Systems Integration Developer

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Systems Integration DeveloperPosition OverviewThe Software Developer ( Systems Integration Developer) is responsible for designing, building, and maintaining integration flows between the SMS POS platform and third-party systems (ERP, eCommerce, BI, and others), ensuring reliable data exchange across retail operations. You contribute to the performance of the entire application stack, .NET, SQL, Sencha UI layer and internal scripts within an Agile team, ensuring robustness, efficiency, and scalability.
Key Responsibilities
Act as technical bridge between the POS team and third-party system stakeholders, translating business requirements into integration specifications.
Design and implement integration solutions between SMS POS and third-party systems (ERP, eCommerce, BI, and others), using APIs, middleware connectors, and file-based (EDI / flat file) exchanges.
Develop and maintain custom logic within the SMS POS application (including the Sencha ExtJS UI layer) to support integration touchpoints and operational workflows.
Investigate and resolve integration incidents in production, working closely with infrastructure, third-party vendors, and retail operations teams.
Produce and maintain integration technical documentation: data mappings, sequence diagrams, API contracts, and operational runbooks.
Contribute to internal projects focused on designing and building reusable integration layers, shared middleware components, and common API gateway patterns used across systems.
Develop and maintain internal integration libraries, connectors, and adapters that standardize how retail systems communicate, reducing duplication across integration projects.
Required Skills & Qualifications
Strong understanding of SQL, stored procedures, triggers, and relational databases.
Degree in Computer Science or related field.
Bilingual in French and English (written and spoken).
5+ years of software development experience.
Preferred Qualifications
Familiarity with .NET (C#) and REST APIs, Experience with modern JS frameworks.
Experience or willingness to learn Sencha Ext JS.
Personal Attributes
Curious, adaptable, and collaborative.
Comfortably operating in environments where legacy constraints coexist with modern ambitions. Adjust priorities, approaches, and tooling to match project realities without losing sight of quality or long-term goals.
Picks up new technologies, platforms, and integration patterns quickly and independently. Does not wait to be taught;
seeks out documentation, prototypes, and peer knowledge to get up to speed fast.
Able to anticipate where technologies are heading and help the team navigate transitions, from legacy systems toward modern platforms, by sharing knowledge, proposing migration paths.
Actively interested in how AI and automation tools can improve integration workflows, developer productivity, and data quality. Willing to experiment with AI-assisted development or intelligent monitoring.
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