Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Software Engineer I

$86.6k - $144.4k

RELX

Are you a collaborative Software Engineer looking to work for a mission driven global organization?

About the role We are seeking a highly capable Software Engineer to join our fast-paced, Agile development team. This full-stack JavaScript engineer will own and contribute to features across the frontend and backend, partnering closely with product, design, and QA. The ideal candidate has solid experience with React, Node.js, and Express.js, a practical understanding of CI/CD pipelines (preferably Jenkins), and a strong commitment to code quality, testing, and collaborating in an Agile environment. Fluency with GitHub workflows and pull-request-based collaboration is essential.

About the team; As a Sr Software Engineer you have the opportunity to join a diverse team of technologists as we continue to build mission critical products in the Health Markets space.

Responsibilities

· Designing, developing, testing, and maintaining scalable web applications using React on the frontend and Node.js/Express.js on the backend.

· Translating product requirements into well-architected, maintainable code and robust APIs.

· Implementing automated tests (unit/integration) and ensure code quality through reviews and best practices.

· Collaborating in an Agile/Scrum environment: participate in standups, sprints planning, backlog grooming, and demos.

· Contributing to CI/CD pipelines and release processes; work with Jenkins to build, test, and deploy features.

· Writing and maintaining comprehensive documentation, including code comments, README updates, and API specs.

· Troubleshooting production issues, perform root-cause analysis, and implementing long-term fixes.

· Mentoring junior engineers and sharing knowledge to uplift the team’s skills and coding standards.

· Collaborating with QA to define and implement test strategies and acceptance criteria.

Required Qualifications

· Professional software development experience in full-stack JavaScript.

· Proficiency with React (hooks, state management, component design) and modern JavaScript/TypeScript.

· Experience with Node.js and Express.js for API development.

· Demonstrated experience building and consuming RESTful APIs.

· Proficiency with GitHub workflows, pull requests, issue tracking, and collaboration in a distributed or co-located team.

· Experience with linting (ESLint) and automated testing (unit tests; familiarity with Jest, Mocha, or similar).

· Working knowledge of Agile/Scrum methodologies and collaboration in cross-functional teams.

· Experience with additional front-end tooling and state management libraries (e.g., Redux or modern alternatives).

· Familiarity with other back-end technologies or databases (e.g., SQL/NoSQL) and ORM/query builders.

Elsevier is a renowned global information analytics company that primarily focuses on providing scientific, technical, and medical (STM) research content, tools, and services. It is one of the largest publishers of academic journals and scholarly literature in the world.

Elsevier operates in various domains, including science, technology, medicine, social sciences, and more. They publish a vast number of peer-reviewed journals covering a wide range of disciplines. These journals act as platforms for researchers and academics to share their findings and contribute to the advancement of knowledge in their respective fields.

In addition to publishing, Elsevier offers a suite of digital solutions and services to support researchers, scientists, and professionals in their work. They provide online platforms like ScienceDirect, Scopus, and Mendeley, which offer access to a vast repository of scholarly articles, research papers, and other scientific content. These platforms often serve as essential resources for software developers seeking to stay updated with the latest scientific advancements.

U.S. National Base Pay Range: $86,600 - $144,400. Geographic differentials may apply in some locations to better reflect local market rates.

This job is eligible for an annual incentive bonus.

We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here ( to access benefits specific to your location.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact View phone number on click.appcast.io.

Criminals may pose as recruiters asking for money or personal information. We never request money or banking details from job applicants. Learn more about spotting and avoiding scams here.

Please read our Candidate Privacy Policy.

We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.

USA Job Seekers:

EEO Know Your Rights.

RELX is a global provider of information-based analytics and decision tools for professional and business customers, enabling them to make better decisions, get better results and be more productive.

Our purpose is to benefit society by developing products that help researchers advance scientific knowledge; doctors and nurses improve the lives of patients; lawyers promote the rule of law and achieve justice and fair results for their clients; businesses and governments prevent fraud; consumers access financial services and get fair prices on insurance; and customers learn about markets and complete transactions.

Our purpose guides our actions beyond the products that we develop. It defines us as a company. Every day across RELX our employees are inspired to undertake initiatives that make unique contributions to society and the communities in which we operate.

Vacancy posted 3 days ago
Similar jobs that could be interesting for youBased on the Senior Software Engineer I in Philadelphia, PA vacancy
  •  ...Primary Duties & Responsibilities Software development – 90% Design and develop software features based on high level customer and product...  ...issues legacy products Work with validation and integration engineers optical, hardware and test engineering teams to continuously... 
    Senior
    Work at office

    II-VI UK, Ltd.

