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Junior Rails Developer Jobs in Pennsylvania (NOW HIRING)

Serve as part of a team overseeing junior engineers on mid- to large size projects. * Apply knowledge and understanding of rail design, rail operations and construction on or about a railroad ...

Serve as part of a team overseeing junior engineers on mid- to large size projects. * Apply knowledge and understanding of rail design, rail operations and construction on or about a railroad ...

Senior Traction Power Engineer

Ambler, PA

$100.50K - $138K/yr

... rail and transit, tunnels, and water. Want to be part of the creation and construction of our ... Lead a group of junior electrical engineers to develop traction power design packages * Design ...

Senior Traction Power Engineer

Ambler, PA

$100.50K - $138K/yr

... rail and transit, tunnels, and water. Want to be part of the creation and construction of our ... Lead a group of junior electrical engineers to develop traction power design packages * Design ...

Senior Traction Power Engineer

Ambler, PA · On-site

$100.50K - $138K/yr

... rail and transit, tunnels, and water. Want to be part of the creation and construction of our ... Lead a group of junior electrical engineers to develop traction power design packages * Design ...

... rail, aviation, federal transportation ports and marine infrastructure, your work will directly ... Experience managing junior staff * Excellent communication skills and working in a team environment

... rail, aviation, federal transportation ports and marine infrastructure, your work will directly ... Experience managing junior staff * Excellent communication skills and working in a team environment

... highway and railway projects * Select standard bridge engineering/design procedures, develop ... Experience managing junior staff * Excellent communication skills and working in a team environment

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Junior Rails Developer information

See Pennsylvania salary details

$24.1K

$89.2K

$137.8K

How much do junior rails developer jobs pay per year?

As of Jun 4, 2026, the average yearly pay for junior rails developer in Pennsylvania is $89,189.00, according to ZipRecruiter salary data. Most workers in this role earn between $67,200.00 and $87,200.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Junior Rails Developer, and why are they important?

To thrive as a Junior Rails Developer, you need a solid understanding of Ruby, Ruby on Rails framework, basic front-end languages (HTML, CSS, JavaScript), and a relevant degree or coding bootcamp experience. Familiarity with tools like Git, PostgreSQL or MySQL, and test frameworks such as RSpec is typically expected. Strong problem-solving skills, eagerness to learn, and effective communication help you collaborate within development teams and grow in the role. These skills are important because they enable you to build, maintain, and improve web applications efficiently while adapting to evolving project requirements.

What types of projects and responsibilities can a Junior Rails Developer expect in their first year on the job?

As a Junior Rails Developer, you can expect to work on tasks such as fixing bugs, writing and maintaining tests, and implementing small features under the guidance of more experienced developers. You'll likely participate in code reviews, collaborate closely with product managers and designers, and be encouraged to learn best practices in coding and version control. The environment is typically supportive, with regular feedback and opportunities to ask questions, making it a great setting for professional growth. Over time, you may gradually take on more complex assignments and begin to contribute to architectural discussions.

What does a Junior Rails Developer do?

A Junior Rails Developer is an entry-level software engineer who works with Ruby on Rails, a popular web development framework. Their responsibilities typically include writing and maintaining code, fixing bugs, collaborating with other developers, and learning best practices for web application development. Junior Rails Developers often assist in building features, performing tests, and ensuring applications run smoothly while gaining experience and mentorship from more senior team members.

What is the difference between Junior Rails Developer vs Ruby on Rails Developer?

AspectJunior Rails DeveloperRuby on Rails Developer
Experience LevelEntry-level, 0-2 yearsMid to senior level, 2+ years
ResponsibilitiesAssisting in development, learning codebaseDesigning, developing, maintaining Rails applications
Required SkillsBasic Ruby/Rails knowledge, eagerness to learnStrong Ruby/Rails skills, problem-solving
Work EnvironmentStartups, small teams, internshipsEstablished companies, tech firms, agencies

The main difference between a Junior Rails Developer and a Ruby on Rails Developer lies in experience and responsibilities. Junior Rails Developers are typically entry-level, focusing on learning and assisting with tasks, while Ruby on Rails Developers have more experience and handle complex development projects independently.

What are popular job titles related to Junior Rails Developer jobs in Pennsylvania? For Junior Rails Developer jobs in Pennsylvania, the most frequently searched job titles are:

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 24 days ago


AECOM rating

8.1

Company rating: 8.1 out of 10

Based on 58 frontline employees who took The Breakroom Quiz

14th of 77 rated construction


Job description

Company Description

Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

Job Description

AECOM is seeking a talented OCS (Overhead Catenary Systems) Engineer to join our World Class Rail team in Philadelphia!

The ideal candidate will be part of the Overhead Catenary Systems (OCS) Engineering team responsible for a variety of engineering tasks including, but not limited to planning, conceptual engineering, design, final engineering, constructability, and cost estimating. Here's an opportunity to work on some signature projects with some of the largest transit agencies!! Join us!!

Typical tasks and daily duties:

  • Serve as part of a team overseeing junior engineers on mid- to large size projects.
  • Apply knowledge and understanding of rail design, rail operations and construction on or about a railroad, overhead catenary systems, traction power substations, signals and communications systems, and track layout.
  • Develop overhead catenary systems layout drawings, profiles, hanger tabulations, erection diagrams and technical specifications.
  • Ensure compliance with all federal, state & local regulations Overhead Catenary System (OCS).
Qualifications

MINIMUM:

  • BA/BS Engineering or related field  and 4 years of related experience or demonstrated equivalency of experience and/or education  
  • Experience in the design and analysis of overhead electrification systems, including a variety of project scopes and design phases ranging from preliminary design through construction 

PREFERRED :

  • Experience designing and implementing a variety of overhead system types including auto-tensioned and fixed termination systems, simple catenary and single contact wire/trolley wire, as well as both AC and DC systems.
  • Experience utilizing AutoCAD and MicroStation into the design of electrification systems.
  • Should also have knowledge of a variety of design software packages, including STAAD, LPile and MathCAD. 
  • Experienced in the development of specifications, cost estimating, construction staging, and design around active railroad and should be familiar with construction and installation practices. 
  • Ability to provide instruction, management and oversight to junior engineers in the practice to develop knowledge of OCS elements, guide them through design tasks and increase overall OCS capabilities of the practice.

Additional Information
  • Relocation is an option for this position
  • We are interested in every qualified candidate eligible to work in the United States.  Sponsorship may be available for current visa holders in the United States

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community—where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines. 


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