Senior Backend Engineer - Python, APIs, Docker & Kubernetes

Freedom Technology Solutions Group; Maryland; On-site; USD 150,000 - 190,000; Full time

Job summary

Freedom Technology Solutions Group is seeking a Senior Backend Developer to design, build, and scale robust backend services in a fast‑paced, mission‑driven environment in the DC metro area.

You will work with Python, Docker, Kubernetes, OpenSearch and PostgreSQL, own API design, contribute to CI/CD, mentor teammates, and collaborate with product and security teams to deliver reliable applications.

Qualifications

• 9 Years of experience in Software or Systems Engineering roles or a highly related field of work with similar scope and responsibilities.
• A Bachelor’s degree may be substituted for 4 years of experience and a Master’s Degree may be substituted for 6 years of experience.
• TS/SCI Clearance with Active CI Polygraph
• Strong experience developing backend services and REST APIs
• Experience developing and maintaining backend applications and services using Python.
• Proficiency with PostgreSQL, including relational data modeling, SQL, schema migrations, indexing, and query optimization.
• Understanding of OpenSeach data structures, indexing and querying.
• Hands-on experience with Docker, including writing Dockerfiles, building images, and troubleshooting containers.
• Strong communication skills and the ability to translate business and customer needs into clear technical requirements

Responsibilities

• Design, develop, and maintain backend functionality within applications using Python, Docker, Kubernetes, Opensearch and PostgreSQL.
• Develop and maintain backend services and REST APIs, including request validation, error handling, and authentication and authorization integration.
• Use Pydantic for data validation and SQLAlchemy for database access and object-relational mapping in Python services.
• Design and maintain PostgreSQL schemas, queries, indexes, and database migrations, with attention to performance and data integrity.
• Build and maintain Docker images and deploy, configure, and troubleshoot applications in OpenShift.
• Investigate and resolve production issues across the user interface, backend services, database, and application deployment.
• Work with customers, product owners, and other stakeholders to clarify requirements, identify dependencies, and estimate implementation effort.
• Participate in technical design and code reviews, write automated tests, and maintain technical documentation.
• Mentor developers and collaborate with operations and security teams to support reliable application delivery.
• Deep expertise of Python and API design
• Familiarity with Linux environments and Kubernetes concepts.
• Experience configuring CI/CD pipelines and automating application deployments.
• Experience improving application security, accessibility, performance, and reliability.
• Experience working in an Agile development environment and coordinating with product, operations, and security teams.

Skills

Python

Docker

Kubernetes

PostgreSQL

REST APIs

Pydantic

SQLAlchemy

OpenShift

CI/CD

Linux

Security

Agile

API design

TS/SCI Clearance

Education

Bachelor’s degree or higher

Tools

OpenShift

Job description

Freedom Technology Solutions Group is seeking a Senior Backend Developer to design, build, and scale robust backend services in a fast‑paced, mission‑driven environment in the DC metro area.

You will work with Python, Docker, Kubernetes, OpenSearch and PostgreSQL, own API design, contribute to CI/CD, mentor teammates, and collaborate with product and security teams to deliver reliable applications.