LEGO | London (Farringdon) | Hybrid (3 days a week in the office)

* Lead engineer on the personalisation / recommendation engine

* Python, Node JS / TS, Databricks, Aurora RDS, AWS, API Gateway

* Experience required in both data engineering and software engineering

* Experience welcome in ML engineering and data science

I've worked on this team for a year or so now and it's fair to say that there's been no shortage of things to work on - you'll be immersed in the challenge of distributing personalised recommendations across the business and become a part of a company which adopts a lot of the nice danish working practices. The office culture is an important aspect of the business so 3 days a week is a needs-must. If this sounds like your bag - apply below:

https://www.lego.com/en-us/careers/job/lead-engineer-persona...

Senior Full-Stack Dev | React & PHP | $3.5k-5k/mo | REMOTE

We’re looking for a full-stack engineer with strong experience in React, PHP, and AWS to take technical ownership of a fast-growing product. You'll work on an HR/coding evaluation platform used by hundreds of companies across LATAM. This is a profitable, growing SaaS.

What we’re looking for: (1) Senior React & PHP developer; (2) Fluent with AI dev tools (Cursor, Claude Code); (3) Startup/SaaS experience or shipped your own products.

Compensation: $3.5k-5k/mo on a B2B contract, depending on experience and fit. Other details: Remote, full-time, 3 short meetings/week, B2B contract, LATAM or Europe.

Apply here: https://airtable.com/appH4dOGEi6iiotOE/pagWpeEDUfb9dCMCI/for...

Founding Engineer – AI/Finance (Retail Trading Research & Strategy) - Remote or New York City

We are building an AI platform that empowers retail traders with institutional-grade research tools and real-time strategy guidance. As our first technical hire, you will own the full lifecycle from AI model research to production deployment. You will design and implement data pipelines for market, news, and sentiment feeds, fine-tune LLMs for financial reasoning, and ship features that help retail traders make smarter, faster decisions with hedge-fund-level tooling. You will collaborate directly with AI researchers, engineers, traders, and quants from top institutions to bring financial intelligence to the retail trading world.

Minimal Qualifications Proficiency in Python and modern ML/AI frameworks (e.g., PyTorch, JAX) Hands-on experience with LLMs, transformers, time-series modeling, or AI agents Strong understanding of cloud infrastructure (AWS/GCP), scalable API development, and data engineering pipelines Proven ability to take projects from initial concept to production deployment Master’s or PhD in Computer Science, Mathematics, or Physics (in progress acceptable), or a Bachelor’s degree with a proven track record of work supported by a GitHub

What We’re Looking For AI/ML Expertise – Proven experience with LLMs, transformers, or other foundation models Cloud & Infrastructure Skills – Proficiency in the Python ML stack, scalable API development, and cloud platforms such as AWS or GCP End-to-End Ownership – Ability to take projects from concept through production deployment Research Mindset – Experience implementing state-of-the-art AI methods and conducting research in ML/AI

Nice to Have Publications in ML/AI conferences (NeurIPS, ICML, ICLR, ACL, CVPR, etc.) Trade strategy generation and backtesting experience Interest in trading and understanding of retail workflows across stocks, crypto, and futures Familiarity with brokerage APIs (Interactive Brokers, Alpaca, etc.) Knowledge of options strategies, risk management, and portfolio optimization The drive, creativity, and technical depth to be that “cracked” engineer

Email Resumes/GitHub: alexyskoutnev@gmail.com

Nevoya - Senior Frontend Developer & Backend/Full Stack Developer – SF Onsite

About Nevoya: Nevoya is North America's leading next-generation electric trucking carrier, transforming logistics through AI-native operations and relentless customer focus. The company builds and uses proprietary technology to deliver zero-emissions carrier services to Fortune 500 shippers with superior economics and service to legacy diesel operators. The company has offices in California and Texas, and is backed by globally-renowned investors including Lowercarbon Capital.

Open Roles: Senior Frontend Developer Location: San Francisco Onsite We're building North America's first all-electric truckload carrier, powered by AI and proprietary logistics tech. As our Senior Frontend Developer, you'll lead UI development for Apollo, our in-house logistics platform. Expect complex interfaces, maps, and workflows that drive real-world operations. Tech: React, TypeScript, TanStack, FastAPI You: 5+ years in frontend, strong with design systems, state management, and performance. Logistics or mapping experience is a plus. Join a fast-moving team solving big problems with big impact. Competitive pay, low-ego culture, high ownership. Apply Here: https://jobs.ashbyhq.com/nevoya/b35a83ec-6f35-44e4-9f2e-de83... Backend / Full Stack Developer Location: San Francisco Onsite We're building the backbone of electric freight. As our Backend/Full Stack Engineer, you'll own the systems that power real-time dispatch, routing, and telemetry. Tech: Python, FastAPI, PostgreSQL, AWS, Docker You: 5+ years backend experience, strong in APIs, data modeling, and systems architecture. Full-stack skills or logistics experience a bonus. Build from the ground up in a fast-scaling, mission-driven company. High ownership, high impact, no fluff. Apply Here: https://jobs.ashbyhq.com/nevoya/b16ae1cc-6c38-4697-84d0-be94...

