

Launchyfi
Founding Full-Stack Developer | AI-first Startup (Equity-based)
⭐ - Featured Role | Apply direct with Data Freelance Hub
This role is for a Founding Full-Stack Developer at an AI-first startup, requiring 5+ years of experience in SaaS development. It offers an equity-only contract for over 6 months, remote work, and expertise in Python, React.js, and Docker.
🌎 - Country
United Kingdom
💱 - Currency
$ USD
-
💰 - Day rate
Unknown
-
🗓️ - Date
October 3, 2025
🕒 - Duration
More than 6 months
-
🏝️ - Location
Remote
-
📄 - Contract
Fixed Term
-
🔒 - Security
Unknown
-
📍 - Location detailed
United Kingdom
-
🧠 - Skills detailed
#Security #API (Application Programming Interface) #SaaS (Software as a Service) #Python #Cloud #Monitoring #CRM (Customer Relationship Management) #DevOps #React #Scala #Leadership #ML (Machine Learning) #AI (Artificial Intelligence) #Deployment #Docker #Automation #Lean #Databases
Role description
Note: This is an equity-only role until fundraise.
Who We Are
We’re two commercial and operational co-founders with a proven track record in growing and scaling companies, including a $43M trade sale. Between us, we’ve led M&A deals, built high-performing teams, and launched multiple startups. After collaborating closely for the past six months, we’ve decided to build something much bigger together.
Now, we're assembling a world-class founding team to bring our vision to life.
We're building the next billion-dollar lean startup, and we’re looking for a forward-thinking technical founding engineer to join us. You’ll be the technical brain behind the product, owning architecture and execution while shaping the future of the business from day one. We're now looking to bolster this great founding team with a forward-thinking technical engineer who shares our enthusiasm and brings equally excellent technical finesse.
To put it bluntly: if you build something great, we’ll sell the sh!t out of it, and we'll have fun doing it! 🚀
About the Role (Experienced builder 5 years as Full-stack)
Step into the role of Founding Full-Stack Developer and be a core architect of our innovative AI-powered SaaS platform. You'll build, optimize, and scale both the frontend and backend, ensuring a seamless experience for our enterprise customers. This is a unique opportunity to define our product roadmap and push the limits of technology in a high-energy startup environment.
This is a rare opportunity to:
• Build real AI systems—not wrappers—with agency, memory, and autonomy
• Own the technical direction of a category-defining product
• Work alongside experienced, go-to-market obsessed founders who know how to scale
Key Responsibilities
💡 Full-Stack Development & Architecture
• Design and deliver scalable, secure, high-performance backend and frontend systems.
• Build intuitive, responsive user interfaces that feel native and frictionless.
• Architect reusable APIs and modular services to power AI-driven product features.
• Embed automation, agentic tools, and internal co-pilots to reduce repetitive work and accelerate dev speed.
☁️ Cloud, DevOps & Deployment
• Define and implement infrastructure and deployment strategies that optimize for speed, stability, and cost.
• Champion CI/CD, infrastructure-as-code, and proactive monitoring from the start.
• Lead authentication, security, and access control strategies across the stack.
🔗 Integrations & Data Systems
• Design reliable, well-structured databases and caching strategies for real-time performance.
• Build clean integrations with 3rd-party SaaS platforms (e.g. CRM, ATS, analytics).
• Help operationalize AI pipelines with our ML/AI co-founders to support features like RAG, smart retrieval, or personalization.
🤝 Collaboration & Technical Leadership
• Partner with the commercial founders to set product priorities and define the technical roadmap.
• Work alongside our AI engineers to integrate LLMs, RAG pipelines, and agentic tools into the user experience.
• Drive a lean engineering culture: automate what can be automated, ship fast, and scale efficiently.
• Lead by example, owning your work, delivering quality, and constantly improving.
Technical Skills / Stack
• Python
• TailwindCSS
• React.js
• Pinecone
• LangGraph
• RESTful API
• Docker
Who You Are
• ✔️ A versatile full-stack engineer with 5+ years of experience building and deploying scalable SaaS applications.
• Willing to join a high performing ambitious team and commit full-time until fundraise.
• ✔️ Equally comfortable building frontends, APIs, systems architecture, or integrations. Solid understanding of cloud infrastructure and services.
• ✔️ A startup-minded innovator who thrives in high-ownership environments and aligns with our core values.
• ✔️ You don’t wait to be told what to do, you figure it out, propose a solution, and get to work.
Why Join Us?
• Ownership & Impact: Be a founding engineer with major influence over our AI/ML infrastructure.
• Innovative Playground: Work on state-of-the-art AI-driven solutions set to revolutionize industries like real estate, recruitment, and GTM automation.
• Growth & Equity: Enjoy early-stage equity with huge upside potential and competitive salary post-funding.
• Dynamic Culture: Join a remote-friendly, flexible team that champions open communication, accountability, and relentless execution.
Benefits
•
•
• Excellent early-stage equity — up to 5.0%.
•
•
• Competitive salary post-funding, aligned with market and contribution.
• True founding role — shape the product, company, and technical culture from day one.
• Work with proven commercial and operational operators — our founding team includes experienced founders with a $43M exit, deep GTM expertise, and a track record of scaling companies.
• Be part of something meaningful — we’re building an AI-first SaaS company tackling real, valuable problems with real-world impact.
• Remote-first work culture — work from anywhere in the world 🌍 .
• Timezone alignment — must be available to collaborate across UTC±2 (e.g., UK, Europe, Africa).
