SIG | Multiple Positions | SYDNEY, AUSTRALIA | Visa Sponsorship for Experienced / PhD Candidates | On Site | https://sig.com

SIG is a global quantitative trading firm founded with an entrepreneurial mindset and a rigorous analytical approach to decision making. As one of the largest proprietary trading firms in the world we are experts in trading all listed financial products and asset classes handling millions of transactions on exchanges around the world every day.

SYDNEY:

Quantitative Systematic Trader

Quantitative Researcher

C# Developer (Post Trade Technology)

C++ Developer

Pricing Developer (C#, Python)

Python Developer

Application Support Engineer

Technical Analyst - AI

If you have not previously applied please send me your CV (email in the profile). We had few great YC hires already in the past. Contact number, visa/work rights, availability and a brief description of your current situation is useful to include.

Halfpricesoft | Founding Engineer | Berkeley, CA | ONSITE | $175k - $210k + Equity

Halfpricesoft has quietly dominated the small business payroll and tax compliance space for 20 years. We are a profitable, bootstrapped company with thousands of customers and a massive track record of stability.

We are entering a new era and transitioning our proven legacy solutions into a modern, cloud-native suite. We are looking for a Founding Engineer to serve as our technical partner in this expansion. You will report directly to the Founder, own the technical roadmap, and help build the team.

The Role:

Architect & Build: Lead the transition from legacy systems to a modern cloud architecture.

Infrastructure: Manage and scale our Kubernetes deployment.

Leadership: Set hiring standards and mentor future engineers.

Tech Stack: Python (Django), React, Kubernetes, Cloud-native.

Why join?

Real Impact: You aren't a cog in the machine; you are building the machine.

Stability + Upside: Competitive salary plus a Phantom Stock Plan with a transparent, revenue-based valuation formula (no VC dilution).

Autonomy: High-level ownership over the tech stack and product direction.

Apply here: https://www.halfpricesoft.com/career/founding-engineer/

Immunera | Principal Machine Learning Engineer | NYC area (hybrid) | Full-time | immunera.ai

Hey! I’m Maxim, cofounder/CEO of Immunera.

We're building blood tests that use gene sequencing and machine learning to help patients with autoimmune disease. Immunera spun out of years of research at Stanford, and our technology has been published in Science and covered by The New York Times.

We're hiring a Principal Machine Learning Engineer to shape the core models and infrastructure that power our blood tests. We are partnering with hospitals to generate training data from real patients for our language models and other biological sequence models.

This is a senior engineering role with significant autonomy at an early-stage, venture-backed startup. We're looking for strong experience building and operating ML systems in production (Python, PyTorch/TensorFlow, cloud platforms). Prior biology or healthcare experience is NOT required; we care much more about your ability to reason about data, models, and systems.

Full JD: https://www.immunera.ai/jobs

Contact: maxim@immunera.ai (subject: “HN ML job”)

Splash Tech| FE/Fullstack Mid-Senior/Senior | Remote( +-2 EU CET) | Full Time | https://splash.tech/

We’re a small UK-based free-to-play gaming company with a distributed EU team, growing fast after recent success and scaling our platform. We’re looking for a FE/Fullstack role, from mid-senior to senior engineer with at least 5+ years of experience.

Our engineers must be able to think product-first, and take a task from idea to production, work across the full cycle. You must write your own code, AI assistance is fine, but you must be able to produce all your work independently. We value clear thinking and communication, you should be comfortable sketching simple architecture or flow diagrams (boxes and lines, nothing formal) to explain your ideas.

You’ll also be asked to write SQL and some Java Controllers that access data. It’s ok if you don’t know Java, but our controllers are written in Java and you’ll need willingness to learn.

Our stack includes Java, Python, TypeScript, Angular, SQL.

To apply, please send an email to jack[at]splash.tech with the subject “FE/Fullstack Hackernews 2026”. Please send any git/bitbucket/source-forge project that represents your coding otherwise I’ll ask you to complete a small test project.

Fusionbox | Python + TypeScript Engineers | United States| Full-time | REMOTE (Legal to work in the US)

We're a software engineering consultancy that builds enterprise software the right way. We negotiate the right to open source all our client code, maintain a handful of popular libraries, and our engineers contribute to Django core. We sponsor PyCon, DjangoCon, and Django Girls because we're invested in the ecosystem we build on.

We're looking for software engineers who value software design, system architecture, and collaboration. You should be comfortable with about half of these areas and eager to learn the rest: web application security, relational database design (PostgreSQL, beyond "SELECT *..."), Django internals, React, and distributed systems. What you'll actually work on: complex state machines for financial workflows, multi-tenant architectures with row-level security, custom database functions when the ORM isn't enough, and React frontends that handle real-time data without being a mess of useEffect hooks.

