
Orion Charlier developed and maintained core waste management workflows for the MTES-MCT/trackdechets repository, delivering robust backend and frontend features that improved data integrity, observability, and operational reliability. He engineered resilient data import and validation pipelines, enhanced registry and BSDA form handling, and implemented secure file uploads and session management. Orion’s work included optimizing CI/CD pipelines, introducing Node.js runtime metrics, and refining Kubernetes deployments for better security and monitoring. Using TypeScript, GraphQL, and PostgreSQL, he addressed complex data modeling and validation challenges, ensuring scalable, maintainable systems. His contributions demonstrated depth in backend architecture, DevOps, and user-focused UI/UX improvements.

February 2026 — MTES-MCT/trackdechets monthly summary focusing on delivered features, observability improvements, and security hygiene, with emphasis on business value and technical outcomes.
February 2026 — MTES-MCT/trackdechets monthly summary focusing on delivered features, observability improvements, and security hygiene, with emphasis on business value and technical outcomes.
January 2026: The MTES-MCT/trackdechets team delivered core features to improve data integrity and operability, strengthened security, and streamlined deployment. Notable deliverables include Waste Upcycling Tracking with mandatory destination parcel data and validation; expanded observability with Node.js runtime metrics and PostgreSQL pool metrics; UI header responsiveness enhancements; Docker-based deployment improvements with image publishing and environment variable renames; and restoration of XSS sanitization in API responses. Together, these changes reduce risk, improve monitoring and deployability, and deliver measurable business value through safer data handling, better performance insight, and faster release cycles.
January 2026: The MTES-MCT/trackdechets team delivered core features to improve data integrity and operability, strengthened security, and streamlined deployment. Notable deliverables include Waste Upcycling Tracking with mandatory destination parcel data and validation; expanded observability with Node.js runtime metrics and PostgreSQL pool metrics; UI header responsiveness enhancements; Docker-based deployment improvements with image publishing and environment variable renames; and restoration of XSS sanitization in API responses. Together, these changes reduce risk, improve monitoring and deployability, and deliver measurable business value through safer data handling, better performance insight, and faster release cycles.
December 2025 monthly summary for MTES-MCT/trackdechets: Key features delivered across the registry and transport workflows include (1) Operation Modes Management and Validation: consolidated operation mode handling across registers, updated operation code validation, and replacement of deprecated retrieval logic with a format-capable version to ensure deterministic mode resolution. Commits: 25881ee7068278e84f76715172a98d2f17803c21; f7a7f414de06263d5f13d0605a6c12692ec737f7; 9d3435e10bb4858185c4fc542cc170ffa381a976. (2) BSDA Form Enhancements and Validation: legacy compatibility, destination updates validation, and clearer error messaging improving user submission flow. Commits: 1c3a3ba7595c723083468fc913085bdbe83c8097; 125dea160cde72a1277f9853faad34790190b1b9; 6b38303e9508d910bcb10f07b4a1e73689858fe6; f592e1ddb576164a5b91e58d07b3045c8266daa4; 07d8715b0cf8031355db1b60e14f06941e58d38a; f22c0c193e61dadcf40f89f66e87414d280ef697. (3) Waste Weight Tracking Enhancement: added destinationReceptionWeightIsEstimate flag for accurate tracking across registries. Commit: 633507bca1460d5bdc36dd0a169f66e96af5df2b. (4) Multimodal Transporter Signing Correction: fixed transporter signature handling for multimodal transport; mutation updated to apply the correct signer based on current transporter state. Commit: c8a80df3e98e7348a3b001ed255c7604beb7781b. (5) Error Handling and Logging Improvements: enhanced GraphQL/import error handling and added Sentry logging for better diagnostics. Commits: 3820e5eb6318f6c4ae4467e2468b6d94a8b1c07d; 6721cf1ad77da879e38eac35ae00039629a9d5a0; 03f9d692a5e71b3f2648819f88d47f9c29d1627e.
