I’m bringing a new web application online and need several third-party software APIs wired in cleanly so the platform can pull, push and visualise data in real time. Although the APIs span different vendors, think along the lines of SaaS CRMs, marketing tools and other business software rather than just the usual payment or social media endpoints. The core of the build is already in place; your focus will be: • Connecting each REST/JSON endpoint securely (OAuth 2.0 where available) • Normalising the incoming data so it slots straight into our PostgreSQL database • Exposing clear service classes or micro-services that future features can call • Powering a lightweight analytics module so users can explore the aggregated data through charts and export options I’m working with a React front end and Node.js/Express back end, so familiarity there is ideal, but I’m open to other solid approaches if you can justify the fit. Code quality matters—well-named functions, concise documentation and meaningful commit history are part of the acceptance criteria. Please let me know the similar integrations you’ve completed, any SDKs or middleware you prefer, and your estimated turnaround for the first working connection.