Senior Backend Developer (Node.js / AWS Serverless)

Job#: 3024885

Job Description

Senior Backend Developer (Node.js / AWS Serverless)

Overview

A high‑performing backend engineering team is expanding due to increased project demand and upcoming regulatory initiatives. They develop internal, business‑critical APIs used across major digital channels—including online banking and other enterprise applications.

All development is net‑new, modern, and built entirely on a serverless AWS stack. The team is looking for a senior‑level backend engineer who can ramp up quickly, take ownership of services, and contribute independently with minimal oversight.

Team size: 6 onshore developers (mix of senior & mid‑level engineers)

Line of Business: NARP (North American Retail Payments), Canadian P&BB (Personal & Business Banking) Technology

Est. Start Date: ASAP

Length of Contract: 6 month to start

Possibility of Extension?: Yes

Possibility of FTE?: Yes after contract ends

Physical Working Location (required): Downtown Toronto

Is this role remote?: Hybrid - 2 days a week (Tuesday & Thursday)

Team Overview

This team is responsible for backend API development and integration, supporting a range of internal, business‑critical services consumed by online channels such as online banking and other digital platforms. All services are internal‑facing and built on a modern AWS serverless stack.

The team is experiencing increased demand and an influx of new projects, including at least one regulatory initiative, and current capacity is not sufficient to meet delivery needs. As a result, the team is looking to add a senior‑level backend engineer who can ramp up quickly and contribute independently.

• Team size: 6 onshore developers
• Experience mix: 3 very senior engineers, 3 mid‑level
• Work type: Primarily net‑new development, not legacy maintenance

What This Role Will Be Working On

The incoming engineer will focus on designing, building, and integrating RESTful APIs that power internal digital channels.

Key responsibilities include:

• Developing new backend APIs and services using Node.js and TypeScript
• Building and maintaining serverless services on AWS, including:
• AWS Lambda
• API Gateway
• Supporting AWS services as needed
• Integrating APIs with downstream and upstream internal systems
• Supporting regulatory‑driven development where accuracy, reliability, and traceability are important
• Writing clean, maintainable, and testable code for production environments
• Participating in deployments through an AWS CI/CD pipeline
• Collaborating with QA resources embedded in the team to ensure quality and coverage

This role is hands‑on and delivery‑focused, with an expectation that the engineer can own workstreams with minimal oversight once ramped.

Core Requirements

• Node.js (production experience)
• TypeScript
• REST API design and development
• AWS (hands‑on experience), especially:
• AWS Lambda
• API Gateway
• Serverless architectures
• Express.js or similar Node.js frameworks
• Unit testing (the team has QA support, but developers are expected to write and maintain tests)
• Experience deploying services through AWS pipelines / CI‑CD

Nice to Have

• Experience using AI‑assisted development tools (e.g., GitHub Copilot) to improve productivity

EEO Employer

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at [email protected] or 844-463-6178.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide.

Apex Systems is part of the Commercial Segment of ASGN Incorporated.

NYSE: ASGN

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Apex Systems.