Trail of Bits is a cybersecurity research and consulting firm based in Brooklyn, NY. We work with companies like Epic Games, Google, Microsoft, and Zoom on their hardest security problems: smart contract audits, application security, vulnerability research, and more.

We're hiring 10-12 summer interns (June-August) to work on real client projects and research alongside our security engineers in NYC. You'll contribute to software security assessments, tool development, and research that gets published. What we're looking for:

Strong technical skills: C/C++, Rust, Go, Python, Solidity, etc. Experience in reverse engineering, appsec, program analysis, smart contracts, or cryptography

NYC interns get the full experience: Summercon, team events, Broadway shows, and more.

Remote available for strong candidates.

Actively reviewing applications and interviewing now.

Apply: https://apply.workable.com/trailofbits/j/0C784B6D41/

GitBook | Full-time | REMOTE (EU ±3h) | Product Engineers & Solutions Engineers

Hey HN! We’re GitBook — building the next generation of documentation and knowledge tools used by teams and engineers worldwide to create, organize, and publish docs, decent change you've visited docs in the past that are created through us! Our platform combines a modern editor, collaborative workflows, and AI-native capabilities to help teams ship better docs faster — whether that’s API references, product guides, internal knowledge, or user support content.

We’re a small, fully remote team (~35 people across ~13 countries) with a bias toward async work, autonomy, and impact. We meet a few times a year in person for offsites, support flexible schedules, and invest in great tools and setups for everyone.

Open roles (remote EU ±3h): • Product Engineer — help build core parts of our product experience and platform. • Solutions Engineer — work with customers to understand needs, build solutions on GitBook, and drive adoption.

Learn more about us: https://www.gitbook.com/ Careers & apply: https://www.gitbook.com/careers

Farmgirl Flowers | https://farmgirlflowers.com | Remote (US or EU timezones) | Senior Software Engineer

I’m the Director of Engineering at Farmgirl Flowers, an online flower shop with a loyal customer base. We're looking for a product-minded engineer who can own projects end-to-end and keep things simple, safe, and maintainable.

We're a small team of three, so communication is fast and your impact will be immediately visible. We value pragmatism over "perfect" - shipping useful solutions matters more than polishing forever.

Stack: Rails 8, MySQL, Heroku, AWS, a little React -> moving toward Hotwire.

Email me at ignacy [at] farmgirlflowers.com to know more!

Valis Insights (VALIS) | Full-time | Software Engineer | remote-first hybrid Massachusetts (US) Hi, I'm Caleb (co-founder/CTO) from Valis Insights. We're a small climate-tech B2B SaaS/HaaS startup, based out of MA. We build material sampling, sorting analytics, and material monitoring web-based and hardware/computer-vision enabled solutions for metals recycling companies.

We're looking for a passionate SWE with some linux/networking/firmware experience to drive forward some greenfield product development and help scale & deliver existing hardware-enabled offerings. We've got some scale-integrated cameras deployed in the field which enables a web-app for analytics for material sampling. We've got a few units deployed at metal recycling facilities, and we're ramping up sales. We're also building a camera-over-conveyor-belt solution for process monitoring (greenfield dev/R&D).

Desired Competencies: linux, networking, basic electronics, firmware, cloud infra (AWS), web products, databases

Nice-to-Have Experience: edge-to-cloud CV system deployment/design, .NET ecosystem (C#, EF), networking (Wireguard, ssh), firmware dev/mgmt, observability (OpenTelemetry, Prometheus), IaC (Pulumi), stats/math/ML/signal-processing fundamentals, basic soldering, web products (TypeScript, React)

Role is remote-first hybrid. For some hardware/firmware/R&D, you'll need to be in-person in Worcester MA, but majority of role is remote. Infrequent travel to recycling facilities (continental US) for deployment/maintenance will be required.

Apply here - https://apply.workable.com/valis-insights-1/j/A937EAA712/ We read and review every application. Please mention "HN" in one of the written responses.

We're also hiring an ML/SWE intern for the Spring & Summer; apply here - https://apply.workable.com/valis-insights-1/j/98C0E1509B/

Contact: caleb.ralphs@valisinsights.com

Layer Health | https://www.layerhealth.com/ Our engineering team: https://www.linkedin.com/company/layerhealth/people/ Location: BOSTON (Boston Common) or NYC (downtown) - hybrid / NO REMOTE Headcount: ~35 Stack: React / Typescript / Python / GCP Series A, fresh funding: https://www.layerhealth.com/resources/layer-health-raises-se...

