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.

Quantum Minds | Senior Software Engineer – LLVM/Fuzzing/Program Analysis | Contract | REMOTE (US) | Full-Time

Quantum Minds is hiring a senior engineer to support a modern analysis pipeline involving compiler tooling, program analysis, fuzzing, and automation. The work includes preparing the codebase for future open‑source release.

You’ll work on: • LLVM IR generation + metadata • LLVM pass development (IR cleanup, MMIO handling, fuzzability improvements) • Fuzzing harnesses + campaigns (libFuzzer, AFL++, Honggfuzz) • Crash triage, deduplication, automated reporting • Python tooling + CI improvements • Open‑source readiness (licensing, reproducible builds, repo migration)

Requirements: • Strong C/C++ systems engineering • Hands‑on LLVM IR + pass development • Fuzzing + sanitizers experience • Crash analysis + software‑security fundamentals • Python + Git workflows • Microsoft ecosystem experience strongly preferred

Nice to have: • Firmware/embedded (MMIO, HALs, rehosting) • CodeQL or other static‑analysis tooling • LLM/agent integration experience • CFG/SSA/dataflow background • Open‑source contribution experience

Remote contract role. Work directly with a team preparing a major analysis pipeline for future open‑source release.

Please send your resume + a short cover letter to: jobs@quantumminds.com

PostHog | Full-Time | Technical CSMs, Product Managers, AI Research Engineer | REMOTE (all remote) | Hiring GMT-8 to GMT+2 | PostHog makes your product self-driving. * we have a public handbook (posthog.com/handbook) if you want to learn how we work, pay and more in complete detail.

* we are growing through more autonomy and transparency not through process.

* we have a ton of scale and a bunch of super interesting technical problems to solve

* we're building 20 more products over the next couple of years, so you could end up building one of those

* public compensation calculator! see immediately what you'd get paid

* we're hiring: ai research engineer, technical customer success managers (americas & emea), product manager, SREs (americas), clickhouse engineer, security engineer, and more.

https://posthog.com/careers

Rivian Automotive | Senior AI infra, Machine Learning Egineer | Full - Time | Hybrid | London | - https://careers.rivian.com/careers-home/jobs/24737?lang=en-u...

The ultimate goal of Rivian's new AI Hub in London is to accelerate the development of our Autonomy Platform to achieve higher levels of autonomous capability, making our vehicles safer, more technologically advanced, and "time-restoring" for our users.

About us in general: We’re a US-based EV company building groundbreaking electric trucks, SUVs, and commercial vehicles — and an integrated ecosystem of hardware, software, and services in order to keep the world adventurous forever.

You can also find more open roles here: https://careers.rivian.com/careers-home/jobs?sortBy=relevanc...

Comograph | Go-To-Market (GTM) Specialist | Remote (Global / US/EU/Africa time zones welcome) | Full-time / Contract

About Comograph: We are building an engineering recruitment and skill verification platform focused on evidence-based hiring through task-based evaluations. We help tech teams eliminate resume noise and evaluate software engineers on real-world coding and architectural capabilities.

The Role: We are looking for a hands-on Go-To-Market (GTM) Specialist / Growth Lead to own our early customer acquisition strategy, lead generation, outbound sales pipelines, and position Comograph in front of engineering leaders and talent acquisition teams.

What You'll Do:

Design and execute outbound B2B sales sequences targeting Engineering Managers, CTOs, and Technical Recruiters.

Build growth loops across developer communities, LinkedIn, and cold outbound channels.

Own early-stage sales discovery calls, demos, and customer onboarding feedback loops.

Craft compelling content, case studies, and messaging around evidence-based technical hiring.

What We’re Looking For:

Experience in B2B SaaS growth, outbound sales, or GTM strategy (experience in Developer Tools, HR Tech, or Recruiting SaaS is a huge plus).

Strong understanding of tech hiring pain points and developer workflows.

Comfortable with modern growth/sales stacks (CRM, email automation, LinkedIn outreach).

Self-starter who thrives in an early-stage, fast-paced setup.

How to Apply: Email your CV/LinkedIn and a brief note on how you’d approach GTM for a tech platform to ceo@comograph.com with the subject: GTM Specialist - Your Name.

Pairio (https://pairio.app) | Senior Swift Engineer | REMOTE (Europe) | 32-40h/week | Employee or freelance | $65k-$85k + equity

Pairio is a native macOS app for real-time screen sharing, built for people who work together. You share your screen, your teammate draws on it and takes over your keyboard. One click to call, no link, no invite. We use it every day to build it.

