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Added 12 mins ago
AI Data Lead
Doane Grant Thornton LLP
Toronto, ON
Full-time
…trying to say is that we’re a large and growing professional services firm that still feels like a community. We employ about 3000 people across Canada, and we truly care about our…
Added 26 mins ago
Project Manager - Data Solutions
Procom
Toronto, ON
$75 to $100 CAD / hour
Contract
On behalf of our Financial Services client, Procom is searching for a Project Manager for a 6-month role. This position is a hybrid position with 3 days onsite at our client’s Toronto…
Added 26 mins ago
Senior Software Engineer
Supernova Technology™
Toronto, ON
Full-time
…defining the architecture and technical vision for Supernova’s cloud-based Security-Based Lending (SBL) SaaS platform. You will be responsible for designing scalable, high-performing, and…
Added 26 mins ago
SAP FICO Manager (ERP Transformation)
Tarkett
Toronto, ON
Full-time
…Contrôle dans le cadre d’une transformation SAP S/4HANA Public Cloud déployée en plusieurs phases. Il s’agit d’un rôle concret, stratégique et très responsabilisant, relevant du directeur…
Added 26 mins ago
SAP FICO Manager (ERP Transformation)
Tarkett
Montreal, QC
Full-time
…Contrôle dans le cadre d’une transformation SAP S/4HANA Public Cloud déployée en plusieurs phases. Il s’agit d’un rôle concret, stratégique et très responsabilisant, relevant du directeur…
Added 26 mins ago
Principal Architect - Platform
Nokia
Ottawa, ON · Kanata, ON
Full-time
The successful candidate will lead the design and development of scalable, fault-tolerant platforms, leveraging Kubernetes, DevOps, and cloud/on-prem technologies. As the Sr. Principal…
Added 27 mins ago
Senior Backend Principal Developer - Vice President
Citi
Mississauga, ON
Full-time
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow…
Added 27 mins ago
Senior IAM & Cyber Assurance Analyst
AIMCo
AB · Calgary, AB · Edmonton
Full-time
Working closely with Technology, Cyber Security, Risk, Procurement, Legal, and business teams, you will lead initiatives that enhance identity governance, access controls, authentication…
Added 42 mins ago
Senior Mechanical Engineer, Data Centers
AECOM
Markham, ON
$125,000 to $175,000 CAD / year
Full-time
There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big…
Added 42 mins ago
Senior Electrical Engineer, Data Centers
AECOM
Markham, ON
$125,000 to $175,000 CAD / year
Full-time
There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big…
Added 57 mins ago
Supply Manager
Trilyon, Inc.
Canada
Contract
For over 16 years, Trilyon has been at the forefront of providing comprehensive global workforce solutions and staffing services. Leveraging our extensive expertise across multiple domains…
Added 57 mins ago
Software Developer Intern - SOTI MobiControl Apple HQ (January 2027 12 Months)
SOTI
Mississauga, ON
Full-time
…existing software applications. These applications range from cloud-based solutions, mobile apps for Android or iOS, middle tier server software or backend database…
Added 1 hour ago
Business Intelligence Manager
Linamar Corporation
Guelph, ON
Full-time
Lead the acquisition, integration, and management of data from ERP, manufacturing, business, cloud, and external systems.
Added 1 hour ago
Software Developer, Subsurface Applications (Associate - Senior) Landmark
Halliburton
Calgary, AB
We are looking for the right people - people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop…
Added 1 hour ago
Digital Solution Architect Lead Advisor
NTT DATA Services
Halifax, NS
We are currently seeking a Digital Solution Architect Lead Advisor to join our team in Halifax, Nova Scotia (CA-NS), Canada (CA).
Added 1 hour ago
Senior Vulnerability Management Analyst
BRP
Montreal, QC
Lead enterprise vulnerability management activities across on-premises, cloud, and hybrid environments.
Added 1 hour ago
Senior Software Developer, BE
Coursera Sourcing
Toronto, ON
As a Staff Software Developer on the Monetization team, you'll lead technical initiatives and take significant ownership over service architecture, product API development, and data…
Added 1 hour ago
Senior IT Systems Administrator (MSP)
Myriad Information Technology Solutions Inc. - Myriad Technologies
Chilliwack, BC
Full-time
Myriad Information Technology Solutions is an independently owned Managed Services Provider headquartered in Chilliwack, BC. We deliver managed IT services, cybersecurity, cloud solutions,…
Added 1 hour ago
Senior Software Developer, BE
Coursera
Toronto, ON
As a Staff Software Developer on the Monetization team, you'll lead technical initiatives and take significant ownership over service architecture, product API development, and data…
Added 2 hours ago
Data Engineer
TekStaff IT Solutions
Toronto, ON · Greater Toronto Area, Canada
Contract
…stability, strength, and long‑term vision of a global financial services…
Added 2 hours ago
SAP FICO Manager (ERP Transformation)
Tarkett Sports
Toronto, ON
Full-time
…Contrôle dans le cadre d’une transformation SAP S/4HANA Public Cloud déployée en plusieurs phases. Il s’agit d’un rôle concret, stratégique et très responsabilisant, relevant du directeur…
Added 2 hours ago
Amazon Connect Engineer
HRConnects
Toronto, ON
Full-time
Are you passionate about transforming customer support experiences through cloud-based contact center solutions? We’re seeking a skilled Amazon Connect Engineer to lead the design,…
Added 2 hours ago
SAP FICO Manager (ERP Transformation)
Tarkett Sports
Montreal, QC
Full-time
…Contrôle dans le cadre d’une transformation SAP S/4HANA Public Cloud déployée en plusieurs phases. Il s’agit d’un rôle concret, stratégique et très responsabilisant, relevant du directeur…
Added 2 hours ago
Lead Software Engineer (SAP ABAP)
Thomson Reuters
Toronto, ON · Canada, Toronto, Ontario
Full-time
Thomson Reuters is seeking an experienced Lead Software Development Engineer (SAP ABAP) to join our product development team, working on cutting-edge integrations between SAP ECC & S/4 HANA…
Added 2 hours ago
Senior Software Developer (Full stack)
Autodesk
Toronto, ON · Montreal, QC · AMER - Canada - Ontario - Toronto - University Ave
Full-time
Build and guide development of modern web experiences using technologies such as JavaScript, TypeScript, React, Node.js, REST/GraphQL APIs, cloud services, and CI/CD pipelines

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

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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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