Elucid | Principal Platform Engineer | Boston, MA | ONSITE (hybrid) | $170k–$205k | https://elucid.applytojob.com/apply/BHpChxSggM/Principal-Pla...

Elucid builds FDA-cleared AI software that analyzes cardiac CT scans to characterize plaque and predict heart attack and stroke risk. The world's best cardiologists use our output to make treatment decisions for real patients. As such, our platform is regulated as a Software as a Medical Device (SaMD) product by the FDA and we operate under HIPAA, ISO 13485, and ISO 27001.

We're hiring a Principal Platform Engineer to own our cloud infrastructure and developer platform: AWS, containers, Terraform, CI/CD, observability, and the self-service tooling that lets our application teams ship quickly inside a regulated SDLC.

We are looking for: 7+ years in DevOps/SRE/platform roles, deep AWS, strong IaC, comfort with containers (ECS/Fargate, Kubernetes), and one language you reach for when building tooling (Python, Go, Rust, Ruby, C++). Healthcare or regulated-industry experience is a plus, but not a requirement.

On-call is a shared rotation, roughly 2–3 weeks per quarter, business-day coverage only (9am–midnight ET, no overnights).

Apply at the link above.

Hive (S14) (www.hive.co) | Engineering roles | Remote within Canada + USA | Full-time

We power marketing for 1,500+ live event brands across North America — festivals, venues, promoters, tours. 40M+ emails and SMS a month, billions of customer data points, real-time integrations with Ticketmaster, Eventbrite, Shopify, and 20+ others.

We’re hiring across a many of our pods:

Senior Backend Engineer, Platform & Services (7+ yrs) Own the core services and data pipelines everything else is built on — high-throughput ingestion, real-time integrations, the foundation under 200M+ messages a month. https://jobs.ashbyhq.com/hive.co/538c47f9-d008-49b7-b0d4-583...

Senior Product Software Developer, Frontend / Fullstack (3+ yrs) Ship customer-facing features end-to-end. https://jobs.ashbyhq.com/hive.co/19c52872-49b4-4095-b0d6-e75...

Engineering Manager, Platform & Services (3+ yrs managing · 5+ yrs hands-on) Lead our platform, infrastructure, and integration pods. Coach the team, set the bar, and help shape engineering-wide direction as part of the eng leadership team. https://jobs.ashbyhq.com/hive.co/cc0790ff-b693-4e3f-8dba-31d...

Senior Software Engineer, Data (7+ yrs) Design and own a cloud-native big data platform handling audience data for millions of attendees and billions of interactions a year. This is one of our newest pods- you’ll be part of the founding team. https://jobs.ashbyhq.com/hive.co/fbb8b4ac-6f8e-450c-b9a3-bf5...

Estuary | US-Based / Remote | Full-time – https://estuary.dev/ Estuary is a VC-backed, post–Series A startup powering right-time data replication and transform — from sub-second CDC replication to terabyte-scale OLAP data flows. We’re open-source, developer-first, and focused on making data movement radically simpler across both our Platform and Applications layers. We’re hiring for:

Senior Systems Engineer — Capture & Materializations Design and build high-performance connectors that move data in and out of Estuary in real time. Work across APIs, databases, and streaming systems to ensure correctness, reliability, and scalability. This role is deeply systems-oriented, with a focus on data plane execution. Go and Rust are core to our stack.

Senior Systems Engineer — Control & Data Plane Own core infrastructure that orchestrates and powers Estuary’s runtime — from control plane services to distributed data processing systems. Tackle challenges in scaling, fault tolerance, and performance across a globally distributed system. Strong backend fundamentals required; Go and Rust experience preferred.

Product Manager - Own product areas end-to-end, working closely with engineering and design to shape the roadmap and deliver a great developer experience. Engage with users, translate real-world use cases into product decisions, and help define how modern data infrastructure should feel to build with.

What we’re looking for: Engineers who care about building reliable, maintainable systems and enjoy working with complex APIs and data flows. We value curiosity, clear communication, and a willingness to learn.

Technical Product Marketing Manager - Founding product marketing hire working closely with Estuary’s Head of Marketing and Developer Relations team. Help shape how we position and communicate the platform to technical audiences through product launches, messaging, technical content, demos, customer stories, and developer-facing campaigns.

