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

Backend Engineer - AI Coding Agent

$85 per hour

Mercor

Toronto, ON
  • Remote job

About the job

Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey .

Position: Backend Engineer (Coding Agent Experience)

Type: Contract

Compensation: $85/hour

Location: Remote

Role Responsibilities

  • Use frontier AI coding agents to complete and evaluate complex engineering tasks.
  • Review model-generated code for correctness, quality, maintainability, and performance.
  • Identify bugs, edge cases, and failure modes in model outputs.
  • Compare outputs from multiple frontier models and assess their strengths and weaknesses.
  • Apply professional engineering judgment to realistic backend engineering scenarios.
  • Work independently and asynchronously to meet deadlines while improving AI model performance .

Qualifications

Must-Have

  • 2+ years of professional backend engineering experience.
  • Experience building APIs , distributed systems, microservices, backend platforms, or databases.
  • Regular use of AI coding agents such as Cursor, Claude Code, Codex, Windsurf, Gemini CLI, or similar tools.
  • Ability to evaluate model-generated code and identify bugs, edge cases, and architectural tradeoffs.

Preferred

  • Experience working on large-scale production systems.

Compensation & Legal

  • $400 per accepted task .
  • Typical tasks take approximately 1–3 hours after ramp-up.
  • No fixed task limits.
  • Compensation is tied to accepted work.

Application Process (Takes 20–30 mins to complete)

  • Upload resume
  • AI interview based on your resume
  • Submit form

Resources & Support

  • For details about the interview process and platform information, please check:
  • For any help or support, reach out to:

PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.

Vacancy posted 26 days ago
Similar jobs that could be interesting for youBased on the Backend Engineer - AI Coding Agent in Toronto, ON vacancy
  • $85 per hour

     ...Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors...  ...Larry Summers , and Jack Dorsey . Position: Security Engineer (Coding Agent Experience) Type: Contract Compensation: $85... 
    Suggested
    Remote job
    Contract work
    Summer work

    Mercor

    Toronto, ON
    22 days ago
  • $85 per hour

     ...Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors...  ...Larry Summers , and Jack Dorsey . Position: Frontend Engineer (Coding Agent Experience) Type: Contract Compensation: $85... 
    Suggested
    Remote job
    Contract work
    Summer work

    Mercor

    Toronto, ON
    26 days ago
  • $100k - $115k per year

     ...We are seeking a skilled Conversational AI Engineer to be a core contributor in designing building...  ...conversational flows within the chosen Agent platform (e.g. Dialogflow CX Playbooks)...  ...various internal and external APIs and backend services (CRMs databases etc.). IVR &... 
    Suggested
    Permanent employment
    Full time
    Work at office
    Local area

    INFOYA

    Toronto, ON
    7 days ago
  • $150k - $200k per year

     ...! We are a close-knit group of engineers of different stripes - developers...  ...implement solutions & write beautiful code, working with various team...  ...design and delivery of scalable backend platforms and distributed systems, leveraging AI-assisted and agentic engineering... 
    Suggested
    Work at office
    Remote work
    Work from home
    Flexible hours
    2 days per week
    3 days per week

    HelloFresh

    Toronto, ON
    2 hours ago
  • $30 - $50 per hour

     ...competitive advantage. Cresta’s unified AI platform combines conversational AI agents, real-time human agent augmentation...  ...reliable.  As a Forward Deployed Engineering Intern on the AI Agent team, you’ll...  ...field. Experience writing code in  Python (or another general-purpose... 
    Suggested
    Internship
    Work at office

    Cresta

    Toronto, ON
    22 days ago
  • $143k - $200k per year

     ...activated content generation and AI decisioning. The world’s most...  ...owns the core recommendations engine that powers billions of AI-driven...  ...consumer brands. As a Senior Backend Developer, you will lead the evolution...  ...around system design, code quality, testing, observability... 

