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Added 1 month ago
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Senior Full-Stack Software Development Engineer
Remitly
Burnaby, BC
- Full-time
As a Senior Full-Stack Software Development Engineer, you will own meaningful features end-to-end - from technical design through production - partnering closely with product, design, and…
Added 4 months ago
S&
Lead Full Stack Developer
Saatchi & Saatchi Canada
Canada
- Full-time
…database migration, debugging a prod incident, mentoring a senior engineer, or sitting in a client architecture conversation. You thrive at the intersection of architecture, engineering,…
Added 3 months ago
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Engineering Lead, Quality
Vancity
Toronto, ON · Vancouver, BC
- Full-time
As a Engineering Lead, Quality, you will play a senior technical role responsible for ensuring the quality, reliability, and performance of member-facing platforms through hands-on…
Added 3 months ago
R
Staff Software Engineer
RBGlobal
Burnaby, BC
- Full-time
We are seeking a highly skilled Staff Software Engineer to join our Data Engineering team. In this senior technical leadership role, you will drive the architecture, design, and evolution…
Added 3 months ago
Sr Guidewire Developer -PolicyCenter
Aviva
Markham, ON
As a Senior Guidewire PolicyCenter Developer, you will be responsible for the design, configuration, and development of PolicyCenter solutions that support Aviva’s core policy lifecycle.…
Added 3 months ago
TG
Senior Quality Assurance Engineer
TMX Group
Toronto, ON
- $65 to $85 CAD / hour
- Full-time
We are seeking a highly skilled and detail-oriented QA Automation Engineer for a 4-month contract to join our TSX Trust Web Team. In this role, you will design, develop, and execute…
Added 1 month ago
Senior Backend Product Engineer, Menu Operations
HelloFresh
Toronto, ON
As we continue evolving this system, extending its capabilities, and preparing for expansion, we are looking for a Senior Software Engineer with strong backend experience, a talent for…
Added 5 months ago
AC
Guidewire Rating Developer
Aviva Canada
Markham, Ontario
- Full-time
…components within Guidewire PolicyCenter. You will collaborate with senior developers, architects, and actuarial partners to support our modernization and cloud transformation initiatives…
Added 1 month ago
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Senior Software Engineer (Back-end/Server)
Trulioo
Vancouver, BC · Toronto, ON
- Full-time
Trulioo is looking for a Senior Software Engineer to lead the architecture and development of high-throughput, low-latency back-end services that power our Document and Biometric…
Added 6 months ago
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Principal Software Engineer - AI
Boomi
Vancouver, British Columbia
- Full-time
As a Principal Software Engineer, you will be a technical leader driving the design and implementation of complex backend systems at scale. You will set technical direction, guide team…
Added 1 month ago
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Senior Test Automation Engineer – AI Testing
Cognizant
Montreal, QC
- Full-time
…comparables. Maîtrise des langages de programmation, notamment Java et Python, ainsi qu’une expertise avérée dans la mise en œuvre de cadres d’automatisation. Expérience concrète en…
Added 6 months ago
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Senior Software Engineer
PointClickCare
Mississauga, Ontario
- $142,000 to $158,000 CAD / year
- Full-time
For Hybrid Roles: If this role is Hybrid, there will be an expectation to reside within commutable distance to the office/location specified in the job listing. This will include, but not…