Bonus points for experience with CDC tools, open source contributions, or fast-paced startups.

To apply: Email your resume to careers@estuary.dev

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Liquid Blade | Technical Lead (Fractional) | REMOTE | Success-Fee / Milestone-based

Assembling a small team for phased deployment of high-density GPU infrastructure. We have vertically integrated EPC/renewables and specialized construction partners already in place.

Current needs:

Validating site-specific power and thermal constraints.

Reviewing rack density assumptions (HGX/H100/H200).

Supporting technical discussions with colo and hardware vendors.

Advising on liquid cooling / CDU / RDHx deployment.

Ideal background: HGX/H100/H200 infrastructure, high-density colo deployments, liquid cooling, or thermal-power integration.

Terms: Open to fractional, advisory, or milestone-based structures. Compensation tied to execution milestones, not billable hours. We move on data.

Contact: tim@liquidblade.com

Sentinel Defense Technologies | Remote (Global) | Equity → Pre-Seed Closing

   We build real-time civilian threat intelligence for conflict zones — and we just landed our first operational pilot. Multi-model AI pipeline (Gemini 3 Pro / Flash) ingests OSINT from verified sources, runs it through a gated verification system, and pushes geolocated alerts to offline-first mobile clients. Think of it as a personal intelligence analyst for non-combatants — on a phone that works on 2G.

   This is not a pitch deck. We have a working system: Django backend is live, Flutter apps are approved on both App Store and Play Store, multi-gate AI pipeline is processing real OSINT, admin console has human-in-the-loop verification for high-severity alerts. Since our last HN post: 93 candidates vetted across two months, 1 Senior AI/Backend Engineer hired (now owns the verification pipeline), and we've begun an operational pilot with Winrock International for counter-trafficking intelligence in Southeast Asia. Pre-seed is imminent with multiple NGO grant applications under review (WFP, IRC Airbel, DRK Foundation).

   *We need one person*:

   *Must have*:

We also welcome strong full-stack implementation engineers who ship fast and want founding-team equity. Same stack.

   *Compensation (No BS)*:

- Seed (6-12 months): 75% market salary + equity. Increases from there.

If you need full salary today, this is not for you. If you want to build something where the stakes are real and you're willing to bet on yourself to get there — we should talk.

   *Stack*: 

   *Apply*: 

   https://www.sentineldefensetechnologies.co.za

ChainSecurity | Blockchain Security Engineer | Full-time | INTERNS , HYBRID/REMOTE, Zurich, Switzerland | VISA possible | https://chainsecurity.com/

ChainSecurity is a young and innovative cybersecurity company that operates in the blockchain and cryptocurrency space. Our mission is to make the blockchain space secure and trustworthy for people, companies, and governments alike. We are proud of our security experts from the renowned universities ETH Zurich, EPFL Lausanne and others.

We are trusted by 100+ blockchain companies and established corporations with security audits and services. We have secured complex systems for top blockchain clients, such as decentralized finance (DeFi) projects, and multinational organizations, such as banks and industrial consortia. A ChainSecurity Auditor will review the most complex blockchain projects to find vulnerabilities which no-one else can. By using state of the art tools, expert knowledge and a deep understanding of the fundamentals, we secure projects handling billions, often forming the foundation in the new paradigm of an open financial system.

Your Responsibilities:

* Work directly with the developers of the most successful teams in the blockchain industry to audit their code and secure their products

* Contribute to our security tools and create new ones in collaboration with our internal research team

* Conduct security research and publish your findings

Requirements:

* Strong background in software engineering, focused on security relevant areas and most importantly being able to reason about complex code

* Experience with penetration testing, vulnerability scanning, threat modeling or similar is a plus

* Good knowledge of cryptography

* Proficiency with Linux and Git

* Good written communication skills

* Fluent in OOP programming language

Bonus Points:

* Formal Verification, White Box, Vulnerability Scanning

* Solid Blockchain Knowledge

* Consensus Algorithms

Join us here: https://www.chainsecurity.com/jobs/blockchain-security-engin...

Questions about the role? Contact: jobs@chainsecurity.com

At Tether (https://tether.io/) we're hiring!

We envision a world where technology enables financial freedom, educational empowerment, energy sustainability, and data sovereignty.

