We're looking for an enthusiastic senior Typescript / React engineer for our clearing team.
Marex builds trading and risk systems for commodities, energy, and financial markets. You’d work on real-time trading platforms and various supporting apps. We're a global company, engineering is mainly in London and Chicago.
Apply here: https://www.marex.com/careers/career-opportunities/42de476ab...
Fullstory provides privacy-preserving session replay and analytics for websites and mobile apps. Our session replays are nothing short of magical - they look almost like a video of the user's screen (with private details redacted) - and the combination with analytics creates eye-opening insights.
We have several roles open in engineering & product. The backend roles are going to be working with Go (golang), gRPC, Solr, BigQuery/BigTable, Kubernetes (K8S/GKE), and more on Google Cloud Platform (GCP), and then the fullstack roles add in TypeScript & React for the frontend.
USA:
* Staff Product Designer - $152~185k - https://www.fullstory.com/careers/jobs/bbd018bf-cf92-47ea-85...
Colombia:
* Senior Software Engineer, Application Experience - Full stack: https://www.fullstory.com/careers/jobs/0fd0d966-1ab7-4639-a0...
* Senior Software Engineer, Data Management: https://www.fullstory.com/careers/jobs/729bbb6e-29ba-451a-9b...
* Senior Software Engineer, Data Ingestion: https://www.fullstory.com/careers/jobs/02430757-91ab-46e0-86...
* Senior Software Engineer, Behavioral Intelligence: https://www.fullstory.com/careers/jobs/847fba62-f7b7-46ae-92...
We also have a few more roles open in the US & UK in sales, finance, and customer support - see https://www.fullstory.com/careers/ for the full list and some general info.
For US roles, in addition to the listed pay ranges, you can expect regular raises & bonuses, equity, and benefits including: health insurance, 401k matching (Vanguard), annual learning stipend, unlimited PTO, and more. I take about 5 weeks vacation a year, in addition to ~3 weeks worth of company holidays (federal holidays + the week of Christmas to New Years.)
You also get a 5-week sabbatical after 5 years of employment - I took mine at the end of last year, and it was fantastic.
To apply, please submit your info on the website, and our recruiting team will get in touch with you. If you have questions, feel free to reply here or contact me directly. (I'm an engineer on the iOS team, but I'll do my best to answer questions.)
If you haven't heard of us before, we’re a quantitative trading firm that cares a lot about technology. This means building elegant solutions that scale well, never assuming that “best in market” is the same as “best possible,” and ensuring everybody has the resources needed to do their jobs well.
We're looking for folks in New York, London, Hong Kong, and Singapore for a variety of roles including, but not limited to:
- Data Engineers who can help us understand, clean, manage and share the data that guides our trading. At Jane Street, having a thorough and accurate understanding of data is at the core of everything we do -- https://www.janestreet.com/join-jane-street/position/6558007...
- Machine Learning Engineers with robust experience in machine learning and strong mathematical foundations. Machine learning is a critical pillar of Jane Street's global business. Our ever-evolving trading environment serves as a unique, rapid-feedback platform for ML experimentation, allowing us to incorporate new ideas with relatively little friction -- https://www.janestreet.com/join-jane-street/position/8056588...
- A Machine Learning Educator who will be instrumental in maintaining and growing our ML educational programs and classes, spanning topics such as an introduction to general ML, efficient use of AI assistants, our internal stack for training models, and how to reason about performance -- https://www.janestreet.com/join-jane-street/position/7449077...
- Software Engineers who are intimately tied into every area of our business. We are big believers in functional programming, using OCaml, a statically-typed functional programming language, as our primary development language. We also believe in the value of open source software, using it in our daily work and releasing hundreds of thousands of lines of our own code as open source -- https://www.janestreet.com/join-jane-street/position/4274288...
- Frontend Software Engineers who are passionate about user-interface design and typed functional programming. You would take part in the design and implementation of our next-generation of browser-based tools for operating our trading infrastructure -- https://www.janestreet.com/join-jane-street/position/6184529...