Added 1 month ago
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Senior Software Engineer, AI Platform
eBay
Toronto, ON
- Full-time
…faster while maintaining high quality and performance. As a Senior Software Engineer – Backend, you will architect and develop core platform services, solving complex technical problems and…
Added 1 month ago
EN
Senior Full Stack Developer – Generative AI & Autonomous Agents - Toronto, Canada - Hybrid (10038)
Extreme Networks
Toronto, ON
- Full-time
We are seeking an experienced Senior Full Stack Developer with deep expertise in backend systems (Java, Python, microservices) and modern UI frameworks (Angular, React) to join our…
Added 1 month ago
WT
Senior Software Developer, Post-Trade Management
Wealthsimple Technologies
Remote, Canada
- $151,200 to $189,000 CAD / year
- Full-time
- Remote
As a Senior Software Developer on the Post-Trade Management team, you will design and deliver the software that keeps post-trade processing running smoothly: from clearing and settlement to…
Added 1 month ago
Staff Software Engineer, Fullstack
Fivetran
Toronto, ON
As a staff software engineer in Reverse ETL, you’ll be on the front lines of integrating data activation capabilities into the Fivetran product along every dimension – UI, authentication,…
Added 1 month ago
Senior Data Platform Engineer
Tubi - Canada
Toronto, ON
The team is small and senior. Each engineer owns major platform components: you design it, build it, and support it in production.
Added 1 month ago
Senior Software Engineer - Brand Platform - Backend
Faire
Kitchener, ON · Toronto, ON
As a Senior Back-end on the Brand Platform team, you'll collaborate with us to:
Added 4 months ago
IL
Senior Software Quality Engineer
Invesco Ltd.
Charlottetown, Prince Edward Island
- Full-time
The Senior Software Quality Engineer leads the design, execution, and oversight of complex test strategies to ensure the delivery of high quality, reliable software products for Invesco’s…
Added 1 month ago
Software Engineer - Retailer Experience & Growth - Fullstack, Backend or Frontend
Faire
Toronto, ON · Kitchener, ON
As a Senior Engineer on our Growth team, you'll build products and experiments that directly influence how retailers discover, adopt, and engage with Faire. Your work will sit at the…
Added 4 months ago
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Tech Lead, Software Development
Univeris
Toronto, Ontario
- Full-time
At Univeris, a Software Development Technical Team Lead is a hands-on senior software engineer and people manager, accountable for the technical design, development, quality of…
Added 4 months ago
S
Senior Platform Engineer
Scalar
Remote, Canada
- $150,000 to $250,000 CAD / year
- Full-time
- Remote
SDK generation - turning a customer's OpenAPI document into type-safe client libraries across TypeScript, Python, Go, PHP, Java, and Ruby, with code samples and automated GitHub sync
Added 2 months ago
CO
Senior Staff Software Engineer - Mobile(Android)
Capital One
Toronto, Ontario
- Full-time
161 Bay Street (93021), Canada, Toronto,Toronto, Ontario,Senior Staff Software Engineer - Mobile(Android)
Added 1 month ago
Senior Automation Engineer
Tubi - Canada
Toronto, ON
We are looking for a talented Automation Engineer to join our Automation Engineering team in Toronto. In this role, you will be responsible for designing and implementing automated tests…
Added 4 months ago
TS
Sr. Software Developer - Hybrid/Secret Cleared
The Source Staffing
Ottawa, Ontario
- Full-time
Senior Software Developer - Hybrid/Secret Cleared 90-110k

