Senior Programmable Voice Engineer (CX Platform)

Miratech; New York (NY); Remote; USD 140,000 - 210,000; Full time

Benefits offered by this job

Health insurance

Relocation program

Remote work

Certification programs

Mentorship

Career development

Internal mobility

Job summary

Miratech is seeking a Senior Programmable Voice Engineer to design and build scalable voice platforms powering next-generation customer experiences. You’ll work with FreeSWITCH, Kamailio, SIP, WebRTC, and Java/Spring Boot to expose voice capabilities through APIs and services used across enterprise apps.

The role requires 8+ years of hands-on software engineering, strong knowledge of real-time voice systems, and experience delivering API-driven platforms.

Qualifications

• 8+ years of software engineering experience with architecture ownership.
• Deep hands-on expertise with FreeSWITCH and Kamailio, including call control and media services.
• Experience building API-driven communication platforms / CPaaS-style solutions.
• Strong knowledge of voice infra and real-time communications (SIP, RTP, WebRTC).
• Expert-level Java, Spring Boot, microservices, REST APIs, security and performance engineering.
• API-first design, event-driven architecture and distributed systems knowledge.
• Experience with relational databases and data modeling (PostgreSQL).
• Hands-on with CX platforms and customer routing concepts.
• Excellent communication and ability to lead client workshops.

Responsibilities

• Design and develop programmable voice services, APIs, and call-control capabilities for enterprise-scale platforms.
• Build and extend voice infrastructure using FreeSWITCH, Kamailio, SIP, RTP, WebRTC.
• Design backend services and APIs in Java/Spring Boot to expose voice capabilities.
• Implement call routing, session management, media handling, and carrier integrations.
• Design highly available, scalable systems for real-time traffic.
• Troubleshoot signaling, media, telephony issues across distributed environments.
• Integrate voice services with contact center, CRM, and analytics platforms.
• Define non-functional requirements for availability, security, observability, DR.
• Review designs and code; manage risks and drive pragmatic decisions.
• Establish engineering standards and reusable patterns.
• Collaborate with stakeholders to govern delivery and resolve issues.

Skills

Architectural ownership

Distributed systems

API-first design

Client workshops

Communication skills

Tools

FreeSWITCH

Kamailio

SIP

WebRTC

Java

Spring Boot

PostgreSQL

Job description

Miratech helps visionaries change the world. We are a global IT services and consulting company that brings together enterprise and start-up innovation. Today, we support digital transformation for some of the world's largest enterprises. By partnering with both large and small players, we stay at the leading edge of technology, remain nimble even as a global leader, and create technology that helps our clients further enhance their business. We are a values-drivenorganizationand our culture of Relentless Performance has enabled over 99% ofMiratech'sengagements to succeed by meeting or exceeding our scope, schedule, and/or budgetobjectivessince ourinceptionin 1989.Miratech has coverage across 5 continents andoperatesin over 25 countries around the world. Miratech retainsnearly 1000full-time professionals, and our annual growth rate exceeds 25%.

Job Description

We are looking for a

Senior Programmable Voice Engineer

to develop programmable voice capabilities, call control services, media processing, and API-driven communications infrastructure similar to Twilio and other CPaaS platforms. The role includes designing and building the voice platform powering next-generation customer experience solutions using technologies such as FreeSWITCH, Kamailio, SIP, WebRTC, Java, and Spring Boot. It suits a senior engineer who can move confidently between architecture, code, delivery risk, non-functional requirements, and client-facing technical discussions.

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.
• Design and develop backend services and communication APIs using Java and Spring Boot to expose voice capabilities to internal and external applications.
• Implement call routing, session management, media handling, carrier integrations, and voice traffic processing solutions.
• Design highly available, scalable systems capable of handling 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, challenge assumptions, and drive pragmatic decisions that balance quality, time, and cost.
• Establish engineering standards, reusable patterns, quality gates, documentation expectations, and technology adoption guidance.
• Collaborate with client stakeholders, Product, Architecture, QA, DevOps, Security, Operations, and vendors to govern delivery and resolve critical technical issues.

Qualifications

• 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.
• Deep 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 data 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 the ability to produce clear technical documentation and lead client-facing workshops.

Nice to Have

• Experience with OpenSIPS, Asterisk, Twilio, SignalWire, or comparable communications platforms.
• Experience 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 or RabbitMQ, Kubernetes, Jenkins, observability platforms, API gateways, and security architecture.
• Practical experience with AI-assisted software development or AI-enabled solutions, including tools such as Claude or GitHub Copilot, is a plus.

Additional Information

We offer:

Culture of Relentless Performance:

join an unstoppable technology development team with a 99% project success rate and more than 30% year-over-year revenue growth.

Competitive Pay and Benefits:

enjoy a comprehensive compensation and benefits package, including health insurance, and a relocation program.

Work From Anywhere Culture:

make the most of the flexibility that comes with remote work.

Growth Mindset:

reap the benefits of a range of professional development opportunities, including certification programs, mentorship and talent investment programs, internal mobility and internship opportunities.

Global Impact:

collaborate on impactful projects for top global clients and shape the future of industries.

Welcoming Multicultural Environment:

be a part of a dynamic, global team and thrive in an inclusive and supportive work environment with open communication and regular team-building company social events.

Social Sustainability Values:

join our sustainable business practices focused on five pillars, including IT education, community empowerment, fair operating practices, environmental sustainability, and gender equality.*

Miratech is an equal opportunity employer and does not discriminate against any employee or applicant for employment on the basis of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity, or any other protected status under applicable law.