Senior Software Development Engineer - React.js/Python
First seen by Alion on Oct 30, 2026.
Responsibilities :
- Develop highly scalable front-end applications using React JS, AG Grid, TypeScript, HTML5 and CSS3.
- Deliver to production on Azure using CI/CD (GitHub Actions) and integrated Azure services.
- Collaborate and join with backend engineers to enhance Python/Django APIs and deliver end-to-end features.
- Identify and resolve performance issues and bottlenecks.
- Implement authentication and authorization across systems and environments.
- Write maintainable, well-tested code (unit tests), and help define and raise the teams engineering standards.
- Produce clear documentation and communicate technical decisions effectively.
- Collaborate effectively, take ownership, and work independently when needed.
Key skills and competencies :
- 8 years of prior experience as a developer in the required technologies.
- Strong professional experience building production UI applications with TypeScript and a modern JavaScript framework (React/Vue/Angular/etc.).
- Hands-on experience with advanced data grids (AG Grid strongly preferred) including server-side data loading, filtering, and performance tuning.
- Strong front-end fundamentals (HTML, CSS, browser APIs, accessibility, performance).
- Comfort working across the stack : consuming and evolving APIs (Python/Django exposure is a plus; willingness to learn is required).
- Experience with data modeling and SQL.
- Experience building and maintaining shared UI component libraries and design systems (Storybook).
- Experience implementing authentication/authorization patterns (SSO, OIDC/OAuth2, RBAC).
- Experience with modern front-end build and tooling (Node.js, Vite, npm workspaces/monorepos).
- Proven track record improving code quality : testing, review practices, refactoring, and setting team conventions.
- Experience delivering software in a CI/CD environment (GitHub Actions or similar).
- Cloud experience deploying and operating web applications (AWS/GCP/Azure all acceptable; Azure is what we use).
- Strong written and verbal communication, with the ability to document decisions and align stakeholders.
Nice to have :
- Broader backend experience beyond Python/Django (e.g., Node.js, Java, .NET) and non-REST integration patterns (events/queues, gRPC).
- Practical familiarity with Azure services and operational concerns (app hosting, identity, networking, observability).
- Experience using LLM-assisted development tools effectively on large codebases (e.g., Claude Code, GitHub Copilot).
Skills
Full Stack, React.js, Python, TypeScript, Django, Azure, SQL Server, UI, HTML5, CSS3