Superset (YC P26) | Founding Engineer, Founding Design Engineer | San Francisco | ONSITE | Full-time | $175K-$225K + 1.0-1.5% equity | https://superset.sh/careers

We're building a self-improving IDE for running coding agents in parallel. Tens of thousands of engineers use it as their main IDE, at companies like Netflix, DoorDash and Wix. It's source-available: https://github.com/superset-sh/superset

We're 4 people, including 3 ex-YC CTOs. The work goes from the pty and stream transport up to the UI, all TypeScript. You'd own big features end to end and likely ship something in your first week.

Interviews: a 15 min call, 1 hr TypeScript, 1 hr system design, then a week with us in SF. We tell you where you stand within 48 hours of each step.

Email me: kiet@superset.sh

Cleverbase | https://cleverbase.com/ | The Hague, Netherlands | ONSITE (hybrid) | Full-time

Cleverbase runs an API platform for online trust: qualified e-signatures, PKI, digital identity and high-assurance identity onboarding for European organisations. We’re now building towards the EU Digital Identity Wallet and the European Business Wallet. Helping customers design and ship their solutions on our platform matters as much to us as building the platform itself.

As a Qualified Trust Service Provider under eIDAS, what we ship has to be demonstrably correct, auditable and secure, and we still deploy frequently. We go beyond compliance by applying modern cryptography to better protect personal data, because our mission is everyone secure online.

Stack: JVM (Scala with Cats/Cats-Effect, http4s, fs2, doobie), gRPC, Postgres and HSMs for the trust services; TypeScript (React, NestJS, oRPC, Drizzle, Playwright) for web; standards like JSON/XML/PDF signatures and OpenID. Experience with this exact stack isn't required, but interest in cryptography or digital identity is.

Roles currently available:

Web Engineer (Medior): https://cleverbase.com/en/careers/web-engineer-medior/

Web Engineer (Senior): https://cleverbase.com/en/careers/web-engineer-senior/

Solution Engineer (Medior): https://cleverbase.com/en/careers/solution-engineer-medior/

Apply: email recruitment@cleverbase.com with your CV and a short note, and mention that you found us through this HN post from the CTO.

LiveKit|http://livekit.io/| VoiceAI | webRTC | Remote | Full Time LiveKit is building the infrastructure layer for the voice-driven era of computing. Our platform gives developers everything they need to build, test, deploy, scale, and observe agents in production. Hiring:

>> Product Engineer | NAMER, EMEA, APJ (Remote) or SF (Hybrid): https://jobs.ashbyhq.com/livekit/463e2769-bb85-4429-96a3-3a1...

>> Forward Deployed Engineer | United States (Remote): https://jobs.ashbyhq.com/livekit/b889ef16-4d5d-4b71-b0a9-682...

>> Forward Deployed Engineer | United Kingdom (Remote): https://jobs.ashbyhq.com/livekit/2b51446f-f78f-41da-91f9-41d...

>> Developer Success Engineer | United Kingdom (Remote): https://jobs.ashbyhq.com/livekit/5d4461df-f7b6-4f34-a084-5ab...

>> Software Engineer, Agents | NAMER, EMEA, APJ (Remote) : https://jobs.ashbyhq.com/livekit/1757f49e-7e19-4c45-85f7-e46...

Co-founders: Russ d'Sa (CEO) https://www.linkedin.com/in/russelldsa/ & David Zhao (CTO) https://www.linkedin.com/in/davidzhao/

Check out our blog: https://livekit.com/blog

Our other roles: https://jobs.ashbyhq.com/livekit?utm_source=1bpyr8q375

Buoyant | Senior Software Engineer – Kubernetes / Distributed Systems | REMOTE – US / Canada / Brazil / Europe (CET-compatible) | Full-time

Buoyant is the company behind Linkerd, the CNCF-graduated service mesh for Kubernetes. We’re a small, fully remote engineering team building a new cloud-native infrastructure product.

We’re looking for a senior, self-directed engineer who has built production infrastructure software and is comfortable working deep in the Kubernetes ecosystem.

