Splash Tech| Backend Mid-Senior/Senior | Remote( +-2 EU CET) | Full Time | https://splash.tech/

We’re a small UK-based free-to-play gaming company with a distributed EU team, growing fast after recent success and scaling our backend platform. We’re looking for two roles, from mid-senior to senior engineer with at least 5+ years of experience.

Backend: Strong in backend development, ideally Java, but open to those willing to learn. DevOps experience is a plus, or a strong desire to build it.You’ll be expected to do devops as part of this role.

Fullstack: FE and APIs, you’ll also be asked to write SQL and some Java Controllers that access data. It’s ok if you don’t know Java, but our controllers are written in Java and you’ll need willingness to learn.

Our stack includes Java, Python, TypeScript, Angular, SQL, AWS, Kubernetes, Postgres, Trino, Flux, Flagger, and Terraform.

Our engineers must be able to think product-first, and take a task from idea to production, work across the full cycle. You must write your own code, AI assistance is fine, but you must be able to produce all your work independently.

We are looking for candidates that can write SQL, our approach when it comes to the DB is SQL first. We also value clear thinking and communication, you should be comfortable sketching simple architecture or flow diagrams (boxes and lines, nothing formal) to explain your ideas.

To apply, please send an email to jack[at]splash.tech with the subject “Backend Hackernews 2025” or “Fullstack Hackernews 2025”.

Please send any git/bitbucket/source-forge project that represents your coding otherwise I’ll ask you to complete a small test project.

JetKVM | Senior Fullstack Engineer | Remote (CET ±3) | Full-Time | Go / TypeScript / WebRTC | Open Source

JetKVM builds open-source KVM-over-IP hardware that lets you control any computer — BIOS and all — through your browser. After raising $6M on Kickstarter (the #3 most-backed tech project ever), we’re scaling production and software for tens of thousands of users.

We’re looking for a Senior Fullstack Engineer to work across our stack — Go, Node.js, React, and WebRTC — from backend APIs to low-level firmware integrations. You’ll shape architecture, improve video streaming and authentication, and ship features end-to-end in a small, fast-moving team. Open-source, async, and remote(CET+/-3).

Apply → https://jetkvm.com/careers

Frequenz Energy-as-a-Service GmbH | Full-Time | Berlin/Hybrid-Possible, Germany We are a technology company developing groundbreaking solutions that help companies to rapidly transition from being passive electricity consumers to becoming fully self-sustaining prosumers, capable of leveraging various renewable energy assets.

We are currently looking for Rust and Python software developers to join us in Berlin.

Our homepage: https://www.frequenz.com

Apply here for Rust: https://www.frequenz.com/jobs/senior-rust-engineer and here for Python: https://www.frequenz.com/careers/senior-python-developer

Feel free to attach links to your code examples from github, gitlab, or the like to your application.

These roles are not fully-remote. These are based in Berlin, with a possibility for hybrid-model, which can be discussed during the course of the interview.

(PS: If you choose to apply, we would appreciate if you could mention that you have come from HN :) )

Shepherd | ONSITE | San Francisco, CA

Shepherd is an all-in-one commercial insurance platform. We provide savings on insurance premiums for commercial businesses that are leveraging modern technology on their worksites. While we began with commercial construction, we're expanding into adjacent sectors, like energy.

We’ve raised over $20M and we’re looking for product-minded engineers to join us as we continue to scale! We’re looking for someone who thrives on ownership, drives results, and cares deeply about both technical excellence and customer impact.

We’re hiring for:

* Senior Software Engineer, Full Stack

* Senior Software Engineer, Backend

* Senior Software Engineer, AI Products & Agents

* Senior Software Engineer, AI Infrastructure

* Senior Software Engineer, Cloud Infrastructure

* Data / MLOps Engineer

Our stack includes:

* Typescript, React, Next.js, GraphQL w/ Apollo, Node.js, Postgres & Redis

Apply here: https://shepherdinsurance.com/careers In the form, be sure to mention that you heard about this opportunity via Hacker News.