- A Programmer-Who-Writes, or a Writer-Who-Codes -- https://www.janestreet.com/join-jane-street/position/7604415...
- Production Engineers who spend time both developing software and providing high-quality support for software systems that are critical to our trading business -- https://www.janestreet.com/join-jane-street/position/5108180...
We are a proprietary trading firm operating in conventional as well as cutting-edge alternative markets. Our strategies run 24/7 without manual intervention powered by low-latency infrastructure and the latest machine learning techniques. We’re a meritocratic and lean team of highly-motivated scientists and developers and as such value technical ability more than politics: what matters is how good your code is, not how well you sell yourself. We spend no time dealing with clients, customers or investors and instead focus on growing our business by building better technology.
If you are a talented research engineer with strong developer skills who likes to work on low latency systems and large data science pipelines then please get in touch. We are also happy to sponsor exceptional talent.
You will be embedded within research and serve as primary resource for diverse software engineering challenges within the team. Your responsibilities will include efficiently processing extensive amounts of market data or improving the computational performance of live strategy code.
You can have a look at the role and apply via: https://apply.workable.com/queueco/j/A43D6B3C23/
Or directly write us an email to hn@queueco.com.
Tech used: AI, AWS, CTO, Docker, Support, Kubernetes, Machine Learning, PLC
Serac Group is a UK-based technology company leading the digital transformation of the property, planning, and local government sectors. Through our suite of platforms—including SeracTech, Ibex, Planda, and our upcoming launch Rafter—we are reshaping the future of property data, planning intelligence, and civic technology. We are one of the largest providers of AI and backend software to local government in the UK, supporting over 270 councils in managing planning applications. Our strategic partnership with Idox PLC helps us deliver scalable solutions across both public and private sectors.
More details and option to apply: https://devitjobs.uk/jobs/Serac-Group-Technical-Lead
At Gigs, we're building the operating system for mobile services - a platform that enables tech companies to seamlessly embed connectivity into their products. Klarna's US mobile plan is powered by Gigs!
We are looking for exceptional candidates, looking to do the best work of their careers, across a wide range of roles:
- Senior Backend Engineer(s) - Senior Full Stack Engineer(s) - Senior Product Manager(s) - Engineering Manager(s) - Implementation Manager(s)
To review all open roles and benefits, go visit our career page https://gigs.com/careers
Hi! Co-founder of iGent AI here. We build agentic systems for large-scale, industrial projects, and an agentic cloud.
Proof: our agent built a Redis-compatible database in Rust, with no human coding, in 70 man-hours – see https://www.igent.ai/insights/production-database-server
Why join:
* Small, senior team: ex-DeepMind, OpenAI, Microsoft Research, Amazon, and Cambridge University
* Hard problems across distributed systems, OS/sandboxing, ML and LLM inference/post‑training. Real users; ship to prod.
* Big Tech salary + options.
Open roles (all Senior/Staff; hands-on):
• Full-Stack - design and build the new agentic interface, with top designer • Agent Infrastructure - branching sandboxes, filesystems, orchestration, observability • Backend / Eng Lead - build cloud from first principles; distribution, sync, load-balancing, events • LLM inference & post-training - long context tech, RL, vLLM, performance • Devrel & GTM – live-developing, tutorials, OSS/community, hackathons - drive adoption You might be a fit if you have:- 5+ years building and operating production systems (or exceptional evidence).
- Own 0→1 projects; comfortable reading & generating lots of code.
- Public work (OSS/papers/blogs/products) or strong portfolio.
Apply! https://www.igent.ai/join-us
Coachcube is new gym product providing a virtual PT service. We have an experienced senior leadership team and are building a hardware/software product using digital motors, camera vision and ML to design a next-generation weight-lifting product. If you like fitness and ML, reach out for a chat!