December 2025 monthly summary for MTES-MCT/trackdechets: Key features delivered across the registry and transport workflows include (1) Operation Modes Management and Validation: consolidated operation mode handling across registers, updated operation code validation, and replacement of deprecated retrieval logic with a format-capable version to ensure deterministic mode resolution. Commits: 25881ee7068278e84f76715172a98d2f17803c21; f7a7f414de06263d5f13d0605a6c12692ec737f7; 9d3435e10bb4858185c4fc542cc170ffa381a976. (2) BSDA Form Enhancements and Validation: legacy compatibility, destination updates validation, and clearer error messaging improving user submission flow. Commits: 1c3a3ba7595c723083468fc913085bdbe83c8097; 125dea160cde72a1277f9853faad34790190b1b9; 6b38303e9508d910bcb10f07b4a1e73689858fe6; f592e1ddb576164a5b91e58d07b3045c8266daa4; 07d8715b0cf8031355db1b60e14f06941e58d38a; f22c0c193e61dadcf40f89f66e87414d280ef697. (3) Waste Weight Tracking Enhancement: added destinationReceptionWeightIsEstimate flag for accurate tracking across registries. Commit: 633507bca1460d5bdc36dd0a169f66e96af5df2b. (4) Multimodal Transporter Signing Correction: fixed transporter signature handling for multimodal transport; mutation updated to apply the correct signer based on current transporter state. Commit: c8a80df3e98e7348a3b001ed255c7604beb7781b. (5) Error Handling and Logging Improvements: enhanced GraphQL/import error handling and added Sentry logging for better diagnostics. Commits: 3820e5eb6318f6c4ae4467e2468b6d94a8b1c07d; 6721cf1ad77da879e38eac35ae00039629a9d5a0; 03f9d692a5e71b3f2648819f88d47f9c29d1627e.
Monthly summary for MTES-MCT/trackdechets (2025-11): Key features delivered, major bugs fixed, impact, and technologies demonstrated. Key features delivered include BSDA Weight Estimation and PDF Enhancements; User Session Security: Invalidate Old Sessions on Password Change; Data Integrity: Restrict Updating Emitter Type for Grouped Forms; PDF Upload Validation: Allow Only PDF Files; Static Asset Caching for Performance. Major bugs fixed: Waste Consistency: Require Description for OTHER Type. Overall impact: improved data integrity, security, and performance, enabling more reliable waste management workflows and faster user experiences. Technologies/skills demonstrated: data model updates, UI/UX improvements, security hardening, file type validation and MIME handling, PDF generation enhancements, and web performance optimizations (caching headers).
Monthly summary for MTES-MCT/trackdechets (2025-11): Key features delivered, major bugs fixed, impact, and technologies demonstrated. Key features delivered include BSDA Weight Estimation and PDF Enhancements; User Session Security: Invalidate Old Sessions on Password Change; Data Integrity: Restrict Updating Emitter Type for Grouped Forms; PDF Upload Validation: Allow Only PDF Files; Static Asset Caching for Performance. Major bugs fixed: Waste Consistency: Require Description for OTHER Type. Overall impact: improved data integrity, security, and performance, enabling more reliable waste management workflows and faster user experiences. Technologies/skills demonstrated: data model updates, UI/UX improvements, security hardening, file type validation and MIME handling, PDF generation enhancements, and web performance optimizations (caching headers).
MTES-MCT/trackdechets – October 2025: Delivered a focused set of data integrity, validation, UI clarity, and auditing improvements that strengthen business value and operational reliability. Key outcomes include preserving the original form creation date in the markAsResealed mutation with an integration test for legacy conversion; BSDA waste consistency display enhancement via a dedicated getWasteConsistenceLabel mapping to present clearer UI text; standardized and expanded input constraints across validation schemas to improve data quality; registry race-condition fixes and a Prisma upgrade to v6.17 with related migrations and import fixes; and comprehensive company lifecycle auditing implemented through transactional creation/deletion logging and update of the user’s first association date. These changes reduce legacy-conversion risk, prevent data integrity issues, enhance user experience, and improve traceability and compliance across the system.