We're a small team where you'll own features end-to-end (database design to React components) and have opportunities to shape technical decisions. You'll get paid to write source code with a team that practices empathy and values work-life balance. If you've ever wished your job involved more elegant state machines and fewer marketing landing pages, let's talk: info@fusionbox.com.

Level 12 | Full Stack Web Developer - Python, JavaScript, SQL | Mid-Level & Senior | REMOTE | SALARY:$95K-145K+ | https://www.level12.io/careers/

Level 12 is a software consulting and custom development agency. We have mid and senior level positions. Our job descriptions are written by developers for developers. No HR fluff here, we want you to know what you are really getting into:

https://www.level12.io/careers/

- We have a commitment to transparency and offer a "no surprises experience" throughout the interview and hiring process. We value candor...as evidenced by the length of our job description. :)

- Our CEO prefers the title CED, Chief Executive Developer. Engineering and operational concerns don't take a back seat when potential sales come to the front door.

- You will be working remote with a team that is all working remote and has been for years. Let's make the best use of our time by not commuting.

- We practice and preach sound development practices. You are likely to learn and grow as a developer while working here.

- You are committed to automated testing of all the software you write (our apps typically have 92%+ test coverage).

- We have a no-drama office policy. We value and cultivate enjoyable working relationships among team members. No jerks allowed!

- We emphasize work/life balance and adopt policies that make sure our people don't get burnt out. For instance, our PTO/Vacation policies are designed so that you actually use them.

- If you apply, we guarantee that we will give you a response, whether "yay" or "nay". No black holes here!

NOTE: our intent to hire is currently tentative but should be resolved one way or the other in the next couple weeks. So, if you are interested, read the job description but, for now, don't go through the entire application process unless you really want to. Just email me (the CEO) with a clean dad joke, or your take on Kirk vs Picard, and reference your interest: randy.syring@level12.io. I'll follow-up in a couple weeks when I know for sure if we are going to be taking applications.

Staff / Principal Product, Backend, Distributed Systems Engineers - Artemis — NYC

Hiring 7+ yr Staff/Principal engineers to own exabyte ingestion, streaming/federated analytics, and AI-native detection (product + infra) at our Stealth AI-security startup (seed $15M).

Stack: Python/Node/Rust, React/TS, Kafka, ClickHouse, AWS.

Ship end-to-end: design → prod → detection stories that customers use daily.

Prefer experience at scale (Google/Meta/AWS/Abnormal/Wiz) - we have a super experienced technical team.

Email christina@goartemis.ai + with CV + one line on what you’d own - I’ll reply personally.

Midpage | https://midpage.ai | Senior Software/Data Engineer | prefer NYC, open to remote | Full-time | $170-240k + equity

Midpage is seeking a senior engineer to help us catalog the world's legal data. Our dataset currently covers US case law and powers some of the largest law firms, legal technology platforms, and AI companies through our webapp, API, MCP, and custom data services. We're currently the only vendor openly widely selling this data in the US and customers appreciate that we have good citation linkages and a citator (indication of which judgments have been overruled/criticized).

We're looking to expand data coverage, adapt our infrastructure to our scaling enterprise needs, and find new ways to enrich our data offerings and delight our developer customers.

We're a team of 7, mostly in-office in lower Manhattan with a few remote/international teammates. Seeking a backend generalist with deep Python + Postgres experience who's ready to move quickly. Prefer NYC but flexible.

If interested email ben/dot/hoffner/dash/brodsky/at/midpage/dot/ai with HN in the subject.

Jurata | Software Engineer (Frontend/Fullstack) | Zurich, Switzerland | ONSITE | Full-time Jurata is a LegalTech startup building an online one-stop shop for legal, accounting, and tax services. We help thousands of SMEs get fast, affordable access to professional support. Heavy focus on automation and AI. We're looking for versatile engineers who thrive in a TypeScript environment and enjoy owning features end-to-end. What you'll do:

Build and maintain Next.js frontends Migrate legacy apps from no-code tools (WeWeb/Retool) Deliver fullstack features (backend: Nest.js, Python) Own problems from idea through release and monitoring

Stack: TypeScript, Next.js, Nest.js, Python, MongoDB, Vercel, AWS Looking for:

TypeScript and Next.js experience Strong eye for design (you can build beautiful UIs without a Figma file) You actively use AI coding tools (Cursor, Windsurf, etc.) Builder mindset, comfortable working autonomously

Benefits: 25 vacation days, ESOP, free gym membership, team lunches, central Zurich office with snacks and drinks. EU/EFTA citizenship required (or willingness to relocate to Zurich). Apply: https://join.com/companies/jurata/15604453-fullstack-softwar... (mention HN)

Apple | Full-Stack Software Engineer | San Diego, CA OR Sunnyvale, CA | ONSITE (3 days/week in office)

We are looking for a Full-Stack Software Engineer to join our team to design and build full-stack applications used by internal machine learning researchers. You'll collaborate with data collection, data processing, and ML & product engineers to help create the next generation of Apple products. We primarily use Python and Typescript. Email any questions to mlt-hiring "at" group.apple.com.