    Movable Ink

    Toronto, ON
    2 hours ago
  •  ...Purpose of the Job We are looking for a Staff AI Platform & Agent Runtime Engineer to build the foundation for enterprise-scale AI and agent execution at EQ Bank. In this role, you will architect and operate the platform that powers our next generation of AI agents from... 
    Full time

    eqbank

    Toronto, ON
    11 days ago
  • $85k - $105k per year

     ...Xello is looking for a Backend Engineer This role is a remote role, looking for candidates within Canada only. __ Xello is looking for...  ...based programming, with a proven track record of writing testable code.  Working as part of Xello’s development team in an agile... 
    Full time
    Remote work
    Flexible hours

    Xello

    Toronto, ON
    4 days ago
  •  ...platform that makes this real: a unified AI agent that sells, supports, and re-engages customers...  ...platforms and tooling used by AI and engineering teams Reduce manual processes and...  ...tools. Tech Stack & Experience Strong backend experience (Python preferred) Experience... 
    Long term contract
    Remplacement
    Full time
    Internship
    Work at office
    Work from home
    Shift work

    gorgias

    Toronto, ON
    1 day ago
  •  ...work of your career. About the team AI and stablecoins have brought upon a...  .... What you’ll do We’re looking for Backend Engineers to design, build, and maintain scalable bank...  ...in terms of business impact, not lines of code Ability to thrive with a high level of... 
    Long term contract
    Temporary work

    Stripe

    Toronto, ON
    1 day ago
  • $80k - $89k per year

     ...business. From design, artwork & photography to engineering, systems & data, we support all of Lush’s...  ...needs. The Role As an Intermediate Backend Engineer, you will contribute to backend...  ...: Write clear, maintainable code that will scale across projects and distributed... 
    Permanent employment
    Full time
    Work at office
    Local area
    Worldwide
    Flexible hours
    2 days per week
    1 day per week

    Lush Handmade Cosmetics

    Toronto, ON
    4 days ago
  •  ...Boot Developer with robust SQL expertise and experience leveraging AI tools for code generation to join our dynamic engineering team. The ideal candidate will design, develop, and maintain scalable backend systems, optimize database performance, and harness AI-driven tools... 
    Contract work

    Astra North Infoteck Inc.

    Toronto, ON
    11 days ago
  •  ...patient outcomes. As a market leader in AI-driven, data-powered, and privacy-compliant...  ...critical to this role.   As a Senior Backend Engineer , you will have a hand in architecting...  ...colleagues, you will work to deliver high-quality code on time.   Our engineering culture:... 
    Full time
    Live out
    Visa sponsorship

    nimblerx

    Toronto, ON
    20 days ago
  • $130k - $165k per year

     ...Founded in 2004, NetBrain is the leader in no-code network automation. Its ground-breaking Next-Gen platform provides...  .... What We Need We’re looking for a Senior AI Engineer to design and build production-grade agent and RAG systems that power intelligent, reliable... 
    Work at office
    1 day per week

    NetBrain

    Toronto, ON
    1 day ago
  •  ...platform combines the best of AI and human intelligence to help...  ...the role: At Cresta, the AI Agent team is on a mission to create...  ...looking for a Forward Deployed Engineer (FDE) who is passionate about building...  ...to write clean, efficient code. AI/ML Knowledge: Familiarity... 
    Remote job
    Work at office
    Local area
    Work from home
    Home office

    Cresta

    Toronto, ON
    more than 2 months ago
  • $118k - $152k per year

     ...We're looking for a Staff Java Engineer who combines deep technical...  ...and deliver resilient, scalable backend solutions using modern Java technologies...  .... Remain hands-on with coding, architecture, technical design...  ...the practical adoption of AI-assisted engineering capabilities... 
    Long term contract
    Internship
    Immediate start

    Capco

    Toronto, ON
    11 days ago
  • $100k - $140k per year

     ...About the Role We are seeking AI Developer /Prompt Engineer to contribute to major projects.  The...  ...applications, predictive models, and intelligent agents Build and integrate AI services...  ...using GitHub Copilot and Claude Code Design APIs, microservices, and event... 
    Permanent employment
    Full time
    Remote work
    Flexible hours

    Levio

    Toronto, ON
    2 hours ago
  •  ...automated optimizations per second, the AI-powered StackAdapt Marketing Platform seamlessly...  ...efficient and memory optimized code We'll be reaching out to candidates that...  ...have: ~2+ years of experience as a Backend Software Engineer. ~ Very strong problem solving skills... 
    Local area
    Remote work
    Work from home
    Home office

    StackAdapt

    Toronto, ON
    26 days ago
  • $135k - $210k per year

     ...Guidepoint seeks an experienced Data/AI Engineer as an integral member of the Toronto-based...  ...language model (LLM) applications and research agents, while ensuring the integration of...  ...build, and operate scalable, low-latency backend services and APIs that serve Generative AI... 
    Full time
    Worldwide