MTES-MCT/trackdechets – October 2025: Delivered a focused set of data integrity, validation, UI clarity, and auditing improvements that strengthen business value and operational reliability. Key outcomes include preserving the original form creation date in the markAsResealed mutation with an integration test for legacy conversion; BSDA waste consistency display enhancement via a dedicated getWasteConsistenceLabel mapping to present clearer UI text; standardized and expanded input constraints across validation schemas to improve data quality; registry race-condition fixes and a Prisma upgrade to v6.17 with related migrations and import fixes; and comprehensive company lifecycle auditing implemented through transactional creation/deletion logging and update of the user’s first association date. These changes reduce legacy-conversion risk, prevent data integrity issues, enhance user experience, and improve traceability and compliance across the system.
September 2025: Core data quality and reliability initiatives for MTES-MCT/trackdechets. Key features delivered include BSDA data integrity improvements, observability enhancements, and UI/communication polish. Major bugs fixed, contributing to higher system reliability, better data trust, and improved user communications. Demonstrated strong software engineering practices in data correctness, observability, and user experience to deliver business value and scalable operations.
September 2025: Core data quality and reliability initiatives for MTES-MCT/trackdechets. Key features delivered include BSDA data integrity improvements, observability enhancements, and UI/communication polish. Major bugs fixed, contributing to higher system reliability, better data trust, and improved user communications. Demonstrated strong software engineering practices in data correctness, observability, and user experience to deliver business value and scalable operations.
Month: 2025-08 — MTES-MCT/trackdechets delivered a focused set of features, data integrity improvements, and infrastructure upgrades that strengthen data governance, operational efficiency, and observability. The work aligns with business value by reducing invalid entries, enabling better reporting, and stabilizing the tech stack for future scales.
Month: 2025-08 — MTES-MCT/trackdechets delivered a focused set of features, data integrity improvements, and infrastructure upgrades that strengthen data governance, operational efficiency, and observability. The work aligns with business value by reducing invalid entries, enabling better reporting, and stabilizing the tech stack for future scales.
July 2025 performance summary for MTES-MCT/trackdechets: Delivered security, data integrity, and UX improvements alongside expanded capabilities for permission-based UI, advanced code selection, and document handling. Implemented User Permissions Management via a GraphQL query permissionsInfos to tailor UI and navigation across organizations. Introduced Waste Code Selection Enhancements with a multi-select WasteCodeSelector and filtered export modal. Extended parcel number validation to support 4-digit first segments and alphanumeric second segments. Strengthened security posture with Policy and CSP updates, including stronger passwords, refreshed session handling, and improved return URL handling. Enabled Link Analysis Files to TEXS Declarations for uploading and associating PDF analysis files through new mutations/queries and frontend changes.
July 2025 performance summary for MTES-MCT/trackdechets: Delivered security, data integrity, and UX improvements alongside expanded capabilities for permission-based UI, advanced code selection, and document handling. Implemented User Permissions Management via a GraphQL query permissionsInfos to tailor UI and navigation across organizations. Introduced Waste Code Selection Enhancements with a multi-select WasteCodeSelector and filtered export modal. Extended parcel number validation to support 4-digit first segments and alphanumeric second segments. Strengthened security posture with Policy and CSP updates, including stronger passwords, refreshed session handling, and improved return URL handling. Enabled Link Analysis Files to TEXS Declarations for uploading and associating PDF analysis files through new mutations/queries and frontend changes.
June 2025 for MTES-MCT/trackdechets focused on increasing reliability, data integrity, and observability across critical data workflows, while delivering UX improvements and security hardening. Key outcomes include safer Elasticsearch indexing with optimistic concurrency, robust form processing lifecycle, and a new S3 import error analysis tool; enhanced observability to support faster triage; UI refinements for company import and country selector; and multiple robustness and cleanup efforts that reduce risk and improve maintainability. These changes translate into safer data operations, improved issue detection, and a stronger foundation for future features.