    Horsham, PA
    3 days ago
  • $86k - $139k

     ...Senior Software Engineer SMES Job Code : 36284 Location : Camden, NJ (On‑Site) Schedule : 9/80 Regular (Every Other Friday Off) Job Description : L3Harris Space Mission Systems is seeking a Senior Software Engineer. Responsibilities include leading a software development... 
    Senior
    Local area
    Flexible hours

    Harris Geospatial Solutions

    Camden, NJ
    1 day ago
  •  ...Job Title: Senior Software Engineer Location: Philadelphia, PA Job Type: Long-Term Contract Work Setting: Onsite Project Overview We are supporting a large-scale airport technology environment that requires skilled IT professionals to support, maintain... 
    Senior
    Long term contract

    Navitas Healthcare LLC

    Philadelphia, PA
    2 days ago
  •  ...a top veteran employer and Certified Great Place to Work ASRC Federal Mission Solutions is a premier provider of systems engineering, software engineering, system integration and project management services for real-time, mission-critical defense systems. We are seeking... 
    Senior
    For contractors
    Work experience placement

    ASRC Federal Holding Company

    Moorestown, NJ
    2 days ago
  •  ...Senior Embedded Software Engineer Department: Engineering Location: Camden, NJ - Onsite Role Type: Contract, Full-time position (9/80 Schedule with 8am start time) Clearance: Secret About Our Client Our client is a leading defense technology company... 
    Senior
    Full time
    Contract work

    Catapult Solutions Group

    Camden, NJ
    5 days ago
  • $140k - $160k

     ...Senior Software Engineer As Senior Software Engineer, you will architect, build, and deploy robust integration solutions from inception through production rollout. You'll partner with technical leads, UX designers, and product managers to deliver scalable, high-performance... 
    Senior
    Full time
    Temporary work
    Local area

    Chubb

    Philadelphia, PA
    2 days ago
  •  ...Senior Software Engineer Proscia is revolutionizing pathology, the last major frontier in healthcare to embrace digital. As a leader in pathology AI software, we are empowering pathologists and scientists to transition from traditional microscope-based workflows to... 
    Senior
    Work at office
    Shift work

    Proscia

    Philadelphia, PA
    2 days ago
  • $126k - $190k

     ...agencies rely on Relativity's legal AI software to securely surface and manage the most...  ...What We Do At Relativity, engineers don't just write code- they harness AI tools...  ...Kubernetes Integration Team is seeking a Senior Engineer to help us prototype and rapidly... 
    Senior
    Remote work
    Home office

    Relativity

    Philadelphia, PA
    5 days ago
  •  ...Job Description Primary Duties & Responsibilities Software development - 90% Design and develop software features based...  ...issues legacy products Work with validation and integration engineers optical, hardware and test engineering teams to continuously... 
    Senior
    Work at office

    II-VI Aerospace & Defense

    Horsham, PA
    19 hours ago
  • $115.7k - $130k

     ...Senior Full Stack Developer As a Senior Full Stack Developer on the TechShare team,...  ...collaborate with business analysts, backend engineers, lead developers, and business partners...  ...: ~6+ years of professional software development experience ~ Strong experience... 
    Senior
    Full time
    Work at office
    Remote work
    2 days per week

    Subaru

    Camden, NJ
    1 day ago
  •  ...Senior Software Engineer Bentley Systems has an exciting new opportunity for talented individuals to develop our cloud-form service used by many of our cloud-based applications. Our new colleagues will be responsible for and take part in all the development stages... 
    Senior
    Worldwide

    Bentley

    Philadelphia, PA
    3 days ago
  • $94k - $115k

     ...Senior Software Engineer The Senior Software Engineer designs, builds, and supports modern web applications using TypeScript, React, and a Node.js API tier deployed on cloud platforms. This role provides hands-on technical leadership across the full SDLC—helping teams... 
    Senior
    Contract work
    Work at office
    Remote work
    Work visa
    Relocation package
    3 days per week

    Transamerica

    Philadelphia, PA
    1 day ago
  • $118k - $178k

     ...for innovation and creating the best experience for job seekers. (*Comscore, Total Visits, March 2025) Day to Day As a Software Engineer III on the AI Gateway & Guardrails team at Indeed, you will own and drive the development of platform services that connect Indeed... 
    Senior
    Work experience placement
    Local area

    Indeed

    Philadelphia, PA
    5 days ago
  •  ...allows for seamless development, ownership, and monetization of composable Smart Agents. We are seeking a talented and experienced Software Engineer with expertise in blockchain development to join our team at Talus Network. As a Software Engineer, you will play a crucial... 
    Senior
    Contract work
    Remote work

    Golang Works

    Maple Shade, NJ
    3 days ago
  • $130k - $200k

    This Jobot Job is hosted by: Katie Griffith Are you a fit? Easy Apply now by clicking the Apply button and sending us your resume. Salary: $130,000 - $200,000 per year A bit about us: We are an oil & gas firm servicing clients throughout Texas and beyond. ...
    Senior
    Local area

    Jobot

    Philadelphia, PA
    3 hours ago
  •  ...and generous perks, Perpay is the best place to be in Philadelphia right now. About the Role: We are looking for senior backend engineers passionate about backend technology, excellent user experience and system reliability. The ideal candidate has helped lead... 
    Senior
    Odd job
    Full time
    Work at office
    Local area
    Relocation package
    Weekend work

    Perpay - Career's Page

    Philadelphia, PA
    4 days ago
  •  ...Senior Software Engineer, Fullstack Philadelphia, Pennsylvania, United States About Us Perpay is a certified B Corp and Philadelphia's most impactful growth-stage startup. We are driven by a mission to significantly improve the financial stability of everyday... 
    Senior
    Odd job
    Full time
    Work at office
    Local area
    Relocation package
    Weekend work

    Perpay Inc.

