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Java developer Jobs in London, ON

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Java developer • london on

Last updated: 1 day ago
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: 1 day 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
Firmware Developer

Firmware Developer

Trudell Medical InternationalLondon, ON, CA
Full-time
Trudell Medical International Inc.Baransway Drive, London, Ontario, Canada.Posted Tuesday, December 2, 2025 at 5 : 00 AM. At Trudell Medical International (TMI), we pride ourselves on our passion for ...Show moreLast updated: 10 days ago
Student, Software Developer

Student, Software Developer

General Dynamics Land Systems–CanadaLondon, ON, CA
Full-time
We are looking for someone to join our software development team who can contribute to the development of high quality software solutions for the family of Light Armoured Vehicles and who is willin...Show moreLast updated: 10 days ago
Senior Backend Developer

Senior Backend Developer

ZTR Control SystemsLondon, ON, CA
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
Data Warehouse Developer

Data Warehouse Developer

STACK IT RecruitmentLondon, ON, CA
Full-time +1
This range is provided by STACK IT Recruitment.Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Are you passionate about designing powerful data ...Show moreLast updated: 14 days ago
Software Developer

Software Developer

ITPS (Canada) LTDLondon, Ontario, Canada
Full-time
A truly unique opportunity awaits one that is unmatched anywhere else.Whether you are early in your career and ready to take the right first step or an experienced professional seeking a role that...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
Software Developer

Software Developer

LYNKED Inc.London, ON, CA
Full-time
Location : London, ON (in-office).LYNKED is at the forefront of providing innovative technology solutions that drive efficiency and sustainability. With a diverse product portfolio that includes smar...Show moreLast updated: 27 days ago
Software Developer

Software Developer

RedIron Technologies Inc.London, ON, CA
Full-time
We are a retail systems integrator and software provider that helps you design, implement, integrate, and maintain any major retail software platform — legacy or cutting edge.At RedIron, we come to...Show moreLast updated: 30+ days ago
  • Promoted
Student, Software Developer

Student, Software Developer

General Dynamics Land SystemsLondon, ON, Canada
Full-time
Please indicate in the "specific source" field on your application where you met us! Include the name and / or location of the Hiring Event or Career Fair you attended.We are looking for so...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
Developer Software III Drupal

Developer Software III Drupal

Canadian Blood Services Stem Cells for LifeLondon, Ontario, Canada
Full-time
Please note this role will work in a hybrid environment.The successful candidate must be located near a Canadian Blood Services site and will be working a mixture of on-site and off-site work based...Show moreLast updated: 30+ days ago
  • Promoted
Intermediate Full-Stack Java Developer

Intermediate Full-Stack Java Developer

WinAirLondon, ON, Canada
Full-time
In the mid-1980s, WinAir’s founders, Bert and Helen Vergeer, recognized the inefficiencies in aviation maintenance, which relied heavily on paper-based processes. Their vision led to the devel...Show moreLast updated: 30+ days ago
  • Promoted
Senior Backend Developer

Senior Backend 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
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
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: 1 day 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: 25 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: 23 days ago
People also ask
Senior Java Engineer

Senior Java Engineer

SuperAnnotateLondon, Ontario, CA
1 day 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.