Senior Software Engineer, Backend (Voice Platform) Job at Cresta (Toronto)

Senior Software Engineer, Backend (Voice Platform)

At Cresta, the Voice Platform team is on a mission to transform real-time voice ...

Location

Romania , Bucharest

Salary:

Not provided

Cresta

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science or related field
5+ years of experience in backend system development, distributed systems, or cloud infrastructure
Expertise in Go (or a similar systems language) with strong API and service design skills
Proven experience with scalable architectures using microservices, workflow orchestration, distributed caching, and cloud databases
Strong knowledge of Kubernetes, Docker, and modern cloud infrastructure
Solid understanding of networking, real-time communication protocols, and cloud security best practices
Demonstrated ability to lead complex technical projects from design through production

Job Responsibility

Lead the design and development of scalable, distributed backend microservices in Golang (with some Python for AI-related services)
Own and evolve voice platform integrations with large-scale enterprise communication and contact center systems
Drive initiatives to expand platform capabilities, including bi-directional SIP, WebRTC integrations, multilingual support, advanced transcription, and real-time translation
Build systems that power conversation intelligence for both remote and in-person interactions
Improve observability, reliability, and self-service troubleshooting across the platform
Ensure performance, scalability, and resilience of real-time voice pipelines running in the cloud
Collaborate with cross-functional teams (ML, product, solution architects) to design end-to-end solutions for customer deployments
Provide technical guidance, mentorship, and best practices to other engineers on the team

What we offer

Compensation for this position includes a base salary, equity, and a variety of benefits

Senior Software Engineer - Customer Experience Platform

As a Software Engineer on the CX Platform team, you will design, build, and evol...

Location

Ireland

Salary:

Not provided

Hopper

Expiration Date

Until further notice

Requirements

3+ years of experience in software engineering, ideally building large-scale distributed systems or customer-facing applications
A strong technical background with modern frontend and backend development, distributed systems, APIs, and cloud infrastructure
Experience designing, building, and maintaining RESTful APIs, microservices, or event-driven systems
Experience with databases (PostgreSQL, MySQL, NoSQL) and cloud platforms (AWS, GCP, or similar)
Ability to break down complex problems, make pragmatic tradeoffs, and ship iteratively
Strong communication skills and comfort collaborating with cross-functional teams

Job Responsibility

Design, build, and improve the backend and/or full-stack systems that power HTS Assist, internal agent tools, and customer self-serve flows
Develop scalable APIs, microservices, and orchestration logic that support complex post-booking journeys across AI, chat, voice, and web
Partner with product, design, AI, and operations teams to deliver features that streamline customer experiences and enhance agent efficiency
Integrate with external systems, such as telephony, CRM, identity, or booking platforms, to support both internal use cases and partner deployments
Own features end-to-end, from technical design through implementation, testing, deployment, monitoring, and iteration
Contribute to architectural decisions, code reviews, reliability improvements, and ongoing enhancements to engineering best practices
Analyze system performance and user behavior to identify opportunities for automation, optimization, and cost reduction

Fulltime

Senior Software Engineer - Customer Experience Platform

As a Software Engineer on the CX Platform team, you will design, build, and evol...

Location

Canada , Toronto; Vancouver

Salary:

Not provided

Hopper

Expiration Date

Until further notice

Requirements

3+ years of experience in software engineering, ideally building large-scale distributed systems or customer-facing applications
A strong technical background with modern frontend and backend development, distributed systems, APIs, and cloud infrastructure
Experience designing, building, and maintaining RESTful APIs, microservices, or event-driven systems
Experience with databases (PostgreSQL, MySQL, NoSQL) and cloud platforms (AWS, GCP, or similar)
Ability to break down complex problems, make pragmatic tradeoffs, and ship iteratively
Strong communication skills and comfort collaborating with cross-functional teams

Job Responsibility

Design, build, and improve the backend and/or full-stack systems that power HTS Assist, internal agent tools, and customer self-serve flows
Develop scalable APIs, microservices, and orchestration logic that support complex post-booking journeys across AI, chat, voice, and web
Partner with product, design, AI, and operations teams to deliver features that streamline customer experiences and enhance agent efficiency
Integrate with external systems, such as telephony, CRM, identity, or booking platforms, to support both internal use cases and partner deployments
Own features end-to-end, from technical design through implementation, testing, deployment, monitoring, and iteration
Contribute to architectural decisions, code reviews, reliability improvements, and ongoing enhancements to engineering best practices
Analyze system performance and user behavior to identify opportunities for automation, optimization, and cost reduction

Fulltime

Senior Software Engineer - Customer Experience Platform

As a Software Engineer on the CX Platform team, you will design, build, and evol...