Senior Go Engineer (Fully Remote) – Full-Time, High-Impact Role Company: Centrum-AI Location: Worldwide, Remote Tech Stack: Golang, AWS, GCP, Azure, Docker, Kubernetes, cloud-native architectures and microservices. Salary range: 70k - 120k

Help us build the future of supply chain intelligence.

We're a small, fast-moving team building a next-generation supply chain AI platform. As a startup, we prioritize development speed and iteration. Creating solid and clean building blocks while delivering meaningful features is top of mind right now. We're well-funded and backed by prominent investors, founded by serial entrepreneurs who've previously raised hundreds of millions and built category-defining companies.

You Should Have

- 5-10 years of backend development experience - Strong Go programming skills (minimum 2+ years preferred) - Proven experience with AWS, GCP, and Azure — not just one cloud provider - Deep understanding of cloud-native architectures and microservices - Hands-on DevOps experience (Docker, Kubernetes, Pulumi, etc.) - Security-first mindset with understanding of compliance frameworks - Self-driven approach with ability to own projects end-to-end - Experience shipping production systems that scale

To Apply: https://www.careers-page.com/centrum-ai/job/63W367VW

Risiq GmbH | Backend Engineer (Python) | Hybrid Mannheim, Germany (onsite 1x/month) | €55k–€85k | Full-time or part-time We help banks and financial institutions streamline risk management, ensure regulatory compliance, and cut costs with our platform Ribeca. Small, agile team (6–8 devs) working with Python, FastAPI, AWS, and Docker.

Role: Build and extend backend services, integrate AWS, automate deployments, write tests, and develop ESG/regulatory features. You: 3–5+ years backend experience, fluent German, AWS/Docker familiarity, agile mindset. Benefits: Flexible hours, workation, 30 vacation days, budget for training, free choice of hardware.

Apply: info@risiq.de — subject “Python Backend Engineer — YC”

Poe.com | Staff Security Engineer (Python) | REMOTE: US/Canada/Ireland/UK) | Full-time

About us: Poe is a a16z backed product. Gives you access to the best AI from many different companies in a single interface across all of your devices. ChatGPT, Claude 3.7 Sonnet, DeepSeek R1, many of the top image, video, and audio generation models, and millions of user-created bots are all on Poe.

Stack: Python, React, Typescript, Next.js, GraphQL, Docker, K8, AWS.

Compensation (location dependent): For US: $155-$265k USD + equity / For Canada:$185-270k CAD + equity.

What We’re Looking For: You will be a key member of the newly formed Security Engineering Team, with a mission to keep Quora/Poe safe from security problems by building robust protections around our products, infrastructure and people. Our small engineering team works on challenging problems every day. We have a culture that's rooted in constantly learning and improving, and our engineers are encouraged to think big and experiment with new ideas.

Timezones: 9am to 3pm PST.

Apply below: Staff Product Security:https://jobs.ashbyhq.com/quora/e888eecc-678f-4eeb-bb5f-5ca70...

Staff Infrastructure Security: https://jobs.ashbyhq.com/quora/b808dfbe-4d0d-4077-b88c-cdd7f...

Camber fka Juniper (YC W21) | Senior Software Engineer (Product, Backend, Data, platform | Engineering Manager | Full-time | Hybrid NYC | camber.health

Camber is working to improve the messy financial infrastructure for US Healthcare. We've built an automated end-to-end insurance billing system for recurring care, starting with Autism clinics. It’s a product that clinicians need and love.

We automate and abstract the tedious, manual, repetitive work that goes into the administrative duties of running a clinic, so that clinicians can do what they do best — providing care.

It starts with ingesting clinic data, and then create, validates, and submits claims to insurance providers across the country. If claims need corrections or appeals, most of the time we can handle those automatically or our CX and Operations team use our in-house internal tools. We also handle patient invoicing for co-pays, co-insurance, and deductibles (we never send anything to collections). We track money movement on a unified ledger and reconcile transactions with clinics' bank accounts.

