Sr. Application Developer

Esrtreit; New York (NY); On-site; USD 125,000 - 180,000; Full time

Benefits offered by this job

Health insurance

401(k) with 100% match up to 5%

Paid time off

Flex remote work time

Job summary

ESRT seeks a Sr. Application Developer to drive modernization of enterprise systems spanning Marketing, Finance, IT, HR, and more. You will lead design, development, and deployment across the full SDLC and deliver scalable integrations and AI‑driven capabilities.

You’ll collaborate with IT and business stakeholders, modernize legacy platforms, and implement solutions aligned with ESRT’s strategic vision. Strong API, Salesforce, ETL, BI tools, and DevOps practices are essential.

Qualifications

• Deliver high‑quality, reliable software solutions.
• Strong problem‑solving and communication with cross‑functional teams.
• Translate business needs into technical solutions and roadmaps.
• Agile mindset with ability to adapt to changing priorities.

Responsibilities

• Lead all phases of the software development lifecycle.
• Design scalable, secure, and high‑performing enterprise applications.
• Develop integrations, APIs, and services between systems.
• Prototype and implement AI/automation capabilities in deployments.
• Create and maintain technical documentation and CI/CD practices.
• Collaborate with cybersecurity, network, and PM teams to deliver solutions.

Skills

Python

C#

Java

C++

API design

Salesforce customization

ETL

Tableau

Power BI

Git

CI/CD

RPA

AI/ML concepts

Education

Bachelor's degree in computer science or related field

Master’s degree in computer science or IT

Tools

Salesforce

Tableau

Power BI

Git

Job description

Position Summary

The Sr. Application Developer will play a key role within a dynamic technology team, driving the advancement of enterprise systems that support a broad range of business functions, including Marketing, Public Relations & Digital, Accounting, IT, Project Management, Property Management, Leasing, Legal, Sustainability, FP&A, Investments & Acquisitions, HR, and more.

This individual will collaborate closely with both IT and business stakeholders to design, develop, and implement scalable applications and integrations that enable critical business initiatives. The role will begin with enhancing and optimizing existing systems and processes, with a clear path toward leading modernization efforts, re-architecting legacy platforms, and delivering innovative technology solutions aligned with the organization’s long-term strategic vision.

Responsibilities

• Take a lead role across all phases of the software development lifecycle, from design through deployment and ongoing application support.
• Contribute to architectural decisions and design discussions to ensure applications are scalable, maintainable, secure, and high performing.
• Troubleshoot and resolve complex software issues by identifying root causes and implementing effective solutions.
• Support, maintain, and enhance existing enterprise applications to ensure reliability, performance, and alignment with evolving business needs.
• Design and develop integrations, APIs, and services that connect internal systems and external platforms.
• Provide support in designing, prototyping, building, and maintaining Salesforce.com applications and customizations.
• Collaborate with the Application Development team to research, prototype, and implement emerging technologies, including AI‑driven capabilities such as MCP Servers, machine learning models, intelligent automation, and large language models (LLMs).
• Identify opportunities to incorporate AI and intelligent automation into enterprise systems to improve operational efficiency and decision‑making.
• Design and develop ETL processes, including data extraction, transformation, and loading, supporting enterprise data workflows and integrations.
• Develop and support interactive dashboards and reporting solutions using business intelligence tools such as Tableau or Power BI.
• Design and develop Robotic Process Automation (RPA) solutions to automate repetitive and rule‑based business processes.
• Ensure the quality and reliability of software through testing, validation, and continuous improvement practices.
• Utilize Git for version control and apply DevOps and continuous integration/continuous deployment (CI/CD) best practices.
• Create and maintain technical documentation for applications, integrations, and system processes.
• Stay current with industry trends, particularly in AI, automation, and enterprise application development, and advocate for adoption of best practices and modern technologies.
• Work closely with cross‑functional teams including cybersecurity specialists, network engineers, business analysts, and project managers to deliver high‑quality technology solutions.
• Collaborate with onshore and offshore developers to support multiple applications and technologies.
• Work with leadership and business stakeholders to understand organizational goals and translate business needs into technical solutions.
• Participate in and contribute to an agile development environment.

