Position Overview

The Senior Developer, Full Stack US Space Systems plays a critical role in building the next generation of RS21’s data and AI-powered applications. The ideal candidate designs, develops, and deploys scalable web systems that sit at the intersection of product, data, and intelligent automation. The role supports both high impact client engagements and the continued evolution of RS21’s internal products, including Prequip.

This position requires strong engineering capability across frontend and backend systems, along with sound architectural judgement. The Senior Developer, Full Stack US Space Systems is expected to understand how application layers integrate with cloud infrastructure, data platforms, and AI services, and to build systems that are secure, performant, and production ready. The ideal candidate understands and has implemented modern three-tier web application architectures, including frontend presentation layers, backend service layers, and data persistence layers. They are comfortable moving between these layers and designing systems where each tier has clearly defined responsibilities and interfaces.

The individual in this role demonstrates technical depth, systems thinking, and accountability. They drive work from concept through deployment, contribute to architectural discussions, and collaborate effectively with data engineers, AI developers, product stakeholders, and client teams. Clear communication, adaptability, and the ability to operate in evolving environments are essential for success.

This role plays an important part in strengthening RS21’s technical foundation as the organization continues to expand its data readiness services and product offerings.

Key Responsibilities

Application Architecture and Development

Design, develop, and maintain scalable full stack web applications using a clear three-tier architecture consisting of presentation (frontend), application/service (API/backend), and data layers, ensuring clean separation of concerns and maintainable system boundaries.
Translate business and technical requirements into well structured, maintainable application architecture.
Design and develop component-based front-end applications using modern frameworks such as Vue, React, or similar, including state management, routing, and API integration.
Build robust backend services and APIs to support data driven functionality.
Ensure applications are production ready, secure, and performant.

API and Service Layer Engineering

Design and implement RESTful or GraphQLAPIs that expose curated data and system functionality.
Integrate applications with internal data platforms, data warehouses, and external services.
Implement proper error handling, validation, logging, and observability across services.
Support versioning and lifecycle management of APIs.

Data Platform Integration

Collaborate with data engineering teams to integrate applications with lakehouse and warehouse environments.
Consume curated datasets and expose them through secure application layers.
Support real-time and batch data workflows as required by business use cases.
Ensure data accuracy, consistency, and appropriate access controls within applications.

AI and Advanced Feature Integration

Integrate AI and LLM driven capabilities into user-facing applications where applicable.
Collaborate with AI platform developers to operationalize models into production systems.
Ensure responsible and secure implementation of AI enabled features.

Cloud Deployment and Infrastructure

Deploy and maintain applications in AWS environments.
Utilize containerization tools to support portability and scalability.
Contribute to CI/CD pipelines and automated deployment processes.
Partner with infrastructure teams to ensure reliability, uptime, and cost efficiency.

Performance Optimization and Scalability

Monitor application performance and proactively address bottlenecks.
Optimize database queries, API calls, and front-end rendering performance.
Design systems that scale to support increased data volume and user demand.
Implement authentication and authorization controls aligned with security best practices.
Ensure compliance with data protection standards relevant to client engagements.
Follow secure coding standards and participate in remediation efforts when vulnerabilities are identified.

Cross-Functional Collaboration

Partner with product leaders, project managers, data engineers, and AI developers to align on delivery priorities.
Participate in technical design sessions and architecture reviews.
Support client discussions when technical clarification or solution alignment is required.
Participate in peer code reviews and uphold engineering standards.
Own features end to end from design through deployment.

Qualifications

7+ years of professional full stack development experience.
Active clearance required. Top Secret preferred. Must be eligible for SCI
Strong frontend development experience using modern frameworks such as Vue or React.
Strong backend development experience with Python or comparable languages.
Experience designing and consuming APIs in production environments.
Experience deploying and supporting applications in AWS.
Experience designing application data models and implementing database interaction layers using relational or NoSQL systems.
Ability to translate business requirements into scalable technical solutions.
Proven ability to identify and drive improvements to system architecture, developer workflows, and user experience with minimal direction.
Experience integrating AI or LLM capabilities into production applications strongly preferred.
Experience building applications on top of lakehouse or modern data warehouse architectures strongly preferred.
Advanced AWS experience, including architecture level decision making strongly preferred.
Experience working in data intensive or analytics driven environments preferred.

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