You'd work on pixel-perfect screen sharing (capture, encode, transport, rendering), one-click calling (WebRTC), drawing and remote control, privacy (app masking, encryption) and latency. The Swift app talks to a Rails backend, so bonus points if you're comfortable on both sides.

We're looking for deep native macOS or iOS experience in Swift, a real feel for UX and pixel-perfect UI, and someone who enjoys owning large parts of a product in a small team. Please be based in Europe so we have real overlap for pairing.

We're four founders in Amsterdam running a healthy, profitable business. Stack: Swift, SwiftUI, AppKit, Rails. Flexible start.

Email us a bit about yourself, what you've built and why this interests you: hello@pairio.app, or see https://pairio.app/jobs

ParadeDB (YC S23, https://paradedb.com) | Database Internals Engineers, Platform Engineers | Remote or hybrid in San Francisco | Full-time

ParadeDB is a Postgres extension that delivers state-of-the-art search in Postgres. Our customers, including Alibaba Cloud, BILT Rewards, Modern Treasury (YC S18), and many others, rely on us to deliver the performance and feature set of dedicated vector databases/Elasticsearch natively in Postgres, simplifying their stack and day-to-day operations.

If you like systems, this might be for you. We're a team of 10, a Series A company based in SF but distributed across North America. We're hiring for database internals work (e.g., building the database in Rust) and distributed systems work (e.g., building the database-as-a-service platform in Go).

We're open-source at https://github.com/paradedb/paradedb.

Our technical blog: https://www.paradedb.com/blog

More info on roles: https://paradedb.notion.site/

CoreWeave | Specialist Field Engineers | full-time | hybrid, 3d/w commute to SF CA, Sunnyvale CA, or Bellevue WA

Join my illustrious team of Specialist Field Engineers at CoreWeave! Work hand in hand with the companies pushing the boundaries of AI, helping solve some of the hardest problems in high performance computing and large scale Kubernetes clusters. We're looking for people who have strong hands-on experience, not only using but often building the technologies in their specialization.

Specifically, we're hiring for one each of:

- Kubernetes: https://grnh.se/7j1kydde6us - Security: https://grnh.se/jxbek1o66us - Compute infra (GB200/GB300): https://grnh.se/q3hmrcf56us - Storage (NFS, S3): https://grnh.se/137kuvyv6us

Apply at the links above. Email tsaleh@coreweave.com with any questions.

SentiLink | https://www.sentilink.com/ | Engineering & Data Science | REMOTE, HYBRID, and ONSITE (UNITED STATES ONLY) | Full Time

Primarily hiring in the U.S. for more senior level roles.

We’re hiring across Engineering (Primarily Backend/Data Platform) and Data Science / ML roles. Hiring at Manager/Director level as well as Senior IC levels. We’re language-agnostic and hire for fundamentals.

Across the team you’ll see: • Python, Go, Rust, Scala • PostgreSQL, Snowflake • Kafka, Redis • Terraform, Kubernetes • ML: XGBoost, PyTorch, Feature stores, real-time scoring pipelines

If you love solving complex distributed systems challenges, building customer-facing ML products, or working on detection systems that must be both high-precision and low-latency, you’ll fit right in.

Roles are here: https://jobs.ashbyhq.com/sentilink?utm_source=hacker_news If you have questions, feel free to reach out directly at liz.woodfield at sentilink dot com.

At SentiLink, we stop identity fraud at scale. Our products protect banks, fintechs, marketplaces, and leading financial institutions from synthetic identity fraud, identity theft, and emerging threat. We analyze millions of applications while keeping real users moving fast.

We’ve seen tremendous traction and are growing extremely quickly. Our real-time APIs have helped verify hundreds of millions of identities, starting with financial services and rapidly expanding into new markets. SentiLink is backed by world-class investors including Craft Ventures, Andreessen Horowitz, NYCA, and Max Levchin.

SentiLink supports a variety of ways to work, ranging from fully remote to in-office. We operate as a digital-first company with strong collaboration across the U.S. and India. We maintain physical offices in Austin, San Francisco, New York City, Seattle, Los Angeles, and Chicago in the U.S. If you’re located near one of these offices, we would love for you to spend time in the office regularly. Some roles are hybrid or in-office by design.

We’re a small, high-impact team solving one of the most interesting and adversarial problems in fintech: how do you build systems that reliably determine whether a real human is on the other side of a financial transaction?