Relevant experience may include Kubernetes APIs, controllers/operators, CRDs, reconciliation systems, distributed systems/control-plane engineering, Go and/or Rust, gRPC, networking, service mesh, security, identity, or other cloud infrastructure.

This is a hands-on role with significant architectural ownership on a small engineering team.

Location: Remote – US, Canada, South America, or Europe with Central European Time-compatible working hours.

Interested? Email scott.deakin@buoyant.io with “HN – Buoyant Control Plane” in the subject and include your LinkedIn, GitHub, or résumé.

Coast | https://coastpay.com/ | Full-time | Hybrid in New York City, NY

Coast is re-imagining the trillion-dollar U.S. B2B card payments infrastructure, with a focus on the country’s 500,000 commercial fleets, 40 million commercial vehicles, and many million commercial drivers. Coast's mission is to deliver modern digital experiences, affordable and transparent financial services products at a transformational scale, and to improve working lives in one of the country’s biggest industry sectors.

Coast is competing and winning with software, and we are building a world-class R&D team.

Roles currently available:

Lead Data Engineer: https://job-boards.greenhouse.io/coast/jobs/6215755004

Product Engineer, Full-stack Engineer (Mid-level/Senior): https://job-boards.greenhouse.io/coast/jobs/4000170004

Product Designer (Senior/Staff): https://job-boards.greenhouse.io/coast/jobs/5850295004

Staff Product Manager: https://job-boards.greenhouse.io/coast/jobs/6212510004

Mastra | AI Engineer | REMOTE (AMER or EMEA time zones) | Full-time Mastra is the open-source TypeScript framework for building AI agents (agents, workflows, memory, evals, tracing). From the team behind Gatsby, YC-backed, https://github.com/mastra-ai/mastra

Why: We’re starting to build more and more agentic features into Mastra: Trace intelligence, and we’re working on various Agent Learning features to automatically self-improve agents (Autoevals + Suggestions, Rollouts). In addition, we’ve been increasingly running Mastra primitives like memory on industry-standard benchmarks and using the results to fine-tune configuration.

You have: Shipped agents and agentic applications into production Tuned and tweaked them to improve accuracy You need to be able to benchmark your results against existing datasets, or intelligently creating

Apply: {https://jobs.ashbyhq.com/mastra/531a3fe8-556f-4b83-bee7-2037...} We get back to everyone.

BREAKFAST Studio (kinetic art) | Senior Technical Program Manager · Senior Electrical & Firmware Engineer | Brooklyn Navy Yard, NYC | ONSITE | Full-time | https://theartistbreakfast.com

We're the studio behind the artist BREAKFAST. We design and build his robotic sculptures for the Venice Biennale, Rockefeller Center, the Fontainebleau in Las Vegas, Tiffany & Co. in New York, Dubai and Seoul, and private collections around the world. The largest is the world's largest kinetic sculpture: 53 feet wide, nearly 3,000 motorized tiles driven by live wind and tide data, aboard a Royal Caribbean cruise ship. No screens, no projectors. Each piece is hundreds to thousands of motors on an RS-485 bus under a Linux host, built to run for a decade with nobody watching it, and every board, line of firmware and bracket is designed and built by 17 people in our Brooklyn studio. See them move: https://theartistbreakfast.com/works

Senior Technical Program Manager: the artist's person on the ground with a six-person senior design and engineering team. You own every schedule in Asana, pressure-test estimates, run the weekly rhythm, flag slips the day you know, and deal with clients through install. Hardware+software TPM or producer background (robotics, consumer hardware, instruments), 8–12 years, fluent across at least two of mech/EE/firmware/software/ID. $150–200k base + profit share.

Senior Electrical & Firmware Engineer: own the electronics end to end. KiCad schematic→layout→revision, stepper/BLDC drive tuning, RS-485/Ethernet bus architecture, embedded C, production test fixtures, field-failure analysis. 10+ years shipping electronics you personally owned; real motor control; power/EMI/thermal; prototype→CM. $140–200k base + profit share.

No art background needed. We care whether you're sharp, can own a thing alone, and write plainly.

