Software engineer jobs in Mississauga, ON and nearby

Within 25 km

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Added 3 months ago
CO
Senior Staff Software Engineer
Capital One
Toronto, ON
- Full-time
161 Bay Street (93021), Canada, Toronto,Toronto, Ontario,Senior Staff Software Engineer
Added 3 months ago
C
Software Engineer – Margin Technology - Officer
Citi
Mississauga, ON
- Full-time
As Software Engineer in our global technology team, you will be working with a group of passionate engineers who build technical solutions to complex business problems. You will have an…
Added 2 months ago
Software Engineer, Wallet
Robinhood
Toronto, ON
This role is based in our Toronto, ON office(s), with in-person attendance expected at least 3 days per week
Added 3 months ago
G
Software Engineer, Full Stack
Gigi
Toronto, ON
- Full-time
We're hiring an AI Builder - a full stack software engineer - to join our engineering team in Toronto and own end-to-end feature development for Gigi, our AI agent.
Added 4 months ago
PI
Backend Engineer
Princeton IT Services, Inc
Toronto, Ontario
- Full-time
Job Title: Backend Engineer Python (API & Platform Engineering)
Added 2 months ago
Staff Software Engineer, Product Risk
Stripe
Toronto, ON
Added 3 months ago
Senior Principal Site Reliability Engineer
Questrade Financial Group
Toronto, ON
Work-life balance in a hybrid environment with at least 3 days in office
Added 3 months ago
E
Senior Software Engineer
Equinix
Toronto, ON
- Full-time
6+ years of enterprise software engineering experience, with at least 5+ years focused on Salesforce and Marketing Technology platforms
Added 4 months ago
K
Software Architect
Knowledgehook
Toronto, Ontario
- $190,000 to $220,000 CAD / year
- Full-time
We are seeking a seasoned Software Architect to lead our platform's technical evolution across its entire lifecycle - spanning cloud infrastructure, database management, and the core C#…
Added 4 months ago
BC
Senior Cloud Engineer - Google Cloud Platform (GCP)
BDO Canada
Toronto, Ontario
- Full-time
BDO Digital is looking for a Senior GCP Cloud Engineer to join their growing team. The individual will own the following responsibilities:
Added 6 months ago
B
Software Engineer, Product / Mobile
Bree
Toronto, Ontario
- Full-time
Added 3 months ago
Forward Deployed Agile Software Engineer
TribalScale
Toronto, ON
TribalScale is looking for a Forward Deployed Engineer to work at the intersection of software engineering, artificial intelligence, product development, and client delivery.
Added 3 months ago
J
Senior Software Engineer, Applied AI (Netherlands)
Justworks
Toronto, ON
- €143,000 to €184,000 EUR / year
We are seeking a Senior Software Engineer with a strong passion for building AI-native systems in a product environment. The ideal candidate will be able to take ownership of large segments…
Added 3 months ago
Senior Software Engineer, Applied AI (Spain)
Justworks
Toronto, ON
We are seeking a Senior Software Engineer with a strong passion for building AI-native systems in a product environment. The ideal candidate will be able to take ownership of large segments…
Added 4 months ago
F
Senior Software Engineer - Applied AI
Feathery
Toronto, Ontario
- $90,000 to $140,000 CAD / year
- Full-time
To keep pace with that ambition, we're looking for a Full Stack Engineer to join the AI team and own these capabilities end-to-end.
Added 4 months ago
C
Senior Software Engineer
Clutch
Toronto, Ontario
- $160,000 to $200,000 CAD / year
- Full-time
Clutch is seeking a Software Engineer (Full-Stack / Backend / Frontend) to help build and scale our technology platform. You will write clean, reliable code, design scalable architectures,…
Added 4 months ago
C
Staff Software Engineer
Clutch
Toronto, Ontario
- $205,000 CAD / year
- Full-time
Clutch is seeking a Staff Software Engineer / Engineering Lead to drive technical excellence, deliver complex solutions, and shape the future of our platform. This role requires leadership…
Added 4 months ago
K
Software Engineer II, AI
Klue
Toronto, Ontario
- $115,000 to $149,000 CAD / year
- Full-time
We're looking for a Software Engineer, AI to join our team in Toronto, focusing on building and optimizing state-of-the-art LLM-powered agents that can reason, plan and automate workflows…
Added 3 months ago
GS
Software Engineer (Python) - PricingCenter
Guidewire Software
Toronto, ON · Mississauga, ON
- Full-time
In this role, you will be a product‑focused Python engineer who owns features end‑to‑end - from exploring requirements through to production reliability. You’ll help shape new pricing and…
Added 2 months ago
Staff Software Engineer, Time and Scheduling
Gusto, Inc.
Toronto, ON
As a Staff Software Engineer for the Time / Scheduling product team, you'll operate across the full product lifecycle: shaping features from early spec and design through to launch and…
Added 2 months ago
Staff Software Engineer, Quality & Reliability Platform
BuildOps
Toronto, ON
BuildOps is looking for a Staff Software Engineer to set and drive our company-wide technical strategy for building, shipping, and operating reliable software.
Added 4 months ago
M
Senior Software Engineer
Magical
Toronto, Ontario
- Full-time
As a Senior Engineer at Magical, you'll build and own the systems powering our AI agents. You'll set technical direction for projects, drive delivery, enhance your team’s effectiveness, and…
Added 4 months ago
AS
Associate Software Engineer / Software Engineer
Applied Systems Canada
Toronto, Ontario
- Full-time
Epic Engineering is building robust, scalable software solutions as we continue to improve system quality, accelerate delivery, and ensure maintainability across the ecosystem. We’re hiring…
Added 3 months ago
C
Senior / Staff Software Engineer – Core Data Infrastructure
Calliere
Toronto, ON
- Full-time
Engineer robust storage solutions capable of handling rapidly expanding volumes of time-series and spatial data without compromising on query performance.
Added 2 months ago
C
Senior / Staff Backend Engineer – Core Platform
Calliere
Toronto, ON
- Full-time
Engineer fault-tolerant integration layers that reliably ingest, normalize, and process unpredictable data from a wide variety of third-party vendors.

