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Offres Startup

Technical Cofounder

Workbit

San Diego (Co-)Fondateur Technique Autres Temps plein Diplôme/Certificat postsecondaire Aucun Flexible (bureau et distant)

About this position:

Technical Co‑Founder (AI/ML, Multimodal Systems)OverviewWe're building Workbit, a workplace analytics company focused on using AI to empower—not replace—the workforce. Our mission is to build intelligent tools that help employees optimize their performance, unlock their potential, and thrive in their roles. By leveraging data from real-world workflows, I aim to bridge the gap between management and frontline teams through actionable insights and ethical AI.I believe the future of work is not about automation for efficiency alone, but about augmenting human capability. My passion lies in developing technology that uplifts people, enhances collaboration, and ultimately contributes to a more productive and humane future of work.What You’ll DoArchitect and build core multimodal AI infrastructure (e.g., large language models + vision/audio pipelines).Rapidly prototype and launch MVP features (e.g. real-time inference, transformer-based fusion).Own technical roadmap, tooling, and hiring strategy as a co-founder.Help define product strategy and participate in fundraising.Ideal ProfileStrong background in deep learning: expertise in transformers, cross-modal architectures.Experience with multimodal systems—either academic, open-source contributions, or deployed products.Early-stage startup mindset: ready to commit time and energy for equity.Collaborative communicator: excited to shape both product and company culture.Why Join UsBe first technical leader and co-founder with meaningful equity.Join an ambitious journey to redefine multimodal AI UX.Influence product vision, culture, and future hiring.(Optional: mention perks like remote flexibility, mentorship, or accelerator readiness.)Next StepsInterested? Shoot me a brief note sharing your interest, background in ML/multimodal work, and what excites you about this mission. Let’s connect and build something groundbreaking.

CTO Cofounder needed for SaaS marketing AI startup

Megafone LLC

Nashville (Co-)Fondateur Technique Produit et design Temps plein Aucun 20% - 30% À distance seulement

About this position:

CTO/Co-FounderFull-Stack Software Engineer (SaaS & API Integration Specialist)⸻Core Skills 1. API Integration Expertise • Experience with Instagram Graph API and LinkedIn API (posting, media handling, authentication). • Knowledge of rate limits, token refresh, and error handling for social media APIs. 2. Backend Development • Strong in Node.js or Python (FastAPI/Django) for building the automation logic. • Database management (PostgreSQL or MongoDB) for user accounts, scheduling, and content storage. • Secure authentication (OAuth 2.0, JWT). 3. Frontend Development • Proficiency in React or Next.js for a clean, easy-to-use dashboard. • Experience with responsive design and mobile-first UI. 4. AI / Content Processing • Ability to integrate OpenAI API or similar for caption optimization and formatting. • Understanding of NLP for rewording Instagram captions into LinkedIn-appropriate content. 5. Cloud Infrastructure • Deployments on AWS, GCP, or Azure. • Serverless functions for scheduled posting (e.g., AWS Lambda, Google Cloud Functions). • Scalable architecture to handle hundreds of clients. 6. Automation & Scheduling • Experience with job queues (e.g., Celery, BullMQ) for scheduled posting. • Cron job setups for consistent publishing. 7. Security & Compliance • GDPR/privacy best practices. • Secure handling of client credentials for social accounts.⸻Nice-to-Haves • SaaS subscription/payment integration (Stripe). • Experience with multi-tenant architectures. • Prior work on social media management tools (Buffer, Hootsuite, Later). • Familiarity with webhooks for real-time content updates.⸻Recommended Background • 3–6 years in full-stack web app development. • Portfolio with SaaS products, especially in marketing automation or social media. • Comfort with early-stage startup environments (can work independently, wear multiple hats).

Cofundador para startup de aprendizaje de idiomas

MyInput Learning Not officially incorporated

Bogotá (Co-)Fondateur Technique Produit et design Temps partiel Aucun 10% - 20% À distance seulement

About this position:

Te encargarás de la parte tecnológica de la startup y de desarrollo de producto. Tu rol será diseñar y programar una plataforma online inmersiva para aprender idiomas con múltiples funciones las cuales serán comunicadas al contactarnos. ideal tener habilidades en desarrollo de software, UX, backend, Frontend. Ideal que tengas buen manejo del tiempo, buena gestión de proyectos, comunicación efectiva, orientación a los resultados, compromiso con la visión, mente creativa y abierta a aspectos de desarrollo personal en política de trabajo. En caso de contar con un equipo u otra persona con las mismas habilidades, estamos abiertos a considerar la opción de que varios se unan para la división de tareas.