There is so much more to build. If you're interested in scaling data pipelines, programmable rules engines, AI, data science, delightful products for small clinics, processing billions of dollars in money movement or solving the unsexy problems that make this country's healthcare broken, come join us!

We are a team of ~50 with strong product market fit. You’ll be working with an engineering leadership team from AWS and Stripe to get clinicians back to work delivering care for kids.

Email us at jade@juniperplatform.com or apply at camber.health/careers

Kaedim | Software Engineer, Machine Learning Engineer, Customer Support Engineer, Product Manager, Founding Recruiter | Onsite | Full-time | San Francisco, Singapore, London | US & UK Sponsorship Available Kaedim is an AI startup building ML algorithms that turn images into digital 3d models. We are a group of ~10 looking to grow the team to help streamline 3d content creation for 3d artists and are already working with 1 of the top 10 games of all time! Using our AI and in-house art team, we have the most accurate, game-ready 2d → 3d asset generation pipeline. Currently, we are offering a 10x speed up to 3D asset creation pipelines of 200+ game developers and we are working with partners like Voodoo, Upland, Azra Games.

Check out our demo here: https://www.youtube.com/watch?v=tlQWFG1DLb0

Job descriptions and application link: https://join-kaedim.notion.site/

Tech Stack:

Product (web app, API): React, MySQL, NodeJS, Python, AWS

Machine Learning: Python, PyTorch, AWS

Roger Healthcare | ONSITE / Hybrid / REMOTE | San Francisco | Senior/Staff Backend Engineer & Junior Backend Engineer | Full-time

Build AI tools that give clinicians their evenings back. We’re creating AI-powered clinical documentation for home-based care, improving elder care nationwide. Backed by top investors, profitable in year one, and growing faster than anyone in our space.

Team: Founders are AI researchers from Cornell and Amazon Alexa, shipping new LLM + real-time voice products constantly.

Roles & Compensation

Senior/Staff Backend: $170K–$230K + 0.15%–0.3% equity

Junior Backend: $140K–$180K + equity

  What You’ll Do

   Build backend infra & APIs for AI-powered voice/documentation tools

   Ship 0→1 features with FastAPI, MongoDB/Postgres, Docker, AWS

   Work with LLMs + fine-tuned AI for voice, text, and vision

Senior: Lead as an IC, mentor juniors, define scalable infra

Junior: Collaborate with senior engineers, grow through mentorship

Email: rayyan@rogerhealthcare.com

Apply: rogerhealthcare.com/careers

Memorang (AI-powered EdTech stack) | Full-Time | Remote

Our mission: Build the AI stack for education—an agentic framework to launch, monetize, and power learning apps 50× faster. We bootstrapped to profitability, were voted #1 among 1,500 in the Vercel AI Accelerator, and collectively reach tens of millions of learners.

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Open Roles:

Full-Stack Engineers: Work on mission-critical, rapid POCs to MVPs using TypeScript, React/Next.js, AWS Lambda, Postgres, and Neo4j. Help shape infrastructure and UI for bleeding-edge AI-powered features.

Senior AI Agents Engineers: Own modular agent architecture, RAG pipelines, and LangGraph-based systems in TypeScript/Node.js. Architect reasoning layers, agent memory, and performance tuning for intelligent learning agents.

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Why Memorang?

Remote-first, async-friendly team with flexible hours

Health & wellness stipends, home-office support, paid time off

Opportunity to ship systems used by millions—at a built-for-speed profitable startup.

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

Or email careers@memorang.com with your CV, a short note (1–3 sentences) about which role excites you and why, and a link to your best project or portfolio.

Looking forward to seeing who’s inspired by shaping the future of learning.

MLtwist is a technology that focuses on the data prep and training for unstructured ai data. We're looking for a lead developer to join us on infrastructure. Data collection & tagging is projected to be a $17b opportunity, a lot of companies want help getting their data ai ready in a way they trust that gives solid quality. We care a lot and our customers are amazing, check out our site: https://mltwist.com/news/

* Scalable and tolerant systems using Kubernetes, Docker, and cloud infrastructure (GCP) * React, NextJS, PostgreSQL, Docker, Python, Javascript/Typescript. * Infrastructure: GCP/AWS, (Cloud Storage), running containers in production (Kubernetes, GCP GKE, GCP Cloud Run, AWS ECS, AWS EKS, AWS Fargate).

Stoke | Bellevue, WA | ONSITE (hybrid)

Stoke is a 5-month-old startup (founded in Feb 2025 by insuretech veterans with $4B+ in previous exits across 2 bootstrapped companies) building real-time Voice AI agents to make insurance purchases easier, faster, and more affordable.

