Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior/Staff Backend Engineer

$160k - $240k per year
Full-time

Aida Recruitment

Location: Remote — USA, Canada, or London, UK
Engagement: Full-time / Long-term project
Compensation: $160K–$240K annually + meaningful equity
Seniority: Senior / Staff

About the Project

We are looking for a Senior/Staff Software Engineer to join a rapidly growing technology company building infrastructure for AI-powered voice agents .

The product helps companies test and improve their AI voice agents at scale. The platform can automatically run thousands of simulated calls using different accents, tones, speaking styles, personalities, and scenarios, then analyze the conversations and identify bugs, failures, and unexpected behavior.

The company is experiencing rapid growth and is now scaling its infrastructure from approximately 30K concurrent voice calls toward 100K–200K+ concurrent calls .

A major upcoming initiative is the development of a purpose-built database for conversational AI , designed to efficiently store, process, query, and retrieve massive volumes of voice-agent interaction data.

We're looking for someone who has genuinely built data infrastructure at scale — ideally as a primary author, architect, or technical owner of a database, queue, storage system, streaming platform, or other large-scale data system.

What You'll Do

  • Design and build a purpose-built database for conversational AI data , including storage architecture, indexing, ingestion, query paths, and retrieval at scale.
  • Scale simulation infrastructure from approximately 30K toward 200K+ concurrent voice calls .
  • Architect systems for high availability, graceful degradation, and 99.99% uptime .
  • Own critical backend services built primarily with TypeScript/Node.js and Python .
  • Work with technologies across real-time voice and AI infrastructure, including LiveKit, Temporal, STT/TTS systems, and LLM tooling .
  • Build reliable pipelines for telephony events, recordings, transcripts, evaluations, and call outcomes.
  • Improve distributed tracing and production observability using technologies such as OpenTelemetry and SigNoz .
  • Diagnose and eliminate performance bottlenecks across high-throughput distributed systems.
  • Make architectural decisions around scalability, reliability, latency, storage, and infrastructure costs.
  • Ship quickly, measure production behavior, and continuously iterate. The engineering team currently deploys to production multiple times per day.

What We're Looking For

  • 5+ years of software engineering experience , with strong backend or infrastructure expertise.
  • Proven experience building a database, queue, storage engine, streaming system, distributed data platform, or comparable large-scale infrastructure .
  • Ideally, you were a primary author, architect, or technical owner rather than simply a user or contributor.
  • Strong knowledge of distributed systems , including partitioning, replication, concurrency, consistency, failure recovery, backpressure, and graceful degradation.
  • Experience scaling infrastructure under significant real-world production load .
  • Ability to discuss previous systems quantitatively — for example, requests/events per second, concurrency, p95/p99 latency, data volumes, availability, cluster size, or cost improvements.
  • Strong backend development experience. TypeScript/Node.js and Python are used on the project, but engineers from other strong infrastructure backgrounds are welcome.
  • Strong understanding of production monitoring, observability, and distributed tracing.
  • High level of ownership and ability to operate effectively in a fast-moving environment.
  • AI-native mindset: actively using modern AI tools to accelerate engineering, debugging, research, and development.
  • Strong bias to action — comfortable building the smallest working solution, shipping it, learning from production, and iterating.

Nice to Have

  • Database internals / storage engine development
  • Distributed databases
  • Kafka, Pulsar, Redpanda, or similar messaging infrastructure
  • Streaming or high-throughput ingestion systems
  • Query engines and indexing
  • Observability infrastructure
  • OpenTelemetry / SigNoz
  • WebRTC / LiveKit
  • Telephony, SIP, or RTP
  • Voice or audio processing
  • STT/TTS infrastructure
  • LLM infrastructure
  • Experience at a database, data infrastructure, observability, or developer infrastructure company

Recruitment Process

1. Short Screening Interview
A brief AI interview (recommended for faster candidate submission)  or conversation with a recruitment agency representative to discuss the candidate's background, relevant experience, and fit for the role.

