Freelancer profile translated to English.
Back to original languageAbout Simon
I intervene as a Backend Tech Lead on SaaS and business tools where backend, data, and integrations become critical.
I help teams stabilize and evolve existing systems: business APIs, PostgreSQL/PostGIS databases, production jobs, imports/exports, backfills, workflows, external integrations, automations, and applied AI.
I am generally called upon when:
– a product already works but is becoming difficult to maintain
– the backend, jobs, or integrations are slowing down delivery
– business data is becoming central to the product
– data processing, imports, exports, or backfills need to be reliable
– PostgreSQL/PostGIS performance is becoming a product issue
– an AI prototype or automation needs to become a maintainable feature
– it's necessary to deliver quickly while reducing technical debt
Examples of interventions:
– taking over a critical SaaS backend
– structuring business APIs used by SaaS products
– making jobs, backfills, and production processing reliable with error recovery
– optimizing PostgreSQL/PostGIS queries on large volumes
– implementing production safeguards: CI, monitoring, consistency checks, and production verifications
– transforming AI prototypes into maintainable features: business data, APIs, workflows, permissions, logs, and supervision
I intervene both hands-on and in structuring: development, architecture, technical decisions, team standards, CI/CD, monitoring, error recovery, and developer support.
Specialization: B2B data-heavy SaaS, real estate, geospatial, PostgreSQL/PostGIS, public data, business APIs, B2B integrations, and operational workflows.
English
Fluent
French
Native or bilingual
Can work on-site
Paris (up to 10km)
Experience
- Gabarit - Vinci ImmobilierTech Lead Backend & Data PlatformREAL ESTATEJune 2023 - Today (3 years and 2 months)Paris, FranceIntervention as Backend & Data Platform Tech Lead on a real estate SaaS heavily dependent on business data.Responsibilities:– backend architecture and business APIs– structuring data models and PostgreSQL/PostGIS databases– ingestion and exploitation of multi-source data: public data, private data, external APIs– making jobs, imports, exports, backfills, and batch processing reliable– performance optimization for geospatial queries and complex data processing– implementing production safeguards: monitoring, error recovery, consistency checks, business verifications– industrializing AI prototypes into maintainable features: business data, APIs, workflows, permissions, logs, and supervision– technical decision-making, debt reduction, and team supportIntervention both hands-on and structuring: development, architectural choices, team standards, technical prioritization, and production reliability.Examples of achievements:– design of geospatial APIs for real estate products– structuring complex business databases around PostgreSQL/PostGIS– optimization of queries and processing on large volumes– making production jobs and backfills reliable with error recovery– industrializing critical data processing– implementing technical safeguards: monitoring, consistency checks, production verifications– supporting the team on backend, data, and platform choices
- City&You - Vinci ImmobilierTech Lead Backend Engineer / Real Estate SaaSREAL ESTATEMarch 2019 - May 2023 (4 years and 2 months)Paris, FranceLead backend Ruby on Rails on real estate SaaS products, with a strong business data component.Responsibilities:– backend development and business APIs– PostgreSQL database modeling and structuring– integration of external services and third-party APIs– data processing related to business workflows– improving maintainability and delivery quality– contribution to architectural choices and technical standardsCrucial experience bridging SaaS development, business backend, and technical structuring.
- meursault.techFreelance Backend Developer / Tech LeadSOFTWARE PUBLISHINGSeptember 2017 - Today (8 years and 11 months)Paris, FranceFreelance backend development missions on web and SaaS products.Interventions:– development of backend APIs and features– database modeling and structuring– integration of external services: payment, APIs, business tools– implementation of data processing: imports, transformations, synchronizations– improvement of existing databases: maintainability, performance, technical debt– contribution to technical choices on evolving productsInterventions on various projects in real estate, insurance, and e-learning.This period allowed me to consolidate a solid backend foundation: APIs, databases, integrations, data processing, and existing code refactoring.
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Education
- MSc Technology & ManagementEcole Centrale Paris2014MS Technologie & Management École Centrale Paris – 2014 Spécialisation en systèmes, data et innovation
- Master in Strategic Management (specialization Risks & Quality)Sciences Po Rennes2014