RepSpark is the top SaaS B2B wholesale e-commerce platform for brands in apparel, footwear, and accessories. For example, we're how golf courses across North America and Europe purchase brands like Titleist, Peter Millar, Kjus, etc.

Stack: C#/.NET (Rider on macOS), GraphQL, React, TypeScript, PostgreSQL, AWS (CDK).

We're actively hiring:

* Senior Product Engineer (Full-Stack): Own outcomes across React/TS + C#/.NET + Postgres; help modernize legacy .NET Framework to .NET 8; build/scale ERP ETL & integrations. https://www.repspark.com/senior-product-engineer-full-stack

* Product Manager - Integrations: Own the integrations roadmap; prioritize ERP connectors (NetSuite, SAP, etc.); partner closely with engineering. https://www.repspark.com/product-manager

Email careers@repspark.com with your resume and optionally GitHub/portfolio.

Pango is building the world's first Agentic Operating System for e-commerce logistics. Our vision is to create the AI e-commerce employee of the future. We are forming our core team in Stockholm and are looking for exceptional engineers. We are based at the SSE Business Lab, where companies such as Klarna, Voi, Budbee or Legora originated. We have achieved a product-market fit and are growing rapidly.

You are a good fit if:

* You are comfortable maintaining, expanding and operating an entire B2B SaaS platform with a high sense of ownership.

* You are happy to take on work that in a large company is divided into a dozen roles, and execute it all at a good enough level.

* You are unafraid of any technology. If we need a desktop app and you haven't done one before, you will study the documentation of Electron.js and build one. If a model for predicting delivery times is needed, you will do a literature review to find the right architecture and train one.

* You have strong proficiency in any backend language or platform, with a strong willingness to dive deep into PHP/Laravel OR strong proficiency in JS/React.

* E-commerce (Shopify, Magento, other platforms, shipping carrier integrations) experience is a plus.

You will take a key role in shaping the product and company, with ability to make an impact and advance career limited only by your aptitude and interest.

Reach out to lukasz@pango.ai if you are interested or have any questions. We review applications immediately and move quickly.

IPinfo is a leading provider of IP address data, including geolocation, VPN and residential proxy detection, mobile carrier data, and over 20 other context tags. Our API handles over 120 billion requests per month, and we also license our data for use in many products and services you’ve likely interacted with.

We’re a fast-growing, bootstrapped company with a globally distributed team of around 60 people. Our data powers customers such as Cloudflare, T-Mobile, SpaceX, DemandBase, and Clearbit, among many others. We also sponsor and contribute to academic conferences like ACM IMC and ACM CoNEXT, staying closely connected with the internet measurement and research community.

- Data Engineer - Geolocation team - read more and apply at https://ipinfo.bamboohr.com/careers/76?source=aWQ9Mjg%3D

- Data Engineer - Privacy team (VPN / ResProxy etc) - read more and apply at https://ipinfo.bamboohr.com/careers/75?source=aWQ9Mjg%3D

- Research Scientist - read more and apply at https://ipinfo.bamboohr.com/careers/74?source=aWQ9Mjg%3D

We're always on the look out to strong software or data engineers with an internet measuremenet / analysis background to join our team too.

Kroo is building the knowledge platform for construction, an industry that deeply needs more technology solutions. We’ve built a platform that our 30+ enterprise customers use to operate and maintain data connectors, warehousing, and knowledge graphs specific to the nuances of the construction industry (think on-premises systems, archaic APIs, etc.). Our customers, data professionals in the construction industry, use our software to build reporting and run analytics for billions of dollars of jobs.

We're looking for full-stack Software Engineers with 3+ YOE. We are a venture-backed, pre-seed stage company with an experienced and hungry team. We’re backed by leading investors in the space and based in Midtown NYC (hybrid). If you’re looking to build in an industry that desperately needs data and AI solutions, apply here! https://jobs.gusto.com/boards/kroo-70b14610-ea9c-4478-9fc8-5...

Uncountable accelerates R&D for industrial scientists across leading materials, chemicals, and life sciences organizations. With our SaaS solution, our customers get better products to the market in half the time. Uncountable was founded by MIT and Stanford engineers and has been profitable since 2016. Our team has grown from 50 to 100 over the last two years.

Full-Stack Engineers | $120k - $220k + Equity

---> Uncountable is looking for engineers who can spearhead the development of the Uncountable Web Platform. The position is heavily product-driven and comes with challenges across the stack.

--> Summer internships and working student positions are also available.

Learn more: https://www.uncountable.com/hiring/hn

Uncountable is hiring in New York City, San Francisco, London, and Munich.

Contact our CTO directly at jason@uncountable.com

We’re building debugging intelligence for modern software teams. BetterBugs captures rich technical context at the moment a bug occurs and turns it into actionable insights for developers — not screenshots, not back-and-forth.

Our next leap: AI that understands bugs, not just describes them.

Senior AI / LLM Engineer (Python) : Build production LLM systems that understand real-world bug context (logs, stack traces, network, user actions). Design agent workflows for root-cause analysis, bug triaging, and debugging assistance. Implement RAG pipelines grounded in codebases, historical bugs, and execution data. Own prompting, evaluation, reliability, and observability of AI outputs. Build and operate Python services (FastAPI) powering AI features in production. Strong Python, hands-on LLM/agent frameworks, Docker; bonus for dev tooling or observability experience.

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”)

Cancer patient support and education nonprofit needs experienced full-stack dev for meaningful 10-12 week contract.

PROJECT: Build secure, mobile-friendly front-end for Airtable database with SSO integration (Hivebrite), (potentially) HIPAA-compliant AWS hosting with BAA, and PDF export functionality.

STACK: Your recommendation (we prefer React/Vue + Node.js/Python, AWS with HIPAA compliance)

REQUIREMENTS: * HIPAA-compliant app development experience * SSO/IdP implementation * AWS with Business Associate Agreement setup * Airtable API integration * Clear communication with non-technical stakeholders

SCALE: Small, includes de-identified patient information, straightforward data interface

WHY IT MATTERS: Help cancer patients find treatment options that could extend their lives.

Details here: https://docs.google.com/document/d/1Z8fWTmDHJndBDH11sz8_707B...

Our mission is to make it normal, not heroic, for edge AI, mobile apps, and critical software to run close to where data is born: on devices, in vehicles, in field hardware, not just in a distant GPU farm. We’re building the data and trust layer that lets developers ship systems that still behave correctly when links are flaky, latency is awful, and the cloud is optional instead of mandatory—instead of the usual “SQLite everywhere + ad-hoc sync” duct tape.

We’re growing fast and are looking to fill the following positions:

-Chief of Staff - https://source.network/careers/chief-of-staff

-Lead Edge AI Engineer - https://source.network/careers/lead-edge-ai-engineer