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Java Jobs in London, ON

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Java • london on

Last updated: 20 hours ago
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Senior Java Engineer

Senior Java Engineer

SuperAnnotateLondon, Ontario, CA
Remote
Full-time
As a Senior Java Engineer, you will work remotely on an hourly paid basis to review AI-generated Java code, architectural solutions, and technical explanations, as well as generate high-quality ref...Show moreLast updated: 20 hours ago
Software Developer III

Software Developer III

J.D. PowerLondon, ON, CA
Full-time
The Role : The Intermediate Software Developer contributes to all phases of the Software Development Lifecycle through the analysis, design, implementation, verification, and maintenance of software...Show moreLast updated: 30+ days ago
Deployment Clerk

Deployment Clerk

Sodexo Canada LtdLondon, Ontario, Canada
Full-time +1
Position : Deployment Clerk (Full Time).Location : Victoria Hospital London Ontario (On Site).Measles Mumps Rubella Varicella Hepatitis A and B Diphtheria Tetanus Polio TB Skin Tests - Steps 1 and 2)...Show moreLast updated: 30+ days ago
Stock Trader Job in London, ON | Part Time

Stock Trader Job in London, ON | Part Time

Maverick TradingLondon, ON, Canada
Part-time
Stock Trader Job at Maverick Trading.Maverick Trading, a 26-year old proprietary trading firm is looking to hire experienced and entry-level equity and equity and option traders.We are a global tea...Show moreLast updated: 30+ days ago
Senior DevOps Engineer : Cloud, CI / CD, Kubernetes & Security

Senior DevOps Engineer : Cloud, CI / CD, Kubernetes & Security

VitalEdge TechnologiesLondon, ON, CA
Full-time
A leading ERP software provider in Canada is seeking a Senior DevOps Engineer to design and maintain cloud infrastructure across Azure and hybrid environments. Responsibilities include managing CI / C...Show moreLast updated: 30+ days ago
  • Promoted
Senior DevOps Engineer

Senior DevOps Engineer

e-EMPHASYS TECHNOLOGIES INCLondon, ON, Canada
Full-time
We are a leading ERP software and solutions provider to dealers and rental companies of heavy equipment.We specialize in working with the construction, mining, forestry, material handling, and agri...Show moreLast updated: 30+ days ago
Senior Retail Software Engineer -.NET / Java

Senior Retail Software Engineer -.NET / Java

RedIron Technologies Inc.London, ON, CA
Full-time
A leading retail software provider in London, Ontario seeks experienced software developers to enhance core products and support client-specific implementations. Candidates should have over 5 years ...Show moreLast updated: 30+ days ago
Application Support Analyst

Application Support Analyst

Juventus ConsultingOntario
Full-time
We are looking for an Application Developer both Java and.The split would be 75% Java work and 25%.This is 1 year contract, work could be out of Toronto or Waterloo. The required candidate will be a...Show moreLast updated: 30+ days ago
Senior Software Engineer

Senior Software Engineer

CARFAXLondon, ON, CA
Full-time
Join Team CARFAX as Senior Software Engineer - Back End.Isn't it time you bragged about where you work? At CARFAX, we do, every day. We pride ourselves on being mission-focused on helping to grow a ...Show moreLast updated: 30+ days ago
JPC -1459 - Senior Software Engineer

JPC -1459 - Senior Software Engineer

ITS GlobalOntario
Full-time
Our client is looking for a Senior Software Engineer to join their team.The ideal candidate should have : .Has 8+ years of experience developing software, with a track record of successful production...Show moreLast updated: 30+ days ago
Intermediate Full-Stack Java Developer

Intermediate Full-Stack Java Developer

WinAirLondon, Ontario, Canada
Full-time
Reporting to the Development Manager the Intermediate Full-Stack Java Developer will be a proactive enthusiastic team member responsible for contributing to the development enhancement and maintena...Show moreLast updated: 19 days ago
Solutions Design IT Specialist (Java / Kafka / Dynatrace)

Solutions Design IT Specialist (Java / Kafka / Dynatrace)

The Toronto-Dominion Bank (Canada)London, Ontario
Full-time
Design ATM interface solutions that align with business requirements, ensuring secure and seamless authentication and authorization. Ensure design leverages existing reusable components, traces back...Show moreLast updated: 30+ days ago
Remote Multiplayer Animation Programmer