Lead Full Stack Developer

Canada

Compensation: The salary range for this position is $130,000–$150,000 per year, based on experience, skills, and relevant certifications. · Full-time

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Job details

Pay: Compensation: The salary range for this position is $130,000–$150,000 per year, based on experience, skills, and relevant certifications.
Job type: Full-time
Posting language: English
Posted: Jun 5, 2026

Original job description

Saatchi & Saatchi is an advertising agency with the belief that creativity, data, media and technology should all work together, and we use that to influence human behavior and drive success for clients. S&S is one of the world's largest agency networks with 114 offices and more than 6000 employees globally.

Here in our Toronto office we work with some of the countries most valued brands including Toyota, Buckley's, and Children's Advil, as well as several under the Mondelez banner (Crispers, Oreo, and Chips Ahoy just to name a few). We’re an award winning agency in both creativity and effectiveness, so it’s really important for us here to convert that innovation and the great ideas into real tangible business results for the organization.

Overview

Saatchi & Saatchi is seeking a Lead Full Stack Developer for an innovative AI platform initiative.

You have 8+ years building production software systems and at least a few years leading or anchoring a team technically. You are a hands-on builder and you hold the architectural picture of a multi-tier platform - React frontend, Spring Boot backend, FastAPI agentic services, agent SDKs on top of LLM providers. You are equally comfortable reviewing a database migration, debugging a prod incident, mentoring a senior engineer, or sitting in a client architecture conversation. You thrive at the intersection of architecture, engineering, and program reality.

Responsibilities

Own the technical direction across the platform's tiers - frontend, backend, agentic/AI services, data, and integrations - and hold the shared mental model of how the system actually fits together.
Pair closely with the Senior Technical PM and Program Director to translate product intent into a credible technical plan, and to surface what is genuinely hard vs. what is just unfamiliar.
Lead architecture and design reviews, write the deciding ADR when needed, and keep a small set of vendor-neutral patterns the team can lean on instead of a sprawl of frameworks.
Stay hands-on in the code - pick up meaningful slices of work, especially across tier boundaries (e.g. backend ↔ agentic, frontend ↔ auth/RBAC, infra-aware app changes).
Be a first-class code reviewer across the stack: you set the bar for clarity, testability, security, and operability, and you raise the team's bar by reviewing thoughtfully.
Mentor mid-level and senior engineers; coach them through technical decisions, on-call experiences, and difficult code reviews.
Partner with the Platform Engineer on production reliability - capacity, scaling, observability, and incident response - and own application-side reliability concerns.
Drive integration architecture with internal and external systems using API-first and event-driven patterns; ensure identity, authorization, data protection, and auditability are built in, not bolted on.
Champion the LLM/agent layer - agent orchestration, tool/plugin design, prompt and evaluation loops, provider abstraction (e.g. Vertex AI, Claude on Vertex, OpenAI) - and keep us out of vendor lock-in we cannot pay for.
Build redundancy on yourself - pair, document, rotate ownership, and ensure no critical system has exactly one person who understands it.

Qualifications

8+ years in software engineering, with meaningful time as a hands-on lead, staff engineer, or solutions architect on production systems.
Proven experience designing and delivering complex, multi-service platforms - not just one service or one tier.
Strong backend depth in at least one modern stack (Java/Spring Boot, Python/FastAPI, Node, Go, .NET); able to ramp on the others.
Solid frontend literacy - comfortable reading and reviewing modern React/TypeScript code and reasoning about state management, auth, and performance.
Strong cloud architecture background, preferably GCP (we run primarily on GKE); willing to deepen wherever the platform takes us.
Deep understanding of API design, integration patterns, distributed systems, and the failure modes that come with them.
Experience with containerization, Kubernetes, and modern CI/CD; you do not need to be a DevOps specialist, but you must operate well in that world.
Real production experience with AI / LLM systems - agents, RAG, evaluation, tool integration - or a strong, demonstrable plan for getting there.
Comfortable working within Agile delivery models (Scrum, Kanban, or whatever variant actually ships).
Excellent communication: you can explain a complex architecture to a non-technical executive and disagree with a senior engineer respectfully and with evidence.

Required Soft Skills

Hands-on bias - you reach for the code, the logs, and the diagram before you reach for the meeting invite.
Calm, decisive judgment when there is no obviously right answer.
Strong written communication - you can write a one-page architecture rationale that future-you will still understand.
Generous mentorship instinct - you make the people around you better, on purpose.
Comfortable with ambiguity and willing to make reversible decisions quickly while flagging the irreversible ones for broader input.
Pragmatic about technology choices - you optimize for the team's ability to operate the system, not for personal stack preferences.
Honest about what you do and do not know; willing to say 'I'll find out' and then actually find out.