Apply: https://jobs.apple.com/en-us/details/200643395-3543/full-sta...

Encube Technologies | Senior & Lead Software Engineers Onsite (Stockholm) or Remote | Full-time

Encube Technologies is building collaborative, real-time software for manufacturing. We are looking for experienced engineers to help shape the core of the product.

You will work on challenging problems at the intersection of browser-based 3D rendering, CAD compute algorithms, and real-time collaboration, with a strong focus on end users and performance. This is hands-on, product-driven engineering with significant technical depth.

What you will work on - High-performance, browser-based 3D rendering - Compute-heavy CAD and geometry algorithms - Real-time, multi-user collaboration features - Systems bridging frontend graphics and backend compute

Tech stack

Frontend - React, Next.js, TypeScript

Graphics - WebGPU, WebGL2, three.js, React Three Fiber

Backend - Python microservices with occasional C++ bindings - Kubernetes-based infrastructure

We are hiring Senior and Lead Engineers who enjoy ownership, care about product quality, and like solving difficult technical problems with real-world impact.

Apply via our website: https://www.getencube.com/we-are-encube

Please mention in your cover letter that you found Encube Technologies via Y Combinator.

Tenzir | Software Engineering & Sales | Remote (EU Timezones) | Full-time

Tenzir is building an open-core security data pipeline for the AI era. We empower defenders to collect, shape, and route security telemetry at scale. Our stack relies on C++23/26 and Apache Arrow for the core engine, with a modern TypeScript platform layer.

We are hiring for 4 key technical roles to join our distributed team (HQ in Hamburg):

- Software Engineer (Core Engine): Systems programming with C++23/26. Work on our pipeline language, query execution, database integrations, and streaming data processing with Apache Arrow.

- Software Engineer (Product): Full-stack TypeScript/Python focus. Build the control plane, platform APIs, and developer tools, AI workflows, and anything else that makes our engine accessible.

- Account Executive: Our first dedicated AE to own the full enterprise sales cycle. You'll work with complex deals in security and data infrastructure.

- Solutions Engineer: Lead POCs and post-sales implementation. You'll be the hands-on engineer ensuring customers succeed with complex data pipelines.

We are a remote-first team across European timezones. If you like solving hard data problems, we'd love to hear from you.

Apply: https://tenzir.com/company/careers

  Location: Italy
  Remote: yes
  Willing to relocate: No
  Technologies: Rust, python, golang, kubernetes, terraform, kafka, kafka-connect, debezium, ArgoCD, typescript, AWS
  Résumé/CV: Can email it.
  Email: pauliyobo@gmail.com
  github: https://github.com/pauliyobo
  
  I'm a backend engineer specializing in data services and infrastructure automation, with a proven track record in cutting infrastructure costs through distributed systems design and open source tools.
  In the past 4 years I have mostly built backend services around our company's data lake as well as maintaining its infrastructure, which consists of several regional kubernetes and kafka clusters.
  I am also familiar with the argo ecosystem, heavily using ArgoCD and argo-workflows currently.

CVector | Software Engineers, Senior Research Engineer | New York City (FiDi) | ONSITE | Full-time | VISA SPONSORSHIP

CVector builds software to bring real time economic optimization and AI prediction to every energy and manufacturing plant. We integrate real-time data visualization and analytics to help power generation stations, chemical plants, and other critical infrastructure make informed decisions in rapidly changing environments. You'll help create intuitive, robust web apps, machine learning models and backend systems, shaping tools that directly impact industrial operations and energy reliability. Build AI agent systems that automatically foresee upcoming problems and provide possible solutions.

Full Stack and Backend Software Engineers: We're looking for a passionate Software Engineers comfortable working across our stack (Python, Typescript, React, Supabase, MQTT, TimescaleDB, PostgreSQL, AWS, FastAPI) or someone to specialize in our backend infrastructure.

Senior Research Engineer: Candidates should be experienced with machine learning, and analysis using Python.

Reach out to me at jnapoli+hn@cvector.com

Coram.ai https://www.coram.ai | Senior / Lead Software Engineers | Sunnyvale, CA or London, UK | ONSITE

Coram AI is building an AI-powered video security platform that helps enterprises proactively detect and respond to real-world incidents. We work with large-scale video data, real-time systems, and applied computer vision.

