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Added 10 mins ago
Software Developer – Senior - RQ11686
S M Software Solutions Inc
Toronto, ON
Internship
ServiceNow Certified Technical Architect (CTA) considered a strong asset
Added 10 mins ago
Software Developer – Senior - RQ11686
S M Software Solutions Inc
Toronto, ON
Internship
ServiceNow Certified Technical Architect (CTA) considered a strong asset
Added 10 mins ago
Software Developer – Senior - RQ11686
S M Software Solutions Inc
Toronto, ON
Internship
ServiceNow Certified Technical Architect (CTA) considered a strong asset
Added 40 mins ago
Application Architect – EHealth - RQ00386
S M Software Solutions Inc
Fredericton, NB
Internship
We are seeking an experienced Application Architect – EHealth with extensive experience in provincial healthcare, Electronic Health Records (EHR) applications, eHealth platforms,…
Added 40 mins ago
Development Team Lead
UniSysTech Consulting
Toronto, ON · Greater Toronto Area, Canada
Other
As a technical lead, you will bridge the gap between architecture, product strategy, and engineering execution - mentoring talent, driving engineering best practices, and ensuring robust…
Added 40 mins ago
Application Architect – EHealth - RQ00386
S M Software Solutions Inc
Fredericton, NB
Internship
We are seeking an experienced Application Architect – EHealth with extensive experience in provincial healthcare, Electronic Health Records (EHR) applications, eHealth platforms,…
Added 40 mins ago
Application Architect – EHealth - RQ00386
S M Software Solutions Inc
Fredericton, NB
Internship
We are seeking an experienced Application Architect – EHealth with extensive experience in provincial healthcare, Electronic Health Records (EHR) applications, eHealth platforms,…
Added 40 mins ago
Digital Architect – Data - GOAPRDJP00000987
S M Software Solutions Inc
AB · Edmonton, AB
Full-time
We are seeking a highly experienced Digital Architect – Data to support service innovation, program review, and digital transformation projects across the Government of Alberta (GoA). The…
Added 40 mins ago
Digital Architect – Data - GOAPRDJP00000987
S M Software Solutions Inc
AB · Edmonton, AB
Full-time
We are seeking a highly experienced Digital Architect – Data to support service innovation, program review, and digital transformation projects across the Government of Alberta (GoA). The…
Added 40 mins ago
Digital Architect – Data - GOAPRDJP00000987
S M Software Solutions Inc
AB · Edmonton, AB
Full-time
We are seeking a highly experienced Digital Architect – Data to support service innovation, program review, and digital transformation projects across the Government of Alberta (GoA). The…
Added 41 mins ago
Data Scientst - Student Position - Sales Business Analytics
Apple
Toronto, ON
- Architect and build agentic workflows, Retrieval-Augmented Generation (RAG) systems, and custom LLM applications against internal knowledge sources.
Added 1 hour ago
Project Engineering Director
Worley
Markham, ON
Full-time
Lead technical and organizational interfaces among the owner, architect-engineer, reactor technology provider, constructors, suppliers, utilities, operations, and other project partners.
Added 1 hour ago
Cloud Solution Architect - Data & AI
Microsoft
Toronto, ON
Full-time
…turn innovation into measurable business impact. Through deep technical expertise and differentiated go-to-market execution, we win competitively, capture market share, and scale repeatable…
Added 1 hour ago
Principal Cloud & AI Apps Solution Engineer
Microsoft
Toronto, ON
Full-time
…As a Cloud & AI Apps Solution Engineer, you will bring deep technical expertise in agentic AI, AI application architecture, and cloud-native development while helping customers turn…
Added 1 hour ago
Senior Director, Data Center Facilities Development
Oracle
Canada
$193,600 to $414,400 USD / year
Full-time
The position requires a combination of organizational leadership, technical depth, design governance, and portfolio management. The successful candidate will establish clear design…
Added 1 hour ago
Senior AEM Cloud Architect
enableIT
Toronto, ON
$70 to $85 USD / hour
Contract
We are seeking a Senior AEM Cloud Architect / Technical Lead with 8+ years of AEM experience, including 3+ years with AEM as a Cloud Service, to lead enterprise AEM transformation and…
Added 2 hours ago
Sr. Systems Administrator, System Architect, Infrastructure Administrator
STELCO - The Steel Company of Canada
Brampton, ON
Full-time
Role Description The Sr. Systems Administrator, System Architect, Infrastructure Administrator is a full-time, on-site role based in Brampton, ON. This position is responsible for…
Added 2 hours ago
Project Delivery Manager, Building Renewals
OMICRON CANADA INC.
Vancouver, BC
$110,000 to $150,000 CAD / year
…project outcomes informed by collaboration, innovation, and technical…
Added 2 hours ago
Cloud Analyst
Sun Life Québec
Montreal, QC
Full-time
Support proof-of-concept initiatives, technical evaluations, and implementation activities for cloud and container platform capabilities.
Added 2 hours ago
Solutions Architect
Hiboo Networks
Ottawa, ON · Kanata, ON
Full-time
Hiboo Networks Inc. is seeking a Solutions Architect who will primarily support our Account Executives but also work with vendors and OEMs on technical solutions. You will understand the…
Added 2 hours ago
ServiceNow Developer Associate - Summer 2027
RSM US LLP
Calgary, AB
Full-time
…will collaborate with cross-functional teams as a ServiceNow technical expert to help clients tailor the ServiceNow platform to their needs and maximize the value of their investment in…
Added 3 hours ago
Data Engineer
GEI Consultants, Inc.
Vaughan, ON
Full-time
Azure or Databricks certifications (e.g., Azure Data Engineer Associate, Azure Solutions Architect Expert, Databricks Data Engineer Professional) are a plus.
Added 3 hours ago
Station Manager, Construction Technical Office
Ontario Transit Group - Ontario Line - Southern Civil, Stations & Tunnel
Toronto, ON
Full-time
…stakeholders, and OTG teams to resolve design issues, manage technical deliverables and changes, support commercial administration, and maintain control of the allocated ESDC…
Added 3 hours ago
Principal, Infrastructure Architecture
RBC
Toronto, ON · Mississauga, ON
Full-time
You will provide direct support to development teams and to the Lead infrastructure Architect. May be called upon to perform the duties of the Lead Infrastructure Architect as events…
Added 3 hours ago
Senior Manager, Business Systems
Docker
Remote, Canada
Full-time · Remote
Pair heavily with the Technical Architect to execute against their architectural roadmap, with dotted-line accountability for delivering their priorities through your team while retaining…

