Positron | Bootstrapping Startup | South Korea | Co-founder

Equity-only co-founders. If you must take a salary position, send us a resume with "Salary only" and we'll check back later.

We're developing an efficient social-decision model so that communities can organize social-finance campaigns and effectively administrate funds without being beholden to one creator. Keeping funds in the hands of backers creates accountability and is one key to taking social finance to the next level.

We say that our social tech "makes the money smarter." It will do this by making communities smarter. How we do social will change how every future social platform gets built and will upset every social product on the market. Society will benefit tremendously from the more coherent discourse.

To bootstrap our platform, we are developing an music visualizer called MuTate. It will soon be powered by our in-house machine learning tricks, which do not rely on back-propagation in order to enable radical forward architectures that are smaller and easier to develop and train. This work directly impacts our mission and aligns us both with consumer enthusiasm for small & local AI to run outside the cloud and with people working on hard problems that need AI tool-kits they can embed their own world models within.

We are using PrizeForge as a better kind of Patreon while we finish our crowd cognition implementation and start to integrate social decisions with our existing social finance.

Our entire tech stack is Rust where possible. We use Leptos, Axum, Postgres with SQLx. It's like a full-stack typescript setup, but with Rust and WASM. MuTate uses Rust, the Vulkan API, and Slang.

Anyone who materially accelerates the trajectory of the company will participate proportionately in the rewards. Our work on MuTate will put us default-viable. Our work on crowd cognition and community-organized campaigns will likewise make use default-viable.

Prototype two-dimensional fund raising: https://prizeforge.com Career listings with more details: https://positron.solutions/careers MuTate Github repo: github.com/positron-solutions/mutate

Korean language skill is optional but anticipate learning business Korean and translating a lot. Same timezone is as far as will be considered remote unless you're physically stuck in Ukraine etc and begin by contributing on MuTate.

Source (https://source.network)| USA/Canada: REMOTE | Full-Time | https://careers.source.network

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

Architect Financial Technologies | Chicago | Onsite / Remote | Full-time | architect.co

Architect recently raised a $35M series A and is looking to fill a number of software engineering roles.

As a key member of our growing team, you will help build out our advanced exchange which is the world's first centralized and regulated exchange for perpetual futures on traditional assets (FX, stocks, metals, interest rates, energy, compute, and other commodities).

Bonus points if you have:

- Experience with Rust

- Experience working in the finance industry, or a strong interest in electronic trading

- Knowledge of architecture, testing, and deployment of distributed systems

- Live in Chicago

Full-stack development experience with Typescript and React a plus

If you’re interested, please send a resume and brief intro to Email is hidden or reach out to me with any questions about the role

Pelairo Inc. | Senior Full Stack Developer | REMOTE (US Only) | Full-time | $100-150k

At Pelairo we're building the most intuitive and flexible Laboratory Information Management System (LIMS) on the market. "Manage the lab, not the LIMS!"

After a successful hire from our post in November, we're back! We're looking for a hands-on Senior Full Stack Developer to help design and deliver core product experiences across our stack (TypeScript + NestJS on the backend and Next.js on the frontend.) You'll work on customer-facing workflows, turning ambiguity into shippable slices, and helping us level up reliability, security, and speed as we scale.

What you'll do:

- Build features: implement and ship production ready functionality across frontend and backend (TypeScript, Next.js, NestJS). - Backend: contribute heavily to APIs, data models, and integrations that power questionnaire-driven workflows and FHIR pipelines. - Frontend: build intuitive, configurable UI modules for complex healthcare workflows, collaborate closely with Product and domain experts. - Quality & reliability: contribute to testing strategy (unit/integration/contract/E2E), safe migrations, and rollouts (feature flags). - Observability & performance: instrument tracing/metrics/logging, improve dashboards/alerts, and participate in incident reviews and follow-ups. - Engineering excellence: raise the bar through strong code reviews, pragmatic standards, and improvements to the developer experience. - FHIR correctness: help ensure backend transformations produce valid FHIR resources in Medplum and support scalable data flows. What makes you a great fit:

- 7+ years building production web applications (frontend + backend) in a fast-moving environment. - Strong TypeScript + Node.js experience and solid production exposure to NestJS (or comparable backend frameworks with willingness to ramp quickly). - Strong experience with modern React-based frontend development (React / Next.js) and comfort owning UI implementation details. - Experience shipping ambiguous projects end-to-end with good judgment, pragmatism, and clear communication. - Familiar with building secure systems and thoughtful about reliability, testing, and performance. Bonuses:

- Experience with FHIR / Medplum, healthcare data workflows, or LIMS/clinical systems. - Familiarity with HIPAA and/or SOC 2 practices. - AWS experience (e.g., Cognito, Fargate) and comfort working in cloud-native environments. Stack: TypeScript (Next.js + NestJS), Medplum, AWS (Cognito, Fargate) Visa/relocation: No

How to apply: Email hiring [@] pelairo.com and mention "HN Who's Hiring January 2026." (We know our website needs some work, but the product is our priority right now.)

Ionworks | Founding Systems Engineer | Remote (US) or Pittsburgh, PA | Full-time Ionworks builds battery simulation and optimization software used by R&D teams designing next-generation batteries. We are looking for a founding backend / systems engineer to own big pieces of our backend and help us scale from a few early customers to broader industry use.

