OCEANE | Quantitative Trader | Onsite | Abu Dhabi, UAE | Full-time | https://www.oceaneinvest.com/

OCEANE is a proprietary trading firm focused on ETFs and equities across GCC and global markets. We specialize in market making and quantitative strategies, powered by our in-house systems.

We're looking for a Quantitative Trader to join our Abu Dhabi team. You'll work closely with our engineers to develop, test, and execute intraday strategies across regional and international exchanges.

You should: Have 5+ years of experience in systematic or ETF trading. Comfort working in fast-paced environments with real capital. Understand market microstructure and trade execution dynamics. Have strong Python, C++, Rust skills for backtesting and prototyping. Want to be part of a small, ambitious team building from the ground up.

Please see the website for more details and contact info.

Fold | Remote (US Only) | Senior Frontend Engineer, Senior Design Engineer, Lead QA Engineer | Full-time Fold makes Bitcoin easy through great UX and rewards. We’re building the future of Bitcoin payments and need senior engineers to help us scale.

Senior Frontend Engineer – Work on our React Native apps, ship features and own architecture. • 5+ years exp, React Native, TypeScript, Expo • Bonus: Fold user, passion for Bitcoin

Senior Design Engineer – Build and scale our design system in React Native. • Strong in React Native, TypeScript, modern component libraries • Bonus: Storybook, Framer Motion, design system expertise

Lead QA Engineer – Own automation, quality strategy, and mobile release confidence. • 5+ years in QA, 2+ leading QA or owning strategy • Experience with iOs and Android automation, Maestro/Detox/Appium

Perks: competitive salary + equity, 401k match, unlimited PTO, full benefits, yearly vacation stipend, no Monday meetings, Bitcoin starter pack.

Email tiffany.sawhney (a) foldapp.com or apply here: https://ats.rippling.com/fold-inc/jobs More: https://foldapp.com

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 second 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

Ground Signal | Remote (US only) | Multiple Roles | Full Time | https://groundsignal.ai

Ground Signal uses social analytics and AI to help suppliers in the alcohol industry optimize sales. Our platform processes billions of records and delivers insights through a robust SaaS product used by top-tier analysts and global brands.

We're a fully remote team of 20+ distributed across the US. We care about capability over titles, value outcomes over process, and keep ego to a minimum. We collaborate tightly, move fast, and meet up in person a few times a year to recharge and plan together.

We are currently recruiting for the following positions. We are not able to sponsor at this time.

Software Engineer (Backend, Python, PostgreSQL, ClickHouse, dbt) https://wellfound.com/l/2bieql

Associate Data Engineer (Python, SQL) https://wellfound.com/l/2bteeq

Data Insights Engineer (Python, Jupyter, SQL) https://wellfound.com/l/2zf39a

Product Designer (UX/UI design for complex data/analytics) https://wellfound.com/l/2bn56j

Matroid | DL/AI/CV, Infra, WebApp, Field Software Engineer positions | San Francisco Bay Area (Palo Alto) | Full-Time | ONSITE

Matroid brings cutting edge computer vision to visual inspection, with a “no programming required” product that empowers businesses and industry to solve their unique inspection challenges.

We’re a rapidly growing Series B funded startup, with customers in the manufacturing and video security industries.

We’re looking for top engineers - both junior and senior - who are excited about solving hard problems in and alongside computer vision and productizing it to serve real-world use-cases.

$150K-$300K +equity, depending on role and expertise.

Tech stack includes:

Deep Learning / CV: Python, PyTorch Infra: Kubernetes, Kafka, Redis, AWS WebApp: React, Node, Mongo, Docker Apply at http://matroid.com/careers?source=hackernews

Chroma | ONSITE - San Francisco | Full-time | https://trychroma.com

Chroma is the open-source search and retrieval database for AI applications. It's an open-source database with vector, regex, and full-text search. We support local, single-node, and cloud hosting. Help build the future of context engineering!

We're a team of 17, all engineers today. We work in Rust, Python, Typescript, and Go.

