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Added 2 hours ago
PH
Intermediate Software Developer
Propel Holdings
Toronto, ON
- Full-time
5-7 years of hands-on experience as a software developer (Java + Spring Boot + Hibernate/JPA + REST)
Added 2 hours ago
N
Senior Frontend Developer
nesto
Canada
- Full-time
Extensive experience with Typescript, React ecosystem (Next.js is a plus), and modern state management libraries.
Added 4 hours ago
PW
HSE Manager
Precision Well Servicing
Red Deer, AB
- Full-time
This role is required to react to change productively and to undertake other tasks as assigned
Added 5 hours ago
PG
Full Stack Engineer I
Paymentus Group Inc
Richmond Hill, ON
- Full-time
…payment solutions, and is looking for an experienced full-stack developer to join our cross-functional team building a FinTech solution tailored for the SMB market. You will contribute to…
Added 7 hours ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Added 7 hours ago
V
Cloud Engineer
Vertage
Ottawa, ON · Kanata, ON
- Contract
Added 7 hours ago
SM
Solutions Designer – Senior - RQ11671
S M Software Solutions Inc
Toronto, ON
- Internship
Java/React as the technology stack for the public-facing online portal.
Added 7 hours ago
SM
Solutions Designer – Senior - RQ11671
S M Software Solutions Inc
Toronto, ON
- Internship
Java/React as the technology stack for the public-facing online portal.
Added 7 hours ago
SM
Solutions Designer – Senior - RQ11671
S M Software Solutions Inc
Toronto, ON
- Internship
Java/React as the technology stack for the public-facing online portal.
Added 7 hours ago
EG
Software Development Engineer I
Expedia Group
Vancouver, BC · Canada - British Columbia - Vancouver
- Full-time
Look for opportunities to simplify existing code, improve developer experience, and share knowledge with the team.
Added 8 hours ago
M
Director of Engineering - Mortgage Creditor Insurance
Manulife
Toronto, ON · Waterloo, ON
- Full-time
Languages such as React, NodeJS, AKS and Azure platform
Added 9 hours ago
M
Manager Engineering
Manulife
Toronto, ON · Waterloo, ON
- Full-time
Awareness of modern technology stacks and platforms, including Node.js, React, C#, .NET, Azure, MongoDB/Cosmos DB, REST APIs, Mainframe technologies, Windows/SQL Server, Java, Apache…
Added 9 hours ago
J
Frontend Engineer
Jobright.ai
Canada
- Full-time
Exposure to React, Vue, Angular, or another component-based framework
Added 11 hours ago
A
Software Engineer, AI & Engineering Productivity Tools
AMD
Markham, ON
- $128,000 to $192,000 USD / year
- Full-time
…production-quality software, automating workflows, and improving developer…
Added 11 hours ago
T
Senior Full Stack Developer (12 Months Maternity Contract)
Tangerine
Toronto, ON
- Full-time
We are looking for a Senior Full Stack Developer who is passionate about building high quality software across both backend and frontend stacks, and who enjoys working end to end - from API…
Added 11 hours ago
A
Cloud Software Engineer
Actalent
Ottawa, ON · Kanata, ON
- $46 to $65 CAD / hour
- Contract
The Software Developer will support the design, development, testing, and deployment of the Telemetry & Observability Platform (TOP). This enterprise platform integrates vehicle telemetry,…
Added 12 hours ago
WT
Senior Software Developer (Front End), Trading
Wealthsimple Technologies
Remote, Canada
- $151,200 to $189,000 CAD / year
- Full-time
- Remote
Strong frontend fundamentals with React and TypeScript, and ideally React Native - you build performant, reliable client experiences and understand how they behave under real-world…
Added 13 hours ago
A
CSS Team Lead
Aon
Toronto, ON
- Full-time
Thriving in a fast-paced, result-driven environment that requires colleagues to multi-task, react quickly and perform tasks that are not routine
Added 13 hours ago
A
Resource Manager
Aon
Toronto, ON
- Full-time
Successfully operates in a fast-paced output driven environment that requires staff members to multi-task, react quickly and perform task that are not routine.
Added 13 hours ago
E
Full stack Developer (Canadian Only)
Emaww
Remote, Canada
- $30,000 to $50,000 CAD / year
- Full-time
- Remote
Added 13 hours ago
Q-
Montréal [Hybrid] - C#/.Net Developer
QUANTEAM - North America (RAINBOW PARTNERS Group)
Montreal, QC · Greater Montreal Metropolitan Area
- Full-time
We are looking for a .Net Developer for one of our clients, an investment bank based in Montreal.
Added 15 hours ago
PS
Shopify Technical Lead
Publicis Sapient
Toronto, ON
- $140,000 to $160,000 CAD / year
- Full-time
Must be a Technical Lead rather than just a Senior Developer.
Added 15 hours ago
Full Stack Engineer, Revenue
Stripe
Canada
…of Stripe users, regardless of whether they’re an end user, developer, or…
Added 15 hours ago
M
Lead Developer
MarkupMarvel
Ottawa, ON
- Full-time
MarkupMarvel is hiring a Lead Developer to take technical ownership across our client projects. You’ll work hands-on with headless WordPress, Next.js, Laravel, and Shopify - architecting…
Added 15 hours ago
CD
Technical Lead / Architect – AI-Driven Development & Power Platform
Cloud Data Vision
Calgary, AB
- $70 to $80 CAD / hour
- Contract
The ideal candidate will have experience across React/Next.js, Amazon Bedrock, AWS, Power Platform, API development, and Solution Architecture.

