Senior Software Developer

This position has an On-Site Requirement in Teaneck NJ

Interstate Waste Services is the most progressive and innovative provider of solid waste and recycling services in the greater New York, New Jersey and Connecticut markets with a rail-served landfill in Ohio.  IWS is committed to delivering high-quality waste, recycling and environmental services, while prioritizing the safety of our employees, customers and communities. We cater to a diverse range of industrial, medical and commercial/residential customers.

Founded in 1998, IWS has grown over the years through acquisitions, many of which were family-owned businesses that remain a part of our team today. We’re proud to combine the resources of a large company with the values and care of a family-run business.

The Senior Software Developer is responsible for the analysis, design, development, testing, implementation, and maintenance of enterprise-scale, business-critical applications. This hands-on role partners closely with business stakeholders to translate operational and strategic requirements into scalable technical solutions. The position contributes to architectural decisions, system integrations, and development standards while providing mentorship and technical guidance.

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily.  Other duties may be assigned. 

• Design, develop, test, implement, and maintain business-critical applications and workflows using Microsoft .NET technologies.
• Analyze user and business requirements to define technical specifications and scalable solution designs.
• Translate functional requirements into intuitive, efficient, and maintainable application workflows.
• Develop and maintain RESTful APIs and lead integrations across internal and SaaS platforms.
• Write, optimize, and maintain SQL queries, stored procedures, and relational database structures.
• Create and maintain system design documentation, technical specifications, and architectural diagrams.
• Review peer code, architecture, and documentation to ensure quality and adherence to standards.
• Contribute to development standards including source control, CI/CD, deployment, and environment management.
• Support performance tuning and scalability initiatives for high-concurrency applications.
• Assist in maintaining technical artifacts such as data dictionaries and application catalogs.
• Collaborate cross-functionally with IT and business stakeholders to deliver effective solutions.
• Monitor emerging technologies and recommend improvements to enhance performance and usability.
• Maintain detailed documentation and prepare release notes for enhancements.
• Participate in critical decisions related to architecture, integrations, and software selection.

• Required:
• Minimum (5) five years of experience in a developer role in full stack environment
• Robust Experience with  C# programming, and .Net 8+
• Knowledge on SQL queries, SQL Server, and relational database technology.
• Experience with Rest API development, integration knowledge and middleware integration expertise.
• Experience developing critical applications with large concurrent user bases from a performance and scalability standpoint
• Experience with Azure cloud services.

• Preferred
• Experience with Blazor.
• Experience with CI/CD pipelines, and Azure DevOps.
• Experience with finance and payment solutions.
• Experience with mobile app development.
• Must have experience in the analysis, design, development, testing and implementation of enterprise scale apps.
• Ability to handle change, multitask and keep up with a fast pace and consistently growing environment.
• Strong problem solving and creative skills and the ability to exercise sound judgment and make decisions based on accurate and timely analyses.
• Should have requirement gathering and documentation experience.
• Should be able to work closely with the business stakeholders and work towards the solutioning of the requirements.
• Effective written and verbal communication.
• Experience developing or maintaining customer facing hybrid web applications preferred.

This job description is intended to be an accurate representation of the general functions of the job, rather than exhaustive list of duties, responsibilities, or experience. Other duties may be assigned, requested, or required. Aspects of the job may be altered without notice.

Interstate Waste Services provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.