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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer II, AI Developer Foundations - **Company:** SimplePractice, LLC. - **Location:** Santa Monica, CA, United States - **Experience:** Expert - **Salary:** $208,000.0 - $260,000.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Programming Tools, Ember.Js, Github, MySQL, Ruby on Rails, Redis, Datadog, Large Language Models, Kubernetes, Information Technology, Terraform, Docker - **Published:** August 2, 2026 - **Apply:** https://jobs.localjobnetwork.com/apply/add/87915200/1 ## About the Role * BS/MS in Engineering, Computer Science, or related field, or equivalent experience * 7+ years building production software and then maintaining it. You've shipped something, lived with the decisions, and found out whether a design decision held up * Strong problem-solving and communication skills; comfortable in fast-paced, cross-functional environments Ruby on Rails * Recent, direct Rails experience in a large codebase. * Ability to read unfamiliar application code quickly and judge whether what an agent produced in it is any good AI-Assisted Engineering * LLM-backed systems you've shipped to users and kept running, past the point where better prompting stops helping * Experience building context or memory handling, and writing evals * Judgment about what belongs in code and what belongs in the model * Track record evaluating tools with evidence Developer Tooling & Enablement * Internal tools, platforms, conventions or workflows that other engineers chose to use. * CLI and harness-shaped software, and comfort connecting systems over APIs * Strong writing. Much of this role is getting other people to work differently, which happens through docs and worked examples rather than announcements * Comfort working outside engineering, explaining technical constraints to people who don't share your background and taking their pushback seriously Bonus Points * Agent harnesses, MCP servers, orchestration frameworks * Healthcare or another HIPAA-regulated environment * AWS, Terraform, Kubernetes, Docker * Experience on a platform or infrastructure team where the customers were other engineers * Having overbuilt a platform once before the workflows existed, and learning to spot the warning signs earlier Our Stack * Ruby on Rails monolith, Aurora MySQL, Redis, Sidekiq, Ember.js, AWS (EKS, Bedrock and more). Linear, GitHub, Semaphore, Datadog, LaunchDarkly. ## Description Engineers on the AI Developer Foundations will build the tools that build the product. It's a new team that owns how AI gets used inside engineering, product, and design at SimplePractice: the conventions for using these tools, the context agents read before they touch our code, the bar generated work has to clear before a human spends time on it, and the training that makes AI a useful tool to all of engineering. This is a hands-on role reporting to the VP of Technology. You'll write code most days, mostly in and around a large Rails monolith, and you'll also write the conventions other engineers follow. Responsibilities * Own the context layer agents read: rules files, docs conventions, grounding data, with CI and named owners keeping it current * Publish the standards for how we prompt coding agents, how we supply context, and what a spec needs to contain before it's worth handing to an agent * Define the review gates any AI-generated artifact clears before a human spends time on it, and get what reviewers catch flowing back into the conventions * Take the prototypes running today and turn the ones that hold up into supported workflows that run for someone other than their author * Evaluate harnesses, models and vendors against criteria and eval sets * Work the product-to-engineering handoff with PMs, designers and EMs * Teach. Documentation, worked examples, office hours, and time sitting with a squad while they work with the tools we build * Help us draw the boundaries for where an agent runs unattended, where a human signs off, and where we don't use one at all ## Related Videos - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Bringing AI Model Testing and Prompt Management to Your Codebase with GitHub Models](https://www.wearedevelopers.com/videos/1536-bringing-ai-model-testing-and-prompt-management-to-your-codebase-with-github-models) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 137 - AI'm not sure about this](https://www.wearedevelopers.com/magazine/485-dev-digest-137-ai-m-not-sure-about-this) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [From Prototype to Production: Build AI Agents with This Free 4-Course Learning Path](https://www.wearedevelopers.com/magazine/655-from-prototype-to-production-build-ai-agents-with-this-free-4-course-learning-path) - [What is Software Engineering in the Age of AI?](https://www.wearedevelopers.com/magazine/640-what-is-software-engineering-in-the-age-of-ai)