We are seeking a full-stack engineer who operates at the nexus of product development, growth optimization, and process automation. If you possess the ability to resolve complex technical issues efficiently, construct maintainable Next.js/React applications that withstand rigorous regression testing, and configure Firebase/GCP infrastructure while ensuring accurate attribution data flows from Meta Pixel and Google Tags, your work will directly enhance conversion tracking capabilities and reduce manual operational overhead.Your core mission is clear: maintain system stability, ensure the growth infrastructure remains measurable, and eliminate repetitive manual processes through automation. We do not develop "platforms" as isolated initiatives. Instead, we connect engineering directly to marketing and product functions so that decisions are informed by instrumented conversion funnels. This translates to dependable deployments, real-time performance monitoring, trustworthy tracking mechanisms, and rapid iteration cycles measured in days rather than weeks.This role combines building with maintaining. You will serve as the individual responsible for preserving foundational stability while accelerating team velocity—delivering fixes promptly, creating processes or utilities for recurring QA requirements, verifying changes through regression testing, and instrumenting user journeys so data integrity remains intact. If you are motivated by tangible impact, continuous learning, and the achievement of transforming a fragmented workflow into a streamlined system that empowers the entire organization, take ownership of this opportunity. Apply if you are prepared to own the reliability layer, the integration points, and the automation frameworks that enable the broader team to operate at higher speed.
What You Will Be Doing
- Core System Maintenance: Acquire understanding of system architecture, diagnose and resolve defects, and execute QA and release validation procedures
- Marketing Tool Integrations: Develop and sustain marketing tracking and attribution infrastructure leveraging Meta Pixel and Google Tags
- Automation: Construct scripts and monitoring dashboards, delegating the maximum feasible portion of your workload to automated processes
- Growth & Marketing Website Support: Sustain and improve Webflow and marketing properties
What You Won’t Be Doing
- Determining product strategy or executing growth experiments
- Developing entirely new features or backend architectures from the ground up
- Designing complex system architectures
JavaScript Developer Key Responsibilities
- Empower the Growth and Product teams to execute with greater speed and efficiency by enhancing conversion visibility and minimizing operational burden
Basic Requirements
- A minimum of 3 years of professional experience as a full-stack developer
- Demonstrated experience working with TypeScript, Next.js, React, and Node
- Background maintaining a direct-to-consumer technology product serving live users
- Hands-on experience with Firebase and the GCP stack
- Proven ability building Webflow websites and supporting A/B testing initiatives
About Legends
Legends is a confidence-training app that builds legendary kids. Designed for kids ages 7-11 and their parents, families receive 5-minute confidence "workouts" with inspiring videos about legendary people—from celebrated artists and athletes to trailblazing scientists—plus interactive exercises that reinforce the theme of the day. 5 minutes of practice a day, confidence for a lifetime.There is so much to cover for this exciting role, and space here is limited. Hit the Apply button if you found this interesting and want to learn more. We look forward to meeting you!
Working with us
This is a full-time (40 hours per week), long-term position. The position is immediately available and requires entering into an independent contractor agreement with Crossover as a Contractor of Record. The compensation level for this role is $30 USD/hour, which equates to $60,000 USD/year assuming 40 hours per week and 50 weeks per year. The payment period is weekly. Consult www.crossover.com/help-and-faqs for more details on this topic.Crossover Job Code: LJ-5703-IN-COUNTRY-JavaScriptDeve.002
