Freelance Full Stack Developer Node Js Jobs in Salt Lake City, UT

LOCATION: Lehi, UT

As a Full-Stack Developer at Opiniion, you'll help build and improve the products our customers use every day, working across the stack to ship features, improve reliability, and support a fast-moving product and engineering team. Our goal is to communicate key insights to our customers, so they can improve their properties. To accomplish this goal, you will build, maintain, and optimize our primary web application and the services that support it. We are looking for someone who will own meaningful areas of the product with little oversight, while effectively collaborating with the rest of the team.

• Work on a team of skilled engineers, writing code, reviewing pull requests, and participating in architectural and product discussions.
• Own backend API services, improving performance, security, and efficiency.
• Complete devops or frontend tasks when necessary for a project to succeed.

We expect engineers to use AI tools thoughtfully, to move faster and ship better work, while adhering to proven design and architecture principles. We use Claude and Cursor.

• 5+ years of professional software engineering experience.
• Strong Node.js API skills with experience of owning high-traffic services. You can demonstrate how your architectural and implementation decisions have improved performance, reduced bugs, and increased reliability. You have experience independently working in areas such as authentication, caching, and scalability.
• Strong SQL database skills. You understand the tradeoffs between different storage technologies and can explain why you chose one over the other. You are familiar with execution plans, specialized indexes, and query optimization, and have redesigned underperforming schemas or queries. You are willing to develop strong NoSQL skills.
• Frontend development skills. You know Vue, React, or Angular, and can make independent fixes and improvements while following existing architectural patterns.
• Experience with modern development tooling. You have worked with Docker, GitHub, and AWS, and understand how services such as ECS, Lambda, IAM, and S3 are used to build production systems. Experience troubleshooting local docker issues and CICD pipelines.

• You take ownership. You care deeply about the products you build, solving root causes instead of applying quick fixes.
• You collaborate effectively. You communicate proactively, share knowledge, surface risks early, give thoughtful feedback, and are comfortable challenging ideas when appropriate.
• You work independently. You take problems from start to finish, making sound decisions and asking for help when needed.

• Vue.js, Node.js (TypeScript and JavaScript), Python, React.js, and Ruby.
• PostgreSQL, Drizzle, and MongoDB.
• Docker, GitHub, CircleCI, and AWS.

• Experience building property management or review software.
• React, Ruby, or MongoDB.

At Opiniion, we take our work seriously, but we don't take ourselves too seriously! We work hard together, and we have a lot of fun doing it. We are a team that believes in real autonomy: you own your area, solve problems, and move fast enough to actually see the change you make. The people here are invested in each other just as much as they're invested in the work, and that combination is what makes this place different. We believe in collaboration, innovation, and building a team that truly cares—about our clients, their residents, and each other.

• Comprehensive healthcare plans, encompassing medical, dental, and vision insurance, along with group life coverage. Opiniion covers 40-90% of the premium cost for employees and all dependents.
• 401(k) retirement plan with a 100% corporate match on the first 1% and 50% match on the next 5%.
• Pre-tax Health Savings Accounts (HSA).
• Paid Parental Leave for all new parents (including adoption or foster care).
• Unlimited Time Off policies.
• 10 Paid Holidays annually.
• Monthly Wellness Reimbursement benefit.

*Note that the above benefits are available only to full-time employees of Opiniion*

Opiniion is an equal opportunity employer that is committed to diversity and inclusion in the workplace. We prohibit discrimination and harassment of any kind based on actual or perceived race, color, creed, religion, national origin, ancestry, citizenship status, age, sex or gender (including pregnancy, childbirth and pregnancy-related conditions), gender identity or expression (including transgender status), sexual orientation, marital status, military service and veteran status, physical or mental disability, genetic information, or any other characteristic protected by applicable federal, state or local laws and ordinances.