If you want to read more about our team and culture, check out our blog: https://shepherdinsurance.com/blog

Tosoo | https://tosoo.ch | Zurich (Switzerland)

We are looking for a motivated Junior Generalist Software Engineer to join the Tosoo team. In this role, you will contribute across the entire technology stack; designing, developing, validating, and operating software components that power our products and infrastructure. Our stack includes a C++ embedded system, a Python-based data analysis framework, several Python and Go cloud services, and PostgreSQL databases. Strong competence in at least one of these areas is required, along with a curious, hands-on attitude and an eagerness to learn and work across the rest of the stack. At Tosoo, you’ll be part of a small, fast-paced team that values initiative, technical curiosity, and collaboration. We aim to make a meaningful difference in the world by maximizing the impact of each team member. We would love to hear from you! Please send us your CV along with a short cover letter describing (or just linking to) two projects: one that represents your most ambitious technical achievement (something challenging or complex, even if the code isn’t perfect), and another that showcases your most refined or professional work (something where code quality and craftsmanship were your focus).

hiring@tosoo.ch

LiveMap | Geospatial Data/Backend and Mobile Engineers | Full-Time | Switzerland or Remote (CH, EU, UK)

Visa sponsorship is not provided.

LiveMap is a funded startup with a vision to build the next generation of mapping apps (think hyper-personalised Google Maps). How that looks is still being explored so we're building prototypes, getting them into customer hands and iterating quickly. We're looking to bring on a couple of people to help accelerate this development process.

As a data engineer you'll set up a data pipeline, work with product to identify relevant datasets, connect, persist and expose that data.

As a mobile engineer you'll be the UI delivering value to the customer. We are testing hypothesis in weeks and leveraging tools like Claude Code to do it.

Please find more information and application forms at the links:

• Geospatial data/backend engineer - https://tally.so/r/n095jj

• Mobile engineer - https://tally.so/r/w56N1Q

Happy hacking

Stealth | Software/AI Engineer | Remote Anywhere | Full Time

Hello, I am bootstrapping an AI companion startup. I believe that within 10 years, more people will date AI than humans. I think this is neither good nor bad, just interesting, and I want to build something in this space.

I am looking to hire someone with strong technical and problem solving skills. You will be seeing a lot of problems for the first time and need to just figure out how to hack a solution. Sometimes that involves writing code but not always. It is ok if you don't have prior AI experience.

Interesting problems we will work on: - extreme latency issues while providing a fully multimodal experience (audio, video, text) - building models that predict when to interrupt in a conversation - building models and control systems for emotion - generating avatar response in real time - custom 3d models from input image - real time or very fast video generation with custom characters - llm memory

As I am bootstrapping this, I regrettably can only offer $4,000/mo ($50,000/yr) at the moment. If you are nevertheless interested, please email James at gcyiuqy1@gmail.com

Hardian Health | Senior Product Engineer | REMOTE (UK only) | Full time flexible, 1 (initial) year contract

We're building a regulatory intelligence platform for AI in healthcare. In effect a specialist dataset + search engine for that information. Currently working to get from a Beta to production ready. This is a Full-stack role, working alongside CTO.

Stack: Python, Node, React, GraphQL, PostgreSQL, Data scrapers

Fully remote with quarterly meetups. Flexible hours.

Must have UK work authorization (no visa sponsorship).

Find out more and apply: https://www.hardianhealth.com/careers-list/product-engineer

Stream | Multiple Positions | Amsterdam (NL), Skopje (North Macedonia) | Boulder, CO (US) | Toronto (Canada)) | Remote possible | Full Time | Visa Sponsorship

We are consistently hiring backend engineers ranging from Senior level to Staff / Lead / Director / Principal Go engineers. If you have experience with a different tech stack, we offer a 10-week onboarding program to train you in Go, scaling and other key topics: https://tinyurl.com/2u5x9f9w

We’re also hiring for:

* Staff Python Engineer – (Open Source Video/Voice AI Library)

* Staff Product Designer (Mobile SDK)

* Staff Product Designer (UI)

At Stream, we use Go for our video SFU, chat API, Moderation and Feeds, serving high traffic from major apps like Strava, Nextdoor, Patreon, and Midjourney. Our tech stack: Go, CockroachDB, RocksDB, WebRTC, Raft, and Redis.

Why Join Stream?

* High scale/ difficult engineering, we have customers using our products with millions of users

* Default alive. Startup growth opportunity with healthy revenue

* All managers are hands-on and capable engineers

* Edge network of servers around the world

* Great opportunity to learn and grow

Remote: our roles are primarily NL, US, North Macedonia, or CA-based (hybrid), but exemptions for remote work within the EU may apply to specific cases.

Visa Sponsorship: Available for the Netherlands

Apply here: https://jobs.ashbyhq.com/stream?utm_source=5rrpvObp3r

University of Toronto | Postdoc: Synthetic + Molecular Biology on Microplastics | ONSITE Toronto, ON

We’re engineering enzymes to degrade microplastics using AI + high-throughput molecular biology. Join the Laboratory for RNA-Based Lifeforms (https://RNAlab.ca | PI: Artem Babaian) on one of the largest projects in bioinformatics today. Building on Serratus (10× RNA virus discovery, Nature 2022), we’re now developing Logan to mine planetary-scale genomics datasets to evolve and test novel plastic-degrading enzymes.