Location

Salary:

Not provided

Hopper

Expiration Date

Until further notice

Requirements

3+ years of experience in software engineering, ideally building large-scale distributed systems or customer-facing applications
A strong technical background with modern frontend and backend development, distributed systems, APIs, and cloud infrastructure
Experience designing, building, and maintaining RESTful APIs, microservices, or event-driven systems
Experience with databases (PostgreSQL, MySQL, NoSQL) and cloud platforms (AWS, GCP, or similar)
Ability to break down complex problems, make pragmatic tradeoffs, and ship iteratively
Strong communication skills and comfort collaborating with cross-functional teams

Job Responsibility

Design, build, and improve the backend and/or full-stack systems that power HTS Assist, internal agent tools, and customer self-serve flows
Develop scalable APIs, microservices, and orchestration logic that support complex post-booking journeys across AI, chat, voice, and web
Partner with product, design, AI, and operations teams to deliver features that streamline customer experiences and enhance agent efficiency
Integrate with external systems, such as telephony, CRM, identity, or booking platforms, to support both internal use cases and partner deployments
Own features end-to-end, from technical design through implementation, testing, deployment, monitoring, and iteration
Contribute to architectural decisions, code reviews, reliability improvements, and ongoing enhancements to engineering best practices
Analyze system performance and user behavior to identify opportunities for automation, optimization, and cost reduction

Fulltime

Senior Software Engineer - Customer Experience Platform

As a Software Engineer on the CX Platform team, you will design, build, and evol...

Location

United States , Chicago; New York; California

Salary:

Not provided

Hopper

Expiration Date

Until further notice

Requirements

3+ years of experience in software engineering, ideally building large-scale distributed systems or customer-facing applications
A strong technical background with modern frontend and backend development, distributed systems, APIs, and cloud infrastructure
Experience designing, building, and maintaining RESTful APIs, microservices, or event-driven systems
Experience with databases (PostgreSQL, MySQL, NoSQL) and cloud platforms (AWS, GCP, or similar)
Ability to break down complex problems, make pragmatic tradeoffs, and ship iteratively
Strong communication skills and comfort collaborating with cross-functional teams

Job Responsibility

Design, build, and improve the backend and/or full-stack systems that power HTS Assist, internal agent tools, and customer self-serve flows
Develop scalable APIs, microservices, and orchestration logic that support complex post-booking journeys across AI, chat, voice, and web
Partner with product, design, AI, and operations teams to deliver features that streamline customer experiences and enhance agent efficiency
Integrate with external systems, such as telephony, CRM, identity, or booking platforms, to support both internal use cases and partner deployments
Own features end-to-end, from technical design through implementation, testing, deployment, monitoring, and iteration
Contribute to architectural decisions, code reviews, reliability improvements, and ongoing enhancements to engineering best practices
Analyze system performance and user behavior to identify opportunities for automation, optimization, and cost reduction

Fulltime

Senior Software Engineer - Product

Frontier Foundry (F²) is IDC’s bold new innovation engine — a design-led, full-s...

Location

India , Hyderabad

Salary:

Not provided

Microsoft Corporation

Expiration Date

Until further notice

Requirements

Bachelor's Degree in Computer Science or related technical field AND 7+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
Hands-on experience with Nuance voice technologies or similar platforms (e.g., Azure Speech, Dialogflow, Alexa Skills Kit)
Deep understanding of Voice Access systems, accessibility APIs, and assistive technologies
Strong proficiency in full-stack development, especially client-side application engineering and user-facing experiences
Experience with GitHub Copilot, Copilot Studio, AI Foundry, or equivalent vibe coding/generative AI tools
Ability to meet Microsoft, customer and/or government security screening requirements are required for this role
Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter

Job Responsibility

Design, build, and deliver high-quality software components aligned to F² charters: interaction models (inking, stylus, display tech), multimodal innovation (sensor fusion, voice/touch interfaces), or AI agents (context-aware, task-oriented)
Integrate and optimize Nuance Conversational AI technologies (e.g., speech-to-text, text-to-speech, NLU) into multimodal experiences
Enhance Voice Access capabilities across platforms, ensuring accessibility, responsiveness, and seamless user interaction
Work across the stack — from UI to backend — with a bias for impact and iteration
Embrace “vibe coding” using AI-assisted tools like GitHub Copilot, Copilot Studio, AI Foundry, and other generative AI tools to reduce boilerplate and drive intelligent test automation
Collaborate with product, design, and partner teams to shape backlog priorities and deliver intuitive, high-impact experiences
Navigate evolving priorities with ingenuity, turning loosely defined ideas into tangible software outcomes
Contribute to architecture discussions, code reviews, and prototyping efforts
Foster a culture of agility, experimentation, and outcome-driven development

Fulltime

Senior AI Engineer

We are looking for an experienced and exceptional AI / ML Engineer (Voice Agents...

