Senior Full-stack app developer (Part-time, Equity only)

Senior Full-Stack App Developer — KefiloAbout Kefilo
Kefilo is a NutritionTech and personalised wellness transformation company focused on functional nutrition, preventive wellness, gut health, fitness and lifestyle redesign. We are building technology that connects personalised nutrition, transformation programs, customer data and intelligent recommendations into a scalable wellness ecosystem.
Role
Senior Full-Stack App Developer
Engagement
Equity-based founding team opportunity
Part-time: 20–25 hours/week
Remote / Hybrid
Long-term ownership role
No fixed salary at the current stage; compensation will evolve after funding and revenue stabilisation
Key Responsibilities
Mobile & Web Application Development — Build and maintain scalable mobile and web applications for Kefilo's personalised nutrition and 90-day transformation ecosystem.
Full-Stack Architecture — Design and develop frontend, backend, APIs, databases, authentication, cloud infrastructure and integrations required for the product.
Personalisation & Nutrition Intelligence — Integrate nutrition data, customer assessments, personalised plans, transformation metrics and the Nutrition Intelligence Engine into the application.
Customer Journey Development — Build complete digital journeys covering onboarding, assessments, subscriptions, personalised nutrition, fitness, consultations, daily activities, progress tracking and retention.
Dashboard & Data Systems — Develop customer, consultant and internal dashboards for tracking transformation, engagement, compliance, subscriptions and key performance metrics.
API & Third-Party Integrations — Integrate payment systems, communication tools, wearables, health/fitness data sources and other third-party services where required.
Performance, Security & Scalability — Ensure application security, data privacy, performance, reliability and architecture capable of scaling across multiple cities and customer segments.
Product Collaboration — Work closely with founders, nutritionists, fitness experts, food scientists, data scientists and product designers to convert business and wellness requirements into functional technology.
AI & Automation Integration — Support integration of AI, automation and data-driven capabilities as Kefilo's Nutrition Intelligence platform evolves.
Product Ownership & Execution — Take ownership of development cycles, technical decisions, debugging, deployment, documentation and continuous product improvement.
Ideal Candidate
4+ years of strong full-stack development experience
Strong experience building mobile applications and web platforms
Proficiency in technologies such as React / React Native, Node.js, Python, APIs and SQL/NoSQL databases
Experience with cloud infrastructure, authentication, payments and third-party integrations
Strong understanding of scalable application architecture
Experience working with startups, SaaS, HealthTech, NutritionTech, WellnessTech or consumer technology is a plus
Ability to work independently and take ownership of the complete technology stack
Product-oriented mindset rather than only task-based development
What You Will Build
You will be part of the core technology team building Kefilo's digital transformation ecosystem — from customer onboarding and personalised nutrition to intelligence, tracking, subscriptions, consultant interactions and long-term customer engagement.
Equity & Founding Opportunity
This is not a conventional salaried developer position. We are looking for someone who wants to take technical ownership and build with Kefilo for the long term.
Equity Will Be Considered Based On
Technical contribution
Responsibility and ownership
Time commitment
Experience and expertise
Long-term involvement
Impact on the company's technology and product development
Core founding team members will follow a structured vesting arrangement, typically over 5 years.
If you are primarily looking for a fixed-salary development role, this opportunity may not be suitable at the current stage. If you want to build a meaningful NutritionTech company and participate in its long-term value creation, we would be interested in speaking with you.
Skills: stack,android studio,data,app

Work arrangement
No