Looking for: * PhD in Molecular/Synthetic Biology, Biochemistry, or Genetics

* Strong skills in yeast/bacterial systems, enzyme assays, or metabolic engineering

* Interest in automation, robotics, and collaboration with AI and Computational Biology scientists

Full-time postdoc in Toronto, Canada. Start date: flexible/immediate.

Apply Today: https://jobrxiv.org/job/university-of-toronto-27778-syntheti...

----- Relevant Links:

* Serratus paper (https://www.nature.com/articles/s41586-021-04332-2)

* Logan preprint (https://www.biorxiv.org/content/10.1101/2024.07.30.605881v2)

* Entering The Platinum Age of Computational Discovery. Vision. (10m; https://www.youtube.com/watch?v=mPUM-adhXd8&t=5875s)

Let’s build the biology together to clean Our Planet.

Tracebit | https://tracebit.com | London/New York| Full-Time

Tracebit is an Accel backed, UK founded security product company taking a new look at canaries for intrusion detection.

We work with some amazing companies (Docker, Riot Games, Synthesia, Zepz...) to help detect threats in cloud and enterprise.

We're hiring:

* Founding Engineer | London | £60-120k + generous equity

* Founding Security Researcher | Remote | £100-140k + generous equity

* Founding Account Executive | New York | $180-200k OTE + generous equity

Learn more and apply: https://tracebit.com/careers#section_open-positions

JWP Connatix | AI Software Engineer | REMOTE (EU) | Full-Time

JWP Connatix is the most comprehensive independent video technology and monetization platform, helping broadcasters, publishers, and advertisers deliver premium streaming and online video experiences while maximizing video revenue across all screens. The company offers an end-to-end platform that streamlines live and on-demand video with hybrid monetization models, unique data and insights, unmatched customer service, and the largest independent premium video marketplace, providing the entire media ecosystem with enhanced scale, transparency, and revenue.

We are looking for a skilled and adaptable AI Engineer to join our AI Proof of Concepts team at JWP Connatix. You'll be responsible for implementing AI-First development methodologies, integrating sophisticated AI tools into our software pipeline, and rapidly building MVP prototypes that demonstrate innovative solutions. This role offers the opportunity to work at the cutting edge of AI-integrated development while delivering high-impact prototypes in a fast-paced, iterative environment. The ideal candidate thrives in rapid prototyping environments, has hands-on experience with AI tool integration, and enjoys the challenge of quickly turning concepts into working demonstrations for stakeholder validation. Candidates should also know, and work with AI code generation tools (Claude Code, Cursor, Copilot, etc).

If this sounds like something you'd be interested in please apply!

https://jwpconnatix.com/careers/job-posting/?gh_jid=7257043

Temporal Technologies | Multiple positions in United States - WORK FROM HOME | FULL-TIME |

Temporal offers an entirely new way to build scalable and reliable applications. Temporal enables developers to focus on writing important business logic, and not on managing state or worrying about the underlying infrastructure. Backed by top VC firms, we have built a team of professionals from various successful start-ups and well-known technology companies.

Temporal Raises Secondary Funding: https://temporal.io/blog/temporal-raises-secondary-funding

Temporal in 7 minutes: https://temporal.io/tldr

We're looking for senior level engineers for multiple roles - see here - https://www.temporal.io/careers

FEATURED ROLES:

Staff Software Engineer, Traffic → https://grnh.se/1cbb896d7us

Staff Software Engineer, Cloud Infrastructure → https://grnh.se/8b0ba8347us

Staff Software Engineer - Cloud Capacity → https://grnh.se/a0hc6o6h7us

Senior Product Manager, SDK & Developer Primitives → https://grnh.se/2e82af137us

Staff Cloud Security Engineer → https://grnh.se/nn0axiu57us

US benefits include: Unlimited PTO, 12 Holidays + 2 Floating Holidays, 100% Premiums Coverage for Medical, Dental, and Vision, AD&D, LT & ST Disability and Life Insurance , Empower 401K Plan, Additional Perks for Learning & Development, Lifestyle Spending, In-Home Office Setup, Professional Memberships, WFH Meals, Internet Stipend and more! Benefits outside the United States vary by country.

Apply here https://www.temporal.io/careers/

Hiring Tech Lead - Staff Backend Engineer - AI Engineer – 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:

Staff Backend Engineer

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

Senior Engineers (Backend, AI): Remote across LATAM. Build fast, useful tools. Small, experienced team. Real autonomy and product impact.