Remote Multiplayer Animation Programmer

Tactic StudiosLondon, ON, CA
Remote
Full-time
A game development studio in Ontario is looking for an experienced Animation Programmer to design and implement multiplayer animation code for an unannounced project. The successful applicant will b...Show moreLast updated: 3 days ago
  • Promoted
Senior Fullstack Developer

Senior Fullstack Developer

ZTRLondon, ON, Canada
Full-time
Join us in Advancing the Environmental Global Impact within the Rail Industry.ZTR is a leading global railway technology company that modernizes and digitally connects railway rolling stock to help...Show moreLast updated: 30+ days ago
Intermediate Programmer Analyst

Intermediate Programmer Analyst

Medavie Blue CrossON, CA
Full-time +1
What makes us a different kind of employer?.As a national health solutions partner, Medavie is committed to improving the wellbeing of Canadians — and in our digital-first culture, technology is ke...Show moreLast updated: 30+ days ago
Manager, Software Engineering (Continuous Integration)

Manager, Software Engineering (Continuous Integration)

AffirmLondon, ON, CA
Full-time
Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.Continuous Integration (C...Show moreLast updated: 30+ days ago
  • New!
Java Backend Developer

Java Backend Developer

AIFA SolutionsLondon, ON, CA
Full-time
Design, develop, and test different pieces of software & features throughout the development life cycle.Support and secure the platform’s architecture through the implementation of cybersecurity in...Show moreLast updated: 22 hours ago
Software Developer Insurance Rules

Software Developer Insurance Rules

Cognition+London, Ontario, Canada
Full-time +1
Cognition where we are dedicated to revolutionizing the insurance industry with cutting-edge digital solutions.Since 1996 we have been committed to understanding and addressing the unique business ...Show moreLast updated: 24 days ago
Software Developer - Insurance Rules

Software Developer - Insurance Rules

Cognition Communications LtdLondon, ON, CA
Full-time +1
Join our Dynamic and Passionate team at Cognition+, where we are dedicated to revolutionizing the insurance industry with cutting-edge digital solutions. Since 1996, we have been committed to unders...Show moreLast updated: 22 days ago
Senior Java Engineer

Senior Java Engineer

SuperAnnotateLondon, Ontario, CA
20 hours ago
Job type
  • Full-time
  • Remote
Job description

As a Senior Java Engineer, you will work remotely on an hourly paid basis to review AI-generated Java code, architectural solutions, and technical explanations, as well as generate high-quality reference implementations and reasoning steps. You will assess solutions for accuracy, clarity, and adherence to the prompt; identify errors in logic, performance, or design; fact-check technical information; write high-quality explanations and model solutions that demonstrate correct methods; and rate and compare multiple AI responses based on correctness and reasoning quality.

This fully remote, hourly paid contractor role is with SME Careers, a fast-growing AI data services company and subsidiary of SuperAnnotate that provides AI training data to many of the world’s largest AI companies and foundation model labs, where your Java expertise will directly help improve the world’s premier AI models.

Key Responsibilities :

  • Develop AI Training Content : Create detailed prompts in various topics and responses to guide AI learning, ensuring the models reflect a comprehensive understanding of diverse subjects.
  • Optimize AI Performance : Evaluate and rank AI responses to enhance the model's accuracy, fluency, and contextual relevance.
  • Ensure Model Integrity : Test AI models for potential inaccuracies or biases, validating their reliability across use cases.

Your Profile :

  • Bachelor’s degree or higher in Computer Science, Software Engineering, or a closely related technical field.
  • 5+ years of professional software engineering experience, with significant hands-on work in Java on production systems.
  • Deep understanding of core Java, concurrency primitives, and the Java Collections Framework.
  • Extensive experience building and maintaining backend services using Spring or Spring Boot, REST APIs, and microservice architectures.
  • Strong grasp of software design principles, system design, and performance optimization in distributed Java systems.
  • Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines.
  • Comfort working with modern engineering tooling such as Git, CI / CD pipelines, automated testing frameworks, and containerization technologies.
  • Demonstrated experience conducting thorough code reviews and providing structured, constructive feedback to other engineers.
  • Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus.
  • Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle issues in Java solutions.