiome.eu —-->or book a quick intro with the founder: https://calendly.com/m-wessely-precisionbiome/call-w-moritz

Let’s build the future of hyper-personalized health.

ko-br | Computer Vision, Imitation Learning, Reinforcement Learning Researchers & Engineers | https://ko-br.com | REMOTE (Globally)

We build Physical AI models deployable today in warehouses to solve mundane tasks like palletizing. Our tech lets robotic arms adapt to mixed SKUs, grip slips, and chaotic environments in real time.

Have a read through our manifesto: https://ko-br.com/manifesto

We want you if You solve problems like an owner (no ego, no blockers). Don’t say "it won’t work." Try it. Validate it. Ship it.

Engineering roles:

  — You're hands-on, no theory, just building
  — Experienced engineer? Great! Recent grad/PhD? Don't get discouraged, apply if you're itching to ship real products

  — Generous base + equity
  — Work with state-of-the-art AI and real robots (UR/ABB/KUKA/FANUC).
  — Build tech that solves valuable problems today.

https://www.linkedin.com/in/ahmadbaracat

Apply: https://ko-br.com/careers

Qweebi | Senior Backend Engineer | Remote (IST ±3) | Full-Time

Qweebi is building the world’s first Virtual Makerspace — a 3D online platform where K–12 students can collaborate in real time to design, build, and test high-fidelity Robotics, Engineering, and Electronics projects.

We’re looking for a Senior Backend Engineer to own backend systems, scale infra, and ship AI-powered features. You’ll architect distributed systems, optimize perf/latency, evolve CI/CD, and help us support thousands of concurrent student sessions.

Please apply on: https://careers.qweebi.com/jobs/Gw1ihJushe4x/senior-backend-...

Duranta | https://www.getduranta.com/ | Seattle, WA | ONSITE | Full-time

Roles: Computer Vision Engineer

We are building software to help lawn care professionals & landscapers design, sell and maintain beautiful spaces. Millions of acres a year are converted into urban dwelling spaces, and we want to help make them as beautiful and as ecologically friendly as possible.

Duranta was founded a little more than a year ago. We are well funded and are expanding our team. Join us, as our third CV/ML engineer and help lead Duranta's computer vision efforts. You'll work on foundational models for aerial imagery understanding, using one of the largest aerial datasets ever assembled, and: Collaborate with the founders and a world-class CV/ML advisor to push the limits of aerial image understanding Architect scalable training & inference pipelines Build and refine models for fine-grained semantic and instance segmentation Drive experimentation and infrastructure for rapid iteration Help define our CV roadmap—from model architecture to dataset strategy to active learning

Stack: Python, PyTorch, Mask2Former, SwinV2, AWS, W&B

If you're interested in working with us, please apply online. Mention you're from HN and let us know why Duranta is of interest and what you've been working on lately.

Please apply on: https://jobs.lever.co/getduranta

Compass IoT | https://www.compassiot.com.au | ONSITE with Flex (Sydney, AU) | $130-180k AUD

Compass is hiring a full-time front-end developer.

I'm Emily, one of the founders. We are a multi-award-winning start-up that uses connected vehicle data to help transport professionals build better, safer, cities across ANZ, the UK, and USA. This includes B2B and B2G (gov). Notably, our dev team consists of ex-Canva, ex-Huawei, and ex-Agoda. We're bootstrapped, financially stable, and in our 7th year of operations.

The company is employee-owned and has a generous performance-based equity scheme. We value our company culture and work hard to provide meaningful career experiences for all staff, including projects that have changed the transport policy landscape in at least 3 different countries. We care about your experience at work and provide opportunities to grow and learn cool stuff. Our goal is to have a relatively small, motivated team of highly-paid, nice people who feel they are working on projects with tangible impact.

Requirements: - At least 3 years of experience. Ideally, your experience would be in front-end, but back-end development experience is also valuable. - Ideally, you would have some knowledge and/or experience in Typescript, React, State management (Jotai and MobX highly regarded), CSS Modules, Mapbox or similar. - Nice-to-haves include Async generators and promises, Protobuf, and GCP.

The role is onsite with flex; we ask new staff to come into the office during their first few months so that they get to know the team and the tech, but are open to more hybrid after the initial onboarding period.

We're a relatively small (25 people) team. We value people who are collaborative, problem solvers, flexible thinkers, take ownership over problems, and are do-ers who leave their ego at the door.

Other cool stuff: - Almost all Australian state govs use our software to improve roads and safety - We helped change the law in NZ around digital road pricing - We've won +7 different awards, including one from Google - We keep a well-stocked snack fridge and keep you caffeinated

Chuck us an email at directors@compassiot.com.au with a CV and github/project portfolio.

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. Here are some of our highest priority roles where you'll have an opportunity to make an out-sized impact in critical areas of the business.

Sr Staff Eng - Global Payroll - https://ats.rippling.com/rippling/jobs/631e8120-3e87-4cb2-80... Staff Eng - Platform - https://ats.rippling.com/rippling/jobs/354322cd-06fd-47f7-80... Senior FullStack Eng - Time Products - https://ats.rippling.com/rippling/jobs/db5da4b4-4882-459c-90...

Director of Eng - Infrastructure - https://ats.rippling.com/rippling/jobs/2f2ae4c8-ec56-4d1f-8f... Sr Eng Manager - Financial Platform - https://ats.rippling.com/rippling/jobs/a9658fef-88df-4dad-a4...

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

Radical AI | https://radical-ai.com | Multiple roles | NYC | Onsite, 5 days a week

Radical AI is a company (co-founded by Jorge Colindres, Joseph Krause, and Dr. Gerd Ceder) that's focused on changing the way materials are designed, developed, and discovered. Our goal is to build the full stack solution: from AI generated materials to autonomous, high-throughput experimentation, resulting in a new paradigm of scientific discovery that will unlock the next generation of materials that will change humanity for the better. We just raised a $60M seed round (3rd largest in NYC history) and are hiring for highly talented engineers as part of our efforts to revolutionize materials design & discovery.

Key roles:

- Senior Software Engineer - Lab Autonomy (https://jobs.lever.co/RadicalAI/2885cd8e-f208-4bbc-86c2-d7b4...)

- Senior Software Engineer - AI Systems/Agent (https://jobs.lever.co/RadicalAI/d5f1267c-82c6-43af-8e72-6f04...)

- DevOps Engineer - Platform (https://jobs.lever.co/RadicalAI/9891a086-713a-4dc0-a70f-c6f0...)

- Data Engineer - Platform (https://jobs.lever.co/RadicalAI/fdc7465f-a4e4-4b09-836e-7fe1...)

Feel free to apply using the links above or by shooting me an email w/ a resume + portfolio at vbafna@radical-ai.com