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Added 13 mins ago
CI
Maintenance Worker III (2026-1078)
Carewest Innovative Healthcare
Calgary, AB
- Full-time
…repairing and maintaining complex mechanical equipment and systems such as washers, dryers, dishwashers, and non-biomedical equipment; monitoring, controlling and repairing boilers and…
Added 13 mins ago
EV
Senior Engineer, Maintenance
Elk Valley Resources
Elkford, BC
- $123,000 to $145,000 CAD / year
Reporting to the Senior Supervisor, Engineer the Senior Engineer, Maintenance is responsible
Added 13 mins ago
T
Senior Java Developer, TD Securities
TD
Toronto, ON
- Full-time
6+ years of experience as a software engineer working on large scale development projects
Added 13 mins ago
C
Security Engineer, Logging Platform
Clio
Toronto, ON · Vancouver, BC · Calgary, AB
- Full-time
We are currently seeking an Infrastructure Security Engineer to join our rapidly growing Security team. This role is for someone passionate about building proactive security solutions,…
Added 13 mins ago
N
NPI & Trials IP Engineer
Nokia
Ottawa, ON
- Full-time
…skilled NPI (New Product Introduction Specialis) & Trials IP Engineer to join our team and help us drive innovation in the exciting world of telecommunications. You'll be at the forefront…
Added 27 mins ago
Q
Oracle EDQ Platform Engineer
Querentia
Canada
- Contract
We are looking for an experienced Oracle EDQ Platform Engineer to support the migration of Oracle Enterprise Data Quality (EDQ) from on-premises environments to Microsoft Azure.
Added 27 mins ago
EV
Senior Engineer, Maintenance
Elk Valley Resources
Elkford, BC
- $123,000 to $145,000 CAD / year
- Full-time
Reporting to the Senior Supervisor, Engineer the Senior Engineer, Maintenance is responsible
Added 27 mins ago
SS
Senior Substation Engineer
Suna Solutions
Montreal, QC
- $135,000 to $155,000 CAD / year
- Full-time
We are seeking an experienced Senior Substation Engineer to lead the technical engineering and coordination of utility-scale renewable energy projects across North America. This role…
Added 27 mins ago
AS
Electrical Engineer
Abacus Service Corporation
Markham, ON
- $70 to $83 CAD / hour
- Contract
The Electrical Engineer designs, develops, and tests electrical systems and components to ensure functionality and efficiency.
Added 28 mins ago
3
EHS Engineer
3M
London, ON · Milton, ON · CA, Ontario, London
- Full-time
…collaborate with other curious, creative 3Mers. 3M is seeking a EHS…
Added 28 mins ago
M
Associate Applied AI Engineer – GenAI Systems
Manulife
Toronto, ON
- Full-time
Engineer features from structured and unstructured data and help ensure solutions remain robust as data evolves.
Added 28 mins ago
IF
Senior Data Developer
Intact FC
Montreal, QC
- Full-time
We are looking for a Senior Data Developer (Engineer) to help establish the data foundation for Contact Distributor, Intact’s new platform for broker and distributor master data. The…
Added 28 mins ago
RW
Project Engineer
Resolute Workforce Solutions
ON · Richmond Hill, Ontario
- Full-time
We are looking for a highly motivated and energetic professional to join our team as a Project Engineer. This role will oversee project execution and provide engineering and CQV support for…
Added 42 mins ago
AI Engineer
Bell
Toronto, ON
We are looking for a hands-on AI Engineer (CP2) to design, build, and deploy the next generation of AI-driven workflows and autonomous systems at Bell.
Added 42 mins ago
NG
Desktop Support Engineer (Level 2)
NSC Global
Brantford, ON
- Other
NSC Global is currently looking for a Desktop Support Engineer to join our growing company.
Added 42 mins ago
S
Measurement Specialist
SECURE
Calgary, AB
- Other
This role combines technical analysis, systems and data management, field support, and cross-functional collaboration. While much of the work involves reviewing data, documentation,…
Added 42 mins ago
Software Development Engineer, Route 53 Domains, Route 53 Domains
Amazon
Vancouver, BC
- 4+ years of non-internship design or architecture (design patterns, reliability and scaling) of new and existing systems experience
Added 42 mins ago
EG
Senior Electrical Engineer
Egis Group
Toronto, ON
- $120,000 to $150,000 CAD / year
- Full-time
Senior Electrical Engineer is a senior-level engineering role based in Toronto, Ontario, Canada, supporting the delivery of complex electrical infrastructure across industrial and…
Added 56 mins ago
AI
AI Security Engineer
Avanciers Inc.
Toronto, ON
- $100,000 to $110,000 CAD / year
- Full-time
Avanciers is a premier IT Staffing/Consulting organization and we are currently recruiting for a contract role for one of our premier client in Canada for AI Security Engineer.
Added 56 mins ago
S
Product Design Engineer
Synergycom
Windsor, ON
- Contract
Synergy Consulting Group is seeking a Design Release Engineer to support the development, validation, and release of transmission and driveline systems for a leading automotive…
Added 56 mins ago
CS
Specialist, Reliability
Corby Spirit and Wine Limited
Windsor, ON
- Full-time
Collaborates with design and engineering teams to review reliability designs of new mechanical systems.
Added 56 mins ago
BH
Distribution Engineer
BC Hydro
Victoria, BC
- Full-time
Annual Salary: Senior Engineer: 109,680 - 138,720
Added 56 mins ago
BF
Ingénieur, Conception de la cellule/Airframe Design Engineer
Bell Flight
Mirabel, QC
- Full-time
…aboard NASA’s first lunar mission and brought advanced tiltrotor systems to market. Today, we are defining the future of on-demand mobility. At Bell, we are proud to be an iconic company…
Added 56 mins ago
CE
Senior Project Engineer
Cenovus Energy
Calgary, AB
- Full-time
Reporting to the Senior Manager, Project Engineering & Program Management, the Senior Project Engineer is responsible for ensuring the safe, on-budget, on-schedule, and high-quality…
Added 56 mins ago
DT
Mechanical Design Engineer
DCL Technology Group
Maple, ON
- $70,000 to $90,000 CAD / year
- Full-time
…industry, designs and develops innovative fuel conditioning systems (FCS) for industrial engines fueled by wellhead, landfill or digester gas. GraniteFuel’s unique fuel conditioning…