    Guidepoint

    Toronto, ON
    2 hours ago
  • $62.87k - $147.5k per year

     ...At Capgemini Engineering, the world leader in engineering services, we...  ...We are looking for senior backend engineers for a critical project...  ...working with GenAI tools, Claude Code. Exposure to Python, NodeJS...  ...market leading capabilities in AI, generative AI, cloud and data... 
    Permanent employment
    Full time
    Manual labor
    Local area
    Remote work

    Capgemini

    Toronto, ON
    11 days ago
  • $62.87k - $147.5k per year

     ...At Capgemini Engineering, the world leader in engineering services, we bring together a global...  ...opportunities. Develop best practices for data coding to ensure system-wide consistency....  ...fueled by its market leading capabilities in AI, generative AI, cloud and data, combined... 
    Permanent employment
    Full time
    Local area
    Remote work

    Capgemini

    Toronto, ON
    1 day ago
  • $120k - $150k per year

     ...reliable, on-demand logistics engine for last-mile delivery! We're bringing...  .... Leverage the latest AI-assisted development tools and...  ...have 2+ years of experience in backend, infrastructure, or platform engineering...  ...have proficiency in using AI coding tools (e.g., Claude Code, Codex... 
    Long term contract
    Full time
    Contract work
    Local area

    DoorDash Canada

    Toronto, ON
    4 days ago
  •  ...features beats endless meetings, and where every engineer has a direct line to user impact. If you thrive on ownership and want your code to improve someone's ROI tomorrow, you'll fit...  ...in.   The Role We're looking for an AI-native engineer who focuses on building... 
    Long term contract
    Full time

    Betstamp

    Toronto, ON
    21 days ago
  • We are looking for an experienced AI Engineer to design and deliver scalable Gen AI solutions. The...  ...such as LLM pipelines, RAG, and agent-based systems. This role is for subcontractors...  ...solutions, with a focus on clean, maintainable code using Python, React, and AWS tools.... 
    For subcontractor

    Luxoft

    Toronto, ON
    1 day ago
  • $156k - $214.5k per year

     ...community, come join ours. About this role: Our Brand engineering team owns the code that our Brands use to manage their business on Faire. This...  ...with us to: Define clear service boundaries Build out AI enablement for common tasks on the team Optimize the performance... 
    Work at office
    Local area
    Remote work
    Monday to friday
    3 days per week

    Faire

    Toronto, ON
    8 days ago
  •  ...is the leading conversational AI platform empowering every brand...  ...and Hunter Douglas to deploy AI agents that power personalized, deeply...  ...About the Role As a Customer Engineer, Agent Builder , you will be...  ...foundation: comfortable writing code, working with APIs, and... 
    Full time
    Manual labor
    Work at office
    Local area

    decagon

    Toronto, ON
    1 day ago
  •  ...Big Viking Games is hiring a Head of Engineering & AI to drive AI-first transformation across our...  ...roadmap for AI/ML capabilities, game and backend architecture, engineering standards, and...  ..., observability, and infrastructure-as-code for live games Collaborate with data... 
    Long term contract
    Full time
    Shift work

    Big Viking Games

    Toronto, ON
    6 days ago
  •  ...Senior AI Engineer Location: Ontario (5 Days Onsite) Duration: Long-term Contract...  ...customer service solutions including AI Agents virtual assistants voicebots and conversational...  ...applications Infrastructure as Code (IaC) CI/CD and DevOps practices Development... 
    Long term contract
    Full time

    Upstaff

    Toronto, ON
    7 days ago
  •  ...command center for creative strategists : an AI-driven analytics and intelligence platform...  ...get there! About the Senior Software Engineer role As a Senior Software Engineer, you...  ...do full-stack development with a focus on backend: anything from building features to... 
    Permanent employment
    Full time
    Summer work
    Internship
    Work at office
    Remote work
    Work from home
    Shift work

    Motion

    Toronto, ON
    6 days ago
  •  ...better, more human customer experiences with AI. We are primarily an in-person company...  ...Design and deliver production-grade AI agents : You'll build and ship highly performant...  ...These are some examples of projects that engineers on our team have worked on recently: Design... 
    Full time
    Flexible hours

    sierra

    Toronto, ON
    1 day ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Backend Engineer - AI Coding Agent. Be the first to apply!