Tech CoFounder Wanted for Revolutionary Sports App

Fanverse Limited Company

Kwekwe (Co-)Fondateur Technique Temps partiel Aucun 10% - 20% À distance seulement

About this position:

Tech Co-Founder Wanted for Revolutionary Sports App Join our team as a tech co-founder and help shape the future of sports technology! We're looking for a skilled software engineer with a passion for innovation and a drive to succeed.About the App:Our sports app is designed to revolutionize the fan experience, providing real-time updates, exclusive content, and community features. What We're Offering:20% equity in our promising startupOpportunity to shape the technical direction of the app and work on cutting-edge projectsWhat We Expect:$500 upfront payment to secure your equity stake (this amount is negotiable based on your experience and contributions)Technical expertise in mobile app development, APIs, and data storage solutionsStrong understanding of cloud platforms and DevOps practicesCollaborative mindset and ability to work effectively with our teamWhy Join Us?Be part of a dynamic team and contribute to the growth of a innovative sports appOpportunity to learn and grow with a promising startupFlexible working hours and remote work optionsIf You're the Right Fit:If you're a talented software engineer with a passion for sports and tech, we'd love to hear from you! Send us a message with your experience, skills, and why you'd be a great fit for our team. Let's build something amazing together!

Technical Cofounder wanted for AIpowered Social Media SaaS

Reelytica SRL

Turin (Co-)Fondateur Technique Temps partiel Baccalauréat Aucun 20% - 30% À distance seulement

About this position:

About the project Reelytica is an early-stage startup building an AI-powered platform that helps creators and small businesses simplify content planning, generate social media ideas, and analyze performance — all from a single, smart dashboard.We’re currently in the concept phase with a clear vision, marketing strategy, and defined roadmap. The next step is building the MVP. We're looking for a passionate developer to join as a technical co-founder and shape the product from day zero.Your role As a Technical Co-founder, you'll take the lead in building and iterating on the MVP. You’ll be responsible for:Designing and developing the web platform (ideally using React + Node.js or similar)Helping define the tech stack and architectureCollaborating on product strategy and feature developmentWorking closely with the founding team on timelines and prioritiesContributing to early decisions that will shape the startup’s futureWe’re looking for someone who...Has experience in full-stack development (preferably JavaScript, React, Node.js)Is comfortable working independently in a startup environmentLives in Italy (preferably in or near Turin, or available to meet in person occasionally)Is motivated to co-build something from scratch, with long-term commitmentIs interested in social media, automation, and AI technologiesWhat we offerFounding team role with equity (negotiable based on involvement)Full autonomy on the technical sideOpportunity to co-create a tool with real market potentialStrong marketing/growth background on the business sideA collaborative, no-BS mindsetIdeal for 💡 Makers, indie hackers, early-career devs with entrepreneurial spirit, or experienced developers tired of freelance work and ready to build something of their own.

Tooling Studio Growth CoFounder Wanted

Tooling Studio

Amsterdam (Co-)Fondateur Marketing et ventes Temps plein Maîtrise Aucun 5% - 10% Flexible (bureau et distant)

About this position:

