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Senior Backend Developer Jobs in Harrison, NJ (NOW HIRING)

Hapiko

Senior+ Backend Engineer

Brooklyn, NY · On-site

They are seeking a Senior Backend Engineer to own and evolve the real-time infrastructure behind ... DevOps mindset, comfortable deploying, monitoring, and scaling • Experience with GenAI/LLM ...

FreshDirect

Sr. Java Backend Developer

Woodbridge, NJ · On-site

$130K - $155K/yr

What You'll Do As a Senior Backend Developer (Java) , you'll help design, develop, and scale backend systems that power FreshDirect's e-commerce and logistics platforms. You'll collaborate with cross ...

Slang AI

Sr Backend Engineer

New York, NY · On-site

$185K - $215K/yr

Scope of Work This scope defines the responsibilities for a senior software engineer supporting Slang's development. You'll focus primarily on implementing robust, scalable backend services (our ...

1872 Consulting

Senior Backend Engineer

Manhattan, NY · On-site

Job Summary : 1872 Consulting is a company seeking a Senior Backend Engineer to develop high-quality software solutions. The role involves building RESTful APIs, collaborating on solution design, and ...

MetaSense, Inc.

Java Backend Developer

Manhattan, NY · On-site

$55.75 - $72.25/hr

NYC Locals Only Job Summary We are seeking a highly experienced Senior Backend Java Developer with 15+ years of Java experience to design and deliver large-scale enterprise applications and ...

Bevel

Senior Backend Engineer

New York, NY · On-site

$180K - $215K/yr

We're looking for incredible Senior Backend Engineers to help us build an ambitious roadmap. You'll get an opportunity to shape the future of Bevel and have full ownership and creative freedom to ...

Lev

Senior Backend Engineer

Manhattan, NY · On-site

The Senior Backend Engineer will be responsible for developing and maintaining the core Flask API and other microservices, collaborating with various teams, and ensuring high-quality code delivery.

Made Card

Staff Backend Engineer

New York, NY · On-site

$150K - $200K/yr

As one of the most senior backend engineers on the team, you'll play a critical role in defining technical strategy and building the infrastructure to support millions of homeowners. What You'll Do

Made Card

Staff Backend Engineer

New York, NY · On-site

$150K - $200K/yr

As one of the most senior backend engineers on the team, you'll play a critical role in defining technical strategy and building the infrastructure to support millions of homeowners. What You'll Do

HCLTech

Back End Developer

Hoboken, NJ · On-site

Collaborate with highly skilled engineering teams. * Opportunity to lead architecture and backend ... Throughout your time with us, we offer transparent communication with senior-level employees ...

Ellipsis Labs, Inc

Senior Backend Engineer

New York, NY · On-site

$170K - $250K/yr

Ellipsis Labs is seeking a Senior Backend Engineer to join our team. As an early-stage startup, we appreciate bright generalists who can iterate and ship quickly. In this role, you will: * Build and ...

Clarion

Senior Backend Engineer

New York, NY · On-site

$150K - $225K/yr

Backend systems and architecture with the CTO and a senior engineer. * Onsite Team Day (Half Day, NYC): Collaborate on real problems, present a past project, meet the team, and assess mutual fit.

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Senior Backend Developer information

See Harrison, NJ salary details

$67K

$146.5K

$199.5K

How much do senior backend developer jobs pay per year?

As of Sep 2, 2026, the average yearly pay for senior backend developer in Harrison, NJ is $146,465.00, according to ZipRecruiter salary data. Most workers in this role earn between $126,200.00 and $163,900.00 per year, depending on experience, location, and employer.

What does a senior backend developer do?

A Senior Backend Developer is responsible for designing, building, and maintaining the server-side logic of web applications. They work with databases, APIs, and server infrastructure to ensure that applications run smoothly, securely, and efficiently. In addition to writing robust code, they often mentor junior developers, contribute to architectural decisions, and collaborate with frontend teams to deliver seamless user experiences. Their expertise is crucial for scaling applications and implementing best practices in software development.

What are the key skills and qualifications needed to thrive as a senior backend developer, and why are they important?

