Longyin C.

Data & Analytics Engineer – Enterprise Analytics Platform Designed and delivered a production-grade data platform covering both data engineering reliability and analytics engineering usability. Built Python-based ETL pipelines integrating HR and customer support SaaS systems, transforming raw API data into trusted, analytics-ready datasets used for KPI tracking and executive decision-making. Key responsibilities and strengths: • Engineered robust, batch-based ETL pipelines with explicit incremental loading and checkpointing (timestamps, cursors) to ensure idempotency, auditability, and safe reprocessing • Solved complex API ingestion constraints (pagination, rate limits, non-incremental endpoints) using production-safe strategies • Designed modular ETL architecture (base classes, shared utilities) enabling scalability and maintainability • Modeled business-oriented analytical tables aligned with operational and executive KPIs • Ensured data quality through normalization, type enforcement, and UPSERT-based loading • Acted as a bridge between engineering and analytics by translating business questions into reliable data models • Delivered clear technical and executive documentation (architecture, design decisions, KPI-to-decision mapping) Impact: • Established a single source of truth for HR and customer support analytics • Reduced manual reporting and increased confidence in data-driven decisions • Enabled downstream BI tools without vendor lock-in Tech stack: Python · SQL · REST APIs · ETL Architecture · Incremental Loads · Data Modeling · Data Engineering · Analytics Engineering

# Extracted, analyzed, and interpreted data on marketing, product, and shop performance using Google BigQuery (SQL) to provide actionable insights. # Created dynamic and automated dashboards in Google Data Studio to visualize campaign performance, enabling real-time strategy adjustments. # Participated in brainstorming sessions with cross-functional teams, contributing ideas for advanced segmentation and predictive analytics methodologies.

Boosted marketing campaign impact for clients through application of analytical reports, covering competitor research, trends and industry performance while developing digital vision roadmaps. Champion online transformation; embed knowledge of digital marketing channels to ensure brand consistency. Key achievements # Gathered, analysed and assimilated data to present actionable insights, using tools including Google Analytics. # Authored on-trend content and delivered insights for event securing over 200k daily views and 50K+ likes and comments in just one day. # Analysed consumer data to segment and target specific markets through diverse channels. # Applied creative event marketing plans and digital campaigns to drive awareness. # Monitored and minimised digital marketing expenditure in line with a budget of €500k. # Reduced wage costs by €25k annually, having delineated and rationalised resource requirements. # Gained exposure to web analytics, campaign A/B testing, and metrics monitoring.

A fast-growing marketing and e-commerce start-up, recognized by AFP, BFM, and Figaro for its success. As a key member of the e-commerce team, I led data-driven initiatives to enhance the online user experience (UX) and optimize conversion rates across the website. One of my major contributions was leading the redesign of the product page, focusing on UX/UI optimization to improve user engagement, streamline navigation, and enhance product visibility. I utilized A/B testing and customer behavior analysis to make informed decisions that boosted performance. By collaborating closely with cross-functional teams, I ensured the product page design aligned with user needs, resulting in a more intuitive and visually appealing shopping experience. Key Achievements: #Led UX/UI optimization of the product page to improve user interaction, reduce bounce rates, and increase conversions, using web analytics and A/B testing to refine design elements based on data insights. #Realized a 10% user growth and 20% sales increase in one month through a targeted digital marketing strategy backed by comprehensive web performance analysis. #Improved sales speed by 15% by analyzing web traffic and customer data to identify trends, recommend new products, and tailor sales strategies accordingly. #Drove B2B revenue growth from zero to €100,000 in one month by analyzing market behavior and tailoring strategies to meet business needs. #Implemented solutions that reduced lost packages by 10% by leveraging data analytics to streamline the logistics and e-commerce process.

An fast growing international logistic and transportation company, who are a pioneer expert on the logistic and air transportation between China and France. Authored engaging content across marketing literature and social media channels for this international logistics and transportation company connecting China and Europe. Key achievements #Led A/B testing and UX/UI optimization for the FTL Express mobile app, improving user engagement and conversion rates by testing design variations and refining the user journey. Utilized data-driven insights to enhance the app's functionality and overall user experience. # Delivered 20% increase in users having analysed target customer behaviours to improve user experience (UX) across website and mobile application, culminating in consistently positive feedback. #Scoped and led digital campaigns for new website; grew followers to 1k daily in week one via creative SEO. # Achieved ten-fold increase in brand exposure having established and expanded Public Relations (PR) network. # Identified market-driven logistics needs and proposed new service solutions that became the company’s leading revenue stream, contributing approximately 45% of total revenue.

I was an intern in the vivid,and fast growing international company who is specialised on event production and management as well as on PR and marketing solutions. The skills I practiced included content production, business research, event planning, event management, supplier sourcing, proposal set-up.

Developed business plans, roadmap and marketing strategies to facilitate entry into China for this international education company with 1,000+ employees and 43 offices across four continents. Key achievements #Fostered, maintained and nurtured key internal / external relationships in support of business development. # Proactively monitored partner health and performance. # Negotiated, reviewed and amended mutually acceptable agreements.

Before JD.com founded, while Amazone era in China, The "2688" under Beijing Zip was one of hottest B2C E-commerce website in China. Key achievements # Managed end-to-end e-commerce processes – from procurement to supplier negotiations. # Orchestrated digital marketing, website back-end management and logistics. # Delivered 11x sales increase via contributions to creative marketing strategies aimed at optimising brand image.