Apostra

Staff Software Engineer (Fullstack, BE-leaning)

ON, Canada
United Counties of Stormont, ON, Canada

Pay: The salary range for this role is $180k-$230k USD / $190k-$245k CAD.
Job type: Contract
Apply by: Oct 29, 2026
Posting language: English
Posted: Sep 29, 2026

Apply About employer

Applications open in a new tab.

Original job description

About Apostra

Apostra is defining a new future for advertising, for both humans and their agents.

Our founders helped build the technology that shaped advertising as we know it today. Now, we’re reimagining it from the ground up for a world of people and agents, with human intent at its heart.

We’re creating a place where advertisers, media owners and their agents can discover and act on every kind of media, opening up opportunities that have historically been fragmented and hard to access.

About The Role

We’re building the future of programmatic advertising through AI agents. Our technical team is creating the infrastructure that enables AI agents to discover, negotiate, and transact media inventory autonomously.

In this role, you’ll be a technical leader responsible for the APIs, protocols, and agent interfaces that power our agentic advertising platform. You’ll design systems where AI agents are first-class participants, with their own authentication, capabilities, and communication standards.

You’ll work at the intersection of advertising technology, distributed systems, and emerging AI agent frameworks - making architectural decisions that shape how our marketplace evolves.

This is a Fullstack (80/20 backend leaning), hands-on leadership role. You’ll write production code, prototype new agent communication patterns, review system designs, and mentor engineers while setting technical direction.

This isn’t a typical engineering role

We’re operating in a space without a fixed playbook, so this role is best suited for builders who are comfortable creating structure where none exists.
Our approach favors rapid experimentation over upfront perfection - we test, learn, and then formalize what works.
The pace is fast and often pushes beyond what feels comfortable. For the right person, that’s part of the appeal.
We’re also looking for engineers who are already actively exploring AI - this isn’t a “learn it on the job” environment.

