Senior Software Engineer

Role Description

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.

Qualifications

• 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.

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.