At Voxie, we believe conversation is the future. We've created the only SMS platform purpose-built for franchises, helping national brands drive local results across 15,000+ locations. Our AI-enhanced texting solution transforms how multi-unit businesses engage customers, drive sales, and stay compliant all with a few clicks.
Role Overview
The Senior Software Engineer builds and owns the integrations that connect Voxie's conversational platform to the systems our customers run their businesses on: CRMs, POS platforms, marketing tools, and messaging providers. This is a backend-focused role for an engineer who can take a rough integration requirement, ask the right questions, and ship a system that holds up at high message volume. You will scope work directly with our sales engineers and solutions engineers, with third-party platform teams, and at times with a customer's own technical staff. Strong communication matters here as much as strong code.
What You'll Be Doing
Integration Engineering
- Design, build, and maintain integrations with third-party platforms using REST APIs, webhooks, SFTP, and batch data pipelines.
- Turn ambiguous requirements into working systems: gather what you need from sales engineers, solutions engineers, and partner platform teams, then build it.
- Work directly with third-party providers and customers' engineering teams to scope, validate, and troubleshoot integrations.
- Handle high-throughput messaging workloads with careful attention to rate limits, retries, idempotency, and failure recovery.
Software Development & Architecture
- Design, develop, and maintain high-quality, testable, scalable backend systems in PHP and TypeScript.
- Extend our distributed systems architecture for reliability, scalability, and cost efficiency.
- Use AI tools to accelerate delivery and automate processes end to end, so your time goes to high-value orchestration and reliability work.
- Write code that both humans and AI agents can understand, modify, and extend.
Cloud & Infrastructure
- Build serverless and distributed solutions on AWS (Lambda, RDS, DynamoDB, SNS, SQS).
- Design systems for security, resilience, and operational efficiency.
- Contribute to infrastructure-as-code and CI/CD automation.
Collaboration & Process
- Participate in Agile ceremonies and contribute to scoping and design discussions.
- Partner with Product, Sales, and Customer Success to deliver integrations that close deals and keep customers.
- Provide mentorship and code reviews that raise the team's engineering standard.
Quality & Testing
- Build and maintain automated test suites with PHPUnit, Jest, and GitHub Actions.
- Hold the line on testing, code review, and monitoring.
What We're Looking For
Must Haves
- 5+ years of professional backend development experience with PHP (Laravel), TypeScript, or similar.
- Proven experience building and maintaining third-party integrations: REST APIs, webhooks, OAuth, SFTP, and batch data exchange.
- Experience with high-throughput or high-volume messaging systems.
- Solid understanding of distributed systems, API design, and database design.
- Working knowledge of AWS, particularly Lambda, RDS, DynamoDB, SQS, and SNS.
- Experience with automated test frameworks and CI/CD pipelines.
- Practical use of AI coding tools to ship faster, with the judgment to know where they help and where they don't.
- Strong communication skills: comfortable gathering requirements from non-engineers and speaking directly with customer technical teams.
- Our primary language is English, but we speak Portuguese, Spanish, Ukrainian, and French, so far!
Preferred
- Experience at, or integrating deeply with, CPaaS platforms such as Twilio, Sinch, Vonage, or Bandwidth.
- Background in telecom or SMS infrastructure (10DLC, carrier compliance, deliverability).
- Cybersecurity experience.
- Serverless architecture experience.
- Enough frontend fluency (Vue.js, Tailwind) to build and maintain internal integration tooling and dashboards without waiting on another team.