June 2025 for MTES-MCT/trackdechets focused on increasing reliability, data integrity, and observability across critical data workflows, while delivering UX improvements and security hardening. Key outcomes include safer Elasticsearch indexing with optimistic concurrency, robust form processing lifecycle, and a new S3 import error analysis tool; enhanced observability to support faster triage; UI refinements for company import and country selector; and multiple robustness and cleanup efforts that reduce risk and improve maintainability. These changes translate into safer data operations, improved issue detection, and a stronger foundation for future features.
May 2025 focused on delivering core registry enhancements, strengthening data quality, and improving observability to accelerate issue diagnosis and rollout safety for MTES-MCT/trackdechets. Key features delivered include: Registry UI and Import Enhancements — a consolidated registry UI, a new Transported registry form, input validations, and import workflow improvements, along with cleanup of feature flags and build configuration; Company data handling and import validation improvements — enhanced data fetching and display, bulk import validation, and better handling of anonymous/closed companies with improved UTF-8 and header validation; Observability and logging improvements — more robust error logging, differentiated error types, and tracing for import operations to speed debugging and reliability. Major bug fixes targeted reliability and performance, including improved visibility of import errors in logs, hotfixes for the importer flow after signature, Excel UTF-8 validation fixes, and bundle/code-splitting optimizations. These changes collectively reduce import failures, improve data quality, and enable safer registry rollouts, delivering measurable business value and stronger developer productivity.
May 2025 focused on delivering core registry enhancements, strengthening data quality, and improving observability to accelerate issue diagnosis and rollout safety for MTES-MCT/trackdechets. Key features delivered include: Registry UI and Import Enhancements — a consolidated registry UI, a new Transported registry form, input validations, and import workflow improvements, along with cleanup of feature flags and build configuration; Company data handling and import validation improvements — enhanced data fetching and display, bulk import validation, and better handling of anonymous/closed companies with improved UTF-8 and header validation; Observability and logging improvements — more robust error logging, differentiated error types, and tracing for import operations to speed debugging and reliability. Major bug fixes targeted reliability and performance, including improved visibility of import errors in logs, hotfixes for the importer flow after signature, Excel UTF-8 validation fixes, and bundle/code-splitting optimizations. These changes collectively reduce import failures, improve data quality, and enable safer registry rollouts, delivering measurable business value and stronger developer productivity.
April 2025 monthly summary for MTES-MCT/trackdechets focusing on delivering key features, stabilizing data governance, and improving observability and UX. The period emphasized targeted data collection, schema standardization, and robust auditing, enabling better analytics, faster debugging, and stronger accessibility of generated artifacts.
April 2025 monthly summary for MTES-MCT/trackdechets focusing on delivering key features, stabilizing data governance, and improving observability and UX. The period emphasized targeted data collection, schema standardization, and robust auditing, enabling better analytics, faster debugging, and stronger accessibility of generated artifacts.
Concise monthly summary for MTES-MCT/trackdechets (March 2025): Delivered robust registry capabilities and data quality improvements through a set of targeted features and reliability fixes, driving reliability, regulatory compliance, and developer velocity. Key achievements: - Implemented Secure Registry File Upload via Presigned POST with size constraints, enabling robust, serverless-backed uploads and reducing failed registry entries. Commit: 53626e16deb97bd46e33ca9982d5c392e15001f7. - Enhanced Registry Import Analytics and Reliability: added import/change aggregates, improved API statistics, attribution fixes, and more robust CSV imports for accurate compliance reporting and business analytics. Commits include 1b57063a10c35a81c7ee2c6de118b98552817054, 389cc6d2b40ef74ef1ff5cde62ee81b57ab4c8e7, f703eca3fd6a83b313fe486e910cae98c8b1c32d, 346cc9d696dda2055a0a5aec18cd6e9bb95d8904, 