Qualifications

• Deliver high‑quality, reliable solutions that meet project requirements and are implemented within expected timelines.
• Demonstrate strong problem‑solving abilities, clear communication of technical concepts, and effective collaboration with cross‑functional teams.
• Collaborate with business stakeholders and end‑users to provide solutions that meet operational needs and improve existing systems.
• Ability to adapt in an agile environment, understand the evolving needs of different business units, and deliver technology solutions that support the organization’s broader strategic goals.
• Strong programming skills in languages such as Python, C#, Java, or C++.
• Strong experience in API design, development, and system integrations.
• Proven experience designing scalable, maintainable, and high‑performance enterprise applications.
• Solid understanding of application architecture patterns and modern software development best practices.
• Experience with software testing methodologies and test‑driven development (TDD).
• Experience with Salesforce customization, configuration, APIs, and application development.
• Proficiency with Git, version control systems, and DevOps principles.
• Experience working with ETL tools, data pipelines, and data warehousing concepts.
• Proficiency with business intelligence and analytics tools such as Tableau or Power BI.
• Experience developing Robotic Process Automation (RPA) or workflow automation solutions.
• Strong understanding of database architecture, data modeling, and relational databases.
• Familiarity with AI or machine learning concepts, including experience integrating AI services, machine learning models, or large language models (LLMs) into applications.
• Interest in applying AI, automation, or intelligent technologies to enhance enterprise applications and business processes.
• Ability to understand and translate business processes and requirements into technical solutions.
• Experience creating clear and concise technical documentation.
• Experience working in agile development environments.
• Ability to work both independently and collaboratively within a team environment.
• A bachelor's or master’s degree in computer science, Software Engineering, or Information Technology.
• 5–7 years’ experience in application development.
• Experience in Real Estate, Finance or Attractions, Tour and Travel is a plus.
• Prolonged periods of sitting at a desk and working on a computer.
• Must be able to lift up to 15 pounds at times.

Company Culture & Success Factors

• Adaptable – you are a self‑starter who’s able to quickly digest and execute new processes to work both collaboratively and independently.
• Dynamic – you are solutions‑oriented, aim to improve processes and implement efficiency, and offer insightful feedback to improve ESRT.
• Dependable – you take a strong sense of ownership and accountability over your work.
• Passionate – you keep up with industry trends and are excited about the potential to propel the industry forward with a “roll‑up‑your‑sleeves” attitude.
• Curious – you consistently look for new ways to work smarter, not just harder.
• Ethical – you treat others with respect, act with integrity in how you perform your work, and embrace our collaborative culture.
• Positive – you possess a service‑oriented attitude with excellent follow through.

Benefits

• Competitive base salary and bonus.
• Health/Dental/Vision insurance.
• Company‑sponsored Life, AD&D, STD (with Salary Continuation), and LTD insurance.
• Voluntary Enhanced LTD Program.
• Voluntary Hospital, Accident, and Cancer Programs.
• 401(k) with 100% match up to 5%.
• Paid parental leave.
• Pre‑tax transit accounts.
• Employee Assistance Program for emotional, financial, and legal support.
• Generous paid time off.
• Flex remote work time.
• Flex Summer Fridays.
• Employee engagement programs.
• Volunteer time off.
• Continuing education.
• Complimentary Empire State Building Observatory access.
• Complimentary gym membership and other wellness benefits.
• Employee Discount Programs.

Equal Opportunity Employer

ESRT is an equal opportunity employer and is committed to providing a workplace free from harassment and discrimination. We celebrate the unique differences of our employees because they drive curiosity, innovation, and the success of our business. We do not discriminate based on race, religion, color, creed, national origin, sex, sexual orientation, gender identity or expression, reproductive choices, age, marital status, veteran status, disability status, pregnancy, parental status, caregiver status, genetic information, political affiliation, or any other status protected by the laws or regulations in the locations where we operate. This policy applies to all aspects of employment, including hiring, promotion, demotion, compensation, training, working conditions, transfer, job assignments, benefits, layoff, and termination. Reasonable accommodations that do not create an undue hardship for the Company are available for applicants and employees with disabilities or sincerely held religious beliefs.