Job Description & Details
The demand for skilled ETL developers is soaring as companies race to turn raw data into actionable insights. With data pipelines becoming the backbone of modern analytics, mastering ETL tools opens doors to high-impact projects. This role offers a chance to work onsite in the heart of Manhattan, collaborating with seasoned data engineers.
Job Summary
We are seeking an ETL Developer to design, develop, and maintain data integration workflows using industry‑leading tools such as Informatica PowerCenter, Talend, and SSIS. The candidate will work with relational databases (Oracle, SQL Server, PostgreSQL), apply data‑modeling techniques, and ensure high‑quality data delivery for reporting and analytics.
Top 3 Critical Skills Table
| Skill | Why it's critical | Mastery Level |
|---|---|---|
| SQL / PL‑SQL | Core language for querying and transforming data in relational databases. | Senior |
| ETL Tools (Informatica, Talend, SSIS) | Enables design, execution, and maintenance of robust data pipelines. | Senior |
| Data Modeling (Star & Snowflake schemas) | Structures data for efficient reporting and analytics. | Mid |
Interview Preparation
1. How do you design an efficient ETL workflow using Informatica PowerCenter?
What the interviewer is looking for: Understanding of mapping design, source‑to‑target transformations, performance tuning (partitioning, pushdown optimization), and handling incremental loads.
2. Explain the differences between Star and Snowflake schemas and when you would choose each.
What the interviewer is looking for: Ability to discuss normalization vs. denormalization, query performance implications, and suitability for different reporting scenarios.
3. Describe a situation where you optimized a slow‑running SSIS package. What steps did you take?
What the interviewer is looking for: Practical experience with buffer size tuning, parallel execution, use of fast‑load options, and monitoring tools.
4. How would you handle data quality issues (nulls, duplicates) during the ETL process?
What the interviewer is looking for: Knowledge of data cleansing techniques, use of lookup/cache transformations, and implementation of error‑handling workflows.
5. Compare Talend Open Studio with Informatica PowerCenter in terms of scalability and licensing.
What the interviewer is looking for: Awareness of open‑source vs. commercial licensing, cluster execution capabilities, and cost‑benefit considerations.
Resume Optimization
- SQL
- PL/SQL
- Informatica PowerCenter
- Talend
- Microsoft SSIS
- Data Warehousing
- Data Modeling
- Star Schema
- Snowflake Schema
- Oracle Database
- SQL Server
- PostgreSQL
Application Strategy
When reaching out to the recruiter, send a concise email greeting, attach your updated resume, and clearly highlight your top skills that match the role. Make sure to mention related skills you possess, such as SQL/PL‑SQL, hands‑on experience with Informatica or Talend, and data‑modeling expertise. Reference any recent projects where you built or optimized ETL pipelines, and express enthusiasm for contributing to the team in Manhattan.
Career Roadmap
| Current Role | Typical Experience | Core Focus | Next Position |
|---|---|---|---|
| ETL Developer | 2‑4 years building and maintaining data pipelines | ETL design, performance tuning, data modeling | Senior ETL Developer |
| Senior ETL Developer | 5‑7 years leading complex integrations, mentoring junior staff | Architecture of large‑scale data flows, cross‑system integration | ETL Architect / Data Integration Lead |
| ETL Architect | 8+ years shaping data strategy, overseeing enterprise‑wide pipelines | End‑to‑end data platform governance, technology roadmap | Director of Data Engineering |