All of our roles are fully remote, worldwide. Apply now:

- Mobile Developer (React Native): https://careers.tether.io/o/react-native-developer-wallet-te...

- Lead Mobile Developer (React Native): https://careers.tether.io/o/lead-software-engineer-mobile-de...

- AI Inference Engineer QVAC: https://careers.tether.io/o/ai-inference-engineer-qvac-100-r...

- Fullstack Developer: https://careers.tether.io/o/senior-fullstack-developer-100-r...

- Frontend Developer: https://careers.tether.io/o/senior-frontend-developer-kyc-wo...

- Backend Developer: https://careers.tether.io/o/senior-backend-developer-nodejs-...

- Technical Product Manager (QVAC/ AI): https://careers.tether.io/o/technical-product-manager-qvac-1...

- Technical Product Manager (Hadron/ Tokenization): https://careers.tether.io/o/technical-product-manager-hadron...

Post Up | Full time | Senior Backend Engineer | Onsite | Vancouver, BC (Hybrid) | Salary: $120-$130k CAD | https://www.postup.pro

I'm Wilson, co-founder of Post Up. We're building the Databricks for content production. Our orchestration engine coordinates pipelines end to end and turns post-production workflows into a persistent graph of assets and transformations, which are deterministic, verifiable, and nearly instant at scale, powered by a high-performance compute layer.

We're building this AI-native from the ground up; ML inference is embedded throughout the pipeline, not bolted on.

Stack: On-prem, HPC clusters, distributed storage systems, GPU pipelines, real-time video compute.

We're looking for our founding senior backend engineer who wants to work on genuinely challenging infrastructure problems across distributed systems and media processing with immense scale. Should be familiar with Golang, Postgres, Distributed systems, Distributed filesystems (e.g. HDFS, Ceph, etc).

Me: https://www.linkedin.com/in/hayswilson/

How to apply: Email me directly at wilson@postup.pro or Submit here: https://www.notion.so/Founding-Senior-Backend-Engineer-31031...

Instinct Science (https://instinct.vet) | Multiple Roles | REMOTE (US) | Full-time

We're the AI platform for veterinary medicine — cloud-native EMR, AI scribing (ScribbleVet, acquired early 2026), clinical decision support, and Plumb's drug reference. Instinct is the operating system vet teams run their day on, from charting through clinical decisions to pharmacy. Real revenue, real PMF, scaling fast.

- Senior Full-Stack Engineer | $150–175k Elixir (+ Ash) / Postgres / TypeScript / React / AWS. Own features end-to-end. https://instinctscience.applytojob.com/apply/1H156iuuzg

- Senior Software Engineer, React Native | $150–175k Embedded in ScribbleVet. Mobile app vets use during live appointments — audio capture, offline, AI-assisted clinical workflows. Expo + GraphQL. https://instinctscience.applytojob.com/apply/4Yj4DavJ6D

- Product Manager | $120–150k Translate vet workflows into roadmap. 3+ yrs PM in early-stage SaaS. https://instinctscience.applytojob.com/apply/uU7QfJpdSf

Fully remote (US) but not async. Equity, full benefits, 401k match, annual retreat.

Reach out to vinnydidonato at instinct.vet with [HN] in the subject. Thanks!

Graphics/Multimedia Editor for The Upshot at The New York Times | Full-time | NYC or DC

We're looking for a visual journalist and graphics developer to report, write, design and code data-driven stories and visualizations. We're looking for someone who can produce inventive explanatory, analytical and interactive journalism in a variety of forms, from conception through publication; and who is also enthusiastic about contributing your skills to colleagues' projects.

https://job-boards.greenhouse.io/thenewyorktimes/jobs/466994...

Ria Money Transfer | https://www.riamoneytransfer.com/en-us/ | Hybrid Denver, CO | Full-time Currently looking for a AI-first full time product engineer to help us on a transform our digital product! Looking for someone with backend experience that is interested in having more product ownership. This is a super exciting time to join and you will have a ton of ownership over what you build!

Feel free to reach out directly, send me some cool projects you've built!: https://www.linkedin.com/in/chbigelow

* Product Engineer, Backend: https://www.linkedin.com/jobs/view/4383274196/?trackingId=mz...