9763d9b93e84b63abd8d2a018986f7dc7f9aa20b. - Expanded Registry Operation Codes and Validation: introduced D 9 F and R 1 operation codes with parsing and validation checks to ensure correct waste handling workflows. Commits: 641809589d5344fbbaf2911ae6b3dd9b99bbb028, 21fd093200ac352e1bb757131a201c5e416c621f. - Rolled out SSD Declarations Form Builder for Registry: new dynamic form builder with backend query resolvers for SSD registry entries, improving creation, viewing, and management. Commit: 8c81d91ce344f55a972e1a33ecc6562660210657. - Registry Data Model Cleanup and Upsert Improvements: cleaned up legacy fields, added company type enum, optimized upsert lookups, and improved waste danger determination with updated tests, strengthening data integrity and performance. Commits: 3b57cb2e4e04eb9ad27a4ff055530f7daba4de41, 5f9c80b2090b94841c9168f62f66b9e86c4ccb2e. Additional reliability work: - Telemetry/OpenTelemetry configuration hotfix to stabilize telemetry data pipeline (memory limiter, batch sizes, and timeouts). Commit: 15bc55b8f714b447eb471fe768113aa6b1295525. Impact and value: - Improved reliability and performance of registry uploads and data processing, reducing operational risk and manual reconciliation time. - Stronger analytics and reporting capabilities for product and business teams, enabling data-driven decisions around registry management and compliance. - Streamlined data model and lookup performance, decreasing latency for registry operations and facilitating future feature work. - Demonstrated breadth of skills across backend, API design, data modeling, frontend form UX, and observability tooling (OpenTelemetry).
Concise monthly summary for MTES-MCT/trackdechets (March 2025): Delivered robust registry capabilities and data quality improvements through a set of targeted features and reliability fixes, driving reliability, regulatory compliance, and developer velocity. Key achievements: - Implemented Secure Registry File Upload via Presigned POST with size constraints, enabling robust, serverless-backed uploads and reducing failed registry entries. Commit: 53626e16deb97bd46e33ca9982d5c392e15001f7. - Enhanced Registry Import Analytics and Reliability: added import/change aggregates, improved API statistics, attribution fixes, and more robust CSV imports for accurate compliance reporting and business analytics. Commits include 1b57063a10c35a81c7ee2c6de118b98552817054, 389cc6d2b40ef74ef1ff5cde62ee81b57ab4c8e7, f703eca3fd6a83b313fe486e910cae98c8b1c32d, 346cc9d696dda2055a0a5aec18cd6e9bb95d8904, 9763d9b93e84b63abd8d2a018986f7dc7f9aa20b. - Expanded Registry Operation Codes and Validation: introduced D 9 F and R 1 operation codes with parsing and validation checks to ensure correct waste handling workflows. Commits: 641809589d5344fbbaf2911ae6b3dd9b99bbb028, 21fd093200ac352e1bb757131a201c5e416c621f. - Rolled out SSD Declarations Form Builder for Registry: new dynamic form builder with backend query resolvers for SSD registry entries, improving creation, viewing, and management. Commit: 8c81d91ce344f55a972e1a33ecc6562660210657. - Registry Data Model Cleanup and Upsert Improvements: cleaned up legacy fields, added company type enum, optimized upsert lookups, and improved waste danger determination with updated tests, strengthening data integrity and performance. Commits: 3b57cb2e4e04eb9ad27a4ff055530f7daba4de41, 5f9c80b2090b94841c9168f62f66b9e86c4ccb2e. Additional reliability work: - Telemetry/OpenTelemetry configuration hotfix to stabilize telemetry data pipeline (memory limiter, batch sizes, and timeouts). Commit: 15bc55b8f714b447eb471fe768113aa6b1295525. Impact and value: - Improved reliability and performance of registry uploads and data processing, reducing operational risk and manual reconciliation time. - Stronger analytics and reporting capabilities for product and business teams, enabling data-driven decisions around registry management and compliance. - Streamlined data model and lookup performance, decreasing latency for registry operations and facilitating future feature work. - Demonstrated breadth of skills across backend, API design, data modeling, frontend form UX, and observability tooling (OpenTelemetry).
February 2025 — MTES-MCT/trackdechets: Major registry capability refresh delivering data integrity, usability, and reliability. Implemented robust import validation with enhanced error reporting and UI for import statistics, standardized registry URL/navigation, and expanded registry management via new GraphQL mutations/resolvers with tests. These changes reduce import errors, improve auditability, and enable safer, scalable handling and transport of waste registries. Demonstrated strong data modeling, API design, and UI/UX improvements.