Our interview process (candidates love it): meeting w/ me > tech chat with cofounder > take home assignment (capped at 2-3hrs) > onsite interview > offer (no leet code, no algorithms or pressured oddball questions)

Open Roles: Fullstack Engineer (Senior) Python/React/Typescript * Forward Deploy Data Scientist (1-2 years xp) * Jr Data Engineer (1-2 years xp) * ML Engineer * ML Infrastructure * Data Infra Lead Engineer * Research Scientist (PhD req) * Security Engineer

We Offer: * competitive base salary + equity + great health/medical benefits * unlimited PTO * collaborative engineering-first culture

Layer Health was founded in 2023 by leading machine learning researchers from MIT and Harvard Medical School. We are building an AI layer that can accurately and scalably synthesize information from medical records, with the mission to reduce friction everywhere in healthcare. Our LLM-powered platform is solving chart review once and for all, across use cases. For health systems, our first product dramatically accelerates clinical registry abstraction in areas ranging from surgery and cardiology, to oncology. Our long term vision is for our AI layer to safely transform patient care and minimize unnecessary heartbreak. Layer Health’s diverse founding team brings expertise across machine learning, UI/UX, large language models, and medicine.

Email me at mike.hauschild@layerhealth.com for more info!

Join (https://join.build) | REMOTE (US & Canada) | Staff Software Engineer (full-stack)

I’m Head of Engineering at Join, building B2B SaaS for construction teams (contractors, owners, architects). We’re hiring full-stack web staff engineers to help build our React + Go + Postgres collaboration platform and lead technically. Full-stack interest is preferred and at least one of those hires needs to have deep frontend/React expertise.

Details are at https://join.build/company/careers-se/

Salary is $175k–$205k + equity + full benefits, fully remote.

Email resume and a snapshot of your writing style (preferably a PR review) to mark.deutsch @ the domain at the start of this post.

Kubermatic | Full-time | Product Eng & Open Source Dev & CloudNative Consultant | Remote Europe

I am looking for Product Engineers and Open Source Developers to join the KDP and kcp teams.

- Open Source Software Engineer (https://kubermatic.bamboohr.com/careers/24): Work directly on the upstream kcp project. Your contributions will have a direct impact on the open-source community and will help build a framework for managing multi-tenant services at scale. Kubermatic is the project's maintainer.

- Product Software Engineer (https://kubermatic.bamboohr.com/careers/25): Build a platform that makes other engineers more productive. Drive features from discovery to delivery and shape architectural and product decisions. KDP is currently available as a standalone, on-premises solution. As we prepare to launch a new SaaS offering, you'll help evolve our tech stack to meet these emerging requirements.

KCP and KDP tackle the same problem: managing complexity across heterogeneous IT landscapes at scale. kcp is the open-source foundation—a control plane technology that works with any tech stack. We maintain it upstream and contribute to the community. KDP builds on that foundation, delivering a pragmatic platform for enterprise.

We're also hiring for a role that bridges our technology with real-world enterprise challenges:

- CloudNative Consultant (https://kubermatic.bamboohr.com/careers/28): Partner with some of the largest companies in Europe and the US to solve their toughest infrastructure and engineering challenges. You'll guide enterprises through deploying KKP, running virtualization with KubeVirt, and adopting autonomous operations with KDP/kcp —turning complex tech transformations into success stories.

Feel free to PM (wojciech.barczynski@kubermatic.com or LinkedIn) me if you would like to learn more.

Kato | Senior Software Engineer | San Francisco, CA | ONSITE | Full-time

Kato is building a compliance-first AI servicing platform for the $24B lending market. While others treat regulatory guardrails as an afterthought, we’ve built a regulatory rules system with an AI decision engine on top. Our first product is a Voice AI agent currently handling loan servicing calls for major fintechs like Bilt Rewards and Parafin.

We are backed by Pear VC and angels from Brex, Bridge, and Square. You’ll be our second engineering hire, working directly with our CTO (ex-Google/Brex EM) and CEO (ex-Goldman/Brex).

The Role: As an early hire, you’ll own mission-critical projects across the entire stack. You’ll lead the architecture of our real-time voice processing system, optimize LLM integrations for compliance-aware conversations, and build out our customer-facing dashboards.