    Philadelphia, PA
    3 days ago
  •  ...A leading quantitative trading firm in Pennsylvania is seeking a Senior Software Engineer to enhance its ETF Development Team. the ideal candidate will have 3+ years of C# development experience and familiarity with Python, C++, or JavaScript/TypeScript is advantageous... 
    Senior

    Susquehanna International Group

    Bala Cynwyd, PA
    1 day ago
  • II-VI UK, Ltd. is seeking a skilled engineer to handle verification testing of communication systems. The role involves collaborating with teams to analyze requirements, designing test plans, and conducting various tests on optical transmission systems. Applicants should... 
    Senior

    II-VI UK, Ltd.

    Horsham, PA
    4 days ago
  • A leading quantitative trading firm in Bala Cynwyd is seeking a Senior Software Developer to join their HR Technology & Shared Services team. This full-stack engineering position involves designing and building secure applications, developing backend services in C# or Java... 
    Senior

    Susquehanna International Group

    Bala Cynwyd, PA
    2 days ago
  •  ...Job Overview Title: Sr Software Engineer Location: Hybrid/Camden, NJ Duration: Contract 12+ Months Rate: $Open Responsibilities Develop backend code for applications Qualifications Experience with Spring MVC, JPA, UNIX, SQL, Design patterns, Spring framework, Web service... 
    Senior
    Contract work

    TWO95 International

    Camden, NJ
    2 days ago
  •  ...Title: Sr Software Engineer Location: Hybrid/Camden, NJ Duration: Contract 12+ Months Rate: $Open Develop backend code for applications Experience with the following technologies: Spring MVC, JPA, UNIX, SQL, Design patterns, Spring framework, Web... 
    Senior
    Contract work

    TWO95 International

    Camden, NJ
    6 days ago
  •  ...Senior Software Engineer Here at Client you will be given the autonomy to see your ideas go from a design to operational within months. You'll help us build new applications that have an immediate impact on our National Security. If complex problem solving, delivering... 
    Senior
    Immediate start
    Remote work
    Worldwide

    Cardinal Integrated

    Philadelphia, PA
    2 days ago
  •  ...Responsibilities Support, maintain, and enhance high-quality software modules within the enterprise product suite. Analyze and...  ...Communicate technical and operational issues effectively to engineering teams and business leadership. Ensure adherence to... 
    Senior

    Techvilla Solutions

    Blue Bell, PA
    2 days ago
  •  ...Senior Software Developer Senior Software Developer with an entrepreneurial mind who wants to grow their professional career! Reporting...  ...these advances can be applied to the current products and engineering practices. Interface with other technical personnel or team... 
    Senior

    Systems Staffing Group

    Horsham, PA
    8 days ago
  • $86.5k - $142.7k

     ...writing and reviewing code, building proofs‑of‑concept, and guiding engineering teams through complex technical decisions. This position...  ...and attributes for success • Strong hands‑on background in software engineering and modern application architectures. • Deep understanding... 
    Senior
    Summer holiday
    Flexible hours

    EY

    Philadelphia, PA
    1 day ago
  •  ...opportunities across different fields and industries. Are you ready to help us make the future? You will report directly to our Software Engineering Manager and you'll work out of our Fort Washington, PA location on a hybrid work schedule. Be part of a team that designs... 
    Senior
    Flexible hours

    Honeywell

    Fort Washington, PA
    5 days ago
  •  ...sensors and RF communications. What You'll Get to Do: Engineer complex multidisciplinary solutions for customers that span hardware...  ...delivery schedule. This is done while collaborating with other software/hardware engineers, stakeholders, and end users to ensure a... 
    Senior
    Full time
    Temporary work
    Immediate start

    Syzygy Integration

    Conshohocken, PA
    2 days ago
  •  ...Sr. Software Engineer Our client, a leading organization in the financial services industry, is seeking a Sr. Software Engineer to join their team. Location: Philadelphia, Pennsylvania (Hybrid 2 days a week onsite) Pay Range: Competitive 6 month contract to... 
    Senior
    Weekly pay
    Contract work
    Temporary work
    Flexible hours
    2 days per week

    Experis

    Philadelphia, PA
    2 days ago
  • $1,000 per month

     ...positioned to build the future of inclusive finance through cutting-edge technology and customer-centric solutions. Overview As a Senior Backend Engineer on the Trust Platform team, you'll play a pivotal role in shaping the systems that safeguard and personalize our financial... 
    Senior
    Temporary work
    Work at office
    Immediate start
    Remote work
    Flexible hours

    Credit-Genie

    Plymouth Meeting, PA
    2 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Software Engineer I. Be the first to apply!