Justworks

Senior Software Engineer, Applied AI (Spain)

Toronto, ON, Canada

The base wage range for this position based in Spain is 111,000-143,000 EUR.

Apply on boards.greenhouse.io About employer

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Job details

Pay: The base wage range for this position based in Spain is 111,000-143,000 EUR.
Experience: 5+ years of backend engineering experience building and operating production systems
Posting language: English
Posted: Aug 13, 2026

Original job description

Who We Are

At Justworks, you’ll enjoy a welcoming and casual environment, great benefits, wellness program offerings, company retreats, and the ability to interact with and learn from leaders in the startup community. We work hard and care about our most prized asset - our people.

We’re helping businesses get off the ground by enabling them to focus on running their business. We solve HR issues. We’re data-driven and never stop iterating. If you’d like to work in a supportive, entrepreneurial environment, are interested in building something meaningful and having fun while doing it, we’d love to hear from you.

We're united by shared goals and shared motivations at Justworks. These are best summed up in our company values, which are reflected in our product and in our team.

Our Values

If this sounds like you, you’ll fit right in.

Who You Are

You are self-driven and like to work with others to remove roadblocks. You are curious and love to explore and learn new technologies. You have demonstrated the ability to build, deploy, and maintain large-scale, complex applications. You care more about solutions and impacting the customer experience than using a particular tool or framework.

About the role:

You will join a small, highly autonomous cross-functional team to build AI agents that fundamentally transform how operations work at scale. Instead of writing bespoke software for every workflow, we are developing an agent platform that can read operational knowledge, reason about it in context, and execute tasks end-to-end. This approach allows us to scale complexity through knowledge and reasoning, rather than simply through code.

This is an opportunity to join a foundational team, which currently consists of fewer than five engineers. The work spans critical areas including LLM-powered agent design, robust backend service architecture, tool and integration development, and sophisticated knowledge infrastructure.

We are seeking a Senior Software Engineer with a strong passion for building AI-native systems in a product environment. The ideal candidate will be able to take ownership of large segments of the technology stack, make pragmatic technical decisions in ambiguous and emerging territory, and consistently ship high-quality, production-ready systems that our users rely on every day.

Responsibilities:

Design, build, and own core components of the agent platform, from the orchestration layer to the tool integrations connecting it to internal systems.
Build and evolve the capabilities layer: APIs, data access patterns, and service integrations for agents to execute operational workflows.
Architect the knowledge and memory infrastructure, allowing agents to retrieve the data and act across our systems.
Design and implement the trust and safety framework, including audit trails, human-in-the-loop controls, and guardrails for safe and auditable AI-driven operations.
Contribute to agent evaluation and testing infrastructure, defining how we measure accuracy, reliability, and regression across agent behaviors.
Partner directly with Operations to understand workflows, identify automation opportunities, and translate process knowledge into agent capabilities.
Mentor other engineers on the team as it grows.