Brandfetch (https://brandfetch.com) | Senior Backend Engineer | Remote | Full-time

Brandfetch is the internet’s canonical source for logos and brand assets. Think GitHub for brand identity: a brand repo that auto-indexes public assets, lets brand owners “commit” changes once, then propagates them—instantly and immutably—through CDNs, plugins, and APIs used by companies like Google, Canva, Salesforce, and soon … everywhere.

Problems you'd work on:

- Nightly curation bot auto-fixing outdated assets across 52M+ repos

- Next-gen ingestion and partition-key schema to leap from millions to billions of assets

- MCP server that exposes structured brand data to any AI agent or LLM, letting them fetch brand context on demand

- Vector search: surface any logo with ≥90% similarity in <50ms

- Real-time metering that pings Stripe the instant a user tops their quota

Stack: Node.js, TypeScript, Python, AWS (Lambda, DynamoDB, CloudFront, S3, CloudFormation), Serverless.

You:

- 8+ years of experience in backend software development.

- Proficiency with AWS tools (Cloudformation, API Gateway, DynamoDB, Lambda, Cloudfront, S3, IAM, OpenSearch).

- Experience with building REST APIs.

- Ability to write well-documented, clean code.

- Experience with building DevOps pipelines using Serverless.

- Great communication skills (we work across multiple timezones and document everything).

- Experience with Machine Learning.

Competitive salary + equity in a profitable, growing company.

apply: career at brandfetch.io (no recruiter please).

*Labor Solutions (YC-style) | Senior Software Engineer | Remote (India) | Full-time*

We run a worker wellbeing and compliance platform used by global buyers and their supply chain sites across Asia. We're in the middle of a meaningful migration and platform buildout — you'd be joining at a point where architectural decisions matter and your fingerprints will be on the system for years.

*The work:* Our stack is Django + Python on the backend, dbt for data transformation, React/Next.js on web, and Expo/React Native for mobile. We run on AWS and Azure. Right now we're migrating legacy services while simultaneously shipping new features — so you'll need to be comfortable holding both in your head.

*What we're looking for:*

- Strong Python/Django chops — you've built and maintained production APIs, not just tutorials - Comfortable with React/Next.js; bonus if you've touched Expo or React Native - You understand what a data pipeline actually does (dbt experience a plus, but SQL fluency matters more) - Cloud experience on AWS or Azure — not ops, but enough to not be blocked - You care about code quality without being precious about it

*What this isn't:* This isn't a greenfield startup with infinite runway. It's a real product with real users, real technical debt, and a migration in progress. If that sounds like a problem, this role isn't for you. If that sounds like the most interesting kind of work, let's talk.

*Details:* - Fully remote, India-based - Senior Software Engineer title

Apply: abhishek dot baddi at laborsolutions dot tech | mention HN in the subject

Stream | Amsterdam (NL), Skopje (North Macedonia)| Remote possible | Full Time | Visa Sponsorship

We power real-time Chat, Video, Activity Feeds, and AI Moderation for apps like Strava, Bumble, eBay, and Patreon - billions of API requests per month, millions of concurrent users.

We're looking for a hands-on Lead Engineer (Staff / Principal level) to own Platform & Infrastructure.

Reports directly to the CTO.

Small, senior team - you'll write code most of the time, not run a process org. First 6 months focus on three things with measurable outcomes:

* Cloud cost optimization (AWS/GCP) — tooling and guardrails, not reports

* Platform reliability and scalability — SLOs, observability, hardening

* Architecture decisions on Kubernetes, databases, and cloud provider strategy

Stack: Go, Python, AWS, GCP, Kubernetes, PostgreSQL, CockroachDB, Redis, Terraform.

Looking for: software engineering background (Go or Python, not scripting-only), production cloud cost optimization experience, real distributed systems depth, and active AI tooling use in your engineering workflow.

Not a fit if: you're security/compliance-heavy, scripting-only, or dependent on large-org support structures.

Full JD + apply here: https://jobs.ashbyhq.com/stream/cbabbb5d-0e34-486b-acf7-ce40...

Amodo Design (https://amododesign.com/) | Sheffield, UK | Software Engineer | Onsite or Hybrid We are hiring software engineers who enjoy solving important real-world problems and working close to hardware; who learn new domains quickly and prefer practical solutions over over-engineered systems or unnecessary complexity. You’ll work on the projects best suited for you. Projects range widely, and include:

- Scientific tools

- Automation & robotics (Linux & ROS level)

- Embedded C/C++ (typically owned by dedicated firmware engineers, but software engineers are welcome to learn!)

