Software Developer - Senior

Joblinxsapp; Toronto; On-site; CAD 120,000 - 170,000; Full time

Job summary

Joblinxsapp is seeking a highly experienced Senior Software Developer to design, build, and maintain large-scale enterprise applications in Toronto. You will translate complex specifications into robust solutions, span the full SDLC, and support Oracle-based systems and modern web architectures.

The role requires deep hands-on Java and Oracle/SQL experience, strong REST APIs, microservices, and a philosophy of clean code, refactoring, and Agile practice. Ontario market, on-site collaboration.

Qualifications

• 10+ years of experience designing and developing large-scale web applications.
• 10+ years hands-on experience with Java + Oracle/SQL databases.
• 5+ years experience with REST APIs / RESTful Web Services.
• Strong experience in Microservices Architecture.
• Expertise in Object‑Oriented Programming, Design Patterns, Clean Code, Refactoring.
• Strong understanding of Agile methodologies.
• Experience with Azure DevOps.
• Oracle E‑Business Suite (EBS) modules: GL, AR, AP, Collections, Inventory.

Responsibilities

• Translate technical system specifications into scalable, high-quality applications.
• Develop detailed programming specifications and write efficient, maintainable code.
• Perform unit testing, debugging, and application support.
• Troubleshoot and resolve technical issues during development and post-deployment.
• Collaborate with cross-functional teams throughout SDLC.
• Design, develop, test, and document enterprise applications.
• Participate in design walkthroughs and technical discussions.
• Support implementation, migration, and system enhancements.
• Provide post-implementation support and documentation.

Skills

Java & Oracle/SQL

REST APIs

Microservices

OOP & Design Patterns

Clean Code & Refactoring

Agile methodologies

Azure DevOps

JWT/OAuth2/SSL

Relational/Hierarchical DBs

SQL tuning/partitioning

ETL/Data Warehousing

OBIEE

Oracle EBS

Tools

OBIEE

Oracle EBS

Job description

We are seeking a highly experienced Senior Software Developer to design, develop, and maintain large-scale enterprise applications. The role involves translating technical specifications into robust solutions, working across the full Software Development Life Cycle (SDLC), and supporting complex Oracle-based systems and modern web architectures.

Key Responsibilities

• Translate technical system specifications into scalable, high-quality applications
• Develop detailed programming specifications and write efficient, maintainable code
• Perform unit testing, debugging, and application support
• Troubleshoot and resolve technical issues during development and post-deployment
• Collaborate with cross-functional teams throughout SDLC
• Design, develop, test, and document enterprise applications
• Participate in design walkthroughs and technical discussions
• Support implementation, migration, and system enhancements
• Provide post-implementation support and documentation

Core Requirements (Must Have)

• 10+ years of experience in designing and developing large-scale web applications
• 10+ years of hands‑on experience with Java + Oracle/SQL databases
• 5+ years experience with REST APIs / RESTful Web Services
• Strong experience in Microservices Architecture
• Expertise in Object‑Oriented Programming, Design Patterns, Clean Code, Refactoring
• Strong understanding of Agile methodologies
• Experience with Azure DevOps

Technical Skills

• Security protocols: JWT, OAuth2.0, SSL Certificates
• Database expertise: Relational & hierarchical DBs, SQL tuning, partitioning
• Experience with query languages & information retrieval tools
• Knowledge of communication protocols & middleware/gateways
• Experience with Internet‑ready applications & RAD methodologies

Role Overview

We are seeking a highly experienced Senior Software Developer to design, develop, and maintain large-scale enterprise applications. The role involves translating technical specifications into robust solutions, working across the full Software Development Life Cycle (SDLC), and supporting complex Oracle-based systems and modern web architectures.

Key Responsibilities

• Translate technical system specifications into scalable, high-quality applications
• Develop detailed programming specifications and write efficient, maintainable code
• Perform unit testing, debugging, and application support
• Troubleshoot and resolve technical issues during development and post-deployment
• Collaborate with cross-functional teams throughout SDLC
• Design, develop, test, and document enterprise applications
• Participate in design walkthroughs and technical discussions
• Support implementation, migration, and system enhancements
• Provide post-implementation support and documentation

Core Requirements (Must Have)

• 10+ years of experience in designing and developing large-scale web applications
• 10+ years of hands‑on experience with Java + Oracle/SQL databases
• 5+ years experience with REST APIs / RESTful Web Services
• Strong experience in Microservices Architecture
• Expertise in Object‑Oriented Programming, Design Patterns, Clean Code, Refactoring
• Strong understanding of Agile methodologies
• Experience with Azure DevOps

Technical Skills

• Security protocols: JWT, OAuth2.0, SSL Certificates
• Database expertise: Relational & hierarchical DBs, SQL tuning, partitioning
• Experience with query languages & information retrieval tools
• Knowledge of communication protocols & middleware/gateways
• Experience with Internet‑ready applications & RAD methodologies

Requirements

Oracle‑Specific Expertise (Highly Preferred)

• Oracle E‑Business Suite (EBS) modules:
• GL, AR, AP, Collections, Inventory
• Strong programming skills in:
• PL/SQL, SQL, XML, Unix Shell Scripting, Oracle Data Integrator
• Experience with ETL, Data Warehousing, OBIEE
• Knowledge of Oracle ADF & Java integration
• Experience conducting impact assessments on Oracle customizations.

Soft Skills

• Strong verbal and written communication skills
• Excellent analytical and problem‑solving abilities
• Ability to work in fast‑paced, deadline‑driven environments
• Strong collaboration and stakeholder management skills
• Proven ability to work effectively within large teams

Nice to Have

• Experience working with Ontario Public Service (OPS) or public sector
• Knowledge of AODA (Accessibility for Ontarians with Disabilities Act)
• Experience with design walkthroughs & documentation