• Flexible hours — async-friendly, outcome-focused team.
• Zero bureaucracy, high trust — full autonomy and ownership from the start.
• Ground-floor opportunity — your decisions, code, and thinking will shape the product, the stack, and the company.
⚠️
•
• Please note:
•
• this is an equity-first founding role until we raise funding. If you’re not comfortable with this structure, we totally understand—but this likely won’t be the right fit.
We’re looking for someone who sees this not just as a job, but as a chance to build something category-defining alongside a team who’ll go all-in with you.
Note: This is an equity-only role until fundraise.
Who We Are
We’re two commercial and operational co-founders with a proven track record in growing and scaling companies, including a $43M trade sale. Between us, we’ve led M&A deals, built high-performing teams, and launched multiple startups. After collaborating closely for the past six months, we’ve decided to build something much bigger together.
Now, we're assembling a world-class founding team to bring our vision to life.
We're building the next billion-dollar lean startup, and we’re looking for a forward-thinking technical founding engineer to join us. You’ll be the technical brain behind the product, owning architecture and execution while shaping the future of the business from day one. We're now looking to bolster this great founding team with a forward-thinking technical engineer who shares our enthusiasm and brings equally excellent technical finesse.
To put it bluntly: if you build something great, we’ll sell the sh!t out of it, and we'll have fun doing it! 🚀
About the Role (Experienced builder 5 years as Full-stack)
Step into the role of Founding Full-Stack Developer and be a core architect of our innovative AI-powered SaaS platform. You'll build, optimize, and scale both the frontend and backend, ensuring a seamless experience for our enterprise customers. This is a unique opportunity to define our product roadmap and push the limits of technology in a high-energy startup environment.
This is a rare opportunity to:
• Build real AI systems—not wrappers—with agency, memory, and autonomy
• Own the technical direction of a category-defining product
• Work alongside experienced, go-to-market obsessed founders who know how to scale
Key Responsibilities
💡 Full-Stack Development & Architecture
• Design and deliver scalable, secure, high-performance backend and frontend systems.
• Build intuitive, responsive user interfaces that feel native and frictionless.
• Architect reusable APIs and modular services to power AI-driven product features.
• Embed automation, agentic tools, and internal co-pilots to reduce repetitive work and accelerate dev speed.
☁️ Cloud, DevOps & Deployment
• Define and implement infrastructure and deployment strategies that optimize for speed, stability, and cost.
• Champion CI/CD, infrastructure-as-code, and proactive monitoring from the start.
• Lead authentication, security, and access control strategies across the stack.
🔗 Integrations & Data Systems
• Design reliable, well-structured databases and caching strategies for real-time performance.
• Build clean integrations with 3rd-party SaaS platforms (e.g. CRM, ATS, analytics).
• Help operationalize AI pipelines with our ML/AI co-founders to support features like RAG, smart retrieval, or personalization.
🤝 Collaboration & Technical Leadership
• Partner with the commercial founders to set product priorities and define the technical roadmap.
• Work alongside our AI engineers to integrate LLMs, RAG pipelines, and agentic tools into the user experience.
• Drive a lean engineering culture: automate what can be automated, ship fast, and scale efficiently.
• Lead by example, owning your work, delivering quality, and constantly improving.
Technical Skills / Stack
• Python
• TailwindCSS
• React.js
• Pinecone
• LangGraph
• RESTful API
• Docker
Who You Are
• ✔️ A versatile full-stack engineer with 5+ years of experience building and deploying scalable SaaS applications.
• Willing to join a high performing ambitious team and commit full-time until fundraise.
• ✔️ Equally comfortable building frontends, APIs, systems architecture, or integrations. Solid understanding of cloud infrastructure and services.
• ✔️ A startup-minded innovator who thrives in high-ownership environments and aligns with our core values.
• ✔️ You don’t wait to be told what to do, you figure it out, propose a solution, and get to work.
Why Join Us?
• Ownership & Impact: Be a founding engineer with major influence over our AI/ML infrastructure.
• Innovative Playground: Work on state-of-the-art AI-driven solutions set to revolutionize industries like real estate, recruitment, and GTM automation.
• Growth & Equity: Enjoy early-stage equity with huge upside potential and competitive salary post-funding.
• Dynamic Culture: Join a remote-friendly, flexible team that champions open communication, accountability, and relentless execution.
Benefits
•
•
• Excellent early-stage equity — up to 5.0%.
•
•
• Competitive salary post-funding, aligned with market and contribution.
• True founding role — shape the product, company, and technical culture from day one.
• Work with proven commercial and operational operators — our founding team includes experienced founders with a $43M exit, deep GTM expertise, and a track record of scaling companies.
• Be part of something meaningful — we’re building an AI-first SaaS company tackling real, valuable problems with real-world impact.
• Remote-first work culture — work from anywhere in the world 🌍 .
• Timezone alignment — must be available to collaborate across UTC±2 (e.g., UK, Europe, Africa).
• Flexible hours — async-friendly, outcome-focused team.
• Zero bureaucracy, high trust — full autonomy and ownership from the start.
• Ground-floor opportunity — your decisions, code, and thinking will shape the product, the stack, and the company.
⚠️
•
• Please note:
•
• this is an equity-first founding role until we raise funding. If you’re not comfortable with this structure, we totally understand—but this likely won’t be the right fit.
We’re looking for someone who sees this not just as a job, but as a chance to build something category-defining alongside a team who’ll go all-in with you.