Senior Back End Engineer

DescriptionThis company operates 50K EV chargers across ~200 delivery stations today, scaling to 100K+ by 2028. MCC-Field is the next-generation field application, serving site operations, third-party contractors, and preventive maintenance teams across the company's charging network. Field technicians use it to audit, cycle-count, replace, and troubleshoot chargers under real-world constraints: intermittent connectivity in parking garages, gloved-hand device use, and shift-based operational patterns. As Software Development Engineer, you will own the technical direction of MCC-Field from R0 hardening before year end through R3+ feature delivery (2028). You will lead the platform's evolution from a Progressive Web App (PWA) with offline-first persistence, backed by AWS serverless infrastructure (Lambda, API Gateway, DynamoDB, S3, Cognito). You will partner with other development engineers, drive R1 API integrations with partner teams. You will build with production-grade rigor: full dependency injection, property-based testing, offline sync with bounded retry and conflict detection, and observability via CloudWatch. This is an IC role with clear technical leadership scope. Required Skills - Bachelor's Degree in Engineering, Computer Science, Mathematics, or equivalent - Demonstrated analytical and quantitative skills and ability to use hard data and metrics to back up assumptions and develop technical designs - Understanding of the full Software Development lifecycle - Experience developing products for customer-facing end users - 5+ years of programming experience with TypeScript or Node.js - 5+ years of experience contributing to the architecture and design (architecture, design patterns, reliability and scaling) of new and current systems - Experience building serverless applications on AWS (Lambda, API Gateway, DynamoDB, S3, Cognito)Skillssoftware development life cycle, Node.js, Aws, typescript, lambda, api gateway, dynamodb, s2, cognito, cloudwatch, CKSTop Skills Detailssoftware development life cycle,Node.js,Aws,typescript,lambda,api gateway,dynamodb,s2,cognito,cloudwatch,CKSAdditional Skills & QualificationsPreferred Skills - Experience leading a software team as a tech lead - Experience using Amazon Web Services, including AWS CDK for infrastructure-as-code - Experience developing Progressive Web Apps (PWAs) with offline-first architecture Service Workers, IndexedDB, WatermelonDB, or equivalent - Experience coaching and mentoring junior engineers or contract engineers on a software team - Experience building scalable front-end infrastructure software or distributed systems for commercial online services - Experience integrating with external REST APIs and handling partial-availability failure modes - Experience with mobile device data capture (barcode scanning, camera, GPS) or field-service tooling - Experience with Amazon internal build/deploy tooling (Brazil, Apollo, Pipelines)Candidates must be strong in TypeScript. There may be some isolated data pipeline work where Python is acceptable, but day-to-day they'll be writing TypeScript.The work splits roughly 60% BE / 40% FE. Ideal shape is 2 Sr. backend engineers Language: TypeScript is the primary requirement. The existing codebase is TypeScript across the full stack (React frontend, Node.js/Lambda backend, CDK infra).Experience LevelExpert LevelJob Type & LocationThis is a Contract position based out of Jersey City, NJ.Pay and BenefitsThe pay range for this position is $70.00 - $85.00/hr. Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)Workplace TypeThis is a fully onsite position in Jersey City,NJ.Application DeadlineThis position is anticipated to close on Oct 9, 2026.About TEKsystemsWe're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company. The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.About TEKsystems and TEKsystems Global Services Were a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. Were a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. Were strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. Were building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.Job SummaryJob number: JP-006333647Profession: Developer