Senior Software Developer Developer API

Source Code; Toronto; On-site; CAD 95,000 - 120,000; Full time

Job summary

A leading tech company in Toronto is looking for a Senior Software Developer specializing in API development. The role requires extensive experience in designing and building REST APIs, implementing microservices, and optimizing performance. Ideal candidates will have knowledge of Azure services, SQL relational databases, and best practices in API security. This position offers a one-year contract with the possibility of extensions and requires a strong ability to collaborate with junior developers and stakeholders.

Qualifications

• 8+ years of experience in software development focusing on APIs.
• Hands-on experience with RESTful API design and implementation.
• Expertise in microservices and cloud-based solutions.

Responsibilities

• Create and use APIs to translate functional specifications into working applications.
• Develop detailed specifications for RESTful APIs.
• Optimize APIs for performance and security.

Skills

REST APIs

Spring Integration

Microservice architecture

Azure Services

SQL

Tools

Java

Spring Boot

SQL Server

Oracle

Docker

Kubernetes

Job description

About the job RQ09885 - Sr. Software Developer - API

RQ09885 - Sr. Software Developer - API

On-site (During the duration of the assignment, you will be under the discretion of the Hiring Manager's requirements for the Project you are assigned to)

Contract 1 year, 2 possible extensions

Security Level: CRJMC

• A senior API Software Developer with 8+ years of experience will be responsible for creating and using APIs to translate functional specifications into working and tested applications. This includes developing detailed programming specifications, user interface designs, prototypes, writing and/or generating code, compiling data driven programs, conducting unit tests and debugging code.
• Detailed design and specification documents for RESTful APIs, including endpoints, request/response models, authentication, and error handling.
• Clean, scalable, and secure REST APIs built using Java and Spring Boot, adhering to best practices and company standards.
• Modular and decoupled microservices, designed and deployed independently, with clear inter-service communication protocols.
• Using APIs to develop application based on the business requirement to transform and route data.
• Comprehensive test coverage using tools like JUnit, Mockito, or Test Containers to ensure code reliability and prevent regressions.
• Efficient relational database schemas designed and implemented to support API data storage and retrieval.
• Profiled and optimized APIs for response time, memory usage, and throughput, ensuring high performance under load.
• Secure API calls with proper authentication (e.g., OAuth2, JWT), authorization, input validation, and protection against common vulnerabilities (OWASP).
• Dockized applications with configuration files, docker-compose scripts, and Kubernetes manifests (if applicable) for smooth deployment.
• Integrated monitoring (e.g., Prometheus, Grafana) and logging (e.g., ELK stack, Logstash, or Splunk) for operational visibility.
• Produce clear documentation for developed systems such as design, deployment instructions, and operational guides.
• Regular code reviews, feedback sessions, and mentorship to junior developers, ensuring code quality and knowledge sharing.
• Weekly or sprint-based status updates on development progress, blockers, and delivered functionalities.
• Timely resolution of production issues, regression fixes, and performance improvements based on user feedback and testing.
• Available for any on-call on weekend for production issues.

Must-haves:

• Extensive experience in designing, building, and consuming REST APIs, including experience with API documentation and testing.
• In-depth knowledge of integration patterns and best practices, including experience designing and building integration solutions using Spring Integration
• In-depth knowledge of microservice architecture and experience building scalable, highly available systems using various Azure Services.
• Hands-On experience in messaging queuing and event driven architecture.
• Experience with asynchronous communication, multi-threading.
• Knowledge on Integration with Oauth2, JWT, SAML, etc.
• Strong skills in SQL and experience working with relational databases, such as SQL Server, or Oracle.
• Knowledge of data transformation techniques, such as mapping and normalization, and experience using them in a Spring Integration context.

Nice-to-have:

• Knowledge and experience in Justice Business and System
• Experience with asynchronous communication, multi-threading.
• Ability to transform data between different formats (JSON, XML, CSV).