Apply at https://theartistbreakfast.com/jobs and mention HN. The "what makes you right for this" box is the part we read.

I'm applying for the Growth Lead / Expansion & Lifecycle role, specifically the expansion + lifecycle automation piece.

Concretely, for the fixed-fee milestone structure:

Milestone 1 (week 1-2): instrument the activation and retention funnel end to end - event taxonomy, tracking, and a dashboard you can actually make decisions from. Deliverable is a written diagnosis with the three highest-leverage lifecycle drops and what each is worth in ARR.

Milestone 2 (week 3-6): build the lifecycle automation itself - onboarding email/nudge sequences, dormant-user winback, and cancellation-save flows, wired to the product so behavior triggers them rather than a manual send.

How I would work: start by reading the existing signup flow and instrumenting before changing anything, so milestone 2 is driven by observed drop-off rather than my assumption of where it is. I would want to agree the milestone boundaries before starting either.

Two questions so I can quote accurately: what is the current activation rate and the trial-to-paid conversion you are working from? And is the fixed fee negotiable against a smaller first milestone if the diagnosis itself is useful?

To be direct about fit: I am proposing scope and milestones rather than claiming a track record I cannot show you here.

Flowstate (London, UK) — Founding Engineer — TypeScript / React / Postgres / AI

Flowstate (https://www.flowstate.inc) is building infrastructure for the emerging human + AI workforce.

Companies are rapidly adopting Claude, ChatGPT, Cursor, Copilot and internal agents, but most still have very little idea what that AI is actually doing, what it costs, what work it contributes to or whether it is making the organisation better.

We’re building the systems underneath that: an AI router and proxy, native macOS and Windows apps, attribution infrastructure that connects AI activity back to work and tools for understanding how humans and AI should operate together inside a company.

We’re a small early-stage team and this is a genuinely broad founding engineering role. You’ll work across product, infrastructure, integrations, desktop apps, AI systems and whatever else needs building. We’re looking for someone who has worked in an early-stage startup before and actually enjoys the pace, ambiguity and ownership that comes with it.

Details: - Location: London, UK - Working style: Hybrid, with regular time together in the office - Salary: £100k–£120k - Equity: 0.5%–1.5% - Benefits: Gym membership, breakfast and flexible hours - Role: Full-time

Apply: https://www.flowstate.inc/careers/

Manifest | https://www.manifestcyber.com/ | REMOTE (US) | Full Time

Manifest is on a mission to secure the global software and AI supply chain. Our platform automates discovery and risk analysis across the software and AI systems organizations build and buy—SBOMs, AIBOMs, vulnerabilities, and third-party risk. Founded by alumni of DoD, CISA, and Palantir, we're backed by First Round Capital, Ensemble VC, Homebrew, and BoxGroup, and we work with the US Air Force, DHS, Global 2000 companies, and critical infrastructure organizations.

Roles currently available:

Senior Backend Application Engineer | $150K–$210K + equity — Build user-facing product features and the services behind them on our next-generation platform. TypeScript/Node, Go, Python, MongoDB. Looking for engineers who've shipped features end-to-end at B2B SaaS companies and care about both the product and the architecture: https://job-boards.greenhouse.io/manifest/jobs/4398657009

Senior Infrastructure Engineer | $150K–$210K + equity — Own how Manifest gets deployed everywhere our customers are: cloud, on-prem, and air-gapped. Kubernetes, Terraform/Helm, CI/CD with security built in. Bonus for FedRAMP/government or air-gapped packaging experience (Zarf, etc.): https://job-boards.greenhouse.io/manifest/jobs/4399435009

More listings here: https://job-boards.greenhouse.io/manifest

US work authorization required. If you came from this thread, please mention HN in your application.

