SeniorBackendEngineer

This role is open to candidates based in LATAM, Africa, and Eastern Europe. Please note that as this role supports U.S.-based clients, candidates must be available to work during U.S. business hours aligned with the client’s time zone.   Client Overview Our client is a B2B SaaS company operating at the intersection of telephony and caller ID reputation management. They serve business customers who depend on reliable, high-performance backend infrastructure to power mission-critical communications workflows. The engineering team is small, senior, and moves fast — shipping frequently with a strong culture of documentation, operational discipline, and code quality. They are growing on their own revenue, deliberately, and they build systems where engineering decisions have an immediate, visible impact on product outcomes and customer experience.     Role Overview The Senior Backend Engineer will design, build, and operate the backend systems that power a high-growth B2B SaaS platform, owning meaningful features and services end to end. This role requires depth on the server side, sound judgment under ambiguity, and a bias toward pragmatic solutions built primarily in PHP and Go on MySQL/MariaDB. The Senior Backend Engineer will serve as a senior technical leader alongside the Staff Software Engineer, contributing directly to platform reliability, performance, and roadmap.     Location Fully Remote (Work from Home) | 9AM - 5PM PST     Key Responsibilities Architecture & Implementation - Architect, implement, and maintain scalable backend services and APIs in PHP and Go. - Handle integrations and background processing as the product requires.   Data Modeling & Performance - Own data modeling and persistence, including relational databases and caching. - Ensure sound schema design, efficient queries, and operational resilience using MySQL/MariaDB. - Profile, debug, and tune performance; contribute automated tests where they materially reduce risk.   Operations & Mentorship