- Linux, CUDA, Server engineering for our AI safety, security, and verification work

- Custom simulation software (usually python)

- Data analysis pipelines (python)

- Organisational tooling (Typescript, react, postgres, etc.)

Structure: Small teams of software, mechanical, electronics, and firmware engineers build end-to-end systems, typically shipping within a few months.

Apply: https://amododesign.com/career

Holepuch|Remote, Worldwide|Senior Node.js Software Engineer

At Holepunch, we are redefining the internet’s architecture. Our open-source P2P platform, Pear, enables developers to deploy applications directly from their machine to users, creating scalable, decentralized applications without traditional server infrastructure. We are seeking Node.js Software Engineers to join our 100% remote, globally distributed team. You’ll work on our P2P stack, which includes over 1500 public npm modules, and help expand our ecosystem.

Why Holepunch?

- Work on groundbreaking technology that prioritizes user autonomy and privacy. - Collaborate with a team of thinkers and innovators dedicated to reshaping the digital landscape. - Contribute to a future where technology serves humanity, not the other way around.

Apply now to join our mission:

https://holepunch.recruitee.com/o/p2p-nodejs-engineer?source...

https://holepunch.recruitee.com/o/senior-node-engineer?sourc...

Aerofex | Senior Flight Software Integration Engineer (Ardupilot / Simulink) | Remote / Los Angeles | Contract

Aerofex is a rapidly-growing aerospace startup developing next-generation thrust vectoring and VTOL propulsion technology for manned and unmanned platforms. We are seeking an experienced engineer to support the migration of an existing flight-control implementation from a flight-verified Simulink-like development environment into an ArduPilot-based production implementation.

This is a 1-2 month contract position, with potential for future full-time work. The primary task is to create a custom ArduPilot airframe configuration for a (slightly) nonstandard vehicle. This work will focus on actuator/output mixing, PWM output expansion, firmware integration, and hardware-level debugging on a Pixhawk-based flight controller. A successful candidate will have worked closely on a similar task and is very familiar with Ardupilot.

More details in this doc: https://docs.google.com/document/d/1FAwS8fu59-dUH21dn7kgj0JW...

Please apply here: https://forms.gle/JDFAEE6AVmZ5yZej6. Enter the exact text "HN!" in the "How did you find this form?" question.

Rad AI Multiple roles | On-site San Francisco | Full-time | https://www.radai.com/ We're rapidly staffing-up our new office in San Francisco at 2nd & Market! Empowering physicians with best-in-class AI radiology solutions to save time, reduce burnout, and improve patient care. Series C with tremendous momentum.

High-priority technical roles in Engineering Leadership, Security Leadership, Infrastructure Engineering, Head of Continuity Product, and many more roles.

See all open roles and apply here >> https://www.radai.com/careers?utm_source=W29wy29rlJ

Lucas Hage | Software Engineer (Backend / Full Stack) | Remote | Open to contract or full-time

5+ years building backend systems and cloud infrastructure. Currently at Flora Energia (São Paulo), previously at Colab and Terramagna.

Stack: TypeScript / NestJS · Python · Rust · PostgreSQL · RabbitMQ / SQS · Kubernetes · Docker · AWS (Lambda, EKS, RDS, Bedrock, Step Functions, S3, EventBridge) · OCI · GitHub Actions · Grafana / OpenTelemetry

Recent highlights: - Migrated AWS Lambda architecture to Kubernetes microservices (NestJS/TypeScript) - Participated in infrastructure migration from AWS to OCI (Oracle Cloud Infrastructure) - Built an AI-powered SmartField system using AWS Bedrock with RAG and OCR for automated data extraction - Designed a serverless document processing pipeline with Step Functions and multiple Lambdas - Built a scheduled notification system using EventBridge Scheduler and Lambda, improving communication reliability

CS degree (Universidade Federal de São João Del Rei). AWS cert. English: advanced.

Email: lucashage1995@gmail.com LinkedIn: linkedin.com/in/lucas-hage-7b33bb194 GitHub: github.com/hage9998