We're building the full control center for agencies, founders, and SMBs—inside Google Workspace.Tooling Studio builds tightly integrated, browser-based tools that reduce app creep and streamline day-to-day operations for small and mid-sized teams. Project management. CRM. Time tracking. Goals. Fully connected and synced across Google Workspace.We've already launched our first tools; Kanban boards and CRM, both deeply integrated with Gmail, Calendar, and Drive. We’ve crossed 1,000 active users, have early revenue, and are shipping fast. The infrastructure is in place. Now, we’re looking for a growth-focused co-founder to help scale the commercial side of the business.Who We're Looking ForWe're not hiring an employee—we’re looking for a true co-founder with strong marketing and growth expertise. Someone who has:A proven track record of growing user bases for niche B2B SaaS productsDeep experience with growth marketing—from positioning and SEO to paid campaigns and funnel optimizationAn entrepreneurial mindset: ideally you’ve built or scaled tools, and know what it takes to get from 1,000 to 10,000+ usersThe drive to build something big and long-term, not just take a jobEither the time to invest in the journey or capital to invest and grow alongside usYou understand that growth requires both smart marketing and hands-on sales, especially early on. While our long-term play is product-led growth, in the short term we need someone who’s not afraid to directly reach out, demo the product, follow up with early users, and close deals all while testing scalable acquisition strategies. You know how to balance scrappy outreach with strategic marketing experiments, and you’re ready to do both.We believe this product can grow substantially, if we get the right person focused on growth, distribution, and product-market fit.What You’ll Be DoingOwn growth: Lead marketing strategy across content, SEO, email, paid, partnerships, and communityLaunch and scale CRM: Drive the recently launched CRM product to grow adoption within existing and new accountsTest, learn, repeat: Validate messaging, channels, ICPs, and pricing—then scale what worksCollaborate on product positioning: Shape how we talk about Tooling Studio to better resonate with agencies, founders, and small businessesIdentify scalable acquisition channels: You’ll have freedom and support to explore and execute growth experimentsWhat You’ll Work WithYou'll partner with Eric, who leads product and brings a strong ability to craft compelling marketing materials, demos, and proof-of-concepts. The foundation is solid: design, messaging, and product are all moving fast.You’ll also have access to a small but skilled team of marketers, designers, and engineers—ready to support any growth tactic you want to explore.Your role is to bring the growth strategy and execution muscle, backed by product and creative firepower.What We OfferA co-founder role in a fast-growing SaaS startup with product-market tractionEquity ownership—negotiated based on your time commitment and milestonesThe opportunity to shape the commercial future of a workspace-native tool suiteA chance to join early and make a lasting impact in a high-potential marketFreedom to execute your vision, with a team ready to support and build fastWhy Now?Tooling Studio has launched two products, surpassed 1,000 users, and started earning recurring revenue. We’re seeing strong engagement from early adopters, and we’re just getting started. The opportunity now is to double down on growth, refine positioning, and find scalable distribution. Interested? Let’s talk. Reach out to Eric directly: eric@tooling.studio Or visit us at https://tooling.studio

Cofounder or Team member

MOVITAS

Milan Membre de l'équipe Entreprise et stratégie Marketing et ventes Temps plein Aucun Flexible (bureau et distant)

About this position:

Co Founder and COO

Insight Questor LLC

Helsinki (Co-)Fondateur Entreprise et stratégie Marketing et ventes Autres Temps plein Baccalauréat 150k-200k 20% - 30% Flexible (bureau et distant)

About this position:

About Insight Questor:Visit the project website here: https://inside-questor-landing.web.app/Insight Questor is a pre-seed AI-driven financial platform aiming to revolutionize personalized investment insights and education. We’re at the beginning of an exciting and ambitious journey, and I’m looking for a partner to join me—not to take the wheel, but to support and complement my leadership as we bring this vision to life.Who You Are:You have proven experience in fundraising, especially at the pre-seed stage, and know how to pitch, negotiate, and close deals with investors.You’ve been part of startups and understand the challenges and opportunities of building a company from scratch.You’re entrepreneurial, resourceful, and ready to support the CEO by taking on key business responsibilities.You believe in the vision of Insight Questor and are willing to take on the adventure of building something transformative.What You’ll Do:Lead fundraising efforts, engaging with investors, venture capitalists, and strategic partners to secure funding.Manage critical business operations, including partnerships, processes, and scaling strategies, allowing me to focus on product development and vision.Act as a trusted advisor and collaborator, providing expertise to help steer the company in the right direction.Help establish the foundation of the company while respecting and working alongside my leadership role as CEO.Nice to Have:Experience in fintech or technology-driven startups.Proficiency in Russian (B1 level or higher), which could assist in communications with CEO and tech team in future.What You Get:A significant equity stake in a high-potential fintech startup, sharing in the success we create together.The opportunity to work alongside a passionate founder on an innovative product with global ambitions.The ability to influence the business without needing to take on a leadership role.Flexible working conditions, including hybrid or onsite collaboration.A chance to build something meaningful and see your efforts make a direct impact on the success of the company.Why Join Insight Questor?If you’re ready to take on an entrepreneurial challenge, help drive a vision forward, and build something groundbreaking, Insight Questor offers an opportunity to be part of a transformative fintech journey.