Solstice

Member of Technical Staff - Fullstack AI Engineer (Toronto)

Toronto, ON, Canada

Full-time

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Job details

Job type: Full-time
Experience: 5+ years of software engineering experience.
Posting language: English
Posted: Oct 3, 2026

Original job description

WHY YOU SHOULD JOIN US

At Solstice, we're building AI software that helps life sciences teams turn complex scientific and brand information into marketing content they can create, refine, and review with confidence. We've worked with leading life sciences manufacturers and more than 50 pharma brands. You'll build the systems and experiences that make this work faster and easier.

Build the foundation for how people work with AI. Your work will span the infrastructure that runs agents and the product experiences that help customers direct, inspect, and use their output.
Take on engineering problems with depth. Make long-running agents reliable, stream progress into responsive interfaces, deliver the right context securely, and understand what happens across every step of execution.
Have a direct hand in what we build. Join an early team where you'll shape architecture, make product tradeoffs, and work closely with our co-founders, Yiwen and Aris. You'll see your decisions reach customers and use their feedback to improve the product.

We're backed by Transformation Capital, Twelve Below, Virtue, and the founders of Datavant, Commure, and Paradigm.

SOLSTICE IN TORONTO

We're opening our first engineering office outside New York, in Toronto, and you'll be one of its first engineers. The Toronto team will own a product area end to end, with its own roadmap and on-call. It won't be a queue for work handed over from New York.

Same time zone as New York, and one of our co-founders will be in Toronto with the team.
You'll spend your first month in New York working alongside the team in person. We cover travel and accommodation.
This role will be on-site in Toronto. We'll start remotely for the first few months, with a WeWork stipend for those who prefer it. As the team grows, we'll move into our own Toronto office by the end of the year and work from there five days a week.

ABOUT THE ROLE

We're looking for a Fullstack AI Engineer to build and maintain our agent platform and bring its capabilities into the product. You'll own work across backend services, APIs, agent orchestration, and customer-facing interfaces, with a strong focus on Python and platform engineering.

Python is our primary backend language, and FastAPI powers our APIs. You'll help decide how agents run, recover from failures, access tools and context, and communicate with the application. You'll also build the React and Next.js experiences that give users visibility and control over that work.

You'll partner with product, design, Applied AI, and the broader engineering team to take problems from an initial idea through architecture, implementation, and production. The scope includes both building new capabilities and making the systems behind them easier to operate and extend.