The ideal candidate:
- Can ship quickly - Highly inquisitive but also motivated to deliver - Comfortable moving across domains - Understands fitness/weight lifting - Up for a challenge Tech Stack: Go, AWS, Unity, Python, Claude Codeemail: hello@coachcube.ai
_______
Growth Hacker - https://bit.ly/41wPdmH
* You're not just a growth marketer. You’re a full-stack creative operator. * You’ve probably done things like:
* Run playbooks that didn’t exist yet * Gotten products featured on Times Square billboards and Reddit threads * Built shareable mini-tools that turned into full-on acquisition channels * Sent physical mailers that turned into million-dollar pipeline * Landed your company on 10+ podcasts in a quarter * Have taken a product from 0–1m+ MAUs or scaled growth to $5m–$20m ARR * Built acquisition loops from scratch * Know how to make technical content go viral * Are a creative thinker with deep operational range * Can juggle many ideas, experiments, and channels at once
____________
AI Engineer (Building Agents Product) - https://bit.ly/3HWgici
* Build LLM agents for document understanding, search, and image recognition that go from prototype to production fast
* Write clean, tested Python code that scales—no research papers, just working AI features
* Collaborate with AI and product teams to iterate on solutions that customers actually use
Job descriptions and application link: https://join-kaedim.notion.site/
Tech Stack:
Product (web app, API): React, MySQL, NodeJS, Python, AWS
Machine Learning: Python, PyTorch, AWS
https://www.uncountable.com/hiring/hn
Uncountable accelerates R&D for industrial scientists across leading materials, chemicals, and life sciences organizations. With our SaaS solution, our customers get better products to the market in half the time. Uncountable was founded by MIT and Stanford engineers and has been profitable since 2016. Our team has grown from 50 to 100 over the last two years.
Full-Stack Engineers | $120k - $220k + Equity
---> Uncountable is looking for engineers who can spearhead the development of the Uncountable Web Platform. The position is heavily product-driven and comes with challenges across the stack.
--> Summer internships and working student positions are also available.
Learn more: https://www.uncountable.com/hiring/hn
Uncountable is hiring in New York City, San Francisco, London, and Munich.
Contact our CTO directly at jason@uncountable.com
Company: We're the UK's fastest growing AI voice company (~30% MoM) - very deeply focused on the trades industry right now (think your friendly neighbourhood plumbing company).
We're a small but experienced team hiring 3 more to join:
- Founding Engineer - Founding SDR - Founding Operations Lead (customer success)
Tech: GKE, python, postgres, telephony/media streaming, realtime LLMs, contextual eou detection, the occasional REST API.
https://careers.elyos.ai/ or message me - matt (at) elyos.ai
Mention bananas for extra kudos.
RevEng.AI is building foundational AI models to identify malicious threats and security vulnerabilities inside software. We're a seed stage startup having raised $4.25m from top tier VCs across the US and Europe. You’ll play a key role in advancing our platform pushing the boundaries of AI-driven program analysis.
We're looking to hire security engineers and security researchers with experience in program analysis, reverse engineering, vulnerability research, machine learning, and malware analysis.
* 5+ years of experience
* Masters or PhD in a relevant area for the security researcher role
* Hybrid working environment but ideally commutable to London, UK
* Solid understanding of software engineering design
* Ability to thrive in a fast-paced start-up environment
To apply or learn more, email contact[at]reveng.ai with "hn" in the subject line.
Hello! Co-founder of Humaans here. We’re building a best in class HR platform that automates people operations end-to-end for globally scaling companies.
What you’ll work on:
* Agentic AI for end to end automation and AI functionality all over the product
* Modern client rich UIs including workflow builders, drag-and-drop task managers, collaborative spreadsheets
* Realtime systems via WebSockets, Feathers.js, zero sync engine
* Scaling our data and AI architecture to fly for customers with 1,000s of employees
Why we like it here:
* Quality-first culture - design, performance, and DX matter
* Small, senior team with ownership from product definition to release
* Backed by great partners (YC and execs from Slack, Shopify, Figma, LinkedIn, Stripe, Intercom, Notion, etc.)
