Senior Programmable Voice Engineer (CX Platform)

About the role

Miratech is looking for a Senior Programmable Voice Engineer to build programmable voice capabilities, call control services, media processing and API-driven communications infrastructure similar to Twilio and other CPaaS platforms. The role suits a senior engineer who can move between architecture, code, delivery risk, non-functional requirements and client-facing technical discussions.

Key responsibilities

• Design and develop programmable voice services, APIs and call-control capabilities for enterprise-scale communications platforms.
• Build and extend voice infrastructure using FreeSWITCH, Kamailio, SIP, RTP, WebRTC and related technologies.
• Develop backend services and communication APIs with Java and Spring Boot to expose voice capabilities internally and externally.
• Implement call routing, session management, media handling, carrier integrations and voice traffic processing.
• Design highly available, scalable systems for large volumes of real-time communications traffic.
• Troubleshoot complex signaling, media, telephony and call-quality issues across distributed environments.
• Integrate voice services with contact center, routing, digital engagement, CRM, identity and reporting platforms.
• Define non-functional requirements for availability, performance, concurrency, security, privacy, observability, disaster recovery and supportability.
• Review designs and code, identify technical risks and establish engineering standards, quality gates and documentation expectations.
• Collaborate with client stakeholders, Product, Architecture, QA, DevOps, Security, Operations and vendors to govern delivery.

Required profile

• 8+ years of software engineering experience, including substantial ownership of architecture and technical delivery for distributed applications.
• Deep hands-on expertise with FreeSWITCH and/or Kamailio, including call control, dial plans, media services, ESL, modules and platform customization.
• Experience building API-driven communication platforms, voice services or CPaaS-style solutions.
• Strong knowledge of voice infrastructure and real-time communications, including SIP, RTP, WebRTC, session control, media handling and telephony troubleshooting.
• Expert-level hands-on experience with Java, Spring Boot, microservices, REST APIs, persistence, security, testing and performance engineering.
• Understanding of API-first design, event-driven architecture, messaging, distributed systems and cloud-native engineering.
• Experience with PostgreSQL or comparable relational databases, data modeling, integration flows and transactional design.
• Hands-on experience with contact center or CX platforms and the operational concepts behind customer routing and engagement.
• Excellent communication skills, including clear technical documentation and leading client-facing workshops.

Nice to have

• Experience with OpenSIPS, Asterisk, Twilio, SignalWire or comparable platforms.
• Building routing engines, IVR platforms, voice bots or omnichannel engagement services.
• Experience with Genesys, NICE, Five9, Amazon Connect, Cisco, Avaya or comparable contact center platforms.
• Familiarity with Kafka, RabbitMQ, Kubernetes, Jenkins, observability platforms, API gateways and security architecture.
• Practical experience with AI-assisted software development tools such as Claude or GitHub Copilot.

What we offer

• A comprehensive compensation and benefits package, including health insurance and a relocation program.
• Work from anywhere flexibility.
• Professional development opportunities, including certification programs, mentorship, internal mobility and internship opportunities.
• A multicultural, inclusive global team with regular team-building events.