What are the responsibilities and job description for the Java Developer with Apache Spark experience (W2 Contract) position at Delta System & Software, Inc.?
About the Role
Java Developer with Apache Spark experience (W2 Contract)
Architect and build scalable, fault-tolerant data pipelines using Apache Spark (Java). Lead design of batch and streaming ETL/ELT systems handling large data volumes. Deep-dive performance tuning: partitioning strategy, memory management, shuffle/skew optimization, job cost reduction. Set coding standards and lead code/design reviews across the team. Drive technical decisions on data architecture, storage formats, and pipeline orchestration. Mentor mid-level and junior engineers; act as a technical escalation point. Partner with product, analytics, and platform teams to translate requirements into scalable systems. Own production reliability — on-call ownership, incident response, root-cause analysis for pipeline failures. Evaluate and introduce new tools/frameworks where they improve the system. Contribute to capacity planning and cost optimization for cluster infrastructure.
Responsibilities
- Architect and build scalable, fault-tolerant data pipelines using Apache Spark (Java)
- Lead design of batch and streaming ETL/ELT systems handling large data volumes
- Deep-dive performance tuning: partitioning strategy, memory management, shuffle/skew optimization, job cost reduction
- Set coding standards and lead code/design reviews across the team
- Drive technical decisions on data architecture, storage formats, and pipeline orchestration
- Mentor mid-level and junior engineers; act as a technical escalation point
- Partner with product, analytics, and platform teams to translate requirements into scalable systems
- Own production reliability — on-call ownership, incident response, root-cause analysis for pipeline failures
- Evaluate and introduce new tools/frameworks where they improve the system
- Contribute to capacity planning and cost optimization for cluster infrastructure
Qualifications
- Bachelor’s or Master’s degree in Computer Science, Engineering, or related field
Required Skills
- 7 years of professional Java Development experience
- 5 years hands-on experience with Apache Spark in production environments
- Expert-level understanding of distributed systems: fault tolerance, data locality, shuffle mechanics, resource management
- Proven track record designing systems processing terabyte scale data
- Strong SQL skills and deep familiarity with columnar storage formats (Parquet, ORC, Avro, Delta Lake/Iceberg)
- Experience with cluster managers (YARN, Kubernetes) and cloud-managed Spark
- Proficiency with Kafka
- Strong grasp of CI/CD, containerization, and infrastructure-as-code practices
Preferred Skills
- Experience with Flink or other stream-processing frameworks
- Familiarity with data governance, lineage, and quality frameworks
- Experience with workflow orchestration at scale
- Background in system design for multi-tenant or multi-region data platforms
- Prior experience leading a team or acting as a technical lead
Responsibilities
- Excellent communication — able to explain technical tradeoffs to non-technical stakeholders
- Strong mentorship and coaching ability
- Comfortable driving ambiguous, cross-team technical initiatives
Required Skills
- Good Communication skills
- 5 days Work from Office at Berkley Heights, NJ
- Team Player
- Ability to work in a changing environment
- Strong problem solving and analytical skills
- Ability to work independently or within a team
- Manage day-to-day challenges and communicate developmental risks with the technical team