Tech Stack:

Backend: Golang, PostgreSQL

Frontend: Next.js, TypeScript, React, Tailwind

Infra: AWS, Terraform, Kubernetes, Docker

AI/ML: LLMs, Speech-to-Text, Text-to-Speech

Requirements:

2-5 years of production software experience.

Strong API design and architectural thinking.

An "owner's mindset"—we are a small, high-intensity team where everyone drives product direction.

Experience with WebRTC, real-time audio, or FinTech is a plus but not required.

Location: San Francisco (4 days/week in-person).

To apply: https://jobs.ashbyhq.com/Pear-VC/214dc247-0778-485b-8a3d-067...

Squint | Onsite, San Francisco | Squint is the leading manufacturing intelligence platform. We're leveraging the latest in AI, spatial, and hardware capabilities to accelerate human potential and spark the next industrial revolution.

What makes Squint special?

- Our customers include some of the most iconic manufacturing brands across Food and Beverage, Automotive, and Consumer Package Goods. Work here literally transforms how the world around you is made.

- We're not replacing people with AI, we're up-leveling them; capturing insights, turbocharging workflows on the factory floor, and making every operator an expert.

- We're bringing consumer-grade quality to enterprise software, combining cutting-edge tech with deep customer empathy to build a product that's powerful, magical, and deeply loved by our users.

High Priority Open Roles:

- Applied AI Engineer

- Software Engineer, Backend Infrastructure

- Senior GTM Recruiter

- Senior Accounting Manager

- Director of Enterprise Sales, Energy Sector

- Customer Strategy Partner

- Strategic Enterprise Account Executive

- Senior Sales Engineer

View full list of roles and apply here: https://jobs.ashbyhq.com/squint.ai?utm_source=Hackernews

Careforce AI (previously Helpcare) | Senior Fullstack Engineer | REMOTE (US)

Location: Remote (US) Remote: Yes (US Only) Willing to relocate: No Technologies: Python, FastAPI, React, Supabase, GCP, LLMs Résumé/CV: https://www.ycombinator.com/companies/helpcare-ai/jobs/Hjx9n... Email: Apply via link above

Description: Careforce AI is building autonomous AI agents that eliminate the manual administrative burden in healthcare (fax machines, scheduling, calling). We find, call, and schedule patients, breaking interoperability barriers that have plagued the industry for 40 years. We are a well-funded, YC-backed company with massive customer demand.

We are looking for a Senior Fullstack Engineer to be a foundational member of our small, ambitious team. You will have significant ownership working across the stack to build and scale the core of our AI agent platform. We are looking for builders with 5+ years of experience, preferably with an early-stage startup background (Pre-seed to Series A).

Hiring Tech Lead and SRE – REMOTE LATAM - We build AI tools that help high-volume law firms manage their caseloads more efficiently. Our first product—an AI assistant that transcribes and classifies inbound calls—is in production. We’re now expanding into case tracking, follow-ups, and full workflow automation.

Looking for:

Tech Lead: Lead a senior team, shape product and tech, work closely with founders.

Tech Stack: Python, TypeScript, Postgres, Kubernetes, GCP Languages: Spanish + English for leadership. English only OK for engineers.

SRE: DevOps & Infrastructure Engineer // CI/CD and Kubernetes

Apply here: tramcase.com

Gaia AI | Fullstack Platform Engineer | Robotic Perception Engineer | Full-Time | Boston

Hi, I’m Mel at Gaia AI (https://www.gaia-ai.eco/).

We’re a small GreenTech startup in Boston building hardware and software in the forestry space.

Role: Full stack / platform engineer working on the web app and mobile app. Our stack includes TypeScript, React, Mongo, AWS, and React-native.

Role: Robotic Perception / Computer Vision / Machine Learning engineer working on a sensor-packed backpack for foresters. Our stack includes LiDAR, Vision, SLAM, and Rust.

Preferred Years of Experience: >= 3

Company Size: 7 people

Company Location: Downtown Boston near South Station

For Fullstack apply here: https://docs.google.com/forms/d/e/1FAIpQLSeXplH__tMz_EIRS4yq...

For Perception apply here: https://forms.gle/t7uwLgo5UgadkzrAA

Feel free to reach out to me with questions: mel at gaia-ai.eco

Sage Bionetworks | USA Remote | Full Time | Principal Software Engineer (Backend) https://job-boards.greenhouse.io/sagebionetworks/jobs/409128...

