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Added 2 mins ago
Full Stack Engineer, Central Processing and Management Information (CPMI)
HSBC Global Services Limited
Toronto, ON
…while working across the application stack and integrating with Java-based microservices and PostgreSQL. The platform is undergoing modernization to simplify the application landscape,…
Added 31 mins ago
V
Site Reliability Engineer
VySystems
Calgary, AB
- Full-time
We are seeking an experienced application developer or core application support professional to improve the reliability, performance, and supportability of core software applications. This…
Added 46 mins ago
D
Java Software Engineer
Dexian
Mississauga, ON
- Contract
We are seeking a highly skilled and passionate Senior Java Backend Developer to join our engineering team as a Senior Individual Contributor. In this role, you will be responsible for…
Added 46 mins ago
A
Java Developer - Mississauga, Canada (Hybrid)
Altimetrik
Mississauga, ON
- Full-time
Strong experience in Java, Spring Boot, and Microservices architecture
Added 46 mins ago
LT
Senior Dotnet Developer
Lorven Technologies Inc.
Mississauga, ON
- Contract
Design, and deliver highly scalable, fault-tolerant services and features across our microservices platform.
Added 1 hour ago
AI
Staff Engineer
Atlantis IT Group
Toronto, ON
- Contract
Strong backend development experience in Java or Python, including REST API and microservices
Added 1 hour ago
AI
Backend Java Developer
Apptoza Inc.
ON · Ontario, Canada
- Temporary
We are seeking 8-12 years experienced highly skilled Senior Backend Java Developer with strong expertise in Java, Spring Boot, Microservices, API Integration, Azure Cloud, and…
Added 1 hour ago
AI
Kafka Developer/ Engineer
Apptoza Inc.
Toronto, ON
- Contract
We are seeking a highly skilled Senior Kafka Developer to design, develop, and maintain large-scale event-driven and real-time data streaming solutions using Apache Kafka.
Added 1 hour ago
Senior Java Developer – Application Modernization
Capco
Toronto, ON
Capco is looking for a Senior Java Developer to join a major technology modernization initiative focused on upgrading business-critical legacy applications and their supporting technology.
Added 2 hours ago
AI
Full Stack Engineer
Apptoza Inc.
Toronto, ON
- Contract
Strong backend development experience in Java or Python, including REST API and microservices
Added 2 hours ago
JG
Senior Java Backend Developer - 8 Years
J2B Global LLC
Mississauga, ON
- Full-time
Looking for an experienced Java Developer to design and develop robust backend services for enterprise applications.
Added 2 hours ago
T
IAM (SailPoint) Software Engineer
Teamrecruiter.com
Ottawa, ON
- Contract
Automate IAM processes using scripting and programming languages such as Java, Python, JavaScript, or PowerShell.
Added 2 hours ago
RD
Full Stack Engineer
Randstad Digital
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Full Stack Developer & Senior Full Stack Developer (IoT & Cloud Solutions)
Added 3 hours ago
AI
Kafka Developer
Apptoza Inc.
Toronto, ON
- Contract
We are seeking a highly skilled Senior Kafka Developer to design, develop, and maintain large-scale event-driven and real-time data streaming solutions using Apache Kafka.
Added 3 hours ago
OS
Java Application Developer
Open Systems Technologies
Mississauga, ON
- Contract
Solid 10+ years of experience with Java development
Added 10 hours ago
A
Software Engineer - Apple, Inc.
Apple
Vancouver, BC
- Full-time
Architect and maintain backend microservices using Java and the Spring ecosystem (Spring Boot), integrating with distributed datastores and caching layers (Cassandra, Redis, Solr).
Added 14 hours ago
M
Senior Software Engineer - Card Network Integration
Marqeta
Remote, Canada
- Full-time
- Remote
Experience developing in Java and/or Python, however we welcome experience in other programming languages.
Added 15 hours ago
IF
Lead Full Stack Developer
iA Financial Group (Industrial Alliance)
Quebec, QC
- Full-time
Has experience with integration architectures, APIs, microservices, and event-driven solutions, particularly within an Azure Cloud, Azure DevOps Services, Kafka/Confluent Cloud, and…
Added 17 hours ago
TI
Senior Java Developer
Tecsys Inc.
Remote, Canada
- Remote
As a Senior Java Developer, you will join a team at the heart of the backend systems that power mission-critical supply chains in healthcare, retail, and complex distribution.
Added 18 hours ago
SG
Full-Stack Developer (Java, React, Openshift)
Software Guidance & Assistance, Inc. (SGA, Inc.)
Toronto, ON
- Full-time
Software Guidance & Assistance, Inc., (SGA), is searching for a Full stack Developer (Java, React, Openshift) for a contract assignment with one of our premier Financial Services clients in…
Added 18 hours ago
SG
V.I.E. Programmer Analyst
Societe Generale
Montreal, QC
- Full-time
Languages: Java, Spring Boot, Typescript (Angular), SQL, scripting languages.
Added 19 hours ago
SG
Java Spring Developer
Software Guidance & Assistance, Inc. (SGA, Inc.)
Mississauga, ON
- Full-time
Software Guidance & Assistance, Inc., (SGA), is searching for a Java Spring Developer for a contract assignment with one of our premier Financial Services clients in Mississauga, ON.
Added 19 hours ago
SI
Software Developer
Spait Infotech
Canada
- Full-time
Strong knowledge of at least one programming language such as Java, Python, C#, JavaScript, C++, or Go.
Added 19 hours ago
CI
Senior R&D Java Developer
Calian in Space & Technology
Montreal, QC
- Contract
Lead the technical design, development, and evolution of the product, focusing on scalable microservices architecture using Java and Spring Boot.
Added 19 hours ago
CG
Senior R&D Java Developer
Calian Group
Montreal, QC
- Full-time
Lead the technical design, development, and evolution of the product, focusing on scalable microservices architecture using Java and Spring Boot.

High Tech Genesis

G12 / BB Senior Software Engineer, Performance & Scale

Ottawa, ON, Canada

Contract

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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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