Senior Full Stack Developer for SaaS Platform Enhancements

Posted 2 days ago

Worldwide

Summary

We are looking for an experienced Full Stack Developer to help improve our existing SaaS platform. The application is already live, and we need support with feature enhancements, dashboard improvements, API integrations, UI updates, performance optimization, and bug fixes. This is not a greenfield project. We are looking for someone who can quickly understand the existing codebase, implement new functionality, improve user experience, and deliver clean, production-ready code. Responsibilities Develop new features across the frontend and backend Improve existing dashboard workflows Build reusable React/Next.js components Extend backend APIs using Node.js Optimize application performance Fix bugs and improve application stability Integrate third-party APIs where required Improve responsive layouts and user experience Review and refactor existing code Participate in technical discussions and planning

  • $400.00

    Fixed-price
  • Expert
    Experience Level
  • Remote Job
  • One-time project
    Project Type
Skills and Expertise
Mandatory skills
React
Next.js
Node.js
TypeScript
Activity on this job
  • Proposals:50+
  • Last viewed by client:yesterday
  • Hires:
    1
  • Interviewing:
    0
  • Invites sent:
    0
  • Unanswered invites:
    0
About the client
Member since Sep 16, 2025
  • United States
    Indiana1:37 AM
  • $10K total spent
    397 hires, 8 active
  • 110 hours
  • Art & Design
    Small company (2-9 people)

Explore similar jobs on Upwork

Multiplayer Card gameHourly‐ Posted 3 weeks ago
Native App Development
AngularJS
TypeScript
Node.js
JavaScript
React
MongoDB
MySQL
Amazon Web Services
Redis
Socket.io
Web Design
ExpressJS
NodeJS Framework
Game Development
RESTful API
Bullhorn CRM Data ImportHourly‐ Posted 4 weeks ago
Laravel
Node.js
PHP
WordPress
API Integration
Vue.js
CodeIgniter
API Development
Bullhorn
WordPress Development
OpenCart
LangChain
Generative AI
AI Agent Development
Python

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