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 DevOps 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 & DevOps

• 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 GitHub 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 Developer certification.

• Experience developing and configuring AWS API Gateway.

• Hands-on experience with Docker and Kubernetes (EKS).

• Experience with Windows and Linux scripting (PowerShell, Bash).

• Familiarity with financial, fare, or revenue management systems.

• Experience integrating third-party applications and tools.

• Knowledge of UX design principles, accessibility standards, and usability testing.

• Understanding of SEO coding best practices.

Why Join This Project

• Work on large-scale, mission-critical revenue systems for one of the largest transportation networks in the world.

• Contribute to the modernization of fare payment and transaction platforms.

• High-impact role with exposure to cloud-native, real-time, and secure systems.

• Long-term engagement with potential for extension.

• Competitive compensation aligned with senior-level expertise.