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

Apply here: tramcase.com

BAND | Full-stack software engineer | Remote (US) | https://www.joinband.com

Band powers trade agreements and incentives for the businesses that supply everything around us, improving how distributors and manufacturers transact trillions annually.

Led by the team that founded and built Blue Apron to a $2B IPO and built Bread Payments, Band has already tripled revenue this year and is looking to add our third full-stack engineer, reporting to the CEO.

Hard problems you’ll solve:

- Building AI to understand and optimize complex trade agreements with nuanced tiered incentives

- Interpreting massive amounts of transactional data across businesses to build a single source of truth

- Providing actionable automated insights to stem profit loss and grow our customers’ businesses.

Apply at: https://www.joinband.com/careers

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

Pango | Full-stack Software Engineer | On-site (hybrid) in Stockholm, Sweden | Full time

Pango is building the world's first Agentic Operating System for e-commerce logistics. Our vision is to create the AI e-commerce employee of the future. We are forming our core team in Stockholm and are looking for exceptional engineers. We are based at the SSE Business Lab, where companies such as Klarna, Voi, Budbee or Legora originated. We have achieved a product-market fit and are growing rapidly.

You are a good fit if:

* You are comfortable maintaining, expanding and operating an entire B2B SaaS platform with a high sense of ownership.

* You are happy to take on work that in a large company is divided into a dozen roles, and execute it all at a good enough level.

* You are unafraid of any technology. If we need a desktop app and you haven't done one before, you will study the documentation of Electron.js and build one. If a model for predicting delivery times is needed, you will do a literature review to find the right architecture and train one.

* E-commerce (Shopify, Magento, other platforms, shipping carrier integrations) experience is a plus.

You will take a key role in shaping the product and company, with ability to make an impact and advance career limited only by your aptitude and interest.

Reach out to lukasz@trypango.ai if you are interested or have any questions. We review applications immediately and move quickly.

Or check out the formal advertisement at https://www.linkedin.com/jobs/view/4332175835/

Oxidian | https://www.oxidian.com | Remote (Ireland/EU ONLY)

We're doing to government software what challenger banks did to banking. We build critical systems that help scientists and researchers, ensuring public money is well invested.

Our work involves building high-performance Python libraries to wrangle massive earth observation and satellite data sets (think petabyte scale), creating clean web UIs for complex data, and building modern DevOps pipelines to automate scientific workflows.

We're a small, fast-moving team. We give you trust and autonomy to own your work from day one. No bureaucracy, just hard problems and impact.

We're hiring:

* Senior Python Developer (solve complex data and performance challenges)

* Senior DevOps + Python Engineer (build the infrastructure that runs it all)

More info and how to apply: https://www.oxidian.com/#join-us

At Jeenie, we’re building technology that breaks down language barriers. Our platform connects people with live, professional linguists — providing on-demand interpretation in 300+ languages.

We’re a small, fast-moving team, and this role is a critical hire to help us scale our platform and shape the next generation of our architecture. You’ll work closely with our Architects and Innovation teams to solve real-world problems that directly impact people’s access to healthcare, legal services, and more.

Location: Remote (U.S.) Eligibility: U.S. Citizen or Green Card Holder

If you like working on meaningful problems, enjoy autonomy, and want your code to have a real-world impact — we’d love to talk. Apply Here: https://shorturl.at/VOvje For more roles, visit: https://jeenie.com/company/careers

FusionAuth | Senior Java Engineer, Senior Security Engineer, Documentation Engineer, Sr Developer Advocate | Varies between REMOTE and ONSITE in Denver, CO, USA, details in job desc | Salaries listed on job req, but for the Java Engineer it is 140k-180k

Our mission is to make authentication and authorization simple and secure for every developer building web and mobile applications. We want devs to stop worrying about auth and focus on building something awesome. There are a lot of companies in the auth space, but we feel like we have something special:

* a unique deployment model (self-host on-prem or in your cloud or run in our cloud)

* A well designed API first approach; one customer compared our app to petrichor

* a mature product (the code base is eight+ years old and we've found and fixed a lot of the sharp edges around core login use cases; there are plenty more features to add)

* founder-led; the CTO is an engineer who still writes code

* a full featured free-as-in-beer version which makes the sales cycle easier; prospects often come in having prototyped an integration already

Our core software is commercial with a "free as in beer" version. We also open source much of our supporting infrastructure. Technologies and standards that you will work with: Modern Java, MySQL, PostgreSQL, Docker, Kubernetes, OAuth, SAML, OIDC.

Learn more, including about benefits and salaries, and apply here: https://fusionauth.io/careers/ ( Click/tap the 'View open positions' orange button. )