Data Engineer

ABOUT US

lemlist is the sales engagement platform that gives sales teams the unfair advantage they deserve.

Bootstrapped since day one, we’ve grown from 0 to $57M ARR in 8 years, without raising a single dollar.

Today, we’re a profitable B2B SaaS company, trusted by 40,000+ sales teams worldwide to book more meetings and close more deals.

We’re looking for a Data engineer to join our team. You will help design, build and improve scalable data platform to provide data solution to our product.

YOUR MAIN MISSION WILL BE:

– Work collaboratively with the product and business teams to build scalable and agile solutions.

– Define our technical standards and take an active part in the structuring data platform architecture decisions and data platform deployment based on data strategic product roadmap

– Develop, deploy, and manage highly efficient data platform and automated data pipelines using cloud-based and on-premise technologies.

– Design, maintain, and enhance key data product feature to ensure they are high-quality, certified, and easily accessible/integrable by enterprise users, components, and systems.

– Analyze and develop data operations and pipelines in line with enterprise guidelines and best practices (e.g., data quality processes, governance, and deep catalog/glossary curation).

– Continuously adapt to evolving requirements by maintaining and improving existing data pipelines integrating new features and change requests using an agile approach.

– Ensure data quality, lineage, versioning, and observability across the whole stack.

– Support CI/CD and release processes

KEY RESULTS

Within 3 months, you will have/be:

– Successfully onboarded and integrated into the team.

– Onboarded our existing data platform end to end: sources, ingestion jobs, warehouse models, orchestration, BI layer, and who consumes what.

– Delivered a written audit of the current stack — what works, what’s fragile, what’s redundant, what’s undocumented — with a severity ranking and estimated cost of each gap (reliability, cloud spend, engineering time, business risk).

– Shipped at least one visible quick win: a broken or unreliable pipeline fixed, a cost anomaly resolved, or a critical dataset made trustworthy.

– Turned the audit into an agreed technical roadmap: proposed target architecture, tech choices (warehouse, streaming, orchestration, transformation), and a migration path with trade-offs made explicit and validated with Product, Data and the C-suite.

– Improved our data engineering standards: repo structure, Git workflow, CI/CD for data, environments, code review, and deployment process. New pipelines follow them without needing to be told.

Within 12 months, you will have:

– Participated actively in the improvement of our data platform in order to scale with data volume and product growth without recurring firefighting, and cost per pipeline is understood and controlled.

– Cut incident volume and time-to-detect on critical datasets to a level where business teams trust the data by default.

– Put observability in place: freshness, volume and schema checks with real alerting on our critical datasets, plus documented SLAs and clear ownership.

– Unlocked new use cases the business couldn’t previously ask for: proposed and shipped platform capabilities that opened up work in product analytics, in-product data features, or ML/AI enablement for the Data Scientist

– Become an additional reference on our data architecture — the person the C-suite (CEO, CPO, CMO, Head of Sales) and Product consult before committing to decisions with a data dependency.

WHAT’S IN IT FOR YOU?

– Work in a profitable, bootstrapped, and high-growth company that doesn’t rely on external funding to live.

– Work on high-impact projects with highly skilled data profiles composed of a Senior Analytics Eng, a Senior Data Scientist and a Senior Data Engineer that directly drive business decisions

– Collaborate directly with the C-suite on strategic topics

– Work with a team obsessed with speed, growth, and impact.

PREFERRED EXPERIENCE

Must have:

– Master’s degree in computer science, distributed systems, data engineering, engineering or equivalent.

– 5+ years experience in intensive data platform in the context of Big Data and cloud infrastructures / platforms

– Strong background in Big Data architecture approaches and DBMS/Data Warehouse modelling, optimisation, and management.

– Deep knowledge of SQL, Python and Spark-related programming languages is a must.

– Experience with data warehouses and lakes (BigQuery, Snowflake, Databricks, Storage, Delta lake…).

– Extensive expertise in data preparation, integration, modelling, and governance processes.

– Proven experience in designing and managing end-to-end production ready solutions.

– Solid experience in developing, optimising and maintaining scalable data ingestion and transformation pipelines using modern data technologies – including streaming tools (Pub/Sub, Kafka).

– Familiarity with DataOps know-how: Git, Docker, CI/CD practices (Jenkins) and deployment workflows in a data engineering environment

– Experience in ensuring data quality, consistency and performance across data platforms, while applying data governance principles.

– Strong analytical mindset, with the ability to solve complex data challenges and continuously improve data solutions.

– Fast learner, High ownership, structure, and execution speed. Demonstrated ability to thrive in a demanding, fast-growing environment.

– Fluent in French and English.

Nice to have:

– Hands on experience on applicative database such as NoSQL DBMS, Search DBMS, OLAP DBMS

– You have a first experience in B2B SaaS

ADDITIONAL INFORMATION

– Competitive salary and company bonus (up to 18K€ per year depending on company’s performance)

– 38 days of holidays/year

– Alan Blue: Comprehensive 100% premium medical coverage for you and your family

– Swile Meal Tickets: Enjoy daily meal tickets to fuel productivity

– Navigo Card: Seamless commuting with a 100% covered Navigo card

– Gear: Get the laptop, tools, and equipment you need for your job

– Team building: We all meet once per year at really cool places around the world (check our video here

RECRUITMENT PROCESS

1. Screen CV and interview with Lucas TAM

2. Interview with Eliott – Lead data & Senior Data engineer

3. Live technical interview with Eliott

4. Interview with Mickael – CTO

5. Reference Check & Offer

6. Interview with Charles CEO