Marketing cofounder for a blockchain SaaS startup

IC Pack C Corp

Ashkelon (Co-)Fondateur Marketing et ventes Temps partiel Lycée/Enseignement secondaire Aucun > 30% À distance seulement

About this position:

A promising, but pre-money startup requires a marketer cofounder, who will:Develop marketing strategy, such as choice between SEO, PPC, emailImplement this strategyEdit site contentPay all marketing expenses from his own pocket (at this stage)In return about 50% shares will be given to you.The startup is B2B2C, promoting our developer tooling.

Tech Mitgründer CTO gesucht für HealthTech Startup Clynic24

Clynic24

Düsseldorf (Co-)Fondateur Technique Produit et design Temps partiel Aucun À distance seulement

About this position:

Wir bauen Clynic24 – eine Plattform, mit der Kliniken kurzfristig medizinisches Fachpersonal digital anfragen und buchen können. Ziel ist es, Personaldienstleister und Kliniken smart zu vernetzen – ähnlich wie Check24, aber für medizinisches Personal. Die Idee ist validiert, das Pitchdeck steht, und erste Gespräche mit Kliniken laufen.Dafür suchen wir dich – einen tech-affinen Mitgründer (CTO), der das MVP entwickelt und die technische Basis mit aufbaut.Deine AufgabenEntwicklung und Umsetzung eines funktionalen MVPAufbau der Datenlogik (Verfügbarkeiten, Matching, Suchfilter etc.)Mitgestaltung der technischen Struktur, Skalierung und PlattformstrategieÜbernahme der technischen VerantwortungDu bringst mitErfahrung in Webentwicklung (z. B. JavaScript, APIs, Firebase, Datenbanken)Eigenverantwortliches Arbeiten und lösungsorientiertes DenkenInteresse an HealthTech und PlattformmodellenOffenheit für eine Beteiligung (Equity, verhandelbar)Wir bietenEin reales, validiertes Problem aus dem KlinikalltagKlare Vision, strukturiertes Pitchdeck und erste MarktgesprächeGründerrolle mit echter GestaltungsmöglichkeitFlexibles Setup (5–15 Stunden pro Woche möglich)Wenn du Bock auf Verantwortung hast und Lust, etwas aufzubauen, das gebraucht wird – melde dich.

Chief Marketing Officer

GlobalSense TEFL Sole Proprietorship

Kharkiv (Co-)Fondateur Entreprise et stratégie Marketing et ventes Temps partiel Aucun 5% - 10% À distance seulement

About this position:

As CMO, you’ll be responsible for driving awareness, engagement, and growth. You'll take our ready-to-launch product and turn it into a globally recognized brand. You’ll have full ownership of the marketing strategy—from messaging to execution—and play a key role in shaping the company’s voice, reputation, and reach.Key ResponsibilitiesStrategy & BrandingDevelop and execute a clear, scalable marketing strategy aligned with our mission and target audienceShape the brand voice, visual identity, and messaging across all channelsDefine and track key performance indicators (KPIs) to measure marketing successGrowth & AwarenessDesign and manage marketing funnels to drive traffic, leads, and conversionsBuild and execute campaigns across social media, SEO, email, and contentOversee landing pages, lead magnets, and launch materials for TEFL coursesAudience DevelopmentIdentify and research core user personas (e.g., adult learners, HR departments, ESL employers)Develop partnerships with relevant influencers, education platforms, and communitiesGrow and engage a global learner base using culturally relevant storytellingContent & CommunicationsCreate or manage the creation of blog posts, video scripts, ads, and course-related contentOversee website messaging, newsletters, and course launch campaignsSupport PR and outreach efforts to gain media attention or institutional adoptionWho You AreA strategic, hands-on marketer with a growth mindsetExperienced in education, language learning, or global B2C/B2B marketingComfortable working independently, creatively, and collaborativelyStrong storytelling skills—you can turn ideas into emotion and actionExcited to build from scratch and shape the public face of a mission-driven brand