Flow Traders | Research Engineer | Hong Kong | Full Time | Visa | Relocation Flow Traders is a leading proprietary trading firm with an entrepreneurial and innovative Tech culture at the heart of its business. We are looking for Research Engineers in our Hong Kong office. Join us build and scale the research framework behind our systematic trading models. You’ll work closely with Quantitative Researchers, drive end‑to‑end ML pipelines, and shape global standards for data‑driven model development. Research Engineers have joint responsibility for conducting research and delivering models. You’ll thrive if you have: - 8+ years in ML / Data Science / Research Engineering (Postdoc/Faculty can count towards this); - Strong Python and libraries such as Ray, numpy, PyTorch, and pandas; - Solid math/stats background; - Experience with modern dev practices & cloud technologies. If you're interested, apply here: https://www.flowtraders.com/careers/job-description/7431246

Flow Traders | C++ Senior Software Engineer | Hong Kong | Full Time | Visa | Relocation We are looking for a Senior C++ Software Engineer, you'll help design and optimize next-generation market data and execution platforms powering systematic trading across hundreds of venues. The role covers high performance market data ingestion and order execution, building and optimizing trading systems. To succeed you will need to have: - 5+ years of C++ experience in HFT/ financial sector -Strong knowledge in one or more APAC markets If you are interested, apply here: https://www.flowtraders.com/careers/job-description/8212740

Or if you'd like to see other roles at Flow Traders, please check our careers website: https://flowtraders.com/careers/

Freeform (http://freeform.co) | Software Engineers | Full-time | Onsite | Hawthorne, CA (Los Angeles County)

Freeform builds AI-native manufacturing systems that unify software, hardware, and physics to produce industrial-scale parts at the speed of human ideation. By treating manufacturing as a single integrated system, we unlock a new era of innovation where complex hardware is designed, built, and scaled without limits. This isn’t just an improvement; it’s a leap forward in how complex metal parts are made, with the ability to revolutionize industries like aerospace, defense, automotive, energy, and beyond. We are backed by top VCs including NVIDIA’s NVentures, Founders Fund, Threshold Ventures, and Apandion.

It’s a small, tight-knit team and you’d have the opportunity to own significant and impactful greenfield projects throughout the entire development lifecycle and much more. Our software team comes from the likes of Google, SpaceX, and Apple, and believes in taking a first principles approach to solving hard problems.

A glimpse into our software landscape - https://www.youtube.com/watch?v=nFWQArUkd5I

Our feature in TechCrunch announcing our $67M Series B Raise! https://techcrunch.com/2026/02/19/freeform-raises-67m-series...

Current open positions:

+ Principal Software Engineer - https://grnh.se/27ajbj9k3us

+ Senior Full Stack Engineer (MES) - https://grnh.se/vp93v0cu3us

+ Senior Software Engineer - https://grnh.se/m2l08z853us

+ Senior Software Engineer (Embedded) - https://grnh.se/hb838bth3us

+ Senior Software Engineer (Full Stack Enterprise) - https://grnh.se/z1hbnfo33us

+ Software Engineer - https://grnh.se/hnwff2s23us

+ Software Engineer (Embedded) - https://grnh.se/acaazaw13us

+ Software Engineer (Full Stack Enterprise) - https://grnh.se/26cvuixl3us

depproof | Part-time B2B Sales Lead | REMOTE (US) | Part-time | Equity + commission | https://depproof.com

Most of the code a team ships is third-party, and scanners flag hundreds of vulnerabilities in it. depproof tells you which few attackers are actually exploiting, so you fix those first. It runs inside your own environment, and your code never leaves.

We're a small, founder-led company looking for a part-time sales lead who has sold to security or engineering teams: running first conversations, shaping the pitch, and closing our first customers.

You may reach out to me at: prasadv at depproof.com

Empower Pharmacy is hiring engineers to work on event-driven, distributed systems that actually run a real-world business (regulated pharma), not ad tech or yet another CRUD SaaS.

We just filled one Staff Engineer role directly from my last LinkedIn post (thanks to everyone who shared/applied). Now we’re expanding the team:

- 1 Staff Software Engineer - 4 Senior Software Engineers - 4 Software Engineers (new grad / early career)

All roles are US-based (remote within the US).

We’re a small team owning the core platforms that run manufacturing, operations, and logistics. A lot of the work is greenfield or foundational: distributed systems, workflow orchestration, reliability/observability, and making it all scale in a domain where correctness actually matters.

