Scale Army Careers - Senior Fullstack Engineer
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Requirements
• 5+ years building production Ruby on Rails APIs (Rails 7+), with deep familiarity with ActiveRecord, Sidekiq, RSpec, JWT/auth flows, and PostgreSQL schema design. • 5+ years • Ruby on Rails • ActiveRecord • Sidekiq • RSpec • 5+ years building production React applications using hooks and modern state management patterns. • 5+ years • React • TypeScript and modern JS toolchains including Bun, Vite, and esbuild. • esbuild • Production Python (3.11+) experience, ideally with Dagster, Airflow, or similar orchestration frameworks. • Python (3.11+) • Dagster • Airflow • Hands-on experience contributing to ETL pipelines, Snowflake transformations, and external API integrations. • ETL pipelines • Snowflake • Experience with Docker, Docker Compose, and container-based local development workflows. • Docker • Docker Compose • Working knowledge of AWS services (ECS Fargate, Lambda, EventBridge, S3) and infrastructure-as-code via Terraform. • Terraform • Experience with CI/CD pipelines using GitHub Actions and a strong understanding of observability practices. • CI/CD pipelines • GitHub Actions • Track record of writing technical specs, RFCs, or architecture documentation in a cross-team environment. • Strong architectural thinking across backend, frontend, and data systems — able to spot patterns and risks across services. • Bias toward simplicity: removes code and abstractions as readily as adding them. • Comfortable operating autonomously in a multi-repo, fast-moving codebase alongside AI coding agents. • Mentorship mindset — makes the team around them better through review, documentation, and pairing rather than heroic individual contribution. • Strong opinions loosely held on testing strategy, dependency management, and incremental refactoring. • Judgment to know when to standardize across services and when to let a service stay appropriately opinionated. • Comfortable working in ambiguity and driving clarity through documentation and communication. • Opportunity • This is a rare opportunity for a polyglot senior engineer to have genuine architectural ownership across an entire product platform — not just one slice of the stack. You will work at the frontier of AI-assisted software development, shaping how engineers and AI agents collaborate in a production environment, while directly influencing the engineering culture and practices of a growing, technically ambitious team. The role offers a competitive base compensation of $4,000–$5,000 per month, full remote flexibility, and the chance to make a lasting mark on a platform that sits at the intersection of machine learning, marketing intelligence, and modern software engineering. • Application Process: • To be considered for this role these steps need to be followed: • Fill in the application form • Record a video showcasing your skill sets
Responsibilities
• Backend Development • Backend Development • Design and ship production features on the Ruby on Rails API, including authentication flows, background jobs via Sidekiq, and PostgreSQL schema design. • Ruby on Rails • Sidekiq • Maintain and improve API contracts using OpenAPI or JSON:API standards consumed by SPA frontends. • OpenAPI • JSON:API • Write and enforce test coverage using RSpec, maintaining high reliability across services. • RSpec • Frontend Development • Build and maintain React applications using hooks and modern state management patterns. • Work confidently with TypeScript, modern bundlers, and JS toolchains including Bun, Vite, and esbuild. • TypeScript • esbuild • Contribute to and evolve a shared component library and design system. • Python & Data Platform • Contribute to ETL pipelines, Snowflake transformations, and external API integrations. • Snowflake • Work with orchestration tools such as Dagster or Airflow to manage data workflows in production. • Dagster • Airflow • Partner with Data Science and ML Engineering teams to productionize models into reliable, observable inference services. • Infrastructure & DevOps • Maintain and improve container-based local development using Docker and Docker Compose. • Docker • Docker Compose • Operate within an AWS environment (ECS Fargate, Lambda, EventBridge, S3) and support infrastructure managed via Terraform. • Terraform • Own and improve CI/CD pipelines using GitHub Actions and drive pragmatic observability across services. • CI/CD pipelines • GitHub Actions • Engineering Leadership & Developer Experience • Establish and enforce engineering best practices across a 20+ repo workspace, covering testing strategy, CI/CD, observability, and code review standards. • Improve developer experience through local dev tooling, Makefile automation, and onboarding documentation. • Makefile • Lead code reviews and PR triage; drive improvements in type safety, security, and incremental refactoring. • Write clear specs, RFCs, and architecture docs — including agent-readable context files for AI coding agent workflows using tools like Claude Code or Cursor. • Claude Code • Cursor • Mentor engineers through pairing, documentation, and review rather than gatekeeping.
Benefits
• $4K – $5K per month • Final compensation is set after evaluating experience and location. • This role is open to candidates based in LATAM, Africa, and Eastern Europe. Please note that as this role supports U.S.-based clients, candidates must be available to work during U.S. business hours aligned with the client’s time zone.
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