PROBLEM: Insurance is a critical product, and the current system is broken. Policies are the main shield between American households and financial ruin. At 5% of income, it’s the fourth largest household expense after housing, transportation, and food. The majority of people have insufficient coverage and are paying too much for it. This is primarily driven by human agents who frequently have insufficient expertise and are driven by ~$200B a year in perverse incentives. Customers eat the costs of all of this through higher premiums.

SOLUTION: AI agents that enable personalized, unbiased, expert product recommendations at scale and at a fraction of the cost. We can simultaneously raise the bar of service while stripping out unnecessary costs, delivering those savings directly back to consumers in the form of lower premiums.

TEAM: 5 engineers (ex-Facebook, NYT, ScaleAI, AssuranceIQ), growing fast.

HIRING: Founding principal engineers/leaders with expertise in distributed systems, infra, real-time pipelines, agentic AI.

TASK: Shape architecture (AWS, Kafka, Python, Kubernetes, WebRTC); scale for 1000s of concurrent calls under 400ms latency; mentor as we hit 50+ engineers; directly help families save on premiums.

YOU: Obsess over reliable code, solve tough problems, ship fast, explain concepts clearly, learn quickly.

PERKS: Competitive salary/equity, full benefits, top tools, encouraged recharge time, quarterly retreats (hackathon + vacation).

Email Kyle Moseley: kyle@stoke.com with resume and why Stoke.

EquipmentShare | Staff Software Engineer | Remote (US) | Full-Time | https://equipmentshare.com/careers

We’re building tools that power the physical world — from IoT-enabled fleet tracking to real-time logistics coordination. Our platform supports a $1.4B+ heavy equipment network and growing fast.

Role: You’ll lead the design and implementation of scalable, distributed systems and backend services. Collaborate cross-functionally with product, infra, and field ops teams. Mentor other engineers and set technical direction through code, design reviews, and pragmatic architecture.

Tech: TypeScript, Node.js, React, PostgreSQL, Kafka, Kubernetes, AWS.

You might be a fit if you:

Have 8+ years of experience and operate at Staff scope

Enjoy solving messy real-world problems, not just tech-for-tech’s sake

Can navigate ambiguity, influence system direction, and mentor other engineers

Care about delivering outcomes, not just shipping features

This is a remote-first role with competitive salary, equity, and real ownership. At this time, we are not able to provide sponsorship.

Apply → mike.goodman@equipmentshare.com

Trunk | https://trunk.io | DevRel Engineer - Remote US or Canada| Staff Full Stack Engineer - San Francisco

Trunk is an a16z funded dev tools startup, redefining software development at scale. We aim to solve problems that developers hate by bringing the tools usually built in-house at the best engineering orgs to every development team. Some of our products:

  * Merge Queue: a merge queue, to ensure that PRs are tested in order before they're merged.

  *Flaky Tests: Detect and eliminate Flaky Tests.

  * AI DevOps Assistant: Automate Reccurring DevOps tasks in chat.

In 2022, we raised a $25M Series A led by Initialized Capital (Garry Tan) and a16z (Peter Levine)

Our tech stack:

  * Frontend: Typescript, React, Redux, Next.js
  * Backend: Typescript, Node, AWS, CDK, k8s, gRPC
  * Observability: Prometheus, Grafana, Kiali, Jaeger
  * CLI: C++20, Bazel
  * VSCode Extension: Typescript
  * CI/CD: GitHub Actions
  * General: GitHub, Slack, Linear, Slite

Unlimited PTO (and we all actually take PTO), competitive salary and equity packages! Please apply here: https://trunk.io/jobs

JotPsych (https://jotpsych.com) | Hybrid (DC Area) | Full-Time | Roles: (1)Senior Frontend Engineer (2)Senior Backend Engineer | $5m Seed Round

JotPsych is a behavioral health AI scribe tool and we're looking for frontend and backend engineers as we build the first agentic EHR for behavioral health. We're looking to hire ASAP! More info in the links below:

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Senior Frontend Engineer: https://jotpsych.notion.site/We-re-hiring-Senior-Frontend-En...

Looking for engineers that are strong with Redux Toolkit (RTK) & RTK Query, comfortable reasoning about client‑side caching & invalidation.

- Cash (~$150-250k) - Material equity (~0.75%)

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Senior Backend Engineer: https://jotpsych.notion.site/We-re-hiring-Senior-Backend-Eng...

Looking for engineers that are fluent with Python (FastAPI, Celery), SQL & NoSQL schema design, AWS primitives.