WHAT YOU'LL BE WORKING ON

Build and maintain the agent platform. Use Python, FastAPI, Restate, and Redis to build the shared systems that power our agents. Shape session management, orchestration, tool access, and context delivery so new AI capabilities can build on a dependable foundation.
Design APIs that power the product. Build Python and FastAPI services for content creation, document processing, collaboration, and enterprise integrations. Design clear API contracts and PostgreSQL data models that make complex workflows straightforward to build on.
Solve the hard parts of agent execution. Make long-running workflows recover from failures, handle cancellation and retries, and run in isolated environments. Give agents current documents, assets, and brand context while keeping customer data and permissions properly scoped.
Bring AI workflows to life in the product. Build with React, Next.js, and TypeScript to show streaming progress and tool activity, support reconnectable sessions, and give users intuitive ways to review, accept, or refine AI output.
Make the whole system observable. Connect APIs, orchestration, and agent execution through Datadog and OpenTelemetry tracing, structured logs, metrics, and alerts. Build the visibility to explain failures, find bottlenecks, and improve latency, reliability, and cost.
Make quality measurable. Partner with Applied AI engineers on evaluations and regression checks, using tools such as Braintrust alongside API and integration tests. Turn production traces and customer feedback into better agent behavior and more dependable releases.
Own the path from idea to production. Work with product and customer teams to choose the right problems, make practical tradeoffs, and ship complete features. Deploy, monitor, and improve what you build as customers use it.

SOME IDEAL TRAITS WE'RE LOOKING FOR

5+ years of software engineering experience. You've built and shipped production software, with experience owning backend services or fullstack applications.
Depth in Python and FastAPI. You've shipped and operated production Python services. You can build well-designed FastAPI APIs and understand asynchronous programming, validation, authentication, and error handling.
Strong systems fundamentals. You design clear service contracts and data models, work comfortably with PostgreSQL and Redis, and think through concurrency, transactions, idempotency, and failure recovery.
Experience turning AI into useful software. You've built AI applications or the infrastructure behind them. You can reason about tool calling, context management, agent sessions, and the boundaries between model behavior and application logic.
The ability to deliver across the stack. You're comfortable working in React, Next.js, and TypeScript and connecting an interface to backend APIs. You care about how the product feels, including usability, accessibility, and performance.
A habit of making systems understandable. You use traces, logs, and metrics to investigate production issues and build instrumentation that helps the next engineer diagnose them. Testing, security, and maintainability are part of how you ship.
Ownership and good judgment. You can turn an ambiguous problem into a practical plan, explain the tradeoffs, and follow through. You work closely with others, seek feedback, and care about whether your work solves the customer's problem.

Experience with Restate or Temporal, sandboxed agent execution, streaming systems, or AI evaluation tools is a plus. You don't need experience with every tool in our stack. We value strong fundamentals and the ability to learn quickly. Healthcare or pharma experience is welcome but not required.

BENEFITS

Supplemental health, dental, and vision coverage on top of OHIP
Equity in an early-stage company, granted on the same schedule as our New York team
RRSP matching
Unlimited paid time off
Your first month in New York, with travel and accommodation covered
A stipend for professional development

COMPENSATION

The base salary range for this role is CAD $155,000 to $230,000, plus equity. Where you land depends on your experience, seniority, and the scope of responsibility you take on. We pay at the top of the Toronto market, and we grant equity on the same schedule in every office.

This posting is for an existing vacancy. You must be legally entitled to work in Canada. We can't sponsor work permits for this role at this time.

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More about this job

Responsibilities

You will build and maintain the agent platform, owning backend services, APIs, and customer-facing interfaces. You will also collaborate with product and design teams to implement new AI capabilities and ensure system observability and reliability.

Requirements

The role requires 5+ years of software engineering experience with deep expertise in Python and FastAPI. Candidates must be proficient in fullstack development using React, Next.js, and TypeScript, along with strong systems fundamentals.

Skills

Python
FastAPI
React
Next.js
TypeScript
PostgreSQL
Redis
Agent orchestration
Systems architecture
API design
Datadog
OpenTelemetry
Cloud infrastructure
Software engineering
Fullstack development

Benefits

Supplemental health coverage
Dental coverage
Vision coverage
Equity
RRSP matching
Unlimited paid time off
Travel and accommodation for onboarding
Professional development stipend

Visa sponsorship

Not detected in the job text

Hiring contact

Yiwen

Keywords

Python
FastAPI
React
Next.js
TypeScript
PostgreSQL
Redis
Restate
Temporal
Datadog
OpenTelemetry
AI
Machine Learning
Agent orchestration
Fullstack
API
Software Engineering
Life Sciences
Pharma
Braintrust
Cloud
Infrastructure
System design
Asynchronous programming
Authentication
Observability
Metrics
Logs
Tracing
Product development

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