2. Candidate Submission
The candidate's profile is submitted to the client. We'll notify the candidate once the hiring team confirms whether they would like to proceed.

3. Intro Call — 15 minutes
A brief conversation with a team member to assess culture fit, interest in systems/infrastructure work, ownership mindset, and alignment with a fast-paced engineering environment.

4. Coding Interview — 30 minutes
An open-book live coding session. Candidates are encouraged to use their preferred AI tools while building something in real time. The focus is on coding fluency, speed of prototyping, problem-solving, and an AI-native engineering workflow.

5. Systems Design Interview #1 — 60 minutes
Focused on distributed systems, database architecture, and scalability. The discussion may cover technologies and concepts related to PostgreSQL, Redis, Kafka, and high-scale real-time infrastructure.

6. Systems Design Interview #2 — 60 minutes
A second technical design interview with another engineer, covering a different problem area such as observability, voice simulation infrastructure, data pipelines, or large-scale distributed systems.

7. Paid Work Trial — 2–3 days
A paid trial based on a real engineering problem. This gives both sides an opportunity to evaluate delivery speed, technical decision-making, communication, collaboration, and overall fit.

8. Offer & Hiring
Successful candidates receive an offer following the work trial.

Vacancy posted 12 hours ago
Similar jobs that could be interesting for youBased on the Senior/Staff Backend Engineer in Ontario vacancy
  •  .... Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build...  ...position Location-based hybrid policy: Currently, we expect all staff to be in one of our offices at least 25% of the time. However,... 
    Senior
    Long term contract
    Work at office
    Worldwide
    Visa sponsorship
    Flexible hours

    Anthropic

    Ontario
    16 days ago
  • $19.5 per hour

     ...Woolwich Township Job Posting Date: July 14, 2026 Position: BCC Staff – Customer Service (Part-Time) Wage Rate/Grade: $17.60 - $19.50 per hour Discover the charms of the Township of Woolwich, a growing community with a bright, well-managed and well-planned future... 
    Suggested
    Hourly pay
    Full time
    Part time
    Monday to friday

    Careers And Volunteering

    Ontario
    12 hours ago
  • $110k - $130k per year

     ...reducing the time to process and access specialist referrals.  Who we need Reporting to the Senior Director, Cloud Operations and Security, we are looking for a DevOps Engineer to join our cloud engineering and security-focused team to help design, build, and operate... 
    Senior
    Full time
    Work at office
    Work from home
    Flexible hours
    Shift work
    Rotating shift

    Oceanmd

    Ontario
    12 hours ago
  • $110k - $160k per year

     ...Senior Geotechnical Engineer – Tailings Toronto or Sudbury, ON KCB is a multidisciplinary engineering, geoscience, and environmental consulting...  ...Mentor and provide technical guidance to junior engineers and staff Develop and maintain strong client relationships... 
    Senior
    Long term contract
    Work at office
    Local area
    Flexible hours

    Klohn Crippen Berger

    Ontario
    15 days ago
  • $80k - $95k per year

     ...acquisitions for continuous improvement opportunities Conduct Engineering Feasibility Studies (EFSs) to determine the feasibility of implementing...  ...team. Worker Type: Regular / Permanent Group: Magna Mechatronics Mirrors & Lighting Required Experience: Senior IC... 
    Senior
    Permanent employment
    Full time
    Local area
    Immediate start

    Magna International

    Ontario
    10 days ago
  •  ...flexible approach to where we work. Overview Instacarts Detection Engineering team sits at the core of our Security organization, building and...  ...environment spanning endpoint, cloud, container, and SaaS. As a Senior Detection Engineer II, you'll be a technical anchor on the team:... 
    Senior
    Full time
    Work at office
    Work from home
    Flexible hours
    Shift work