Location

India , Hyderabad

Salary:

Not provided

Workato

Expiration Date

Until further notice

Requirements

Bachelor's degree in Computer Science, or a related field, or equivalent practical experience
5+ years in backend software development using modern programming languages (e.g., Python (strongly preferred!), Golang or Java)
Demonstrated experience building production AI systems including chatbots, virtual assistants, and automated support agents using SLMs, LLMs (commercial, open-source models)
Demonstrated strong foundational understanding and appreciate first principles thinking in ML, NLP (transformer based models)
Expertise in natural language understanding (NLU) and intent classification for customer query interpretation, entity extraction, dialogue state tracking and conversation flow management for building a reliable framework for context engineering
Expertise in tuning streaming ASR and TTS engines, Speech to Speech models for context and domain aware transcriptions and naturalness in voice
Expertise in conversation mining for identifying customer intents, root cause analysis, sentiment, resolution, policy adherence for not just auditing but truly understanding conversations for business outcomes across large enterprise scale
Expertise in working with use case based SLMs for realtime agent coaching and recommendations
Expertise in building knowledge bases and FAQ systems with dynamic content retrieval and self-learning capabilities from support interactions
Experience implementing multi-channel support automation across chat, email, voice, and messaging platforms with consistent context handling

Job Responsibility

Design and implement advanced AI/ML systems with a focus on SLMs, LLMs, AI Agents, and Search architectures
Build conversational AI interfaces that handle multi-turn low latency chat/voice customer interactions, maintain context across sessions, and seamlessly escalate to human agents when necessary
Build production-grade AI pipelines for data processing, model training, fine-tuning, benchmarking (dual-control, fluid model etc.) and serving at scale
Implement feedback loops and continuous learning systems that incorporate customer satisfaction metrics, agent corrections, LLM evaluations, human evaluations and conversation outcomes to improve model performance over time. Reinforce organizational policies based on knowledge bases, conversational data and memory systems
Create AI based analytics dashboards and reporting tools to track automation effectiveness, tracing for identifying bottlenecks, identify common customer pain points, and measure key performance indicators like resolution time, containment rate, and customer satisfaction scores. Quality assurance, management to get actionable insights from customer conversations and create evals for the current generation agents
Lead technical initiatives for AI system integration into existing products and services
Collaborate with data scientists and ML researchers to implement and productionize new AI approaches and models

What we offer

vibrant and dynamic work environment
multitude of benefits they can enjoy inside and outside of their work lives

Senior AI Engineer (Agents)

We are looking for an experienced and exceptional Senior AI Engineer (Agents) to...

Location

Singapore

Salary:

Not provided

Workato

Expiration Date

Until further notice

Requirements

Bachelor's degree in Computer Science, or a related field, or equivalent practical experience
5+ years in backend software development using modern programming languages (e.g., Python (strongly preferred!), Golang or Java)
Demonstrated experience building production AI systems including chatbots, virtual assistants, and automated support agents using LLMs (OpenAI, Anthropic, open-source models)
Expertise in natural language understanding (NLU) and intent classification for customer query interpretation, entity extraction, and conversation flow management
Expertise in building knowledge bases and FAQ systems with dynamic content retrieval and self-learning capabilities from support interactions
Experience implementing multi-channel support automation across chat, email, voice, and messaging platforms with consistent context handling
Deep knowledge of REST API design and integration patterns
Experience working with PostgreSQL and ClickHouse, or similar relational and analytical databases
Strong understanding of software architecture, scalability, security, and system design

Job Responsibility

Design and implement advanced AI/ML systems with a focus on LLMs, AI Agents, and retrieval-augmented generation (RAG) architectures
Build conversational AI interfaces that handle multi-turn customer interactions, maintain context across sessions, and seamlessly escalate to human agents when necessary
Build production-grade AI pipelines for data processing, model training, fine-tuning, and serving at scale
Implement feedback loops and continuous learning systems that incorporate customer satisfaction metrics, agent corrections, and conversation outcomes to improve model performance over time
Create analytics dashboards and reporting tools to track automation effectiveness, identify common customer pain points, and measure key performance indicators like resolution time, containment rate, and customer satisfaction scores
Lead technical initiatives for AI system integration into existing products and services
Collaborate with data scientists and ML researchers to implement and productionize new AI approaches and models

Senior Software Engineer, Backend (Voice Platform)

Cresta

Location:
Canada , Toronto

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
January 16, 2026

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