Python Developer Contract Jobs in Cincinnati, OH

Role: Java Lead Developer
Location: Mason, OH (Hybrid)
Duration: 12+ Months
Requirements:
• Java Development - 10+ Years
• Spring Boot & Microservices - 8+ Years
• REST API Development - 8+ Years
• AWS Cloud (S3, IAM, Security Fundamentals) - 6+ Years
• AWS Glue (Jobs, Crawlers, Workflows) - 4+ Years
• ELT/Data Ingestion Pipelines - 4+ Years
• Apache Iceberg (Schema Evolution, Partitioning, Compaction) - 2+ Years
• Oracle Database / Aurora MySQL - 8+ Years
• MongoDB - 3+ Years
• CI/CD, Git, Maven/Gradle, Automated Testing - 5+ Years
• Technical Leadership (Architecture, Code Reviews, Mentoring) - 3+
Years
• Production Support & Troubleshooting - 5+ Years
• We are looking for a Senior Tech Lead Java API / Microservices Lead
Developer to design, build, and support scalable microservices and REST
APIs on AWS. This is a backend-only role (not full stack). You will lead
technical design, mentor engineers, and ensure secure, reliable, and
high-performance services.
• The role also requires strong knowledge of AWS S3, Glue-based ELT, and
Apache Iceberg tables to support data ingestion, cataloging, and
analytics use cases, plus basic AI/ML awareness for integrating with
model-driven services.
Responsibilities:
• API / Microservices (Java, Spring Boot) Lead the design and
development of microservices and REST APIs using Java and Spring Boot.
• Define API contracts, implement business logic, validations,
standardized error handling, and logging. Apply resiliency patterns
(timeouts, retries, circuit breakers, idempotency) and drive performance
improvements. Conduct code reviews, enforce engineering standards, and
mentor team members.
• AWS & Production Support Build and operate services on AWS, following
security and operational standards (IAM basics, networking awareness,
observability). Support CI/CD, release activities, and production
troubleshooting.
• Data Stores Design and optimize data access with: Oracle Aurora MySQL
MongoDB Perform query tuning/indexing guidance and improve service
performance and reliability. S3 + Glue + Iceberg / ELT (added) Work with
file and table-based data in Amazon S3 (folder/partition design, access
controls, encryption, lifecycle).
• Support ELT pipelines using AWS Glue (jobs, crawlers, workflows) for
ingestion, transformation, and standardization. Design and work with
Apache Iceberg tables (schema evolution, partitioning, table properties,
compaction/maintenance patterns).
• Collaborate with data engineering and analytics teams to enable
consumption via Athena/Glue Data Catalog (and related query engines).
• Troubleshoot data pipeline issues (permissions, catalog/table
visibility, schema mismatches, performance bottlenecks). AI/ML Awareness
(supportive) Integrate services with existing ML inference endpoints;
validate payloads and handle model-driven response patterns. Support
controlled rollouts for model-dependent features in coordination with ML
teams. Required Qualifications Strong experience in Java and Spring Boot
building production APIs/microservices. Strong AWS experience including
S3 and security fundamentals (IAM, encryption, least privilege).
• Hands-on experience with AWS Glue and ELT/data ingestion patterns.
Working knowledge of Apache Iceberg tables (or strong experience with
lakehouse table formats). Strong database experience with Oracle/Aurora
MySQL, plus knowledge of MongoDB. Experience with CI/CD, Git,
Maven/Gradle, and automated testing.
• Strong troubleshooting and communication skills; ability to lead
design discussions. Preferred / Nice to Have Athena optimization
experience (partition pruning, Iceberg maintenance/compaction strategy).
Kafka/event streaming. Docker/Kubernetes (EKS) or ECS. Observability
tools: CloudWatch, Splunk/ELK, Prometheus/Grafana, OpenTelemetry. Python
for scripting/automation. Security: OAuth2/OIDC, JWT, OWASP, Secrets
Manager/Parameter Store. Infrastructure as Code:
Terraform/CloudFormation.