(193) Startup jobs for Location: Remote - Joinup

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🚀 Build the future of secondhand shopping with Circlin ♻️

Founding Backend Engineer

We are building the one-stop shop for secondhand Swiss fashion - a video-first, mobile-first marketplace that makes resale easier, safer, and more engaging. We’re looking for a Founding Backend Engineer to own the backend foundations behind orders, payouts, search, messaging, notifications, integrations, and marketplace workflows. This is a high-ownership, equity-first role for someone who wants to shape the architecture, engineering culture, and trust layer of an early but already released product. Initial compensation is 2–3% equity before fundraising, with the expectation to transition to salary + equity after a raise.

Master's Student (Frontend + Backend) wanted – EdTech Startup hey ema 🇨🇭

Full-Stack Developer (Working Student) – EdTech Startup hey ema

educamatt altermatt

We're Lisa & Samira, founders of hey ema – a Swiss EdTech app for primary schools (grades kindergarten–6), aligned with Lehrplan 21 (the Swiss national primary school curriculum). We're piloting with five schools and currently founding our AG (Swiss corporation). Goal: national rollout by January 2027. hey ema is built by teachers, for teachers – iteratively, close to classroom reality, feature by feature. You are the technical bridge that turns our mission into a real product – together with David (Senior AI Engineer, ETH) and Konstantin (Digital Education Expert, PHSG). 🛠️ What you'll build – First production version of our web app – built to last, not patched together – Multi-tenant architecture with clean data separation across schools, classes and user roles – Role-based access control (RBAC) – compliant with Swiss nDSG and GDPR from day one – Swiss hosting (e.g. Exoscale, Nine, Switch) – data stays in Switzerland – CI/CD pipeline, structured Git workflow, automated testing – API design with interfaces for LLM-based AI features 💻 Stack Deliberately open – we'd love a well-reasoned proposal from you. Experience with React / Next.js, Node.js or Python, PostgreSQL and Docker / Kubernetes is a plus. PWA or caching experience welcome. 📐 What we offer – Currently enrolled in a Master's programme in Computer Science, Software Engineering or a related field – ~1.5–2 days/week, compatible with your Master's schedule and flexible – Hybrid collaboration, Zurich area preferred – Real say in architecture and technology decisions – Equity conversation possible · Senior consulting support in the background Contact: Lisa Altermtt CEO educamatt [email protected]

Applications Software Development

Enhanced AI capabilities for robots

Robotics project lead

When you join the Hoursec team, you join a brilliant group of experts who are making the world of Artificial Intelligence sustainable, with the right technology and shaping the future of humanity with an open, interdisciplinary mindset. We are building a fascinating team, ranging from Astrophysicist to AI experts and just about everything in between! We value interdisciplinary minds and outside-the-box thinking more than anything, we are innovative and creative and this makes us very collaborative and multicultural with a highly scientific and entrepreneurial environment. Together, we will take your skills and passions to make a paradigm shift in Artificial Intelligence, and with this, we are building sustainable businesses for our customers and humanity in general. Hoursec was founded on the idea that using the energy efficiencies of the brain, is necessary to keep the exponential growth that our technological society requires. We are making this call for people who are looking for something more than a job or a career, our call is for precise, outstanding engineering that sets people and the planet first. The Position As a robotics project lead, you will be a key member of our company expansion into new markets. You are expected to perform tasks related to early stage scaling developments, product tasks, which is key for the company to be able to test and validate technologies, products and services. The position will also be related to pilot projects with customers where the project lead will address strategic partnerships. Skills: Electrical Engineering, computer science, robotics, FPGA assembly.

FPGA prototyping

Computer Science

Founding AI / Full-Stack Engineer (AI Systems, Early-Stage Build)

Full-Stack Engineer (AI Systems, Early-Stage Build)

We’re building a next-generation platform focused on improving how AI systems are evaluated and deployed in real-world environments. This is an early-stage product with a working direction, where we’re now focused on execution turning structured workflows, user flows, and system logic into a stable, usable platform. We’re looking for a strong technical builder who can take ownership of system design and implementation, not just individual features. What you’ll work on: * Designing and building a full-stack system (frontend + backend) * Structuring backend logic and data flows (Supabase / Postgres) * Implementing user flows and dashboards * Integrating APIs and handling real-time data * Ensuring the system is stable beyond demo environments We’re looking for someone who: * Has built and shipped real products end-to-end * Can work with ambiguity and define structure * Thinks in systems, not just components * Prioritizes reliability and clean architecture * Can move fast without overengineering Tech (current stack): * React / frontend frameworks * Supabase (auth, DB, backend logic) * API integrations * Optional: experience with AI systems / LLM workflows

API Development

Sales Person

CSO / Sales Freelancer / Sales Whisperer

I am looking for multiple sales oriented people who are willing to either work commission based as freelancers or equity based full-time to accelerate current sales processes of multiple products and services in the portfolio. contact via mail or DM [email protected] +41783212221

Customer-focused Sales

Fundraising & Partnership Manager (ehrenamtlich)

Fundraising & Partnership Manager (ehrenamtlich)

SEET – Support Education, Empower Together ist ein gemeinnütziger Verein, der Geflüchtete unterstützt, die ihre Ausbildung aufgrund ihrer Flucht unterbrechen mussten. Unser Studienförderprogramm bietet persönliches Mentoring, situationsbezogene finanzielle Unterstützung sowie Workshops und Netzwerkaufbau, um Geflüchteten Zugang zu Schweizer Hochschulbildung zu erleichtern. Unser Ziel ist es, nachhaltige Wirkung zu erzielen, indem wir Geflüchtete auf ihrem Weg zur Selbstbestimmung in der Schweiz stärken. Besonders berücksichtigen wir die komplexen Herausforderungen, denen insbesondere Frauen begegnen, die häufig intersektional benachteiligt sind – als Frauen, Migrantinnen und Geflüchtete. Gleichzeitig unterstützen wir Menschen aller Geschlechter.