At Sage Bionetworks, we believe in the power of open science and interdisciplinary collaboration to create a new vision of human health. We strive for actionable biomedical insights through the responsible sharing and reuse of data, all guided by our deep scientific expertise and diligent governance controls.

We are hiring a Backend Software Engineer to join our technology team at Sage Bionetworks. Our engineers build the secure, scalable, and high-performance services that power open and collaborative science. From Synapse.org to our research portals and other applications in the Sage ecosystem, the tools you create will enable researchers and communities worldwide to share data, generate insights, and accelerate biomedical discoveries.

We pride ourselves on openness and collaboration. All of our software is available in GitHub. Our openness and non-profit status attracts support from a variety of collaborators, including major technology companies. We prioritize productivity over arbitrary rules, allowing workers to choose the tools and work habits that suit them best, rather than dictating practices, top down. We prioritize software usefulness and stability rather than rushing to get features out the door. We have close relationships with our user base, many in-house, ensuring that we stay relevant.

Tiger Data (FKA Timescale) [ Global | 100% Remote | Multiple Roles: Eng, Product, Support + more ]

We began in 2017 as TimescaleDB, focused on making PostgreSQL the best database for time-series data. As our customers evolved, so did we.

Today, more than 2,000 companies use our technology to power real-time analytics, agentic applications, and high-ingest operational systems. What started as a time-series database has become the fastest PostgreSQL for modern workloads. To reflect that evolution, we’re now TigerData—a name that speaks to our speed, precision, and ambition. The tiger has long been part of our culture: fast, focused, powerful. From “Tiger Time” all-hands to welcoming new hires as “tiger cubs,” it’s how we build—decisively, fearlessly, and with purpose.

This is not a reinvention: it’s a reflection of how we already serve our customers today.

TigerData is growing! Check us out: https://www.tigerdata.com/careers

Software Engineering Manager - Database - https://www.tigerdata.com/careers/08ddff61-b67a-42c5-a799-2e...

Senior Test Tooling Engineer - https://www.tigerdata.com/careers/f50c226d-682e-40e9-8d2e-52...

Database Support Engineer - https://www.tigerdata.com/careers/0aca17c7-7222-4f75-9c8e-59... Customer Delivery Engineer - https://www.tigerdata.com/careers/3d060bc0-1abf-446b-881e-f4...

Senior/Staff Product Manager, AI - https://www.tigerdata.com/careers/542068ed-6f51-4994-9f58-0c...

GreenArrow Email | Remote | Full-Time https://www.greenarrowemail.com/careers/developer

I'm Alex McHale, Lead Developer at GreenArrow Email. We're looking to add an additional developer to our team. The right candidate will have solid Go skills and can "hit the ground running" (so sorry for the cliché). Bonus if you're a polyglot who might have skills in Ruby on Rails and JavaScript.

We've put a lot of thought into our job post. Please give it a read. If you think you're a fit, there's a link at the bottom of the post with a form to fill out.

Buildplace (by Form Follows You GmbH) | https://company.buildplace.io | Berlin

With Buildplace, you can simulate your planning projects in a digital twin in no time. The integrated inventory mapping captures the complexity of your real estate portfolio and transforms it into an interactive map that you can easily enrich with additional geodata. Furthermore, our holistic consulting approach supports you with individual project planning, customized enhancements, and the targeted application of Buildplace for your specific use case.

We are a team of ~10 persons half of them engineers. This might sound small, but we are bootstrapped and try to keep our software stack observable. We program mainly in Typescript with Fastify, BullMQ, GraphQL (Pothos) on the backend, Postgres and Redis as DBs [ and React, Maplibre, BabylonJS on the frontend ]. We see demand in more expertise for container orchestration, load balancing, reverse proxy configuration, VPS Administration and monitoring.

Therefore, if you are curious about our field of work and have knowledge in system administration and / or backend engineering with the stated technologies, feel free to reach out to us!

Contact: mail [at] formfollowsyou.com

Senior Python Backend Engineer | REMOTE

We’re looking for Python backend engineers to work on a trustless supercluster of performance-proofed GPU-enabled sandboxed docker container runners controlled by truly decentralized algorithms (not just PAXOS or RAFT).

Wow, that was a mouthful...

