Backend Engineer - AI Coding Agent
$85 per hourMercor
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: Show email
PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.
Vacancy posted 5 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...SuggestedRemote jobContract workSummer work- ...Our platform combines the best of AI and human intelligence to help contact... ...? We're looking for a Fullstack Engineer to join us at Cresta and help take our AI Agent Builder platform to the next... ...more agents. Lead by example in code: Write clean, well-documented, and...SuggestedFull timeWork at officeLocal areaRemote workWork from homeHome office
- ...Senior Software Engineer — Agentic Coding (AI Training) About The Role What if your software engineering expertise could define how the next generation... ...failure modes, edge cases, and areas where autonomous agents break down Develop and improve evaluation frameworks,...SuggestedHourly payLong term contractContract workFreelanceRemote workFlexible hours
$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...SuggestedInternshipWork at office- ...patient outcomes. As a market leader in AI-driven, data-powered, and privacy-compliant... ...established in Canada. 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:...SuggestedFull timeLive out
- ...enterprise demand, we’re scaling our engineering team to support increasingly... .... We’re hiring a Senior Backend Engineer to help build and... ...external services such as OCR and AI models where appropriate... ...best practices Help improve code quality, testing, and deployment...Full timeWork at office
- ...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 areaRemote workWork from homeHome office
$170k - $200k per year
...Position: Â AI Platform Engineer (Full Stack) Location:Â Hybrid, 3x per week in office (Oakville) Structure : FTE, Permanent... ...Engineer Responsibilities: Build and improve internal AI agent workflows for code generation and feature delivery Design safe and reliable...Long term contractPermanent employmentWork at office$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 office1 day per week$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...Full timeWork at officeLocal areaWorldwideFlexible hours2 days per week1 day per week- ...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 contractFull time
- ...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 jobWork at officeLocal areaWork from homeHome office
$160k - $220k per year
...Secure Every Identity, from AI to Human Identity is the key to unlocking the potential... ...they need to do their jobs. The Staff Backend Engineer Opportunity We're looking for a... ...getting it right really matters. You'll ship code that protects real infrastructure for...Local areaWorldwide$70 - $80 per hour
...Our company is AI and Data is at the forefront of AI innovation,... ...typical day look like?: As an AI Engineer, you will focus on building,... ...will: Develop and deploy agent-based Generative AI applications... ...solution development and ensure code modularity. Operationalize APIs...Contract workWork at office$72k - $138k per year
...Job Type: Permanent Work Model: Hybrid Reference code: 130069 Primary Location: Toronto, ON All Available Locations... ...on the job coaching -- We are looking for a passionate AI Research Engineer to join our team. You will work at the intersection of cutting...Permanent employmentFlexible hours- ...opportunity: Join our Blocks team as a Software Engineer and play a critical role in shaping the... ...Excellence: Apply best practices in coding, system architecture, and performance optimization. If you're passionate about backend engineering, solving complex problems, and...Full timeRemote work
$110k - $140k per year
...intelligent automation, agentic AI, and custom technology... ...consulting expertise with hands-on engineering to bridge the gap between strategy... ...in two-week sprints. As AI agent-based automation grows alongside... ...Handle LLM failure modes in code: output validation, fallback logic...Work at office$110k - $150k per year
...capital markets with innovative, AI-driven technology and expert... ...are looking for an Applied AI Engineer to join the AI Lab team within... ...LLM-powered solutions, designing agents that can reason and act across... ...hands-on by preference. Writing code, building pipelines, running...Full timeInternshipLocal areaRemote workFlexible hours$120k - $150k per year
...growth, with a focus on practical AI adoption, stronger internal... ...is hiring a Senior Full Stack Engineer to build AI-enabled products, workflows... ...end, from the data model and backend services to APIs, orchestration... ...how to work with AI coding tools and generative AI systems...Long term contractFull timeInternshipWork at office3 days per week- ..., flexibly, and collaboratively — without compromising standards — we want to hear from you. We're looking for an exceptional backend engineer and hands-on architect to help us scale and connect millions of devices to wireless networks. The projects and potential impact are...Worldwide
$120k - $150k per year
...world's most reliable on-demand, logistics engine for delivery! We're looking for... .... About the Role We're looking for Backend Engineers to work on both Product and Product... ...backend tech stacks Proficiency in using AI coding tools (e.g., Claude Code, Codex, Cursor)...Full timeWork at officeLocal areaRemote work- ...for you to join us! About the job - AI Engineer Join the Engineering Team, where you’ll... ...implement robust agentic workflows, multi-agent systems, intelligent system behaviors, and... ...critically about problems before committing to a code path. ~ You bring intellectual humility,...Work at officeWorldwide1 day per week
$190k - $220k per year
...You'll embed directly with the cross functional AI team as a dedicated AI engineer. Your job isn't to write code faster with AI. It's to fundamentally redesign how... ..., and then build the solution: sometimes that's an agent, sometimes it's a deterministic internal app, sometimes...Hourly payFlexible hoursShift work$90k per year
...edge cloud platform, coupled with AI-driven analytics tools, unlocks... ...and experienced Software Engineer, AI to perform a key role in our... ...systems, applied machine learning, backend engineering, data pipelines,... ...autonomous and semi-autonomous AI agents that can reason, plan, use...Flexible hours$156k - $214.5k per year
...Faire. We are looking for a Senior Growth Engineer (Frontend or Backend) who thrives at the intersection of... ...clean, secure, tested, and maintainable code that scales to millions of users.... ...matters, including the latest enterprise AI tools, to help you work smarter and get...Work at officeLocal areaRemote workMonday to friday3 days per week$118.2k - $168.2k per year
...Staff Platform Engineer- Materia AI Are you excited about building cloud-native platforms that power Agentic workloads... ...cycles. Deliver AI-Driven Systems: Launch backend services into production that power generative AI agents and orchestration systems. This role requires...Full timeWork at officeLocal areaFlexible hours2 days per week3 days per week- ...customer churn. What you'll do As an engineer on the team, you'll be responsible for... ...where you'll design, build, test, and ship code every day. In this cross-functional role,... ...requirements ~2–12+ years of experience in backend software development ~ Ability to write...Contract workInternship
$108k - $135k per year
...looking for passionate, driven engineers to build systems that empower our... ...tested, readable, maintainable code Unblock, support and... ...work experience ~ Experience in backend software development of large-scale... .../GCP/Azure ~ Experience with AI/ML like Model integration or...Hourly payWork at officeFlexible hours3 days per week- ...Microservices · Angular · AI Role Description:... ...and maintain high-performance backend services using Java (17+),... ...deployments · Participate in code reviews, architecture discussions... ...Skills: Core Backend Engineering 5+ years of hands-on experience...
- ...technology. The Opportunity ShyftLabs is looking for an Associate AI Engineer (New Grad) to join our growing engineering team. This is an... ...engineer who wants to work at the intersection of AI/ML and backend software development. In this role, you’ll help design and...Full time
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Backend Engineer - AI Coding Agent. Be the first to apply!
Related searches
- backend software developer Toronto, ON
- backend developer Toronto, ON
- représentant développement des affaires Toronto, ON
- security agent Toronto, ON
- traffic agent Toronto, ON
- agent des communications Toronto, ON
- agent de liaison Toronto, ON
- signing agent Toronto, ON
- parts representative Toronto, ON
- enrolled agent Toronto, ON