Backend Engineer
First seen by Alion on Sep 30, 2026.
Role : Backend Engineer - Python + AWS
About the Role :
We are looking for a talented Backend Engineer with strong expertise in Python and cloud-native application development to join our Product Engineering team. The ideal candidate will have hands-on experience building APIs and backend services using Python, FastAPI and/or Flask, along with strong knowledge of PostgreSQL and AWS.
What You'll Do :
- Design, develop, and maintain scalable backend services using Python.
- Build high-quality APIs and backend applications using FastAPI, Flask, or similar frameworks.
- Design robust API contracts, validation, error handling, and service integrations.
- Develop efficient database solutions using PostgreSQL.
- Design and optimize database schemas, SQL queries, indexes, and data-access patterns.
- Develop services capable of operating reliably within distributed and scalable system architectures.
- Design and develop cloud-native solutions using AWS services such as ECS, Lambda, DynamoDB, RDS, SQS, and API Gateway.
- Apply best practices around scalability, availability, reliability, security, observability, and cost optimization.
- Use Terraform/Infrastructure as Code to manage cloud infrastructure.
- Troubleshoot complex technical and production issues and perform root-cause analysis.
- Write clean, modular, reusable, testable, and maintainable code.
- Collaborate with Frontend, QA, Product, DevOps, and other engineering teams.
What We're Looking For :
- 3-8 years of professional experience in backend/software engineering.
- Strong programming experience with Python.
- Hands-on experience with FastAPI and/or Flask.
- Strong experience with PostgreSQL and SQL.
- Hands-on experience with AWS cloud services.
- Experience with Terraform or Infrastructure as Code.
- Strong understanding of REST API design and backend architecture.
Good to Have :
- Experience with Generative AI, LLMs, AI Agents, AI/ML, or AI-powered applications.
- Experience with Docker and containerized applications.
- Experience with application observability, monitoring, logging, and distributed tracing.
- Practical experience using Cursor, GitHub Copilot, or similar AI development tools.
Skills
Backend Architecture, Python, AWS, FastAPI, Flask, PostgreSQL