To thrive as a Senior Backend Developer, you need advanced proficiency in server-side programming languages (such as Java, Python, or Node.js), deep understanding of API design, and experience with database management, often supported by a degree in computer science or related field. Familiarity with version control systems (like Git), cloud platforms (such as AWS or Azure), and relevant certifications in backend technologies are commonly required. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with cross-functional teams and mentor junior developers. These competencies ensure robust, scalable backend systems and drive successful project delivery in complex technical environments.

What are common challenges senior backend developers face when leading complex projects, and how can they address them?

Senior Backend Developers often encounter challenges such as integrating legacy systems with new technologies, ensuring scalability under increased load, and coordinating cross-functional teams for seamless feature delivery. Addressing these challenges typically involves proactive architectural planning, clear communication with frontend and DevOps teams, and adopting best practices like code reviews and automated testing. Staying updated on emerging technologies and fostering a culture of knowledge sharing within the team also help in overcoming technical obstacles and driving successful project outcomes.

What is the difference between Senior Backend Developer vs Backend Developer?

AspectSenior Backend DeveloperBackend Developer
Required Experience5+ years, leadership skills1-3 years, foundational skills
ResponsibilitiesDesign architecture, mentor juniors, optimize systemsImplement features, fix bugs, write code
Skills & CertificationsAdvanced coding, system design, relevant certificationsBasic coding, database knowledge
Work EnvironmentCollaborates with cross-functional teams, often in larger projectsFocuses on individual tasks within projects

The main difference between a Senior Backend Developer and a Backend Developer lies in experience, responsibilities, and leadership. Senior Backend Developers typically have more years of experience, take on complex system design, and mentor junior staff, whereas Backend Developers focus on implementing features and fixing bugs. Both roles are essential in backend development teams, but the senior role involves more strategic and leadership duties.

What job categories do people searching Senior Backend Developer jobs in Harrison, NJ look for?

The top searched job categories for Senior Backend Developer jobs in Harrison, NJ are:

What cities near Harrison, NJ are hiring for Senior Backend Developer jobs?

Cities near Harrison, NJ with the most Senior Backend Developer job openings:

Senior Backend Developer jobs near you
Infographic showing various Senior Backend Developer job openings in Harrison, NJ as of August 2026, with employment types broken down into 79% Full Time, 3% Part Time, and 18% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $146,465 per year, or $70.4 per hour.

Senior+ Backend Engineer

Hapiko

Brooklyn, NY • On-site

Full-time

Re-posted 20 days ago

Job description

Job Summary:
Hapiko is a Brooklyn-based company building the future of play. They are seeking a Senior Backend Engineer to own and evolve the real-time infrastructure behind Stickerbox, an AI-powered voice-to-sticker printer, while managing thousands of concurrent connections and orchestrating machine learning pipelines.
Responsibilities:
• Own, evolve, and scale the real-time infrastructure behind Stickerbox: an AI-powered voice-to-sticker printer already serving thousands.
• Architect and maintain the systems that connect thousands of devices, manage real-time audio pipelines, and power the experiences that make everything just work.
• Monitor and observe to keep our infrastructure healthy.
• Design and implement fastAPI services for device auth, user management, and webhook integrations.
• Create secure RESTful APIs that are a joy to work with.
• Integrate reliably with external ML services and build data pipelines that feed our evaluation systems.
• Develop CI/CD pipelines that give the team confidence to ship fast.
• Make architecture decisions that balance performance, cost, and maintainability.
• Develop alerts, runbooks, and on-call practices that let the team sleep at night.
Qualifications:
Required:
• 5+ years building and shipping backend systems in Python
• Deep experience with FastAPI and asyncio patterns
• Strong PostgreSQL skills, including schema design
• Hands-on experience with Redis (caching, queues, pub/sub)
• Track record of designing reliable distributed systems
• A DevOps mindset, comfortable deploying, monitoring, and scaling
• Experience with GenAI/LLM pipelines deployed in production
• Clear communication skills; can translate technical tradeoffs for the team
Preferred:
• Worked with Elixir/Phoenix and enjoy managing concurrency
• Built software for IoT or custom hardware devices
• Managed real-time systems and streaming data
• Experience with streaming protocols and media formats
• Tuned ML pipelines with prompt engineering and evals
Company:
Hapiko develops AI-powered consumer software products that enhance digital experiences for users. Founded in 2025, the company is headquartered in New York, USA, with a team of 2-10 employees. The company is currently Early Stage.

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