Responsibilities

Design and architect scalable APIs for both human and AI agent clients
Lead development of agent interfaces, MCP servers, and A2A communication layers
Build and operate high-throughput systems for real-time advertising transactions
Evaluate and integrate emerging agent frameworks and protocols
Partner with product and design to define clear, agent-friendly API contracts
Drive architectural decisions around authentication, protocols, and transaction flows
Collaborate with external DSPs, SSPs, and agent platform partners
Mentor engineers on API design, distributed systems, and agent architectures
Anticipate and address edge cases in autonomous agent behavior

Qualifications

8+ years building distributed backend systems at scale
4+ years in a technical leadership role
4+ years working professionally within the AdTech ecosystem
Strong expertise in API design and architecture (REST, event-driven systems, auth, versioning)
Experience with AI agent frameworks and communication protocols, or the ability to rapidly learn and evaluate them
Proficiency with TypeScript/Node.js, React, and cloud platforms (GCP or AWS)
Experience designing systems for autonomous or semi-autonomous decision-making
Track record of mentoring engineers and fostering a collaborative team culture
Comfort working in fast-moving, evolving environments

Tech Stack

API Layer: TypeScript/Node.js, REST and event-driven services
Agent Interfaces: MCP servers and A2A protocol handlers
Data: PostgreSQL, BigQuery, Cloud Storage, Redis

As the agent ecosystem evolves, you’ll help evaluate new technologies and ensure our marketplace remains at the forefront.

Compensation

The salary range for this role is $180k-$230k USD / $190k-$245k CAD.

These ranges span multiple location-based salary bands across the US and Canada. Candidates are aligned to a narrower range based on geographic market compensation data specific to where they live, and final offers reflect demonstrated skills, experience, and role expectations.

Benefits & Perks

Details vary by location (USA/Canada), but all employees receive:

Health & wellness: Comprehensive medical, dental, and vision coverage with significant employer contribution; short- and long-term disability coverage; health savings/flexible spending options
Retirement: Employer-matched retirement savings plan (401(k) or RRSP)
Time off: Generous paid time off, statutory holidays, and year-end office closure
Parental leave: 13 weeks fully paid (eligibility requirements apply)
Remote work: Company-provided home office equipment, setup stipend, and access to WeWork spaces
Equity: Stock options

A Note To Applicants

We believe that all people are capable of great things. We encourage you to apply even if you do not meet all of the requirements that are listed within this job description.

Apply About employer

More about this job

Responsibilities

Design and build scalable APIs, agent interfaces, MCP servers, and A2A communication layers for an AI-powered programmatic advertising marketplace. Lead architectural decisions and production development, collaborate with advertising and platform partners, and mentor engineers on APIs, distributed systems, and agent architectures.

Requirements

Requires 8+ years building distributed backend systems at scale, 4+ years in technical leadership, and 4+ years of professional AdTech experience. Candidates should bring strong API architecture expertise, experience with AI agent frameworks or the ability to evaluate them quickly, proficiency in TypeScript/Node.js, React, and GCP or AWS, and a record of mentoring engineers.

Skills

Distributed Systems
Technical Leadership
API Design
TypeScript
Node.js
React
REST
Event-Driven Systems
Authentication
AI Agent Frameworks
MCP Servers
A2A Protocol
AdTech
Cloud Platforms
PostgreSQL
BigQuery

Benefits

Medical Insurance
Dental Insurance
Vision Insurance
Disability Coverage
Health Savings Account
Flexible Spending Account
Paid Time Off
Statutory Holidays
Year-End Office Closure
Paid Parental Leave
Home Office Equipment
Home Office Setup Stipend
WeWork Access
Stock Options

Visa sponsorship

Not detected in the job text

Keywords

Programmatic Advertising
AdTech
AI Agents
Distributed Systems
Scalable APIs
REST
Event-Driven Services
API Authentication
API Versioning
MCP Servers
A2A Protocol
TypeScript
Node.js
React
GCP
AWS
PostgreSQL
BigQuery
Cloud Storage
Redis
Real-Time Transactions
DSPs
SSPs
Agent Frameworks
Agent Communication Protocols
System Architecture
Technical Mentorship

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