Senior Full Stack Web Developer

We’re Watts. Together, we’re reimagining the future of water. We feel proud every day about what we do. We're all part of the same crucial mission, no matter what function we support -- it's to provide safe, clean water for the world, and to protect our planet's most valuable resource. What we do: For 150 years, Watts has built best-in-class products that are trusted by customers in residential and commercial settings across the world. We are at the forefront of innovation, working with cutting-edge technology to provide smart and connected, sustainable water solutions for the future. Watts is a leading brand with a quality reputation — and we have a dynamic future ahead. Scope of Position We are seeking an experienced Senior Full Stack Web Developer with a strong backend focus—particularly in C# .Net Framework, .Net Core, PHP, and SQL—to architect, build, and maintain scalable, high‑performance web applications and services. While this role includes some frontend responsibilities, the emphasis is on backend systems, API development, data modeling, system integrations, and cloud‑based application architecture. The ideal candidate brings deep technical expertise, strong problem‑solving skills, and the ability to lead backend design decisions across complex systems. Primary Job Duties and Responsibilities Build and maintain scalable backend services and microservices using API routes) with C# .Net Framework, .Net Core, PHP, and SQL applications Architect, design, and optimize RESTful and/or GraphQL APIs for internal and external consumption Develop, optimize, and maintain SQL‑based data models, schemas, queries, and stored procedures Implement workflow‑driven business processes, system integrations, and backend automation Ensure backend systems meet high standards for performance, reliability, security, and maintainability Design and maintain backend infrastructure supporting CI/CD pipelines and cloud deployments Collaborate with frontend developers, product owners, and UX/UI teams to ensure seamless integration between backend services and user interfaces Contribute to architectural decisions across backend, database, and integration layers Write clean, well‑documented, testable backend code; participate in code reviews and enforce backend best practices Mentor junior developers, especially in backend engineering, API design, and database development Participate in Agile ceremonies, estimation, and backlog refinement Required Qualifications Bachelor’s degree in computer science, Engineering, or equivalent professional experience 7+ years of professional software development experience, with a strong emphasis on backend engineering Strong proficiency in JavaScript and TypeScript Professional experience developing and maintaining PHP applications and services Strong SQL expertise, including schema design, query optimization, indexing, and performance tuning Experience with relational databases such as SQL Server, MySQL or PostgreSQL Experience designing and consuming APIs (REST and/or GraphQL) Experience implementing backend workflows, integrations, and automation Familiarity with modern build tools and package managers (e.g., Vite, Webpack, npm, pnpm) Experience with cloud platforms (Azure, AWS, or GCP) and CI/CD workflows Solid understanding of backend security, authentication, authorization, and secure coding practices Strong problem‑solving, debugging, and communication skills Experience using AI‑assisted coding tools (e.g., GitHub Copilot, Microsoft Copilot) to improve development efficiency and code quality Preferred Qualifications Experience with Next.js or other React‑based frameworks (for integration with backend services) Experience modernizing or integrating legacy PHP systems Experience contributing to or maintaining backend libraries, shared services, or internal tooling Experience with Docker and containerized deployments Knowledge of automated testing tools (testRigor, Cypress, Playwright, or backend‑focused testing frameworks) General Applicable Company Competencies Commitment to Watts’ values of integrity, accountability, continuous improvement and innovation, and transparency. Punctuality and dependability. Ability to be flexible and adapt to changing work priorities and stressful conditions. Adherence to all personnel policies, procedures, and standards of process as implemented by Watts. Maintain productive and collaborative relationships with other Watts employees. Adherence to Watts’ seven cultural beliefs: Growth Mindset, Customer-Focused Innovation, Constant Communication, Clear Goals, Collaborate Globally, Be Inclusive, and Take Action. Working Conditions: While performing the job duties, you will be working remotely in an office environment. You may be required to occasionally travel to and work in the office at the Andover location for meetings, trainings, or as otherwise required by Company management. Physical Requirements: Specific physical abilities required for this position include, but are not limited to: Ability to remain seated at a desk or workstation for extended periods. Ability to perform repetitive tasks like typing on a keyboard or using a mouse for extended periods. Ability to physically move around the office, organize or transport files, packages, or other office-related materials. Ability to read documents, use a computer, and perform data entry tasks. Ability to communicate clearly with management and coworkers, particularly in meetings or phone calls. Ability to operate standard office equipment such as computers, printers, phones, and copiers. Ability to occasionally lift and carry light objects, such as office supplies, documents, or small equipment. Pay Range The expected salary range for this position is $124,000 - $138,000 yearly. Actual compensation will be dependent upon individual skills, experience, qualifications, and applicable law.” Nothing in this job description restricts Watts’ right to assign or reassign duties, responsibilities, and working hours/conditions to this position at any time. This position is “at will,” which means that either the employee or Watts may terminate the employment relationship at any time, with or without notice, and for any lawful reason. #LIRemote Watts in it for you: Please note that the following benefits apply only to permanent roles and do not apply to internship roles. Competitive compensation based on your skills, qualifications and experience Comprehensive medical and dental coverage, retirement benefits Family building benefits, including paid maternity/paternity leave 10 paid holidays and Paid Time Off Continued professional development opportunities and educational reimbursement Additional perks such as fitness reimbursements and employee discount programs Learn more about our benefit offerings here: How we work: At Watts, our culture is team-oriented and supportive. Employees here genuinely care about the quality of their work, and about each other. Our people are the heart of who we are and contribute to our longevity and continued success. And this is a place where you can have a big career. No matter your role, there are opportunities for learning and development, and your daily contributions make a meaningful impact on the lives of people who use our products and on the future of water. Watts is committed to equal employment opportunity. We follow a policy of administering all employment decisions and personnel actions without regard to race, color, religion, creed, sex, pregnancy, national origin, sexual orientation, age, physical or mental disability, genetic disposition or carrier status, marital status, military or veteran status, minorities, or any other category protected under applicable federal, state, or local law. Consistent with the obligations of state and federal law, Watts will make reasonable accommodations for qualified individuals with disabilities. Any employee who needs a reasonable accommodation should contact Human Resources. Watts Water is a global leader of quality water solutions for residential, industrial, municipal, and commercial settings. Our family of brands offers some of the most varied product lines in the world, with world-class, water-related solutions focused on: Drainage and Water Reuse HVAC and Hot Water Plumbing and Flow Control Water Quality and Rainwater Harvesting We are a $1.9 billion global company, listed on the New York Stock Exchange (NYSE) with a presence in five (5) continents and twenty-four (24) countries, and an employee population that speaks over eighteen (18) languages. As a people-first company, we prize enriching and caring for all who work here not only through words but through actions. This includes executing our Diversity, Equity, and Inclusion (DEI) strategy, and providing our employees with meaningful career growth opportunities, a positive and safe work environment, and affirmation that they are heard, valued, and respected. We are proud to be an organization that believes that a safer world is a more sustainable world – a belief that we proudly reflect in each of our technologies and solutions and our environmental and social commitments, such as our partnership with Planet Water Foundation. Learn more about the Watts way, here. Specialties Plumbing, HVAC, Water Quality, and Gas Headquarters Americas & Corporate Headquarters: North Andover, Massachusetts, USA Asia-Pacific, Middle East & Africa (APMEA) Headquarters: Shanghai, China Company Size About 5,000 employees Website Industry Machinery Founded 1874