    Instacart

    Ontario
    18 days ago
  •  ...more about our flexible approach to where we work. Overview Our backend systems power the clients used by millions of customers every...  ...tight integration with the largest retailers in the US and Canada. Engineering at Instacart provides the opportunity to work on challenging... 
    Senior
    Internship
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  •  ...quality, marketplace efficiency, operational reliability, and compliance. We are looking for a Senior Manager, Software Engineering to lead a team of 10–12 engineers across mobile, backend, vendor-integrated systems, and engineering foundations. This leader will shape the team'... 
    Senior
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  •  ...we work. Overview About the Role We are currently seeking a Senior Software Engineer to join our Agentic Analytics Platform team — the team responsible...  ...— you've shipped real systems, not just prototypes - Strong backend engineering skills in Python, with experience building... 
    Senior
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  •  ...flexible approach to where we work. Overview As a machine learning engineer in the Economics team, you will build state-of-the-art systems...  ...Learning Engineer II, Economist (fresh PhD graduate) or a Senior Machine Learning Engineer I, Economist (post-PhD industry experience... 
    Senior
    Long term contract
    Internship
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    15 days ago
  •  ...in the choices they make for themselves and their families. As a Staff Researcher on the Consumer team, you will shape the foundational...  ...closely with product, design, data science, marketing, and engineering to build products grounded in deep human insight. This is a high... 
    Internship
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    23 days ago
  •  ...day-to-day work and how customers receive the quality orders they expect — and we're just getting started. We are looking for a Senior Engineering Manager to lead the Enterprise Fulfillment engineering team. In this role, you will drive the stability, scalability, and extensibility... 
    Senior
    Long term contract
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    14 days ago
  •  ...Job Title: Senior Product Manager (Remote) Company: TOOLBX Location: Canada (remote) Website: Company Summary TOOLBX...  ...Development: Collaborate with cross-functional teams, including engineering, design, and operations, to define and prioritize features and... 
    Senior
    Remote job
    Permanent employment
    Full time
    For contractors

    Toolbx US Inc.

    Ontario
    12 hours ago
  •  ...Marketing Platform Tooling team builds and maintains the core backend systems that power all of Instacart's marketing capabilities...  ..., and platform Efficiency and Quality. We are looking for a Senior Software Engineer to join this team in Toronto as a dedicated backend owner.... 
    Senior
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  • $55 per hour

     ...6 and Sun 9-6p We are an equal opportunity employer. We are committed to deliver accessibility and equality to all job applicants, staff and our customers. Accommodation is available upon request for applicants with disabilities in the recruitment and assessment process... 
    Hourly pay
    Full time
    Relocation
    Relocation package
    Monday to friday

    Neighbourly Pharmacy

    Ontario
    9 days ago
  •  ...conversion, retention, and long-term customer value. We’re hiring for a Staff Experience Designer to join the Core Experience team and lead...  ..., highly collaborative role partnering closely with Product, Engineering, Marketing, Brand, Data Science, and Research to drive... 
    Long term contract
    Work at office
    Work from home
    Flexible hours
    Shift work

    Instacart

    Ontario
    a month ago
  • \ \\\\ Welcome to Yoush Consulting. Are you an independent IT Consultant or wish to become one? \\\ \ \ \ \ \\ Are you looking to partner with an organization that presents you with consulting opportunities and supports you as a partner? \\\ \ \\\ \\\ We...
    Senior
    Full time

    Yoush Consulting

    Ontario
    12 hours ago
  •  ...flexible approach to where we work. Overview Are you ready to take your development skills to the next level? We’re looking for a Senior Software Engineer to join our Ads team. You’ll play a critical role in the evolution of our Ads suite and help build world-class reporting... 
    Senior
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  • $124.74k - $131.69k per year

     ...We're looking for a highly motivated Senior Process Engineer to take on an important role in our dynamic and dedicated Process Development team. Reporting to the Head of Process Development, you will work on developing an aseptic manufacturing workflow for our bioprinted... 
    Senior
    Contract work
    Local area