If you found it interesting, join Reef Technologies and tackle complex technical challenges like this on your own terms:

- Contribute from wherever you like—we are fully remote

- Set your own time commitment, as long as it’s at least 30h per week

- See how we work in our handbook: github.com/reef-technologies/handbook

- Influence the way we operate through our Sociocracy 3.0 decision-making process

Salary on a B2B contract:

- 45-70 USD or 180-280 PLN per hour

- Flexible work schedule (as measured with a time tracker)

- We automatically adjust rates based on inflation twice a year

We're looking for someone with 5+ years of programming experience, including at least a year with Python (including opensource and significant personal projects).

So, what do you think? You don't even need a CV, just go to https://careers.reef.pl/?utm_source=hackernews and shoot a few quick commands to apply.

Contact: hiring@reef.pl Web: https://reef-technologies.com/

Prophet Town LLC | Various Software Engineering Roles | US – Remote and Hybrid | English fluency required | Full-time | $150K-$250K annual total comp (multiple)

I’m the founder, trying to do “enlightened business.” We are a people-first, fully-remote, boutique indie tech agency – building a team of talented, high integrity, and community-minded individuals first, then building businesses around them. Our leadership staff are ex-Fortune 100; everybody touches code. Notable recent projects: internal tools for Anduril, and the auction system for voltagepark.com.

We’re currently especially seeking:

Full-Stack Software Engineers (React, NextJS, Ruby on Rails; Typescript, Python; Database Design, Devops, and third-party API integrations)

IoT Developers (Python, MQTT, GraphQL, AWS, Test Infrastructure)

Please apply using this Google Form: https://forms.gle/Dxpj7eTwcHpjiGT39. Applicants who submit before January 15 will typically receive a reply by January 31. Tier3 roles are typically 5-10 y/o/e with $150-$175k annual total comp. Tier4 roles are 11-20 y/o/e, $210-$250k annual total comp. Higher tiers exist, and we welcome exceptional applications.

REGARDING DECEMBER - if you already submitted to last December's post, and haven't heard from us yet, we're still getting to you. The team's been working really hard over the last year, and I unexpectedly gave most of the folks helping me with job submissions the time off at the end of December / beginning of January. Apologies for the delay, and we will be with you soon. Rest assured there are jobs we're trying to fill - in fact, more than ever, it seems.

Adalat AI | https://www.adalat.ai | Remote (India) | Go, React, Next.js, k8s

We're Hiring at Adalat AI: Join Us in Building the Future of Justice

Adalat AI is on a mission to transform India’s judicial system with cutting-edge AI — reimagining courtroom workflows from transcription to summarization, just as UPI transformed payments and Aadhaar revolutionized identity verification. Deployed across 10 states and recently launched at the Delhi High Court, our platform is backed by global foundations and built by a team with roots at Harvard, Oxford, MIT, and IIIT-Hyderabad.

Roles:

- 2 X Fullstack Engineer (5+ YOE) – Own end-to-end feature delivery across React/Next.js, Go services, with Postgres as your database: https://www.adalat.ai/careers/full-stack-engineer

- Full stack Lead Engineer (10+ YOE) - Own technical leadership, mentor engineers, set technical roadmap of several of our products: https://www.adalat.ai/careers/lead-engineer-full-stack

Why Adalat AI?

- Mission-driven: Your work has real-world impact—helping untangle India’s court backlog, improving access to justice for millions.

- Remote-first: Work from anywhere.

- Unlimited PTO: Yes, seriously.

- Unique environment: Co-design with judges, legal experts, and researchers. Publish, learn, grow. We value tech, law, and impact equally.

CLUTCH | Embedded Systems Engineer (Computer Vision), Product Designer, Head of Growth | Remote | Full-time

Clutch builds an AI camera for racket sports courts and an app that generates automated highlight reels and match analysis using computer vision.

Our initial focus is padel (the fastest-growing sport globally). Since launching in 2025, we’ve deployed the Clutch Cam to clubs in 25+ countries.

We’re a small, early-stage team building both hardware and software.

We’re currently hiring for:

• Embedded Systems Engineer (Computer Vision) https://clutchapp.notion.site/Embedded-Systems-Engineer-Comp...

• Head of Product Design (UI/UX) https://clutchapp.notion.site/Head-of-Product-Design-UI-UX-2...

• Head of Growth https://clutchapp.notion.site/Head-of-Growth-2a1f733f6e69800...

https://www.clutchapp.io