Senior Software Engineer

About the Company

At Xtend One, we're building a unified B2B business platform that brings CRM, campaign management, customer support, inventory, and more into one connected ecosystem.

Our modular architecture empowers businesses to build tailored solutions while a unified data layer seamlessly connects information, workflows, and operations across every module. The result? No data silos. No disconnected workflows. Just connected operations, cross-functional intelligence, and endless possibilities for automation.

We're on a mission to transform how businesses operate by making their data work together. Join us in building the next generation of enterprise software.

About the Role

We’re looking for a Senior Software Engineer (Backend) to join us as our first employee and become a key part of our founding team. This isn’t a role where you simply pick up tickets and ship features. You’ll have the opportunity to shape our backend architecture, make critical engineering decisions, and build systems that will support our next phase of growth.

What you'll work on

* Design and build scalable, high-performance APIs.

* Architect efficient multi-tenant database solutions.

* Build reliable backend systems that support complex enterprise workflows.

* Improve system performance, reliability, and scalability as the product grows.

* Take ownership of technical decisions, engineering quality, and backend architecture.

What we're looking for

* 5–8 years of experience in software engineering, with strong backend development expertise.

* Proven experience designing and building scalable APIs and backend systems.

* Strong understanding of database design, query optimization, and multi-tenancy.

* An engineering mindset focused on performance, reliability, and maintainability.

* The ability to work independently, make sound technical decisions, and take ownership in an early-stage startup.

* Experience in aws environment, event driven architecture is a plus.

* Prior experience in b2b saas applications is a plus.

Why join Xtend One?

Founding-team ownership: Be part of the team shaping our engineering culture and technical direction from the beginning.

Real architectural impact: Your decisions will influence the foundation we build on for years to come.

Build beyond the code: Work closely with the founders and influence product and engineering decisions.

Scale a validated product: Help take an existing product to its next stage of growth.

Please fill in this form to complete your application : https://tally.so/r/WJ98Aa