Senior AI Software Engineer | Full-Stack SaaS Development & AI Integration

Posted 3 hours ago

Worldwide

Summary

We are looking for an experienced Senior Full-Stack Developer to join our long-term product development initiative focused on building and enhancing AI-powered software solutions. The ideal candidate should have strong experience in designing scalable SaaS applications, integrating AI capabilities, developing secure backend services, and delivering high-quality web applications using modern technologies. Responsibilities include: Design and develop scalable web applications Build and maintain backend APIs and business logic Integrate AI services and large language models (LLMs) Develop responsive frontend applications Design and optimize databases Implement authentication and role-based access control Integrate third-party APIs and cloud services Optimize application performance, security, and scalability Participate in architecture discussions and technical planning Write clean, maintainable, and well-documented code Support deployment, testing, and ongoing product enhancements Preferred Skills: ASP.NET Core / C# React or Next.js SQL Server or PostgreSQL REST APIs Azure or AWS Docker Git AI/LLM integration (OpenAI, Anthropic, Azure OpenAI, or similar) Nice to Have: Experience building SaaS platforms Enterprise application development Payment gateway integrations DevOps and CI/CD Mobile application experience This is a long-term opportunity for a developer who enjoys building scalable products, contributing to technical decisions, and working closely with stakeholders to deliver high-quality software. We value strong communication, ownership, and a problem-solving mindset.

  • More than 30 hrs/week
    Hourly
  • 6+ months
    Duration
  • Expert
    Experience Level
  • $20.00

    -

    $25.00

    Hourly
  • Remote Job
  • Ongoing project
    Project Type
Skills and Expertise
Mandatory skills
ASP.NET Core
C#
API Integration
Activity on this job
  • Proposals:50+
  • Interviewing:
    1
  • Invites sent:
    1
  • Unanswered invites:
    0
About the client
Member since Feb 15, 2017
  • United States
    Bel Air5:33 PM
  • $435K total spent
    114 hires, 26 active
  • 24,704 hours
  • Tech & IT
    Small company (2-9 people)

Explore similar jobs on Upwork

Senior .NET Developer (Azure & Blazor)Hourly‐ Posted 1 week ago
Blazor
O2C Integration and Data Migration LeadHourly‐ Posted 1 week ago
API Integration
Data Migration
Customer Relationship Management

How it works

  • Post a job icon
    Create your free profile
    Highlight your skills and experience, show your portfolio, and set your ideal pay rate.
  • Talent comes to you icon
    Work the way you want
    Apply for jobs, create easy-to-by projects, or access exclusive opportunities that come to you.
  • Payment simplified icon
    Get paid securely
    From contract to payment, we help you work safely and get paid securely.
Want to get started? Create a profile

About Upwork

  • Rating is 4.9 out of 5.
    4.9/5
    (Average rating of clients by professionals)
  • G2 2021
    #1 freelance platform
  • 49,000+
    Signed contract every week
  • $2.3B
    Freelancers earned on Upwork in 2020

Find the best freelance jobs

Growing your career is as easy as creating a free profile and finding work like this that fits your skills.

Trusted by

  • Microsoft Logo
  • Airbnb Logo
  • Bissell Logo
  • GoDaddy Logo