Senior Python​/AWS Web Application Engineer

Position: Senior Python / AWS Web Application Engineer
Location: New York

* Senior Python / AWS Web Application Engineer Position title

Senior Python / AWS Web Application Engineer Description# Senior Python / AWS Web Application Engineer
** Client:
** Metropolitan Transportation Authority (MTA)  
** Team:
** Revenue Fare Management Systems  
*
* Location:

** New York, NY (Hybrid / On-site as required)  
** Duration:
** 12-Month Contract (Potential Extension)  
** Experience Level:
** Senior (8–12+ Years)##
** Position Overview
** The Metropolitan Transportation Authority (MTA) is seeking a Senior Python / AWS Web Application Engineer to join the Revenue Fare Management Systems team. This role will support mission-critical back-office web applications that power legacy railroad revenue systems while contributing to the development and expansion of the New Fare Payment System and the long-term roadmap to unify LIRR and MNR revenue applications.

The ideal candidate is a hands-on senior engineer with strong experience in Python-based web development, API design, cloud-native architectures, and modern Dev Ops practices. This individual will work closely with cross-functional teams to design, build, deploy, and maintain secure, scalable, and high-availability applications supporting real-time fare and transaction processing.##
** Key Responsibilities**###
** Application Development
*** Design, develop, and maintain custom Python modules and RESTful APIs supporting revenue and fare management systems.
* Build and deploy real-time transaction systems to support ticket validation and fare processing.
* Develop backend services using Python frameworks such as Django and FastAPI.
* Build and enhance web application frontends for both internal users and external customer-facing applications.
* Implement secure, scalable, and high-performance application architectures.###
** Cloud & Dev Ops
*** Develop and deploy applications in AWS cloud environments using best practices.
* Configure and manage AWS API Gateway for secure and scalable API access.
* Implement containerized solutions using Docker.
* Deploy and manage applications on Kubernetes (EKS).
* Work with AWS IAM / Identity Center to manage authentication and authorization.
* Apply server-based and serverless deployment strategies as appropriate.
* Assist with release planning, deployment execution, and post-deployment validation.###
** Collaboration & Delivery
*** Collaborate closely with cross-functional teams, including business stakeholders, UX designers, QA, and infrastructure teams.
* Participate in daily stand-ups, sprint planning, design reviews, and retrospectives.
* Provide accurate level-of-effort estimates and input on feature prioritization.
* Contribute to development tooling, documentation, and coding standards.
* Perform code reviews to ensure quality, security, and maintainability.###
** User Experience & Quality
*** Create visually appealing, user-friendly interfaces that meet usability and accessibility standards.
* Test applications for cross-browser, cross-platform, and cross-device compatibility.
* Ensure compliance with accessibility standards relevant to the client’s domain.
* Conduct observational user testing and evaluate designs against usability heuristics.
* Apply web application security best practices throughout development.##
** Required Qualifications
*** Bachelor’s degree in Computer Science, Information Systems, or a related field (or equivalent experience).
* 8–12+ years of professional experience in web application development.
* Strong proficiency in Python with hands-on experience using Django and/or FastAPI.
* Solid understanding of HTML, JavaScript, CSS, AJAX, and modern frontend practices.
* Experience building web-based applications and APIs.
* Strong knowledge of SQL and Oracle PL/SQL.
* Experience with object-oriented design and data modeling.
* Hands-on experience with AWS cloud development and deployment.
* Familiarity with Git Hub or similar source/version control systems.
* Knowledge of web application security considerations.
* Excellent communication, collaboration, and problem-solving skills.
* Ability to thrive in a fast-paced, deadline-driven environment.##
** Preferred / Additional Qualifications
*** AWS Cloud…