Founding team member

Tethral, Inc. C corporation

Berkeley Membre de l'équipe Entreprise et stratégie Marketing et ventes Temps plein Aucun 1% - 2% Flexible (bureau et distant)

About this position:

Tethral is a privacy-first AI platform that lets users seamlessly orchestrate and control all their smart home and IoT devices—without buying new hardware or surrendering their data. We’re six weeks from MVP launch and moving fast toward a seed round.We’re not building another smart home dashboard. We’re building the interoperability and privacy layer for the next generation of connected environments.What You’ll Do🎯 Design & run early growth experiments (landing pages, content loops, referral programs)🧭 Build and optimize onboarding funnels to drive activation✍️ Write and manage copy, social, email, blog, and in-app messaging📊 Set up and track core growth metrics (activation, retention, CAC, etc.)📣 Engage early users across communities, forums, and social channels📄 Help prep case studies and traction snapshots for investor outreachYou Might Be a Fit If You…Have 2–5 years in growth or product marketing (bonus: B2C apps, privacy tools, IoT)Are comfortable in ambiguity and want to own the growth functionKnow how to drive early user traction on a lean budgetCan write crisp, compelling copy and contentEnjoy being close to the product and the user, not buried in layers of managementHave experience with analytics tools and basic marketing stacksBonus Points ForExperience with mobile app marketing or ASOFamiliarity with smart home users and privacy-conscious communitiesComfortable creating light visuals or using no-code toolsCompensationEquity: ~1.0–1.5%, vesting over 4 yearsPre-seed stipend: Modest cash or milestone-based bonuses possiblePost-seed salary: ~$100K–130K/year (depending on location/experience)Milestone-based rewards tied to traction (e.g. DAUs, waitlist conversions)

Chief Scientific Officer

My Family Story

Luxembourg (Co-)Fondateur Technique Produit et design Temps plein Maîtrise Aucun > 30% À distance seulement

About this position:

Your RoleDefine and lead the scientific vision of the product (AI, semantics, long-term reasoning)Guide architecture choices involving LLMs, Langchain-style agents, and graph traversalEnsure scalability and trustworthiness of automated storytelling from fragmented dataWork closely with the CEO/founder on roadmap, product decisions, and R&D prioritiesYour BackgroundYou may be a senior ML engineer, research scientist, or ex-academic with a strong track record in:LLMs / NLP (OpenAI, Claude, Gemini, etc.)Knowledge graphs / semantic reasoning / symbolic AIMulti-agent systems or Langchain / Autogen / DSPy frameworksProven interest in human-centered AI, storytelling, or digital memoryBonus points for:Experience with data provenance, ethics, or long-term archivingPrevious startup, co-founder, or open-source leadership experienceWhy Join UsThis is a rare opportunity to build something emotionally meaningful and technically ambitious — a system designed to outlast us, preserve memory, and create value for families across time. If you're excited by the challenge of blending AI with narrative, identity, and legacy, we want to hear from you.

Looking for a technical co-founder to serve as CTO and equity partner for an entertainment app startup focused on the performing arts

Applift PTY Ltd

Cape Town (Co-)Fondateur Technique Produit et design Temps plein Baccalauréat 30k-50k 20% - 30% Flexible (bureau et distant)

About this position:

You will be responsible for selecting and implementing a modern, scalable tech stack that ensures app performance, security, and reliability. Experience with cloud platforms (AWS, Google Cloud, or Azure) and mobile development frameworks (React Native, Flutter, or native iOS/Android) is essential. You’ll design efficient APIs and backend systems to handle video uploads, streaming, voting, and real-time notifications with low latency. A key focus will be optimizing the app for low data usage and minimal storage size to ensure accessibility for users in rural and township areas with limited internet connectivity. Building a lightweight, fast-loading app that performs well on low-end devices is critical to delivering a seamless user experience as the platform grows.

Technical co founder

Acc.It

Manama (Co-)Fondateur Produit et design Temps partiel Diplôme/Certificat postsecondaire Aucun > 30% À distance seulement

About this position:

Looking for a technical co-founder who can help me build this idea into a reality. A sofware developer with time to expend and with knowledge or experience in building apps.

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