Software Engineer (Backend)

Why This Role Stands Out

At ReplyQuick, you won’t just be writing code, you’ll be leading the backend core of one of the fastest-growing SaaS startups in the U.S. Our product powers missed-call text rescue, inbound SMS agents, compliance rules, number pooling, and carrier integrations — telecom-grade systems where reliability, compliance, and scale are non-negotiable.

This role begins as an 8–12 week unpaid period, with the potential to transition into a full-time paid offer once funding is secured. What makes it unique is the visibility: dozens of recruiters and investors are already watching our growth, and engineers on our team are gaining career-defining exposure in the startup space.

You’ll be joining a 15+ person development team with talent across frontend, backend, and integrations. Your role is to own the backend direction in telecom and messaging infrastructure, designing systems, mentoring developers, and ensuring we ship production-grade backend code that powers thousands of live customer conversations.

If you want the challenge of solving real-time, high-throughput telecom API problems while guiding a team, and the chance to build a name in one of the most visible startups right now, this is your opportunity.

The Role

We are hiring one Software Engineer (Backend) to join our team immediately.

You will be responsible for architecting, scaling, and optimizing backend infrastructure that directly powers customer conversations, ensuring compliance and performance across thousands of users.

You’ll also take on a leadership role within the engineering team, mentoring other developers, reviewing code, and aligning backend systems with our product roadmap.

Key Responsibilities

• Architect and scale backend APIs for real-time communications and event-driven systems
• Guide and mentor a team of developers, ensuring best practices and code quality
• Own the design of message-processing workflows (webhooks, retries, queues, rate limits)
• Implement compliance guardrails (STOP/HELP handling, opt-in flows, DNC scrubbing)
• Monitor and troubleshoot performance (carrier errors, throughput, latency)
• Collaborate with frontend engineers to integrate backend services seamlessly into the product
• Serve as the go-to backend leader for both developers and leadership

Requirements

• Proven experience with backend telecom or messaging systems (Twilio, Telnyx, Bandwidth, Plivo, or similar APIs)
• Senior-level backend experience (Node.js, Python, or similar) with event-driven and API-heavy systems
• Ability to lead teams, mentor developers, and set technical direction
• Strong knowledge of databases (Postgres preferred), queues (Redis, SQS, or similar), and scaling systems
• Experience with real-time APIs or high-throughput services (payments, messaging, adtech, SaaS infra, etc.)
• Excellent communication skills, able to guide both devs and leadership
• Comfortable working in a fast-paced SaaS startup environment

Details

• Role: Software Engineer (Backend), SaaS Communications Platform
• Duration: 8–12 weeks (unpaid internship period)
• Hours: ~25 hours per week, flexible within agreed hours
• Compensation: Unpaid for 8–12 weeks, if funding is secured during or after the internship, a full-time paid role will be offered
• Location: Remote
• Working Hours: Core hours 10:00 AM – 4:00 PM PST (flexible beyond)
• Meetings: Morning kickoff, end-of-day alignment
• Start Date: Immediate
• Team Size: 15+ developers, 30+ overall team

Why Join Us?

• Lead the backend engineering efforts of a fast-scaling SaaS startup
• Work with a highly talented, motivated dev team where collaboration is key
• Build production-grade infrastructure powering live customer conversations
• Gain career-defining experience in real-time communications and compliance-driven SaaS
• Be part of one of the most visible early-stage startups in the space, with recruiters and investors actively watching our growth
• Potential to transition into a full-time paid role once funding is secured