Senior Backend Engineer

Senior Backend Engineer

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

• Participate in CI/CD and operational practice with the team so changes ship safely and often.
• Support production and customer-impacting issues with clear communication and durable fixes.
• Document and share technical context so the codebase remains maintainable as the team grows.
• Provide technical leadership, code review, architectural guidance, and mentorship to junior developers.

Qualifications — Experience

• 5+ years of professional backend engineering experience, with at least 2 years at a senior level.
• Strong, demonstrated production experience with PHP or Go (Golang).
• Hands-on MySQL/MariaDB experience in production environments.
• Experience navigating a scale-up/growth-stage company or an enterprise-scale organization.
• Telephony, dialer, CCaaS, or telco-adjacent domain experience is strongly preferred.

Qualifications — Skills

• Proven track record of owning backend systems end to end — including design, implementation, deployment, monitoring, and iteration.
• Experience with RESTful API design and implementation.
• Familiarity with event-driven architecture, background processing, or event sourcing patterns.
• Self-directed individual who takes ownership without being asked.
• Proactively communicates risks and blockers to teammates and stakeholders.
• Able to take an ambiguous problem, propose an approach, gain alignment, and deliver with minimal hand-holding.

What Success Looks Like

• First 90 Days: Independently trace a request from API entry to database and back, and ship at least one meaningful pull request to production within 30 days.
• First 180 Days: Deliver a visible, measurable improvement in the owned area — such as latency reduction, uptime improvement, or query optimization.
• End of Year One: Own at least one core backend area with full accountability for its reliability, performance, and roadmap, leaving it meaningfully easier to build on than when you joined.
• Culture Impact: Contribute to the engineering team's culture of documentation, code quality, and operational discipline in a way that makes the whole team more effective.

Opportunity

This is a rare opportunity to join a small, fast-moving B2B SaaS team where engineering decisions have immediate, visible impact on the product and on revenue. What you build, customers feel. You will serve as a senior technical leader, own critical backend systems end to end, and help shape the architecture of a platform in high-growth mode — all while working alongside a senior, highly collaborative engineering team that values pragmatism, documentation, and craftsmanship.

Application Process

• Fill in the application form
• Record a video showcasing your skill sets