Tech stack: Java / Spring Boot, React / Next.js, Azure (Service Bus, Kubernetes), SQL Server. Event-driven, service-oriented architecture at enterprise scale. We use AI-assisted development heavily in the workflow (not as a bolt-on), so if you already lean on tools like Copilot/LLMs, you’ll be at home.

We’re setting up a round-robin “Virtual Interview Day” early next week so we can run both interview rounds in a single day for candidates who advance. The process is straightforward: practical discussions, system design, and code; no brainteasers.

If you: - like thinking in terms of systems and failure modes, - are comfortable across the stack (or want to grow there), - and want your work to have direct impact on how a real business operates,

then I’d like to talk.

Job description and application: https://lnkd.in/g926gzEx If you’d rather skip the form, email me or DM me and include a GitHub/LinkedIn/resume and a short note on what you’ve built.

Fig | Founding Engineer | San Francisco (hybrid) | $220k-$280k + meaningful equity

Fig is hiring its founding engineer.

Fig builds software for industrial ingredient processors, the companies between farmers and the food brands you buy. Most of them still run on paper binders: production schedules, sanitation checks, quality logs. Tech has mostly ignored them.

This is a high-ownership seat. You'll work directly with the founders, who come from food, to build a platform that pulls together fragmented food-industry data, then the AI layer on top of it. Think Glean for the food industry. Customers who signed on as design partners a year ago are still here and still shape the roadmap.

Stack: Kotlin, React, TypeScript, GCP, Postgres, Terraform.

Fig is collaborating with Scout (https://www.scoutintro.com) to meet engineers. Book a coffee chat to learn more: https://calendly.com/lucia-scoutintro

Oscilar.com | Sr/Staff Software Engineers, Data Scientist, FDE, PM| REMOTE (US/Canada/Brazil/Poland/UK/India) Full-time AI Risk Decisioning™ platform that helps organizations manage onboarding, fraud, credit, and compliance risks

Open roles: - Sr./Staff Analytics & Data Architecture Engineer (US/Canada) - Sr./Staff Java Backend Engineer (Brazil/Poland/India) - Staff Web SDK Engineer (US/Brazil/India/Canada/Poland/UK) - Data Scientist (US/Canada) - Machine Learning Engineer (US/Canada) - Forward Deployment Engineer (Brazil/US) - Product Manager AML (US/Canada) - Product Manager Device and Behavior (US/Canada) apply at: https://jobs.ashbyhq.com/oscilar?utm_source=HackerNews

Purchasely | https://www.purchasely.com | Senior iOS SDK Engineer | Paris, France | REMOTE (France) | Full-time (CDI) | Fluent French and English required | [€60k-€70k + BSPCE]

Purchasely is an in-app monetization platform: app teams design, launch and A/B test paywalls and onboarding screens without shipping an app update. Our SDKs (iOS, Android, Flutter, React Native, Cordova) are embedded in our customers' apps, so if our SDK crashes, someone else's app crashes. Stability, binary size, backward compatibility and clean public APIs come first.

You'll be a hands-on engineer on a small mobile team, owning the native iOS SDK: [StoreKit 1/2, UIKit/SwiftUI rendering, public API design, release process]. You'll also work directly with customers' engineering teams on tricky integrations, so you should enjoy reading other people's code and explaining yours.

We're looking for [5+] years of iOS with strong Swift, ideally with experience shipping a library or SDK used by third parties. Fluent French is a must: the engineering team works in French daily. Professional English is a must: our customers are located worldwide and support is in English, we also have coworkers from all over the world.

Process: no take-home. One 1h30 live technical session during the interview.

Direct applicants only, no agencies.

Details: https://purchasely.notion.site/Senior-iOS-SDK-Engineer-ee63d...

Coder | https://coder.com/ | Multiple roles | Multiple locations | Full-time

Coder is an AI software development company leading the future of autonomous coding. We empower teams to build software faster, more securely, and at scale through the collaboration of AI coding agents and human developers. Our mission is to make agentic AI a safe, trusted, and integral part of every software development lifecycle.