We're hiring for these areas:

- Head of operations

- Product design

- Production engineering

- Platform engineer (Rust)

Apply here: https://jobs.ashbyhq.com/trychroma/9ed3aee8-07dd-44e3-9ca1-d...

More details at: https://careers.trychroma.com

Checkly | Multiple Roles | REMOTE (UTC +3 to UTC -3) | Full time | https://www.checklyhq.com/

Checkly helps engineers build reliable products by unifying testing, monitoring and observability. OpenTelemetry, Playwright, and Monitoring as Code are our foundation for unifying performance and reliability. In 2024, we raised $20M in Series B funding from Balderton, CRV, and Accel to take things to the next level.

-Senior/Staff UX Designer -Senior Backend Engineer -Staff Product Manager

See the full descriptions and apply here (and mention HN): https://jobs.ashbyhq.com/checkly?utm_source=hn

i’ve seen this role come up a few times over the past couple months, i applied a while back but didn’t hear back. Just curious, are you still reviewing applications, building a database for later, or do you usually just dismiss candidates without replying?

Harmony Intelligence | Mid-Senior Full-Stack Software Engineer | Remote (UTC 10pm-3am crossover) | $150k-250k + benefits + equity

I'm Alex, CTO & Co-Founder. We've just raised $3M to build a defensive AI AppSec agent to protect mission-critical software from AI cyberattacks.

You'll enjoy this role if you thrive on:

- Variety: building across the stack (mainly with Python), shaping product direction, prototyping new ideas

- Moving fast: we focus on impact, no micromanagement or politics

- Meaningful impact: on AI safety x cybersecurity

- Remote working: collab hours are best suited to APAC and North America + 2 destination offsites a year to connect

Compensation is quoted for US and AU respectively; local adjustments for other countries USA: $150k USD to $250k USD + comprehensive benefits package including health, dental, and vision insurance + equity Australia: $150k AUD to $250k AUD + superannuation + equity

Apply here https://www.harmonyintelligence.com/careers Read more here https://www.harmonyintelligence.com/harmony-raises-usd-3m-to...

Chestnut | Hiring multiple roles (across engineering) | San Francisco + Seattle hubs (hybrid) | https://jobs.ashbyhq.com/chestnut

Massive opp. Chestnut is the first AI-native operating system for insurance distribution management, tackling a $100B+ spend pool in the largest industry in the U.S. Legacy software and manual processes dominate this space; Chestnut is the only modern platform enabling real-time data, automation, and agentic AI workflows that directly grow carrier revenue.

Our stack: Go, TypeScript/React, Postgres, Temporal, K8s, Dagster, LLMs.

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We’re hiring:

** Forward Deployed Engineer – Work directly with customers to ship AI-powered workflows and integrations. https://jobs.ashbyhq.com/chestnut/5d4fd1ec-60f3-4669-a2d2-31...

** Senior Software Engineer – Build core services, event-driven systems, and automation layers that scale. https://jobs.ashbyhq.com/chestnut/fbbb7601-3d31-48b4-8639-75...

** Staff Software Engineer – Lead architecture and technical direction as we scale past enterprise workloads. https://jobs.ashbyhq.com/chestnut/f28c5ee5-12aa-4e7b-b0ea-f5...

** Engineer [Agent Orchestration] – Focus on applied systems: multi-agent coordination, workflow automation, retrieval, and tool use. Bridge research to production and design orchestration layers for enterprise reliability. https://jobs.ashbyhq.com/chestnut/075a0010-bfa5-489e-8808-e9...

** Engineer [ML + Agent Design] – Experiment with prompting, fine-tuning, and novel LLM techniques. Prototype new agent behaviors and push the boundaries of how models reason, interact, and automate in data-heavy domains. https://jobs.ashbyhq.com/chestnut/0b6e2b45-fab9-47f2-8f10-30...

We’re also hiring for Product & Commercial Lead and Data + Infra roles (details on the site).

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You'll work on the bleeding edge - embedding enterprise-grade agentic AI at scale. We're looking for engineers who thrive in fast-paced environments and want to make a meaningful impact.

More info + apply: https://jobs.ashbyhq.com/chestnut