Senior Full Stack Software Developer Jobs in Nutley, NJ

About Us

Applecart is the leading technology company that C-suites rely on to reach business-critical decision makers. The most important decisions are made by the hardest people to reach and influence. Historically, C-suite leaders have lacked the tools to reach the stakeholders who matter most to their business. The C-suites of hundreds of Fortune 500 companies, major agencies, trade associations, nonprofits, and governments use Applecart to put their best content in front of business-critical decision makers and those they trust -  from policymakers and investors to CEOs, key employees, members of the media and more. Decision makers are informed by what they read, learn from advisors, hear from colleagues, and discuss with family and friends. To break through to them, you must reach them through the only channel that really moves them: those they know and trust. Applecart's platform uses publicly available data to map billions of social relationships between nearly every American adult and enable clients to deliver content directly to decision makers and those who matter most to them.

We are hiring a Senior Software Engineer in our New York office.

About the Role:

As a Senior Software Engineer, you will play a key role in building and enhancing Applecart's software platforms. Your work will span backend services, cloud infrastructure, and front-end applications, contributing to scalable, high-impact solutions. You will collaborate with a hybrid-remote team of skilled engineers to develop well-architected systems that drive business value, whether through API development, full-stack applications, or infrastructure improvements.

Who You Are

You are an experienced, adaptable software developer who thrives in an ambitious startup environment. You enjoy tackling complex technical challenges and are comfortable working across different areas of the stack. You are a strong collaborator, working effectively with engineers, product teams, and non-technical stakeholders. You take pride in writing clean, well-structured code and continuously seek ways to improve development practices.

What You'll Do

• Design, develop, and maintain well-tested, scalable software for backend services, APIs, and front-end applications
• Work closely with engineers, often through pair programming, to ensure high-quality code and system design
• Mentor junior developers, sharing best practices in coding, design, and debugging
• Collaborate with Product and UX teams to refine project requirements and enhance user experiences
• Contribute to architectural discussions and technical design decisions to drive the evolution of our systems
• Stay up to date with industry trends and emerging technologies to continuously improve our development practices

Experiences and Capabilities You Bring:

• 7+ years of professional software development experience across backend, full-stack, or infrastructure development
• Strong backend development skills, with expertise in multiple programming languages
• Experience building and deploying cloud-based applications, preferably on AWS
• Proficiency in infrastructure-as-code and DevOps best practices
• Strong technical leadership skills, leading by example in design, refactoring, testing, debugging, and troubleshooting
• Experience designing and implementing complex systems such as SOAs
• Strong computer science fundamentals and knowledge of development best practices (e.g., agile, clean code, test-driven development, CI/CD)
• Excellent technical communication skills

Preferred Qualifications:

• Proficiency in Python as a primary backend language
• Experience with front-end development, particularly React
• Familiarity with data engineering tools (e.g., Apache Spark) is a plus
• Ability to provision cloud resources using infrastructure-as-code

This is a hybrid role. Work from home on Monday and Friday and in Applecart's New York City office Tuesday through Thursday. 

Relocation assistance is not available for this position. Candidates must be based in or willing to relocate to the area independently.

Compensation:

Our compensation package consists of three components: (i) a base salary, (ii) annual cash bonus, and (iii) generous equity compensation.

The base salary range for this role is between $160,000 - 200,000, based on the candidate's experience and skills relative to the requirements listed above. The salary range provided is exclusive of discretionary annual cash bonus and equity compensation. The salary range provided for this role is specific to candidates located in the New York City area.

A few facts about us:

• Applecart's platform has been used by hundreds of industry-leading clients spanning Fortune 500 companies like Blackstone and Intuit, leading nonprofit organizations like the Environmental Defense Fund, and top-tier advertising and communications agencies like Teneo, FGS, Weber Shandwick, and OMD. 
• Applecart is growing quickly - over the last 4 years, we've increased our revenue by 10X, grown our headcount by almost 5X, and we're cashflow positive. 
• Our senior leadership team includes two members of the Forbes 30 under 30 list for Marketing and Advertising, the former Head of Product at Moat, Oracle's online ad measurement platform, a former senior White House advisor, early sales and talent leaders from Google and Twitter, two of the Democratic Party's most successful pollsters and strategists, and alums of top-tier organizations like Bain & Company, Amazon and Simpson Thacher.
• Applecart raised a $100M Series C from Blackstone's tech growth fund at the end of 2025. The company's other investors include Bain & Company, global sports, entertainment and marketing giant Endeavor, KKR Co-Founder Henry Kravis, entrepreneur Chris Burch, a founder of Palantir, senior engineering leaders at Twitter and Yelp, former Fortune 50 and advertising agency CEOs, and a number of well-known venture capitalists. Ari Emanuel, CEO of TKO and Executive Chairman of WME, Wayne Berman, Blackstone's Head of Global Government Affairs, and Risa Heller, CEO of HELLER, serve on our board. 
• Our work has been featured on Morning Joe on MSNBC, BloombergTV, and The Colbert Report, and in Axios, Semafor, BusinessWeek, the Associated Press, Forbes, the Washington Post, and Politico, among many others.