Coder’s self-hosted Agentic Development Environment (ADE) is the foundation for deploying agentic AI in the enterprise. It provides a secure, standardized, and governed workspace to deploy autonomous coding agents alongside human developers, accelerating innovation while maintaining control and compliance. Coder's isolated, policy-driven environments improve productivity, cut cloud costs, and reduce data risks. Developers transition to AI at their own pace using their own tools. Platform and security teams can govern, audit, and manage a great developer experience at scale.

Check out our OSS product with 100k+ stars on GitHub! https://github.com/coder

All positions are fully remote in the countries listed unless otherwise specified.

[1]Customer Support Engineer • Poland • Full time

[2]Senior Software Engineer (Multiple Teams, Europe) • United Kingdom; Ireland; Poland • Full time •

[3]Senior Software Engineer (Multiple Teams, North America) • United States; Canada • Full time

[4]Software Engineer (Enterprise Experience, Backend) • Europe • Full time

[5]Software Engineering Manager (Agentic Engineering) • United Kingdom; Ireland; Poland • Full time

[6]Software Engineering Manager (Core Workspaces) • United States; Canada • Full time

[7]Staff Software Engineer (Agentic Engineering) • United Kingdom; Ireland; Poland • Full time

[8]Staff Software Engineer (AI Governance) — Research & Development • United States • Full time

Cloudflare | Senior Systems Engineers – Basin (Pipelines, SQL, Catalog) | Austin, TX / Seattle, WA / London, UK | ONSITE | Full-time | $185k–$254k + equity (US range, varies by location)

  Last week we announced the General Availability of Basin (https://blog.cloudflare.com/cloudflare-basin/), a serverless data platform built on Apache Iceberg and R2. It has three parts:
  Pipelines (streaming ingestion and SQL transforms), Catalog (a managed Iceberg REST catalog with table maintenance) and SQL (a distributed query engine).

  We also launched K2 (https://blog.cloudflare.com/cloudflare-k2-streams/), a durable event stream built on R2 that started out as the ingestion buffer behind Pipelines.

  We're hiring for two roles:

  Basin Pipelines: work on the streaming engine (built on Arroyo) and K2. You need experience writing the core of a storage or streaming system, and strong Rust or C++.
  https://job-boards.greenhouse.io/cloudflare/jobs/7093840

  Basin SQL and Basin Catalog: work on the query engine (Rust, DataFusion, Arrow, Parquet) and the Iceberg catalog. You need 6+ years in distributed systems. Experience with Rust and query or storage
  engines is a plus. https://job-boards.greenhouse.io/cloudflare/jobs/8030240

  Apply through the links, or email me at yevgen at cloudflare dot com with "HN" in the subject.

RealResponse | Product Engineer | REMOTE (US) | Full-time | https://www.realresponse.com

We build software used across college athletics, professional sports, higher education, and other organizations, from reporting and compliance to live event operations. We're a team of < 15 people, with no venture capital, and profitable. This means we get to make decisions for our customers and our team, not for investors. Rails is at the core of everything we build, and we keep reasonable hours and a codebase we're proud of.

We're looking for someone who solves problems across the board: building and improving our applications, shaping products, internal tools, fast prototypes, and the systems that keep quality and security high. You'd own problems end to end, from understanding what the customer actually needs to shipping the fix.

On the AI side, we want someone who knows how to:

- Evaluate new models as they ship, and pick the right one for the job (fast and cheap vs. most capable)

- Design agents and multi-agent workflows with tool use, and know when a simpler approach is better

- Build retrieval that stays accurate as the underlying content changes (RAG, embeddings, search)

- Measure quality with evals and observability, so changes are proven rather than guessed

- Keep AI features fast, reliable, and cost-effective under real production load

- Handle AI security properly: prompt injection, data isolation between customers, and sensitive data

Stack today: Rails 8, Hotwire, Hotwire Native, Postgres, AWS. Rails experience helps but isn't required. What matters more is a strong grasp of solid engineering practices and principles, and the judgment to use the right tools to solve the problem.

To apply: email jobs@realresponse.com with subject "Product Engineer: [your name]". Include a link to something you built, a few sentences about a problem you solved end to end, your salary expectations, and your CV.