Work: - FastAPI, async Python, Supabase/Postgres - Designing APIs and data models for simulation and optimization workflows - Performance and reliability work across the stack (queries, async, concurrency, resource limits) - Job orchestration for running and tracking simulations - Observability: logging, metrics, tracing, debugging real issues

We are especially interested in people who work in a "vibe engineering" style: using LLMs and coding agents as accelerators, but still planning ahead, writing tests, supervising agents, and staying fully responsible for code quality and architecture. If you already use AI tools this way in your day-to-day work, you will fit in well here.

Stack: FastAPI, Python, Supabase/Postgres, distributed compute for simulations, AI-assisted dev.

Benefits: competitive salary, meaningful equity, remote-first, unlimited PTO, 401k match, medical/dental/vision, paid parental leave, home office budget.

If this sounds interesting, send a short note to Email is hidden with "HN backend" in the subject and fill in the application here: https://apply.workable.com/ionworks/j/a8c2f4287c/

Zetier | Multiple US locations (VA, PA, FL, TX, CA, NY) | ONSITE | Full-Time

Zetier develops real-world tools and capabilities to secure our nation in the short- and long-term. If you’re excited to delve deep into low-level systems, exploit dev, and more alongside a group of passionate hackers, then we’d love to hear from you.

Open-sourcing our work as much as possible is integral to Zetier and what we stand for. As folks who learned to hack on platforms like Linux, we aim to give back to the OSS community. Not only do we encourage our engineers to contribute, but we go a step further, adding monetary incentives to do so.

We’re looking to find the right people for a range of roles, including:

+ Vulnerability Researcher

+ Android Security Engineer

+ CNO Embedded Engineer

+ CNO Software Engineer

+ IT Security Engineer

+ Senior Technical Lead

+ Business Developer

+ Program Manager

All open positions: https://zetier.breezy.hr/

Our approach and benefits: https://zetier.com/careers/

Different skill set? Drop us a line at Email is hidden

Count | Senior Software Engineer | REMOTE (UK/Europe/US East Coast) | Full-time | £100–140k (or local equivalent) + Equity | https://count.co

Count is an infinite, real-time canvas where SQL, Python, and low-code query cells live side-by-side with visualizations and freeform whiteboarding. It replaces the traditional linear notebook with a collaborative space for modeling, analysis, and presentation.

Under the hood, we've built a custom WebGL rendering engine, data visualization library, graph-based modeling layer, and horizontally scalable compute engine (DuckDB-based) that dynamically shifts execution between browser and server to minimize latency and reduce database load.

You'll help evolve the core platform: integrating agentic workflows into data exploration, pushing the performance limits of our distributed execution layer, and building powerful new analytics experiences used daily by customers. You'll have high autonomy and ownership over major parts of the product and technical roadmap, from architecture through production.

Tech stack: TypeScript, Python, Node.js, WebAssembly, WebGL, Apache Arrow/Parquet, DuckDB, Kubernetes, React.

Apply here: https://jobs.ashbyhq.com/count

Mending | https://mending.com | REMOTE (in US) | Full-time | Product Engineers

Mending is a team of healthcare nerds, software engineers, product designers, direct primary care doctors, health insurance experts, and more. We are building a healthcare system that makes sense, starting by redefining the role of health insurance – one that focuses on reducing friction for doctors and patients, and investing in ways to create more meaningful doctor-patient relationships.

* Product Engineer: https://www.mending.com/careers/product-engineer

We’re looking for a motivated and impact-oriented Product Engineer to join our small team of 5. Your primary focus will be building data pipelines and backend systems that automate and improve workflows for patients, providers, and internal operations.

You will be instrumental in ensuring seamless interactions from efficient patient support and operational workflows to reliable payment processing, which are powered by the robust systems you design and implement. As a key contributor, you will partner closely with internal stakeholders and external customers, translating insights into product requirements documents that directly drive your work.

Tech stack: Python (flask, temporal) on the backend, Nextjs/React on the frontend

Sumble is the newco from the founders of Kaggle. We are hiring full stack engineers, ai/ml engineers and growth/marketing.

Can view our roles and apply here: https://sumble-inc.workable.com/

We are building a knowledge graph from web data with a first focus on data for go-to-market teams.

We use web data to identify things like org structure, tech stack, and key projects (e.g., GenAI initiatives, cloud migrations). Our product already has strong product-market fit, early revenue, and happy customers — and now we’re ready to accelerate.

Our long-term vision is to become the world's best data vendor. Try the product at sumble.com.

We are a team of 25 with experience at companies such as Google, Meta, Stack Overflow, Rippling, Snowflake, Confluent and Kaggle.

We recently announced a $38.5MM financing: https://techcrunch.com/2025/10/22/sumble-emerges-from-stealt...

Microsoft Research is hiring Senior MLE's in Cambridge, MA (ONSITE).

Responsibilities include the training of generative models and anything that contributes to the betterment of their capabilities -- profiling / optimizing their throughput, scaling training runs, tuning of hyperparameters / data mixes, etc. If it makes the model better, it's fair game!

Depending on the project, you will likely be involved in some combination of AR model training, diffusion model training, midtraining, post-training, multimodal training, etc.

As you can likely surmise, we're looking for folks who are flexible and comfortable wearing many hats. If this sounds like you and you're interested in working in a research environment, consider applying!

https://apply.careers.microsoft.com/careers/job/197039355664...