Maxime Lemaitre

As a senior data engineer at Believe, I contributed to the reliability, performance, and scalability of the data platform, ensuring trusted analytics and actionable insights for stakeholders across the organization. - Served as the primary owner for finance datasets, managing 30+ data sources and translating business requirements into reliable, analytics-ready models - Investigated and resolved a production issue affecting Spotify Discovery Mode data, restoring accuracy and stakeholder confidence - Enhanced the TikTok Virality / TuneCore Conversion Funnel pipeline, adding country-level insights and platform-specific dimensions - Identified and fixed 25+ data quality issues, improving accuracy, consistency, and trust in datasets - Suggested and implemented Snowflake optimizations, including query and model refactoring, incremental strategies, and improved warehouse usage, reducing compute waste and improving performance - Strengthened team delivery discipline by improving daily rituals and processes - Acted as a senior technical contributor in design reviews and architectural discussions Tech stack : AWS (lambda/step function/s3/batch), Snowflake, Terraform, Pulumi, Sqitch, Postgres, Gitlab, Docker

As a staff engineer at MadKudu, I was responsible for the data platform and the AWS cloud infrastructure. As a relay with the CTO and the product team, I have - Designed and built the MadKudu copilot data pipeline supporting more than 100+ Customers - Added several new data sources into MadKudu data platform, namely social signals, job changes, job opening and HG Insights data, adding more signals to Madkudu platform - Designed and initiated a data api allowing faster time to query data using motherduck and duckdb - Optimized the AWS cloud infrastructure costs, reducing monthly costs by 40% after two months - Maintained and improved the legacy lead scoring pipelines improving the accuracy and trust in the produced data, by fixing more than 500+ data issues in total - Managed AWS cloud infrastructure supporting 15+ applications, improving availability and reducing deployment times to minutes using Terraform and automated CI/CD pipelines - Designed and implemented a streaming ingestion pipeline for tracking analytics - Lead 4 T-shaped teams by managing roadmaps, milestones, team rituals, exchanges with product. Tech stack : aws, nodejs, redshift, athena, terraform, dbt, airflow, duckdb, postres, dlt, github, docker

Joined a rapidly growing sports betting company transitioning from startup to scale-up. Focused on improving platform reliability, scalability, and performance during major live sporting events. - Promoted performance-driven development through code audits, engineering workshops, and systematic incident post-mortems - Built and maintained a load testing platform, enabling stress testing of 10+ microservices ahead of each release - Led the Web Performance Optimization initiative, significantly reducing time to first paint and enhancing UX under peak load - Served as the main liaison between engineering, DBA, and SysOps teams to align infrastructure with application demands - Designed and implemented local and distributed caching strategies (e.g., Redis), reducing 99th percentile response times by up to 90% Tech Stack: .NET, JavaScript, MSSQL Server, Redis, Node.js, Xamarin, Angular, Microsoft Load Testing Framework

Worked as a consultant embedded in multiple teams across large organizations, providing expertise on performance optimization, database design, and legacy system modernization. - TF1 Publicité (12 months) – Maintained and enhanced the core application responsible for managing TV ad inventory across all TF1 channels - Sanofi (2 months) – Conducted a full audit and refactoring of the labeling system used across all pharmaceutical factories; work led to a long-term modernization initiative managed by SQLI - Amundi (15 months) – Contributed to the redesign of the asset management platform, improving maintainability and system performance. Tech Stack: .NET, Web Forms, WinForms, Oracle, MSSQL Server, VB6, SSIS, SSRS, Perforce

Joined a 15+ member engineering team as a junior developer in my first professional software role, gaining hands-on experience across diverse systems and technologies. - Maintained and modernized legacy .NET and PHP applications used by agricultural clients - Designed and led the implementation of new features across multiple services, improving user engagement - Owned the end-to-end notification system (email, SMS), enhancing communication reliability - Served as the technical point of contact for key French and Dutch customers, supporting onboarding and issue resolution - Delivered in-person technical training and presentations to end-users and senior stakeholders Tech Stack: .NET, Windows Mobile, MSSQL Server, JavaScript, PHP, Web technologies