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Added 3 months ago
SC
Senior Environmental or Water Resources Engineer / Ingénieur(e) sénior à intermédiaire en environnement ou en ressources en eau
SRK Consulting
Montreal, Quebec
- Full-time
Senior Environmental or Water Resources Engineer / Ingénieur(e) sénior à intermédiaire en environnement ou en ressources en eau - Montreal, Quebec City, Toronto, Sudbury, Canada
Added 4 months ago
C
Senior Quality Engineer (Python, SQL)
Cognizant
Halifax, Nova Scotia
- $70,000 to $90,000 CAD / year
- Full-time
As a Senior Quality Engineer, you will lead quality assurance initiatives and collaborate with cross-functional technology teams to ensure the delivery of scalable, high-performance…
Added 3 months ago
L
Senior AI Systems Engineer - Agentic Workflow Runtime
Lydia.ai
Toronto, Ontario
- Full-time
We are looking for a senior engineer to help scale the core runtime behind these workflows.
Added 3 months ago
C
Senior Software Engineer
Clutch
Toronto, Ontario
- $160,000 to $200,000 USD / year
- Full-time
Clutch is seeking a Software Engineer (Full-Stack / Backend / Frontend) to help build and scale our technology platform. You will write clean, reliable code, design scalable architectures,…
Added 3 months ago
F
Operations Automation Engineer
Forma.ai
Toronto, Ontario
- $100,000 to $120,000 CAD / year
- Full-time
Forma.ai is looking for an Operations Automation Engineer to build automation, internal tools, and workflow systems that help our Customer Operations and Customer Delivery teams scale with…
Added 2 months ago
HR
Senior Clinical Analyst
Humber River Health
Toronto, ON · Greater Toronto, ON
- Other
Perform and document analytic requirements for analytic solutions to be built by the data engineer/developer, including interactive dashboards in BCA, reports with interactive…
Added 2 months ago
I
Software Engineer I, Toronto Co-op
INSTALILY.AI
Toronto, ON
- $7,000 CAD / month
Build a rapport with the Lead Software Engineer and Head of Product while fostering a culture of continuous learning and improvement
Added 2 months ago
G
Analyste de données / Data Scientist
Genetec
Remote, Canada
- Full-time
- Remote
Maîtrise avancée de Python (Pandas, NumPy, Scikit-learn) et expérience dans l’utilisation de bibliothèques d’apprentissage automatique
Added 2 months ago
Senior Platform Engineer
AutoTrader.ca
Toronto, ON
…What we care about is a faster, smoother day-to-day for every engineer, and AI is the biggest lever we…
Added 2 months ago
HH
Senior Quality Engineer
Hinge Health
Remote, Canada
- $90,400 to $135,600 CAD / year
- Full-time
- Remote
…Health’s computer vision–powered experiences. As a Senior Quality Engineer on the Computer Vision User Experience team, you’ll drive the testing strategy and quality standards that ensure…
Added 1 month ago
Globalization Tech Lead
Okta
Toronto, ON
Okta is looking for a highly skilled Globalization Engineer to be the technical backbone of our global digital operations. You will be responsible for owning, building, and optimizing the…
Added 3 months ago
DI
Field Engineer. AI Solutions. Contract.
Data Intellect
Toronto, Ontario
- Full-time