What you’ll work on: • Backend systems handling real-time video and event data • Scalable APIs and data pipelines • Production AI/ML integrations • Building reliable, user-facing features end to end

Tech stack: • Backend: Python, Go, C++ • Infra: AWS, Terraform • Data: Postgres, streaming pipelines • Frontend exposure a plus (React), but not required

You might be a good fit if you: • Have 5+ years of professional software engineering experience • Have worked on backend or platform systems at scale • Enjoy working in small teams with high ownership

Salary - $150k–$250k USD / £90k–£130k GBP + equity

https://jobs.ashbyhq.com/coram-ai

Doowii | Remote (US) | Full-time | https://doowii.io

Doowii is building an “AI operating layer” for education analytics: connect your institution’s systems (SIS/LMS/CRM), and non-technical teams can ask questions, explore, and take action with integrated workflows and highly customized data ontology.

We’re hiring SWEs to ship AI-first product experiences and infrastructure.

Roles: - Senior Software Engineer (AI Product / Backend) - Software Engineer (Full-stack, AI) - Implementation Engineers (FDE or CXE)

What you’ll build: - LLM-backed app features: multi-step query/reasoning flows, conversational UX, follow-ups, citations, and “show your work” - Evaluation + reliability: offline eval sets, regression testing for prompts/tools, quality metrics, guardrails, and latency work - Agentic workflows: tool-calling, retrieval over structured sources, workflows that can debug/repair queries and guide users to the right next step - App/platform foundations as needed: APIs, auth/RBAC, job orchestration, observability, and cost controls

Stack (approx): Python, TypeScript, modern web app stack, LLM tool-calling/RAG patterns, GCP.

You might be a fit if: - You’ve shipped real product features (backend + app), and care about UX + correctness - You have experience building LLM-enabled systems (or you’ve built strong distributed/backend systems and want to go deep on applied AI)

Comp: competitive salary + meaningful equity (seed-stage)

Email: ben@doowii.io Include: resume/LinkedIn

RINSE | REMOTE or San Francisco, Los Angeles, Chicago, Boston, New York, New Jersey, Seattle, Austin, Toronto, or Washington DC | Software Engineer | Full-Time | https://www.rinse.com

Rinse provides dry cleaning and laundry delivery services to customers in twelve metropolitan areas in the US and Canada. We have sophisticated logistics optimization software, a polished consumer product, and firm business fundamentals. We're now over a decade old - this is a stable, yet consistently growing and innovating, company.

Our engineering team is distributed across the United States and internationally, and has been entirely remote for years now, but a desk can be provided in the above cities if you'd prefer.

We're open to both newly-graduated engineers or more senior engineers, provided they meet our bar. We're particularly interested in true full-stack engineers, with strong React / Typescript / CSS skills to complement comfort in a Python / Django environment. We're also seeking engineers with experience leveraging AI to automate complex operational processes.

You will join a high-caliber team where collaboration, honesty, and open communication are at the core of everything we do.

Search term bingo: Logistics, Django, Python, Optimization, React, React Native, Postgres, Mobile Engineer, Automation, Delivery, OR-tools, Forecasting

AllSpice.io | Multiple positions across Eng team. ALL REMOTE

Think of github but for hardware design. (PCB and sch design). Our mission is to bring the same modern workflows that revolutionized software: version control, automation, and collaboration to the hardware world. We are also introducing AI to hardware design!

Our stack.

• Python for actions scripts/plugins.

• Gitea application soft fork.

• Go [server-side].

• Vue/TypeScript Front-end.

• GitHub actions for CI/CD.

• Docker Swarm & Terraform for deployment.

• AWS.

• Postgres DB.

• Rust - backend utility functions.

Current openings:

• Principal Software Engineer (Parsing)

• Sr. / Principal Software Engineer (GenAI)

• Senior Fullstack Engineer (Actions)

• Principal / Lead Fullstack Engineer (Actions)

Apply: https://www.allspice.io/careers

Synaps | Senior Product Engineers | Remote + 3 days/month onsite Paris | €70-100k

We turn messy product catalogs into structured gold using LLMs. Millions of SKUs, 50+ marketplaces, real AI problems. Small team (4 people), building the backbone of AI commerce.

Python, LLMs, GCP, full-stack web

Looking for senior engineers who ship fast and obsess over data.

=> tech[at]gosynaps.com

thelab | New York, NY (Hybrid) | Senior Backend Developer | https://thelab.co | Full-Time | $160-165K + benefits

We're a digital agency focused on e-commerce, marketing, creative production and increasingly, AI-powered workflows to make our own teams more productive. We're hiring a senior backend developer to lead a greenfield ML/NLP project building workflow automations across image production, design, analytics/performance reporting and more.

You'll work on a growing team on the technical side with—with access to talent in every department as we build tools to support our internal processes.

Stack: Typescript, Python, Django, Node, Docker, Kubernetes, AWS, Terraform

Apply: https://thelabnyc.bamboohr.com/careers/189?source=aWQ9Mjk%3D