Campaign Execution

Corporate Partnerships

Co-Founder (Technical) - AI Automation for Swiss SMEs

Technical Co-Founder / CTO

Swissflow.ai automates repetitive administrative work for Swiss SMEs - invoicing, scheduling, customer communication, document handling - using AI agent workflows. Pre-seed, founder-led, active client acquisition underway. What is needed: A technical co-founder with production engineering depth - Python, LLM/agent frameworks, backend infrastructure, security, cloud deployment. Someone who can own the architecture, make deployments bulletproof, and build systems that work reliably in real business environments. About me: Proven business exec who has built startups, has been trading in financial markets globally and been at the forefront of technology all my professional career. I actively use agentic coding tools, have built a full algorithmic trading bot, and have hands-on experience with AI workflow design, software integration, and automation architecture. I can conceptualise, prototype, and ship working systems. How we'd work together • You: architecture, infrastructure, security, production reliability, scaling • Me: client acquisition, sales, commercial strategy, product direction, prototyping and AI workflow design This isn't a technical vs. non-technical split - it's a depth split and flexible. I work at the intersection of business and technology. You go deep on engineering. Together we cover the full stack, end to end. As we scale, we build the team around us - but this is how we start. Compensation This is a founding role, not a job. In return, you earn an increasing equity stake until revenue supports a salary. If you want to build something and own a meaningful piece of it, let's talk.

Artificial Intelligence

Back-end Operations

Cloud Applications

Application Security Architecture

System Architecture

Commission-Based Sales Partner for Digital & AI Projects at Tanner Lab

Freelance Business Development / Sales Partner (Commission-Based)

Tanner Lab GmbH

Tanner Lab is looking for a freelance sales partner to help bring in new client projects in software development, AI, automation, and digital consulting. This is a remote, commission-based role for someone who is strong in outreach, lead generation, and starting conversations that turn into business. You will work directly with the founder and build on an existing setup that already includes a strong website, CRM, proven sales texts, lead lists, ongoing marketing, and established partnerships. We also support good ideas for outreach, sales campaigns, and marketing initiatives, including covering reasonable costs where it makes sense. Compensation is typically 5-10% per closed deal, depending on the project. This is ideal for someone who wants a flexible role with clear upside and direct impact.

Small Business Development

Acquisition Sales

Advertising Sales

Acquisition Marketing

Late Co-Founder - Growth & Fundraising for Language Learning Application

Late Co-Founder - Business Development, Growth & Fundraising (Equity)

Repetium is looking for a driven, entrepreneurial person to support growth, business development, and fundraising for an early-stage AI language learning startup. You will work closely with the technical founder on outreach, partnerships, go-to-market initiatives, funding opportunities, grant research, and fundraising materials such as pitch decks and presentations, including support for our planned HORIZON-EIC-2026-ACCELERATOR-01 application. We are looking for someone with initiative, strong communication skills, and interest in startups, growth, fundraising, and AI products. This role is part-time and equity-based initially, with the goal of adding salary once funding has been secured. Repetium is part of AWS Activate and has received AWS Activate Founders credits.

Acquisition Sales

Advertising Sales

Small Business Development

Startup Development

Startup Marketing

Late Co-Founder & CMO – PropTech/Sustainability Startup "Energy Mirror"

Chief Marketing Officer

About Energy Mirror Based in Lausanne, Energy Mirror is an early-stage PropTech and Sustainability startup. We are building the tools needed to accelerate the energy transition in the real estate sector. We have successfully developed our Minimum Viable Product (MVP) and are now shifting our focus to our next major milestone: market validation and fundraising. The Challenge We have the technology, but now we need the traction. We are looking for a proactive, entrepreneurial Chief Marketing Officer (Late Co-Founder / Freelancer) to join our core team. Your immediate mission will be to generate market interest and secure Letters of Intent (LOIs) from key strategic partners to strengthen our upcoming seed fundraising round. What You Will Do B2B Partnership Marketing: Develop and execute outreach strategies targeting communes, energy suppliers, building renovation services, and equipment providers. Lead Generation & LOIs: Craft compelling value propositions, pitch materials, and campaigns designed specifically to secure LOIs from B2B partners. B2C Awareness: Build our initial digital footprint to test user acquisition channels and market the product directly to individual property owners. Fundraising Support: Work closely with the existing founders to shape the company narrative and marketing data for investor pitches. Who You Are Having motivation to make a big change is our only requirement, however if you have below skills that is a plus. A "Doer": You are highly proactive, hands-on, and comfortable working in the scrappy, fast-paced environment of an early-stage startup. B2B & B2C Savvy: You know how to communicate a complex tech/sustainability product to both enterprise partners and everyday consumers. Networked & Strategic: Familiarity with the Swiss energy, real estate, or startup ecosystem is a massive plus. Entrepreneurial: You aren't just looking for a freelance gig; you are looking for a project you can take ownership of as a late Co-Founder. What We Offer The opportunity to get in on the ground floor of a high-potential sustainability startup. A fully developed MVP ready for market testing—you won't be selling vaporware. A flexible arrangement: We are open to a freelance contract that transitions into an equity-based Co-Founder role, or a direct Co-Founder equity agreement. Join us in reflecting the future of energy! If you are ready to roll up your sleeves and build something impactful, reach out with a brief message about how you would tackle our first 30 days.

Acquisition Marketing

User Experience Testing

Creative Pitching