Senior Level Developer

Position Overview

The Senior-Level Developer serves as a technical modernization lead responsible for designing, refactoring, and implementing AWS Cloud Native solutions as part of a large‑scale legacy system‑of‑systems migration initiative.

This role requires expert‑level proficiency in Python and deep expertise in AWS services and serverless architecture. The Senior-Level Developer will actively participate in system discovery, contribute to development of a structured systems inventory, and support creation and execution of phased migration plans from legacy on‑premises platforms to cloud‑native environments.

This position is not limited to feature development; it requires ownership of complex refactoring efforts, architectural fidelity, and integration stability across interconnected modernization work streams.

• Participate in structured discovery sessions to assess legacy systems, data flows, and integration dependencies.
• Contribute to development of a comprehensive systems inventory documenting:
  • Functional capabilities
  • Technical stack
  • Data dependencies
  • Upstream/downstream integration points
• Support development of a phased migration plan, including:
  • Refactor vs lift‑and‑shift analysis
  • Risk identification
  • Sequencing of interdependent systems
  • Hybrid mitigation strategies
• Collaborate with architects and Requirements Engineers to align modernization strategy with technical feasibility.

• Lead complex refactor efforts from legacy environments (e.g., SAS, file‑based batch systems) to Python‑based AWS Cloud Native architectures.
• Redesign algorithms and workflows for scalability and performance.
• Ensure computational and functional equivalence during migration.
• Replace file‑based ingestion models with API‑ and database‑driven architectures.
• Optimize high‑volume, data‑intensive applications for distributed execution.

including:

• Advanced data processing
• Modular architecture design
• Performance optimization
• Test‑driven development practices

• Design and implement solutions using AWS services such as:
  • Lambda
  • ECS / EKS
  • Fargate
  • Aurora/Postgres
  • Event Bridge
  • SNS/SQS
  • Glue
  • Batch
  • S3
  • IAM / KMS
• Architect event‑driven and serverless patterns.
• Implement scalable containerized workloads.
• Ensure alignment with enterprise cloud guardrails and security requirements.
• Optimize cost, performance, and resilience within AWS environments.

Expert‑level experience in AWS Cloud Native architectures and serverless technologies is required.

• Identify cross‑workstream integration risks.
• Ensure upstream/downstream compatibility during phased modernization.
• Support design of orchestration patterns to prevent sequencing errors and data thrashing.
• Collaborate with other Senior Developers across work streams to coordinate shared services and integration layers.
• Participate in architecture review discussions and technical governance forums.

• Design CI/CD‑aware applications compatible with Git Lab or equivalent pipelines.
• Integrate automated testing and security scanning into development lifecycle.
• Troubleshoot pipeline failures and optimize build processes.
• Ensure observability through structured logging, metrics, and monitoring.
• Support infrastructure‑as‑code alignment (Terraform/Cloud Formation collaboration).

• Participate in Agile Scrum ceremonies.
• Provide technical decomposition of EPICs into implementable features.
• Mentor Mid‑Level Developers.
• Assist Product Owner and Requirements Engineer in refining complex stories.
• Contribute to Definition of Done including:
  • Code complete
  • Automated tests implemented
  • Security checks passed
  • Documentation updated

• 8+ years of software development experience.
• Expert‑level proficiency in Python.
• Demonstrated experience participating in development and execution of a systems inventory and migration plan from legacy on‑premise systems to AWS Cloud.
• Expert‑level experience with AWS services and serverless architectures.
• Experience…