Aqora | Quantum Computing Expert | Full-time | Paris (HQ) or Remote (Europe) We're building the go-to hub for quantum computing, focused on organizing quantum hackathons and competitions globally as well as hosting quantum datasets and algorithms. We've partnered with major industry players, generating six-figure revenues, and have more exciting projects lined up. Our MVP is live, and we're looking for a Quantum Computing Expert to help us scale.

In this role, you’ll: - Refine quantum use cases and define metrics to evaluate submissions.

- Build partnerships and onboard quantum professionals.

- Contribute to product-market fit and platform growth.

- Assist with hackathons and write technical articles on challenges.

Requirements:

- Experience in quantum algorithm development (digital & analog).

- Experience mentoring at hackathons.

- Proactive and detail-oriented.

Bonus: PhD in quantum physics. Perks: Competitive salary, equity options, workspace at Station F (Paris).

Apply by sending your resume, intro, and portfolio to https://quantum.jobs/jobs/85500519-quantum-computing-expert.

Help shape the future of quantum computing at Aqora!

Twikey | Gent, Belgium (Hybrid) | Full-time | Senior Back-end Engineer

Twikey builds software for automating recurring payments: digital contract and mandate signing, SEPA direct debit processing, invoicing logic, and integrations with European banks and accounting systems. We’re growing and looking for a Senior Back-end Engineer to help improve and extend the core of our platform.

You’ll work with the CTO and a small engineering team on real production challenges: performance, correctness, data modelling, integration workflows, and system reliability. The role is hands-on and technical: clean code, maintainability, and measurable improvements matter.

Stack: Java + Spring, Go, PostgreSQL, REST APIs, Linux. (Front-end uses Angular/Svelte.)

What you’d work on • Improving backend performance (queries, caching, algorithms, data flows) • Designing and implementing new backend features • Keeping the codebase clean, testable, and maintainable • Working on integrations with banks and third-party systems • Reviewing code, proposing improvements, reducing complexity • Contributing to release processes in an Agile environment

Requirements • 5+ years professional experience with Java + Spring • Strong experience with PostgreSQL • Comfortable improving performance and understanding system behavior underload • Writes clean, structured, testable code • Communicates clearly and works well in a small team • Fluent in at least two of: Dutch / English / French • Nice to have: API integrations, webservices, Linux, fintech/banking domain knowledge

If you’re motivated by clean code, stable systems, and performance improvements, we’d like to hear from you. Apply: https://www.twikey.com/jobs/?utm_source=hn

Jam.dev | Staff Fullstack Engineer & AI Product Engineer | Typescript/React | Remote (+ in person in SF, Austin, NYC) | Full-time

Dev tools company with 200,000+ users in 2 years. $10M in funding from Vercel CEO, GitHub CTO, Cloudflare CEO, etc.

We’re building a flight recorder for web apps – so anyone can report issues to engineers in a way that's actually debuggable (w/ console, network, websockets debugger, etc).

Small, senior team – several ex-engineering directors turned ICs (mostly ex-early Cloudflare). Looking for staff-level engineers with experience building highly performant front-end apps.

Stack: React/Typescript and MobX (MST) on the frontend, and Node/GraphQL across our backend.

The challenge ahead: Scaling. Usage 10x’ed last year, and our users are in 176 countries, on all sorts of devices, network conditions, etc. Our bar for quality is high.

As a dev tool, developers at Jam are directly connected and involved with the product. Your usage of the product will directly inform the direction of Jam’s future.

Apply here (we read and respond to every submission): https://jam.dev/careers

ElectricSQL | https://electric-sql.com | Founders Associate | FT | US based, SF Bay Area preferred (working with remote team) | $140-160k + equity

Electric is a devtools startup. We solve reactive, real-time sync across client and server [1]. We have a large developer community, millions of downloads a week, high profile customers and top-tier investors. Our software is built into platforms like Firebase, Prisma and TanStack. Our cloud product is growing 7% week on week.

This is a generalist, operational role. Working directly with the founders and founding team [2] to handle company operations as we grow into and through the Series stages.

It would be ideal if you're based in the San Francisco Bay Area. If not, you need to be able to travel there every month or so. You also need to travel to Europe for team on-sites a few times a year.

More information and application details here: https://electric-sql.com/about/jobs/founders-associate

[1] https://electric-sql.com/blog/2025/07/29/local-first-sync-wi... [2] https://electric-sql.com/about/team

WireScreen (Series A) | Senior Software Engineer | NYC - hybrid | Full-time | $165k-$210k base + equity | https://jobs.ashbyhq.com/wirescreen/89e08ab3-01ed-4296-9459-...

WireScreen is a fast-growing Sequoia-backed Series A startup building the go-to open source intelligence platform for navigating global supply chains and China-related risk. While China maintains some of the world’s most detailed corporate ownership records, the real challenge is connecting the dots. That’s where we come in—surfacing the networks, relationships, and financial ties behind companies to support national security, compliance, and regulatory oversight.

We’re looking for senior software engineers to build our data platform and help us ingest and model messy, unstructured data into insights and actionable intelligence. At the heart of this is a 50m+ entity knowledge-graph with 200m+ relationships represented - and we need your help to build a system that can scale this up by an order of a magnitude. Today, we mostly use Python, Postgres, Airflow and Pyspark.