…AI-powered decision-making. We’re seeking a Field Solutions Engineer to design and deliver scalable solutions for enterprise clients, blending engineering expertise with consultative…
Added 3 months ago
AO
Software Engineer
Agents Only Technologies
Remote, Canada
- Full-time
- Remote
Agents Only Technologies is seeking a Software Engineer to help build, maintain, and enhance the systems that power our global workforce, customer operations, and technology platforms.
Added 1 month ago
Staff Design Verification Engineer, AI HW
Tenstorrent
Toronto, ON
Proficient in Linux environments with Python, or Bash scripting for automate builds, parse logs, manage CI pipelines.
Added 2 months ago
A
Senior Data Engineer
APPLY
Toronto, ON · Vancouver, BC
- Full-time
Proficiency in Python for data processing, automation, and orchestration.
Added 2 months ago
Q
AI/Machine Learning Engineer (Embedded Systems, Inference Efficiency)
Qualcomm
Markham, ON
- Full-time
Added 2 months ago
W
Senior / Staff Research Engineer, Simulation Assets & Content Systems
Waabi
Toronto, ON
- $155,000 to $269,000 USD / year
- Full-time
Strong software engineering fundamentals. You write efficient and maintainable code in Python, as well as in at least one native systems language such as C++ or Rust
Added 1 month ago
HA
Forward Deployed Engineer
Harmony AI
ON
- $100,000 to $110,000 USD / year
- Full-time
Join Harmony AI as a forward-deployed engineer working directly with customers during US nationwide factory deployments - not one city only. Our HQ is Chattanooga, TN. In-person, on-site,…
Added 1 month ago
HA
Full-Stack Software Engineer
Harmony AI
ON
- $100,000 to $110,000 USD / year
- Full-time
Join Harmony AI as a full-stack software engineer working directly with customers during US nationwide factory deployments - not one city only. Our HQ is Chattanooga, TN. In-person,…
Added 3 months ago
TN
Senior Cloud Engineer
The Nationwide Group
Markham, Ontario
- $130,000 to $145,000 CAD / year
- Full-time
The Cloud Engineer role will be responsible for designing, implementing, managing, and maintaining secure, scalable, and highly available cloud infrastructure to support TNG’s digital…
Added 3 months ago
C
Senior Data Engineer
ClickUp
Canada
- Full-time
We're looking for a Staff Data Engineer to own the architecture and technical vision of our data platform. This is a high-leverage, high-autonomy role where you'll set the technical bar for…
Added 3 months ago
C
Formal Verification Engineer - AI - Toronto, Canada
Cognichip
Toronto, Ontario
- Full-time
Solid programming skills (e.g., Python, C++) and the drive to rapidly master new tools and domains.
Added 3 months ago
WI
Traffic Engineer
WSP in Canada
Toronto, Ontario
- Full-time
Programming skills (VBA, Python, C#, etc.) are an asset for developing modelling tools and automation
Added 3 months ago
WI
Traffic Engineer
WSP in Canada
Vaughan, Ontario
- Full-time
Programming skills (VBA, Python, C#, etc.) are an asset for developing modelling tools and automation
Added 3 months ago
WI
Traffic Engineer
WSP in Canada
Markham, Ontario
- Full-time
Programming skills (VBA, Python, C#, etc.) are an asset for developing modelling tools and automation

