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Junior Database Developer Jobs in Ontario (NOW HIRING)

Coach and mentor junior engineers on best practices of software engineering, leveraging AI to ... Experience with Relational Database Design and Implementation. * Interest in building CI/CD ...

Junior Cost Estimator Internship Location: Sudbury Schedule: Full-Time, Monday to Friday Term: 1 ... databases, and sales management systems, ensuring pricing, engineering changes, customer ...

... junior developers. The successful candidate will serve as a technical subject matter expert across ServiceNow development, ITSM, integrations, CMDB, and IT asset management capabilities, while ...

Experience mentoring and guiding Junior Data Engineers in previous roles * Strong Experience working with SQL and large data sets * Hands-on experience coding in Python would be a strong asset

Experience mentoring and guiding Junior Data Engineers in previous roles * Strong Experience working with SQL and large data sets * Hands-on experience coding in Python would be a strong asset

Software Developer

Toronto, ON · On-site

CA$97K - CA$100K/yr

Databases: MySQL, PostgreSQL, Snowflake * Cloud/DevOps: Docker, Linux, DigitalOcean, CI/CD ... Experience mentoring junior developers or interns. Perks: * Generous wellness program * Best-in-the ...

Performs technical/engineering tasks to define application databases for software subsystems ... Mentors more junior Signaling Engineers, coaching them on deliverables preparation and reviewing ...

Showing results 41-60

Junior Database Developer information

What is a junior database developer?

Junior Database Developers are entry-level professionals who assist in designing, developing, and maintaining databases for organizations. They work under the supervision of senior database developers or administrators, helping with tasks such as writing SQL queries, troubleshooting data issues, and supporting database updates. Their role is crucial for ensuring data integrity, optimizing performance, and supporting the data needs of various departments. Junior Database Developers often collaborate with software developers and IT teams to implement database solutions. This position is typically suited for recent graduates or individuals with some programming and database experience.

What skills and qualifications are needed to thrive as a junior database developer?

To thrive as a Junior Database Developer, you need a solid understanding of database concepts, SQL programming, and a relevant degree in computer science or a related field. Familiarity with database management systems like MySQL, SQL Server, or Oracle, as well as version control tools such as Git, is typically required. Strong analytical thinking, attention to detail, and effective communication skills help you troubleshoot issues and collaborate with team members. These skills and qualifications are crucial for building reliable databases, ensuring data integrity, and supporting organizational data needs.

What are the typical challenges a junior database developer might face when starting out?

As a Junior Database Developer, you may find it challenging to work with unfamiliar database management systems, optimize queries for performance, and understand complex data models. Adapting to a team environment, where you collaborate closely with senior developers, data analysts, and software engineers, is also common. Additionally, learning best practices for data security and consistency can be demanding, but overcoming these challenges provides valuable experience and growth opportunities.

What is the difference between Junior Database Developer vs Database Administrator?

AspectJunior Database DeveloperDatabase Administrator
Required CredentialsTypically a bachelor's degree in computer science or related field; some certifications like Microsoft SQL Server or Oracle are commonSimilar educational background; certifications like Oracle DBA, Microsoft Certified: Azure Database Administrator are often preferred
Work EnvironmentMostly involved in coding, designing, and developing databases; works closely with developers and analystsFocuses on maintaining, backing up, and securing databases; interacts with IT teams and end-users
Employer & Industry UsageUsed in software development companies, tech firms, and organizations with database needsCommon in large enterprises, financial institutions, and healthcare organizations requiring database management

While both roles require knowledge of database systems and similar certifications, Junior Database Developers primarily focus on creating and optimizing databases, whereas Database Administrators handle ongoing maintenance, security, and performance management.

What are the most commonly searched types of Database Developer jobs in Ontario?

The most popular types of Database Developer jobs in Ontario are:

What cities in Ontario are hiring for Junior Database Developer jobs?

Cities in Ontario with the most Junior Database Developer job openings:

Infographic showing various Junior Database Developer job openings in Ontario as of August 2026, with employment types broken down into 79% Full Time, 16% Part Time, and 5% Contract. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution.

Senior Java Developer - Vice President

Citi

Mississauga, ON • On-site

CA$170/hr

Full-time

This job post has expired 1 day ago. Applications are no longer accepted.


Citibank rating

8.4

Company rating: 8.4 out of 10

Based on 179 frontline employees who took The Breakroom Quiz

39th of 174 rated banks


Job description

This is a Senior Java Developer position responsible for leading the design, development, and deployment of scalable, high-performance enterprise applications. The overall objective of this role is to collaborate with cross-functional teams to deliver business requirements and mentor junior engineers.

Responsibilities: 

  • Take complete ownership of business initiatives from inception to production. Collaborate with product managers and business stakeholders to define scope, estimate effort, and identify technical dependencies. 

  • Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards 

  • Translate complex business requirements into scalable, resilient, and secure technical designs 

  • Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation 

  • Define, maintain, and promote robust architectural patterns, coding standards, and best practices for large-scale, high-throughput enterprise web applications. 

  • Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions 

  • Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary 

  • Conduct rigorous code reviews, mentor junior and mid-level developers, and foster a culture of continuous learning and technical excellence 

  • Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency. 

Qualifications: 

  • 10+ years of professional experience in software engineering and application development

  • Deep, authoritative knowledge of core Java, including multi-threading, concurrency, memory management, and performance tuning 

  • Extensive hands-on experience with Spring Framework and Spring Boot. 

  • Strong understanding of RESTful API design, microservices architecture, enterprise integration patterns and web application security risks. 

  • Strong proficiency in Oracle Database, including advanced SQL, PL/SQL development, query optimization, indexing strategies, and database schema design. 

  • Proven expertise in designing, deploying, and managing scalable microservices within containerized environments, with hands-on experience in orchestration platforms such as Red Hat OpenShift, AWS ECS, or Kubernetes.

  • Experience in implementing and managing distributed caching solutions such as Hazelcast or Redis to optimize application performance, manage session state, and reduce database load  

  • Ability to adjust priorities quickly as circumstances dictate 

  • Consistently demonstrates clear and concise written and verbal communication 

Education: 

  • Bachelor’s degree/University degree or equivalent experience 

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Job Family Group: Technology

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Job Family:Applications Development

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Time Type:Full time

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Primary Location Full Time Salary Range:$120 800,00 - $170 800,00

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Most Relevant Skills Please see the requirements listed above.

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Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.

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Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

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This job opening is for an existing job vacancy.

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

 

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.
View Citi’s EEO Policy Statement and the Know Your Rights poster.


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About Citigroup Inc

Sourced by ZipRecruiter

We live in an increasingly complex world. Companies these days are either born global or are going global at record speed. Business and geopolitics are forging an entirely new dynamic and consumers now expect financial services to be a seamless part of their digital lives. Citi is a bank that’s uniquely positioned for this moment. Through our vast global network and our on-the-ground expertise, we can connect the dots, anticipate change and empathize the needs of our clients and customers in ways that other banks simply cannot. Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress. We have set expectations for how we must act to bring our mission to life. These expectations are at the heart of our Leadership Principles – we take ownership, we deliver with pride and we succeed together.

Industry

Banking and credit intermediation

Company size

5,001 - 10,000 Employees

Headquarters location

New York City, NY, US