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Added 3 hours ago
FH
Data Engineer
Fraser Health
Surrey, BC
- Full-time
As a Data Engineer, you will lead the team in data strategy, analysis, integration, and management. Your work will significantly impact the delivery and utilization of our data products…
Added 3 hours ago
FH
Senior Data Engineer
Fraser Health
Surrey, BC
- Full-time
The Senior Data Engineer provides senior consulting to Fraser Health executive within an assigned portfolio in the areas of data and data management, decision support and in corporate…
Added 4 hours ago
KC
Senior Embedded Software Designer
Kepler Communications Inc.
Toronto, ON
- Full-time
We're on the hunt for a top-tier Senior Embedded Software Engineer. Your focus will be on software development and maintenance required for both space and ground-based assets for a growing…
Added 6 hours ago
H
Senior Power Applications Engineer
Hitachi
London, ON · (HE)Office_ON, Stoney Creek
- Full-time
Ready to help shape the future of energy? Join Hitachi Energy as a Senior Power Applications Engineer and play a key role in delivering advanced software solutions that support reliable,…
Added 6 hours ago
AI
BAS Technologist
Ainsworth Inc
Surrey, BC
- Full-time
We’re looking for a BAS Engineering Technologist to design and support building automation systems from engineering through commissioning. This role includes troubleshooting customer…
Added 7 hours ago
CI
Principal Engineer, Risk and TFM Technologies
CPP Investments | Investissements RPC
Toronto, ON
- Full-time
Deep expertise in distributed systems architecture, cloud technologies, software engineering, and modern engineering practices.
Added 11 hours ago
P
Senior Software Engineer- Wireless (Contract)
Photon-IV
Canada
- Full-time
The Senior Software Engineer- Wireless is a contract hybrid role based in Canada, with a mix of on-site collaboration and work-from-home flexibility. This role is responsible for leading…
Added 11 hours ago
A
Smart 3D Administration and Support Specialist
AtkinsRéalis
Mississauga, ON
- Full-time
…administration including but not limited to maintenance, customization, integration with other software, software…
Added 14 hours ago
ST
Senior Systems Installation Integrator
SEGULA Technologies
Montreal, QC
- Full-time
Position Overview: We are seeking a Senior Systems Installation Integration Engineer to provide high-level technical leadership for complex aircraft development and sustaining initiatives.…
Added 15 hours ago
AS
Machine Learning Engineer
AgileGrid Solutions
Canada
- Full-time
We are seeking a talented and driven Machine Learning Engineer to join the Qualcomm AI Processor Solutions team. This role offers an exciting opportunity to contribute to the development of…
Added 15 hours ago
S
Member of Technical Staff - Fullstack AI Engineer (Toronto)
Solstice
Toronto, ON
- Full-time
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…
Added 18 hours ago
S
Patient Experience iCare Exchange Integrations Engineer
Sanofi
Toronto, ON
- Full-time
As a Patient Experience iCare Insights/Exchange Integrations Engineer at Sanofi, you will play a pivotal role in transforming patient data into actionable insights that drive better health…
Added 19 hours ago
CE
Program & Team Leader – Power Systems (HV/MV) Utility Engineering (with Renewable integration)
Colm Engineering Ltd
Vaughan, ON
- Full-time
…utility-scale markets. Energy Storage (BESS) and renewable integration projects form an important subset of this work, and the successful candidate will be able to perform and oversee…
Added 20 hours ago
R
Senior Director, Program Delivery
RBC
Toronto, ON
- Full-time
Added 20 hours ago
R
Lead Full Stack Developer
RBC
Toronto, ON
- Full-time
Strong background in REST API, system design and application integration, including data mapping between source and target systems.
Added 21 hours ago
W
Naval Project Quality Assurance Engineer - NETE
Weir
Dartmouth, NS
- Full-time
Provide Quality Assurance (QA) expertise across modelling, data management, data integration, analysis, and Independent Verification & Validation (IV&V) services in support of the Royal…
Added 22 hours ago
B
Professional, Engineering - Avionics Systems
Bombardier
Dorval, QC
- Full-time
Be responsible for the timely integration of systems, such as AFCS, Communication (VHF, HF, SATCOM, Datalink), Navigation (ADF, VOR, ILS, DME, TCAS, Transponder, IRS, GPS, FMS, Weather…
Added 22 hours ago
HR
Signaling System Engineer
Hitachi Rail
Mississauga, ON
- Full-time
3 -5 years’ experience as a lead systems/design engineer in signaling system projects
Added 23 hours ago
L
Principal Engineer - Retail Systems
lululemon
Vancouver, BC
- Full-time
As a Principal Engineer, you will define the technical vision and implementation approach for major technology initiatives across lululemon’s global retail systems landscape. You will serve…
Added 23 hours ago
ME
Electrical Service Technologist/Engineer
Medatech Engineering Services Ltd.
Collingwood, ON
- Full-time
As an Electrical Service Technologist/Engineer you will be on the front line, providing engineering customer support and working with suppliers to resolve engineering, field and product…
Added 23 hours ago
ME
Intermediate Software and Control Systems Engineer
Medatech Engineering Services Ltd.
Collingwood, ON
- Full-time
If you’re an experienced Intermediate Software and Control Systems Engineer, think about joining our team. You will design, develop, and integrate control systems for heavy equipment,…
Added 23 hours ago
OP
RF Systems Engineer
Open People Network (OPN)
Toronto, ON · Greater Toronto Area, Canada
- Full-time
You will own the RF detection layer end to end: architecture, software-defined radio integration, signal detection and protocol identification, and the pipeline that feeds RF tracks into…
Added 23 hours ago
M
Senior Software Engineer
Microsoft
Vancouver, BC
- Full-time
This role is suited for engineers with experience building native C++ software close to the operating system, particularly in performance-sensitive and reliability-critical environments.…
Added 1 day ago
T
Data Platform Engineering Manager
TD
Toronto, ON
- Full-time
…Technology Data Management, this role leads the onboarding, integration, transformation, and delivery of technology data from infrastructure, cyber, cloud, AI, and enterprise systems into a…
Added 1 day ago
T
Data Architect, Technology Data Management
TD
Toronto, ON
- Full-time
Support onboarding and integration of new systems into the enterprise data fabric.

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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