Lydia.ai

Senior AI Systems Engineer - Agentic Workflow Runtime

Toronto, ON, Canada

Full-time

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Job details

Job type: Full-time
Posting language: English
Posted: Jul 2, 2026

Original job description

Lydia AI - ORCA

Lydia AI is building ORCA, an agentic AI platform that helps businesses research, analyze, and present complex information using AI-powered workflows.

ORCA helps enterprises scale expert-led work by encoding how complex work gets done. Our platform turns source materials, business rules, human judgment, and review processes into repeatable agentic workflows that produce completed work products such as decks, reports, evidence packs, plans, campaigns, and other enterprise deliverables.

The Opportunity

We are looking for a senior engineer to help scale the core runtime behind these workflows.

This is not a prompt engineering role. This is an engineering-heavy role for someone who can design, build, debug, and scale production systems where LLMs, tools, retrieval, workflow state, databases, and human review need to work reliably together.

The Role

As a Senior AI Systems Engineer, you will help build and scale ORCA’s agentic workflow runtime. You will work across backend services, agent orchestration, retrieval, workflow state, persistence, service boundaries, and production reliability.

We are looking for someone roughly 10+ years into their engineering career, with meaningful experience building and scaling production systems.

Key Responsibilities

Build and scale production-grade Python backend services
Improve ORCA’s agent runtime, gateway, connector, and persistence architecture
Design reliable agent workflows using tool calling, function calling, structured outputs, retries, and fallbacks
Build retrieval and source-grounding systems for enterprise source materials
Own PostgreSQL / Supabase schema design, migrations, RLS, query performance, and workflow state persistence
Define clean API and service boundaries across runtime, connectors, frontend surfaces, and downstream tools
Instrument agent runs with logs, traces, evals, and regression tests
Improve reliability, latency, cost, debuggability, and production recovery
Harden tenant isolation, permission boundaries, auditability, and enterprise security
Mentor engineers and raise the technical bar across the platform

What We’re Looking For

You Should Have Deep Experience With

Production backend engineering, ideally in Python, including async execution, task lifecycle, retries, timeouts, cancellation, background workers, and production debugging
Agentic AI systems, including LLM tool use, function calling, prompt routing, multi-turn state, context handling, retries, fallbacks, and multi-step workflow execution
Retrieval and source grounding, including RAG, embeddings, semantic search, source search, context assembly, document grounding, and retrieval quality
PostgreSQL and data modeling, including schema design, migrations, indexing, query performance, transaction boundaries, and debugging query plans
API and service architecture, including service contracts, versioning, idempotency, failure handling, and clean boundaries between systems
Evaluation and observability, including traces, logs, eval sets, golden cases, regression testing, and root-cause analysis for agent failures
Enterprise security, including tenant isolation, permission boundaries, audit logs, least-privilege access, and data leakage prevention
Operational debugging, including the ability to reason from logs, database state, service behavior, and imperfect production environments

ORCA currently includes some non-standard runtime components, including macOS / launchd-managed services, so you should be willing to operate outside standard Linux-only assumptions when needed.

Strong-to-Have Experience

LangGraph, LangChain, CrewAI, MCP, or similar orchestration frameworks
Anthropic, OpenAI, or other tool-use / function-calling model APIs
Multi-model routing
Telegram Bot API or chat-based workflow interfaces
Connector server design
Document ingestion, structured extraction, or source-pack processing
Supabase RLS at scale
Multi-tenant SaaS authorization
CI/CD, deployment, monitoring, and infrastructure hygiene
Frontend awareness, especially around surfacing workflow state and agent review states to users

You’ll Be a Strong Fit If You

Have scaled production systems before, not just built prototypes
Are comfortable owning architecture and implementation
Can debug complex failures across services, models, tools, and databases
Think carefully about workflow state, permissions, and data boundaries
Understand that agentic systems require engineering discipline, not just better prompts
Can help a fast-moving product mature into a reliable enterprise platform

Ideal Background

We expect the right candidate to be approximately 10+ years into their engineering career, with experience in backend systems, platform engineering, infrastructure, AI systems, or enterprise SaaS.

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More about this job

Responsibilities

As a Senior AI Systems Engineer, you will help build and scale ORCA’s agentic workflow runtime. You will work across backend services, agent orchestration, retrieval, workflow state, persistence, service boundaries, and production reliability.

Requirements

The ideal candidate should have deep experience with production backend engineering, particularly in Python, and a strong understanding of agentic AI systems. They should also possess skills in PostgreSQL, API architecture, and enterprise security.

Skills

Python
Production Engineering
Agentic AI Systems
Retrieval
PostgreSQL
API Architecture
Observability
Enterprise Security
Operational Debugging
Async Execution
Task Lifecycle
Function Calling
Semantic Search
Data Modeling
CI/CD
Multi-Tenant SaaS

Visa sponsorship

Not detected in the job text

Keywords

AI
Agentic Workflow
Backend Services
Production Systems
Python
PostgreSQL
Service Architecture
Observability
Enterprise Security
Debugging
Async Execution
Task Lifecycle
Function Calling
Semantic Search
Data Modeling
CI/CD
Multi-Tenant SaaS
Agent Orchestration
Retrieval
Workflow State
Persistence
Service Boundaries
Production Reliability
Logs
Traces
Regression Testing
Tenant Isolation
Permission Boundaries
Audit Logs
Data Leakage Prevention

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