    Aspect Biosystems

    Ontario
    20 days ago
  •  ...AMBITIOUS VISION with OPERATIONAL EXCELLENCE  At the heart of great partnerships, we’ll always find EMPATHY WHAT IS YOUR ROLE As a Senior Marketing Multimedia Specialist, you will function as a high-impact, senior creative contributor responsible for elevating Boldr’s... 
    Senior
    Full time
    Shift work

    Boldr

    Ontario
    12 hours ago
  •  ...management, and their associated platform foundations. We are hiring a Senior Engineer II (L6) to co-own the technical roadmap, modernize our data...  ...and management. - Ads Taxonomy: lead intake automation (UI + backend) and release workflow improvements to reduce manual effort and... 
    Senior
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  •  ...Productivity team builds AI-powered platforms and tools that help our engineers and operators move faster, reduce toil, and deliver higher-...  ...for customers, shoppers, retailers, and brand partners. As a Senior Software Engineer on this team, you will design, build, and operate... 
    Senior
    Work at office
    Remote work
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  • $110k - $160k per year

     ...what's expected before you move forward. Who You Are: A  Senior Guidewire Developer  with certification in one or more...  ...our Guidewire practice. We welcome applications from Guidewire engineers across a range of experience levels. Compensation typically ranges... 
    Senior
    Full time
    Remote work

    Norima Consulting

    Ontario
    10 days ago
  •  ...events. Learn more about our flexible approach to where we work. Overview About the Role - You will be a key member of the Security Engineering team that is tasked with researching, developing, and conducting offensive security techniques for a suite of Instacart products.... 
    Senior
    Long term contract
    Permanent employment
    Work at office
    Remote work
    Work from home
    Flexible hours

    Instacart

    Ontario
    a month ago
  • $114.77k - $139.5k per year

    We’re looking for a Project Engineer to join Clarington’s Planning & Infrastructure Services...  ...projects as assigned. Directing design staff and managing third party multi-discipline...  ...to external agencies. Negotiating at the senior level with agencies, developers, consultants... 
    Senior
    Contract work
    For contractors
    Work at office
    Flexible hours
    Afternoon shift

    Municipality of Clarington

    Ontario
    21 hours ago
  •  ...observations, developing sophisticated models, and integrating those outputs into live products at scale. We are looking for a Senior Machine Learning Engineer to help build the next generation of platforms for understanding, observing, and predicting inventory levels and in-store... 
    Senior
    Work at office
    Local area
    Work from home
    Flexible hours

    Instacart

    Ontario
    22 days ago
  •  ...Enterprise AI Solutions for Grocers - Instacart Acquires Arpalus to Advance Real-Time Shelf Intelligence We're looking for a Senior Android Engineer to help us build the next generation of Android-native applications that power our store view and Connected Stores programs.... 
    Senior
    Long term contract
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    21 days ago
  •  ...growth levers. Operating at the intersection of Marketing, Product, and Engineering, we own the platforms behind campaign feeds, audience targeting, event pipelines, and QA automation. We're seeking a Senior Software Engineer to provide technical leadership for the Paid... 
    Senior
    Long term contract
    Temporary work
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    23 days ago
  •  ...at their world, says “it doesn’t have to be this way”, and they do something about it.   The Role:  Recruitment Manager - Seasonal Staff The Recruitment Manager – Seasonal Staff is responsible for leading the full-cycle recruitment and selection of exceptional seasonal... 
    Full time
    Summer work
    Seasonal work
    Shift work

    Muskoka Woods

    Ontario
    a month ago
  • $165k - $183k per year

     ...events. Learn more about our flexible approach to where we work. Overview About the Role  We are currently seeking a Senior Software Engineer to join our Self-Serve team.  The role will be focused within the Experimentation Platform side, where you will be... 
    Senior
    Remote job
    Permanent employment
    Work at office
    Work from home
    Flexible hours

    Instacart

    Ontario
    more than 2 months ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior/Staff Backend Engineer. Be the first to apply!