High Tech Genesis

G12 / BB Senior Software Engineer, Performance & Scale

Ottawa, ON, Canada

Contract

Apply About employer

Applications open in a new tab.

Job details

Job type: Contract
Apply by: Nov 1, 2026
Posting language: English
Posted: Oct 2, 2026

Original job description

We are hiring a Senior Software Engineer, Performance & Scale for an opportunity with one of our technology clients.

The engineer will join a team working on highly complex, massively scaled software systems, with a strong focus on performance, scalability, reliability, distributed systems, microservices architecture, and automation.

This role is suited to an experienced software engineer who has worked on systems operating at significant scale and is comfortable diagnosing complex performance issues, improving system efficiency, developing automation, and troubleshooting distributed production environments.

The role may involve working across technologies including Go, Python, Ruby on Rails, and React, depending on the area of the platform and project requirements.

Key Responsibilities

Design, develop, and optimize highly scalable software systems and services.
Work on complex distributed systems operating at massive scale.
Analyze system and application performance to identify bottlenecks and opportunities for optimization.
Design, develop, and maintain microservices and distributed architectures.
Improve system latency, throughput, scalability, reliability, and resource utilization.
Investigate and triage complex production issues across highly distributed environments.
Perform root-cause analysis and develop sustainable solutions to recurring system and performance issues.
Develop automation for testing, diagnostics, monitoring, deployment, and operational workflows.
Build tooling and frameworks that improve system observability, diagnostics, performance, and engineering efficiency.
Collaborate with engineering teams on architectural decisions involving scalability, distributed systems, and performance.
Work across application code, backend services, APIs, infrastructure, and engineering tooling as required.
Participate in code reviews, design reviews, testing, debugging, and production support.
Identify opportunities to improve engineering processes through automation and technical innovation.

Required Qualifications

Strong professional experience in software engineering.
Hands-on experience designing, developing, and supporting large-scale distributed systems.
Strong experience with performance engineering, scalability, and system reliability.
Experience working with microservices architectures.
Experience troubleshooting and triaging complex issues in highly scaled production environments.
Strong programming experience in one or more languages such as Go, Python, Ruby, Java, C++, or similar.
Experience with automation, scripting, and engineering tooling.
Strong understanding of concepts including latency, throughput, concurrency, fault tolerance, scalability, and reliability.
Experience working with APIs, service-to-service communication, and distributed application architectures.
Strong debugging, analytical, and problem-solving skills.
Ability to work effectively across complex technical environments and engineering teams.

Technical Environment

Experience with several of the following technologies and concepts is valuable:

Programming Languages: Go, Python, Ruby, Java, C++, or similar
Web / Application Frameworks: Ruby on Rails, React, and modern web application frameworks
Architecture: Microservices, distributed systems, service-oriented architectures
Containers & Orchestration: Docker, Kubernetes
Cloud & Infrastructure: AWS, Azure, GCP, or comparable environments
APIs & Services: REST APIs, service-to-service communication, distributed services
Databases: Relational and NoSQL databases
Messaging & Streaming: Kafka, RabbitMQ, or similar technologies
Caching: Redis, Memcached, or similar technologies
Observability: Prometheus, Grafana, OpenTelemetry, ELK/EFK, or comparable platforms
Performance Engineering: Profiling, benchmarking, load testing, capacity planning, performance optimization
Automation & CI/CD: Jenkins, GitHub Actions, GitLab CI, or similar tools
Version Control: Git

Preferred Qualifications

Experience engineering and supporting systems at massive scale.
Experience with high-throughput and low-latency systems.
Strong experience with performance profiling and optimization of distributed applications.
Experience with Go and/or Python in large-scale systems.
Experience with Ruby on Rails and/or React in full-stack application environments.
Experience with Kubernetes and containerized microservices.
Experience with cloud-native architectures and distributed infrastructure.
Experience with observability, monitoring, and distributed tracing.
Experience investigating production incidents and performing root-cause analysis.
Experience developing automation, internal tooling, and engineering frameworks.
Familiarity with reliability engineering and performance testing practices.
Experience working in an Agile software development environment.

What You'll Bring

We are looking for a senior engineer who is comfortable solving complex performance, scalability, reliability, and distributed-systems challenges at massive scale.

You should be able to work across application code, services, APIs, infrastructure, and engineering tooling to understand how systems behave under significant scale and load.

Strong analytical skills, hands-on debugging experience, programming expertise, and the ability to develop automation and tooling are important for this role.

Apply About employer

More about this job

Responsibilities

Design, develop, and optimize large-scale distributed systems and microservices, improving performance, scalability, latency, throughput, and reliability. Diagnose production issues, perform root-cause analysis, and build automation, tooling, and observability capabilities in collaboration with engineering teams.

Requirements

Requires substantial software engineering experience, including hands-on work designing and supporting large-scale distributed systems, microservices, and performance- and reliability-focused applications. Candidates should have strong programming, debugging, automation, and analytical skills, with experience troubleshooting complex production environments.

Skills

Distributed Systems
Performance Engineering
Scalability
System Reliability
Microservices
Go
Python
Ruby
Java
C++
Automation
Troubleshooting
Root-Cause Analysis
Kubernetes
Observability
Performance Optimization

Visa sponsorship

Not detected in the job text

Keywords

Go
Python
Ruby
Ruby On Rails
React
Java
C++
Microservices
Distributed Systems
Performance Engineering
Scalability
Reliability Engineering
Docker
Kubernetes
AWS
Azure
GCP
REST APIs
Relational Databases
NoSQL Databases
Kafka
RabbitMQ
Redis
Memcached
Prometheus
Grafana
OpenTelemetry
ELK/EFK
CI/CD
Git

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