About the candidate

You are comfortable in a fast-paced, early-stage environment. You demonstrate a "scrappy" and resourceful approach, proactively identifying solutions and unblocking yourself without needing a fully defined path.
You are pragmatic and balance quality with speed. You understand when to optimize for long-term durability and when to iterate quickly. You prioritize pragmatism over being overly precious about code, but never compromise on quality in a way that creates future issues.
You are product-minded. You look beyond the immediate task, seeking to understand the "why" behind the build and questioning whether it's the right product solution. You are comfortable contributing product thinking alongside engineering work.
You demonstrate a strong ownership mindset. You are proactive, identify gaps, and drive initiatives to completion without waiting for explicit instructions. When encountering issues or ambiguity, you address them directly.
You possess strong backend engineering fundamentals. You can confidently design, build, and operate production systems.
You are curious and eager to develop expertise in AI and LLMs. While deep research is not required, you are motivated to build practical, real-world products using these tools, specifically focusing on agent systems.

Qualifications

5+ years of backend engineering experience building and operating production systems
Hands-on experience with LLMs and AI agents (orchestration, RAG, tool/function calling, or similar)
Strong API design and system integration skills
Product-minded: questions requirements and contributes to product decisions, not just execution
Proven ownership of complex projects in ambiguous, early-stage environments

Technologies Used

Golang, Ruby on Rails, Javascript, Java, C#, Python, VueJS, MySQL, Kafka, AWS, Git, Memcache, Redis, ElasticSearch, Docker, Terraform, Kubernetes, CircleCI, DataDog

The base wage range for this position based in Spain is 111,000-143,000 EUR.

Actual compensation is based on multiple factors that are unique to each candidate, including and not limited to skill set, level of relevant experience, and specific work location. Salary ranges for positions based in other locations may differ based on the cost of labor in that location.

For more information about Justworks’ Total Reward Philosophy, including all of the perks and benefits we are proud to offer our team members, please visit Total Rewards @ Justworks.

Diversity At Justworks

Justworks is committed to maintaining a workplace where diversity of identity, culture, and life experience is the norm and is celebrated authentically and respected consistently. Diversity in our work, our people, and our product drives creativity and innovation, entrepreneurial leadership and integrity, competitiveness, and collaboration throughout our business and in the market. We depend on our differences to make our team stronger, our workplace more dynamic, and our product accessible to all of our customers.

We’re proud to be an equal opportunity employer open to all qualified applicants regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital or familial status, disability, pregnancy, gender identity or expression, veteran status, genetic information, or any other legally protected status. Justworks is fully dedicated to providing necessary support to candidates with disabilities who may require reasonable accommodations. We also provide reasonable accommodations to employees based on their sincerely held religious beliefs, as well as for other covered reasons consistent with applicable federal, state, and local laws. If you're in need of a reasonable accommodation, please reach out to us at accommodations@justworks.com. Your comfort and success matter to us, and we're here to ensure an inclusive experience.

Our DEIB Report

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More about this job

Responsibilities

Design, build, and own core components of the AI agent platform, including orchestration layers and tool integrations. Architect robust knowledge and memory infrastructure while implementing trust, safety, and evaluation frameworks for AI-driven operations.

Requirements

Requires 5+ years of backend engineering experience with a focus on building and operating production-ready systems. Candidates must have hands-on experience with LLMs, AI agents, and strong API design skills in an early-stage environment.

Skills

Golang
Ruby on Rails
Python
LLMs
AI agents
Backend engineering
API design
System integration
RAG
Orchestration
Kubernetes
AWS
Docker
Terraform
Data architecture
Product-minded

Benefits

Wellness program
Company retreats

Visa sponsorship

Not detected in the job text

Keywords

Golang
Ruby on Rails
Javascript
Java
C#
Python
VueJS
MySQL
Kafka
AWS
Git
Memcache
Redis
ElasticSearch
Docker
Terraform
Kubernetes
CircleCI
DataDog
LLMs
AI Agents
RAG
Orchestration
Backend Engineering
API Design
System Integration
Cloud Infrastructure
Product-minded
Software Engineering
Artificial Intelligence

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Software engineer jobs in Mississauga, ON and nearby

Senior Staff Software Engineer

Software Engineer – Margin Technology - Officer

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Staff Software Engineer, Product Risk

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