Senior Mern Stack Developer Jobs in Salem, UT (NOW HIRING)

Location: Onsite (hybrid work a potential) — Springville, Utah
Employment Type: Full-Time
Experience Level: Senior

Rustica is a design and manufacturing company known for custom doors, hardware, and home products. As Rustica expands into a broader home furnishings brand, technology plays an increasingly important role in customer experience, product configuration, order processing, manufacturing, and business operations.

Rustica’s technology ecosystem includes a customer-facing e-commerce storefront, an internal commerce administration platform, a manufacturing and operations platform, and the AWS and Cloudflare infrastructure supporting these applications.

We are seeking a Senior Software Engineer capable of taking technical responsibility for business-critical production systems. This position requires someone who can build new capabilities, improve existing applications, identify architectural risks, and ensure that Rustica’s software and infrastructure remain secure, reliable, and maintainable.

The Senior Software Engineer will serve as a hands-on Technical Lead for Rustica’s customer-facing commerce platform and the supporting systems that connect customers, employees, business operations, and manufacturing.

The primary focus of this position is Rustica’s revenue-critical e-commerce storefront, including product configuration, pricing, cart, checkout, payments, customer accounts, content, and order processing. The engineer will also contribute to Rustica’s internal commerce administration platform and its manufacturing and operations platform, which is being developed to manage production workflows, employee activity, time tracking, operational reporting, and other internal business processes.

This role is also responsible for the AWS and Cloudflare infrastructure supporting Rustica’s applications. This includes deployment, security, monitoring, scheduled workloads, DNS, content delivery, backups, recovery, and production incident response.

This is a hands-on individual-contributor role with technical leadership responsibilities. The Technical Lead designation refers to ownership of architecture, engineering quality, and production reliability; it does not necessarily include direct people management.

This is not solely a feature-development or prototype-building position. The engineer must be able to evaluate existing and rapidly developed code critically, identify unsafe or fragile architecture, and implement production-quality solutions that preserve security and data integrity.

AI-assisted development tools may be used, but the engineer remains responsible for validating architecture, correctness, security, performance, maintainability, and production readiness.

• Develop, maintain, and improve Rustica’s customer-facing e-commerce storefront.
• Support complex configurable products involving options, dependencies, dimensions, pricing, discounts, lead times, parts, and bills of materials.
• Own critical customer workflows including product configuration, cart, checkout, payment, account registration, trade accounts, order history, and order creation.
• Maintain integrations with payment processors, tax providers, authentication systems, transactional email services, analytics platforms, and other external services.
• Protect the correctness and security of revenue-critical payment and checkout workflows.
• Design appropriate protections against duplicate payments, card-testing activity, fraudulent transactions, repeated submissions, and inconsistent order state.
• Improve storefront performance, accessibility, mobile usability, SEO, reliability, and customer experience.
• Diagnose and resolve production problems affecting customers, payments, pricing, or orders.

• Design and maintain secure APIs connecting the storefront, administrative systems, manufacturing operations, and third-party platforms.
• Establish clear system boundaries and data contracts between applications.
• Design and maintain PostgreSQL schemas, migrations, queries, indexes, constraints, and transactional workflows.
• Build systems that remain correct during concurrent requests, retries, partial failures, duplicate events, and third-party outages.
• Prevent duplicate payments, duplicate order submissions, conflicting updates, partial data writes, and inconsistent state between systems.
• Build reliable background jobs, queues, scheduled processes, retry policies, and failure-recovery workflows.
• Evaluate existing architecture and identify security, reliability, performance, and maintainability risks.
• Improve or replace fragile architecture without unnecessarily disrupting working production systems.
• Establish automated testing around revenue-critical and operationally critical behavior.
• Lead architecture reviews and maintain practical engineering standards.
• Review code for correctness, security, maintainability, and alignment with established architecture.

• Maintain and improve the internal platform used to manage products, product configurations, pricing, orders, customers, content, promotions, and operational settings.
• Build tools that allow non-technical employees to manage complex commerce data safely.
• Improve permissions, audit history, conflict handling, validation, and data-integrity protections.
• Develop integrations connecting commerce data with ERP, manufacturing, marketing, shipping, accounting, and reporting systems.
• Automate repetitive business processes while preserving appropriate review, audit, and recovery controls.
• Ensure administrative changes cannot unintentionally compromise storefront behavior or production data.

• Contribute to the architecture and development of Rustica’s manufacturing and operations platform.
• Build systems for manufacturing order intake, production workflows, work assignments, employee activity, time tracking, material usage, exceptions, and operational reporting.
• Create trustworthy data models for measuring manufacturing cycl