Nice to Have

Prior experience working inside Publicis Groupe or another large holding-company agency network.
Production experience with Google ADK, LangGraph, LlamaIndex, or comparable agent frameworks.
Experience with event-driven architectures, domain-driven design, and contract-first integration patterns.
Background in regulated or privacy-sensitive environments (identity, healthcare, financial, marketing-compliance).
Experience supporting multiple products or clients on a shared platform (multi-tenant, multi-brand, white-label).
Comfort with Terraform, Kustomize, or other IaC tooling at a 'can read and improve' level.
Track record contributing to internal developer experience - patterns, scaffolds, golden paths.

Additional Information

Location & Eligibility: Candidates must be based in Canada, with valid Canadian work authorization of at least 12 months.

Hybrid Work: This role is remote. If you are GTA-based, the team meets once a month at our Toronto office (111 Queen St. E, Suite 200, Toronto, ON M5C 1S2).

Time Off:

Up to 3 weeks vacation, with additional paid closure between Christmas and New Year's

Extended long weekends for provincial holidays - we give you both the Monday and Friday so you get a full 4-day break

10 personal days per year

Flexibility & Global Mobility: After completing one year, work remotely for up to 6 weeks per year from any of our 50+ global offices through our Work Your World program.

Benefits: Comprehensive group coverage including:

Medical, dental, and vision care

Psychological and paramedical services

Disability insurance

Fertility support and gender-affirming care

Dedicated internal guidance programs for employees navigating cancer, fertility treatments, or gender transition

Parental Leave Top up: A 100% salary top up program once approved for Employment Insurance for the first 6 weeks of your parental Leave.

Defined Contribution Pension Plan: Employees have the option to sign up to voluntarily contribute to a DCPP where Saatchi will match the employee contributions up to 5% after completing one year.

Gym Membership: Corporate Membership rates at Good Life Fitness

Free access to a financial planner & more…

Compensation: The salary range for this position is $130,000–$150,000 per year, based on experience, skills, and relevant certifications. We believe in pay transparency and are committed to offering competitive, market-aligned compensation.

We use artificial intelligence (AI) tools to support parts of our hiring process, such as reviewing applications or analyzing resumes. These tools assist our recruitment team but never replace human decision-making. We believe in a human-first approach, where your experience and potential are recognized by people.

Saatchi & Saatchi is committed to building a diverse workforce representative of our community. We encourage and are pleased to consider all qualified candidates, without regard to race, colour, citizenship, religion, sex, marital / family status, sexual orientation, gender identity, aboriginal status, age, disability or persons who may require an accommodation, to apply. If you require a specific accommodation please contact Human Resources at 416-925-7733 or by email at inquiries@publicisna.com.

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More about this job

Responsibilities

Own the technical direction across the platform's tiers and translate product intent into a credible technical plan. Lead architecture and design reviews while mentoring mid-level and senior engineers.

Requirements

Candidates should have 8+ years in software engineering with experience in leading production systems. Strong backend and frontend skills are required, along with a solid understanding of cloud architecture and API design.

Skills

Full Stack Development
React
Spring Boot
FastAPI
Cloud Architecture
API Design
Distributed Systems
Kubernetes
CI/CD
AI Systems
Agile Methodologies
Mentorship
Technical Leadership
Database Migration
Code Review
Integration Architecture

Benefits

Medical
Dental
Vision Care
Psychological Services
Paramedical Services
Disability Insurance
Fertility Support
Gender-Affirming Care
Parental Leave Top Up
Gym Membership
Financial Planning

Visa sponsorship

Not detected in the job text

Keywords

Full Stack Developer
Software Engineering
Production Systems
React
Spring Boot
FastAPI
Cloud Architecture
GCP
Kubernetes
CI/CD
AI
LLM
Agile
API Design
Distributed Systems
Mentorship
Technical Leadership
Database Migration
Code Review
Integration Architecture
Event-Driven Architecture
Domain-Driven Design
Terraform
Kustomize
Publicis Groupe
Advertising
Creative
Data
Media
Technology

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