February 2025 — MTES-MCT/trackdechets: Major registry capability refresh delivering data integrity, usability, and reliability. Implemented robust import validation with enhanced error reporting and UI for import statistics, standardized registry URL/navigation, and expanded registry management via new GraphQL mutations/resolvers with tests. These changes reduce import errors, improve auditability, and enable safer, scalable handling and transport of waste registries. Demonstrated strong data modeling, API design, and UI/UX improvements.
January 2025 monthly summary for MTES-MCT/trackdechets focused on reliability and data integrity in data ingestion and waste-tracking workflows. Delivered robust Data Import Script with improved environment variable handling (TD_XSLX2CSV_PATH), clearer error messages for invalid paths, and correct directory navigation during import. Also delivered Registry System Enhancements with Outgoing TEXS, including stronger data validation, improved error handling, and database schema updates to support reliable tracking of waste movements. Implemented a missing migration to ensure deployments stay in sync with schema changes. Overall impact: reduced import failures, improved data quality, and readiness for outbound TEXS features, enabling more accurate reporting and smoother user operations. Technologies and skills demonstrated include Bash scripting robustness, environment variable management, comprehensive error handling, data validation, and SQL/database migrations with schema evolution.
January 2025 monthly summary for MTES-MCT/trackdechets focused on reliability and data integrity in data ingestion and waste-tracking workflows. Delivered robust Data Import Script with improved environment variable handling (TD_XSLX2CSV_PATH), clearer error messages for invalid paths, and correct directory navigation during import. Also delivered Registry System Enhancements with Outgoing TEXS, including stronger data validation, improved error handling, and database schema updates to support reliable tracking of waste movements. Implemented a missing migration to ensure deployments stay in sync with schema changes. Overall impact: reduced import failures, improved data quality, and readiness for outbound TEXS features, enabling more accurate reporting and smoother user operations. Technologies and skills demonstrated include Bash scripting robustness, environment variable management, comprehensive error handling, data validation, and SQL/database migrations with schema evolution.
December 2024 — MTES-MCT/trackdechets: Delivered observability enhancements, Prisma upgrade, and CI/DevOps improvements with concrete migrations and tests, driving reliability and faster feedback. Implemented service name derivation from the root folder and default OpenTelemetry service version for consistent reporting; completed Prisma v6 upgrade with necessary validators and migrations including many-to-many relations and a dedicated SQL migration to emitPickupSiteName; enhanced CI reliability and test coverage for registry mutations with validation improvements; and resolved a merge conflict during integration to preserve branch stability with no code changes. Business impact includes improved issue diagnosis, more robust deployments, and better data-quality signals.
December 2024 — MTES-MCT/trackdechets: Delivered observability enhancements, Prisma upgrade, and CI/DevOps improvements with concrete migrations and tests, driving reliability and faster feedback. Implemented service name derivation from the root folder and default OpenTelemetry service version for consistent reporting; completed Prisma v6 upgrade with necessary validators and migrations including many-to-many relations and a dedicated SQL migration to emitPickupSiteName; enhanced CI reliability and test coverage for registry mutations with validation improvements; and resolved a merge conflict during integration to preserve branch stability with no code changes. Business impact includes improved issue diagnosis, more robust deployments, and better data-quality signals.
Month: 2024-11 — MTES-MCT/trackdechets delivered a focused set of backend, observability, and CI/CD improvements that improve data quality, release reliability, and developer visibility. The work emphasizes business value through robust data ingestion, reliable deployments, and clearer performance signals across the Waste data import workflow and PR tooling.
Month: 2024-11 — MTES-MCT/trackdechets delivered a focused set of backend, observability, and CI/CD improvements that improve data quality, release reliability, and developer visibility. The work emphasizes business value through robust data ingestion, reliable deployments, and clearer performance signals across the Waste data import workflow and PR tooling.
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