Full-Stack Developer for Existing SaaS + Mobile App Development

We are looking for an experienced Full-Stack Developer to work on a pre-existing SaaS platform and also help build related mobile apps.
This role is for someone who can step into an existing system, understand the current architecture, improve what is already built, fix issues, add features, and help us expand into mobile.
You should be comfortable working across both front end and back end, and also have experience creating or contributing to mobile applications for iOS and Android.
What we need help with:
Working on an existing SaaS product already in development
Improving functionality, fixing bugs, and refining user experience
Building new features and modules
Reviewing and understanding current code before making changes
Assisting with database, APIs, and third-party integrations
Helping plan and develop mobile app versions connected to the SaaS
Making recommendations for better structure, speed, scalability, and security
Coordinating with our team and giving clear updates on progress
Required skills:
Strong full-stack development experience
Experience working on existing/live SaaS products, not just building from scratch
Mobile app development experience
Experience with API integration
Ability to troubleshoot and improve pre-existing code
Good communication and ability to explain technical work in simple terms
Able to work independently and also collaborate with a team
To apply, please send ALL of the following:
A short introduction about yourself and your experience
The technologies/frameworks you work with
Examples of SaaS platforms you have worked on
Examples of mobile apps you have created or helped build
Links, screenshots, portfolio, GitHub, case studies, or live projects
A brief explanation of what part you handled in each project
Your hourly rate and/or fixed monthly rate
A rough quote range for:
ongoing SaaS improvements/maintenance
adding new SaaS features
building a mobile app connected to an existing SaaS
Your availability per week
Your expected turnaround time for tasks and communication
Important:
Please do not apply unless you can show real past work. We want to see projects you have actually built or significantly contributed to.
When you apply, start your message with: “SaaS + Mobile Expert” so we know you read the full post.
We are looking for someone dependable, skilled, and proactive who can grow with us long-term.