If you have prior startup experience, can bring strong Python (PySpark is a big plus) experience and have previously worked with TB-scale data sets - we’d love to talk to you.

Apply here: https://jobs.ashbyhq.com/wirescreen/89e08ab3-01ed-4296-9459-...

Or you can reach out to me directly at Email is hidden - I lead recruiting here at WireScreen, but if I don't know the answer I'll ping our engineering folks and come back to you fast.

SmarterDx | 150-250k+ + equity + benefits | Remote (US only) | Multiple roles | https://smarterdx.com/careers

We build clinical AI that empowers hospitals to analyze the complete record of every patient to fully capture the value of care delivered. Founded by physicians in 2020, our proprietary AI platform understands the nuances of clinical reasoning, enabling hospitals to accurately reflect every patient visit for fair reimbursement. By doing so, hospitals can recover millions in earned revenue, enhance care outcome and quality metrics, and optimize healthcare operations.

The current team is very high functioning (MD + data scientist combos, former ASF board member, Google and Amazon engineers, Stanford LLM researchers, etc.) and initially scaled the company to $1MM+ in contracted revenue without raising capital.

SmarterDx recently became part of Smarter Technologies as part of a $1.1B deal by New Mountain Capital, a leading growth-oriented investment firm. We have been backed by top investors including Floodgate (Lyft, Twitch, Twitter), Transformation Capital, and Bessemer for a total of $71M, including our $50M Series B, and are experiencing an incredible growth trajectory customer and revenue wise with no signs of slowing down with 150% YoY headcount growth! This time last year, we were at ~110 employees, and are above 280 as of today!

We are looking for: Security Engineering Manager - Staff and Senior SWEs, Full Stack and Backend focused - Staff ML Engineers - Data Science Managers - Staff Data Scientists - Senior Data Analysts - Senior Product Managers - More!

We have PMF, and it's time to scale! For more and to apply, see https://smarterdx.com/careers

klarasystems.com | OpenZFS Developer | REMOTE | Full-time Contract

We successfully hired from HN in the previous round and are looking for another OpenZFS Developer (3+ years of experience) to join our team!

Klara Inc. provides development & solutions focused on open source software and the community-driven development of OpenZFS and FreeBSD. We develop new features, investigate/fix bugs, and support the community of these important open source infrastructure projects. Some of our recent work includes major ZFS features such as Fast Deduplication (OpenZFS 2.3: https://github.com/openzfs/zfs/discussions/15896) and AnyRAID: https://github.com/openzfs/zfs/pull/17567.

We’re looking for an OpenZFS Developer with:

- Strong C programming skills and solid understanding of data structures

- Experience with file systems, VFS, and OS internals (threading, locking, IPC, memory management)

- Familiarity with ZFS internals (DMU, MOS, vdevs, ZPL, datasets, boot environments)

- Ability to work across Linux, FreeBSD, or illumos environments

Previous upstream contributions to OpenZFS or other open source projects are a big plus.

Submit an application through our site: https://klarasystems.com/careers/openzfs-developer/

Tendavo | Founding Engineer | Stockholm | On-site (Hybrid) | Full-time | Visa | https://tendavo.se/

Tendavo helps SMEs win public procurement tenders - a massive, neglected market. We are bootstrapped, profitable and have around 100 happy customers without taking a dollar of external investment. We are based at the SSE Business Lab, where companies such as Klarna and Legora originated.

We spent the last year validating PMF. The CTO has built the core foundation, and now we are hiring a Founding Engineer to architect and code the rest of the platform side-by-side.

The Team: CEO: ex-McKinsey | CTO: +13 years of startup experience, previously founded a data startup scraping 50m pages/week.

The Role: You will work side-by-side with the CTO to build the platform from the ground up. You get full technical ownership to design agents and LLM workflows that replace our manual routines. This is a high-agency role: We have validated Product-Market Fit; your job is to scale it.

Tech: Python (AI & core systems), PostgreSQL, TypeScript, GCP

We offer equity, mentorship from a technical team, and a clear path to VP/Head of Engineering.

Reach out to me directly at Email is hidden - we'd love to hear from you!

Checkly | Engineering | REMOTE | Full time | https://www.checklyhq.com/

Checkly helps engineers build reliable products by unifying testing, monitoring and observability. OpenTelemetry, Playwright, and Monitoring as Code are our foundation for unifying performance and reliability. In 2024, we raised $20M in Series B funding from Balderton, CRV, and Accel to take things to the next level.

-Senior Backend Engineer (Remote, UTC-3 to UTC+3)

See the full description and apply here (and mention HN): https://jobs.ashbyhq.com/checkly?utm_source=hn

Fanvue | Senior Software Engineer – Real-Time Chat (TypeScript/Node preferred) | Remote (UK/EU preferred)

Fanvue is building the next generation of creator monetization and self-serve AI tools. Our real-time chat system is the core of the product, driving creator–fan interactions and high-volume AI-enabled messaging.

We’re hiring a senior engineer to help own and scale this mission-critical service: low-latency distributed systems, event-driven APIs, performance at scale, and foundations for Always-On AI. Not CRUD — real systems work.

Our stack is TypeScript/Node/React, but we welcome exceptional engineers from any background who are sharp critical thinkers.

https://jobs.ashbyhq.com/fanvue.com/0ca92d74-bfac-4d04-a319-...

Email Email is hidden

Fanvue is for Everyone.