Our stack:
* TypeScript, React, Node.js, Postgres, Redis
* Monorepo with Turborepo, pnpm, GitHub Actions, Kube and CloudRun on GCP
Apply here: https://jobs.ashbyhq.com/humaans?utm_source=7nNGnERWLP
Hello. I’m the founder of Talk Machine, previously founded Citymapper.
We’re working on building a consumer voice product / platform using AI, driven by the mission to improve human communication.
Our application process is unique. Just go to https://talkmachine.com/jobs and send us a voice note and we can begin talking, just like we met in person.
We have 2 specific posts, https://talkmachine.com/jobs/engineer for full stack founding engineers and https://talkmachine.com/jobs/mobile for iOS/Android, but glad to hear from anyone that loves the product/category.
We’re seed funded and can pay competitively + quality stock options (EMI in UK).
You like: talking, consumer, voice, AI, small fast teams, building great products, chasing product market fit
You can also reach out to me at https://talkmachine.com/az. :)
Freetrade is a commission-free investing app used by over 1 million people in the UK. Our team is expanding, and we’re seeking software engineers to evolve and scale our core investing platform. In this role, you will be instrumental in building and maintaining reliable and trustworthy systems for trade execution, clearing and settlement, asset servicing, and internal operational tools. You will also play a key role in shaping our technical direction and mentoring other engineers as our team grows.
Tech we use: TypeScript, Node.js, Postgres, and GCP
Note: We are three days in the office, located just around the corner from Old Street. We don’t sponsor visas at the moment.
We are hiring across the board in engineering, data, people, marketing, risk & compliance and finance. See all of our opportunities here:
We are building the ultimate technology for mobility in cities. We are hiring
- Engineering Manager (London): https://job-boards.greenhouse.io/via/jobs/8001882002 - Director of Engineering (London): https://job-boards.greenhouse.io/via/jobs/8074378002
More roles at https://job-boards.greenhouse.io/via
Backend tech stack includes: AWS, Python, some C++, some Rust, EKS, Terraform.
What sucked the last time you rented a house or flat? Come and fix it.
OpenRent is a force for good in an industry tarnished by rip-off agencies. Enabled by an unrelenting focus on technology, we now let more properties than any agency in the UK. In the last 12m we let over £50 billion worth of property, to over 7 million registered users, without ever charging any admin fees.
You'll be working on solving every aspect of the rental journey, from models to predict the right price of a property, to building the future of property management, all to help tenants find their dream home, and landlords their ideal tenant.
We're VC backed, profitable, and have plenty of ambition to maintain our fast growth in this absolutely massive market.
Roles currently available:
- Senior UX/UI Developer | Equity | 100k+ (based on experience) + quarterly bonus
All roles visible here: https://www.openrent.co.uk/jobs
We recently launched Lumo, a privacy-friendly ChatGPT alternative, by the makers of Proton Mail & Proton VPN.
We are looking for curious and talented people to help us grow Lumo with any of these skills: ML engineering, LLM inference, GPU infra & devops, Frontend (Typescript, React), Backend (Rust, PHP). Looking for senior-level or fast-growing juniors.
I'm one of Lumo's core devs, write to me directly at marc dot dupont, domain proton ch, with "HN" in the subject.
We are Blacklane, a global, premium chauffeur service company, operating in 50+ countries.
As part of our engineering teams, you will help develop the services that power the Blacklane, work on improving our back-office system, or solve problems around our products which allow business partners to integrate with the Blacklane platform.
We are looking for:
# Senior Software Engineer – Backend → Apply: https://grnh.se/3z4sljwi2us
# Software Engineer – Backend → Apply: https://grnh.se/lrj4si102us
Our stack includes Ruby, Go, TypeScript, and Java services (DDD) deployed on Kubernetes, communicating via SQS and Kafka. We use Postgres, MySQL, Elasticsearch, Redis, and DynamoDB, with AWS and Terraform for infrastructure.