Senior Web Developer

trilongroup; Seattle (WA); On-site; USD 110,000 - 160,000; Full time

Job summary

Alta Planning + Design seeks an experienced Senior Web Developer (Web Developer III) to join the Web and Digital Studio within our TDM Marketing & Creative Services team. This hands-on role delivers complex websites, web apps, and data‑driven tools while collaborating with designers, GIS staff, planners, and project teams across the firm.

The Senior Web Developer will build reliable, accessible, and maintainable solutions across diverse environments, combining full‑stack development, systems

Job description

Alta Planning + Design seeks an experienced Senior Web Developer (Web Developer III) to join the Web and Digital Studio within our TDM Marketing & Creative Services team. This role is ideal for a highly skilled, hands-on developer who can independently deliver complex websites, web applications, interactive and data-driven tools, and other digital products while collaborating closely with designers, marketers, GIS and data staff, planners, and project teams across the firm.

The Senior Web Developer will play a key role in expanding Alta’s digital capabilities by building reliable, accessible, and maintainable solutions across a range of technical environments. The role combines full-stack development, systems integration, technical problem-solving, QA/QC, and project collaboration, with opportunities to contribute to emerging digital services, data-intensive applications, and the continued evolution of Alta’s web and digital practice.

About Alta’s TDM Marketing & Creative Services Group

Alta’s Marketing & Creative Services team brings together strategists, marketers, designers, and digital developers to help clients communicate complex ideas, engage audiences, and inspire action. Our work spans branding, campaigns, communications, graphic design, digital strategy, websites, interactive tools, and technology-enabled experiences.

Within this team, the Web and Digital Studio supports web-based and digital products and services across Alta’s client portfolio. The team partners closely with Marketing & Creative Services staff as well as planners, engineers, GIS specialists, civic data analysts, and project teams across the firm to create digital solutions that support both client needs and Alta’s broader services. As our digital work expands, the team is increasingly working across full-stack development, data visualization, APIs and system integrations, marketing technologies, automation, GIS-enabled tools, and other emerging digital applications.