- Cash (~$150-250k) - Material equity (~0.75%)

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Portal Innovations, Stargaze | Product Engineer (Part-Time, Chicago) 20 hrs/week | AI + biotech

Portal Innovations is a life sciences venture platform building tools to surface high-potential science and researchers. We’re hiring a part-time Product Engineer (20 hrs/week, Chicago only) to extend Stargaze, our AI-driven innovation discovery toolkit.

Tech stack: Python, Postgres, React, AWS, Modal, Airflow Role: Backend + front-end development, new feature buildout, infrastructure support You: Comfortable across the stack. Energized by the idea of building software for scientists, within a venture platform. (See link below) Own your work and can work independently while collaborating with non-technical stakeholders.

Bonus: Role could grow into full-time for the right person.

More about Stargaze: https://innoeco.substack.com/p/0d1352cf-b4d4-4cfa-8b09-e0964... To apply: steven.lehmann@portalinnovations.com

Zeven | Senior Backend Developer | ONSITE in Zurich (Switzerland) | Full-time | Competitive salary + stock options We're a newly-founded and well-funded startup that is seeking to revolutionize the sports industry with AI-powered solutions. Our mission is to unlock human potential and redefine the sports experience through innovation and technology.

We are looking for an experienced Senior Backend Developer and sports enthusiast to join our on-site team in Zurich, Switzerland. This is a hands-on, high impact role. We use Typescript for web, Python for ML, PostgreSQL, React + TanStack, AWS and SST.

Please see the Full Job Description [https://tinyurl.run/zeven] for requirements and more details about our Tech Stack.

We are offering full-time employment with a competitive package:

• Competitive salary and stock options.

• Pension plan bonus and 25 days of paid vacation plus public holidays.

• Charming office next to the lake of Zurich with fully-equipped kitchen.

• Top-notch equipment (MacBook Pro laptops, standing desks, etc.).

• We love to organize company outings and sport events.

If you're a motivated and experienced backend engineer who is crazy about sports and looking for a new challenge, we'd love to hear from you! Please email CVs to alex@zeven.ai

We do not consider remote candidates, agencies and candidates located outside the EU/UK/EEA/Switzerland

Journee | Berlin, Germany, Europe | REMOTE (CET +/- 2h) | Full-time | https://journee.ai

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Journee is an independent technology company founded in 2020. We are recognized for our award-winning work with internationally renowned brands such as BMW, H&M, and Siemens. We delivered all our projects thanks to our in-house streaming and GPU fleet orchestration technologies.

We are now building and launching Ojin, a real-time generative AI platform for developers. Ojin extends our core technologies to serve the growing demand for interactive real-time AI applications. For this new venture, we are building a small, ambitious team and are hiring for the following positions:

* Cloud Infrastructure Engineer (Lead or Senior)

* Machine Learning Engineer (Senior)

* Software Engineer (full-stack or backend focus, Senior)

Apply via our Careers page: https://www.journee.ai/en/career/

Our tech stack: TypeScript, Python, Go, AWS, Infrastructure as Code, React, Unreal Engine, WebRTC

ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity ThreatMark protects >50M end users from finacial fraud and saves > $100M every year in losses. We are working with top banks in EU and US to protect their end users.

We develop large-behavioral models that recognizes returning users by their mouse movements, keystroke timings and sensoric data (accelerometer, gyroscope). We detect cyberthreats (e.g. malware, phishing, scraping) by exploiting browsers/sandboxes of devices. We manage ~PB scale of data and provide realtime scoring in milliseconds driving authentication/authorization flow (2nd factor).

Stack: [python, typescript, rust], [redis, postgresql], [aws, terraform] ...

We are looking for exceptional engineers to build with us and be part of the success:

- Research Team Lead [hands-on role] (leading world-class ML engineers to success - focus, context translation, project management, measurement, ...)

- Engineering Team Lead [hands-on role] (structure, organize, help, elevate) - lead of team dealing with backend - low tail latencies, distributed systems, petascale

- DevSecOps Engineer (blue team - designing, implementing secure infrastructure)

- Product Manager (self driven, tech-enabled go-getter - expert on fraud and/or scaling a startup from product perspective)

- DevOps Engineer (IaaC in AWS)

We are also looking for other key roles:

- Chief Revenue Officer - be responsible for growth in US & EU

If you are interested, please email us @ career@threatmark.com with subject "HN Who's Hiring" If you don't find the right role here or at https://www.threatmark.com/careers/, write us anyway if you believe you can be good fit :)

Krystof Hilar, Co-Founder & CTO