Senior Software Engineer, Apps & APIs

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Software EngineerSoftware Engineering

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Quick Summary

Key Responsibilities

Help take our MCP server from early-stage to production-grade: design decisions, implementation, and all the rough edges in between Contribute to our public APIs: clarity, consistency,

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Software EngineerSoftware Engineering

We're hiring a Senior Software Engineer to join Recast's Apps & API team: the engineers who own the customer-facing surface of our marketing mix modeling platform. That includes our flagship MMM application, agentic apps, public APIs, and MCP server. You’re a strong Python engineer who can hold their own in Ruby, navigate a Rails codebase, review PRs, and ship a fix when needed.

What you might do in your first 6 months:

Help take our MCP server from early-stage to production-grade: design decisions, implementation, and all the rough edges in between
Contribute to our public APIs: clarity, consistency, and best practices matter more than ever as our users are increasingly building AI-powered workflows
Build backends for agentic apps: the patterns for this greenfield work are still being defined and you'll have a strong voice in how we build
Work closely with the EM and your teammates to shape how this team builds: you’ll have real opportunity to help define what good looks like here, not just execute against it

Things you have experience in:

Strong Python engineer: you write idiomatic Python, design and ship production APIs in it, and it's your natural default
Comfortable enough in Ruby (Rails) to navigate the codebase, give useful PR reviews, and contribute without needing to be carried
Designing and shipping APIs with real external consumers: developer experience, versioning, and reliability are priorities for you
Shipping in an environment where "good enough to learn from" is a real engineering value, not a compromise
Hands-on experience with MCP and agentic AI patterns: you've built real tools, integrations, or apps in this space

Things that should excite you that might scare off other folks:

Building with emerging tech like MCP and agentic AI: you’re willing to make opinionated architectural bets in a landscape that is continually evolving
Working on customer-facing products with technical users: your users are developers, marketing analysts and data scientists who will notice when something isn’t right
Startup pace is real: things move fast, not everything is written down, and priorities shift - you know how to make progress anyway
Being part of a remote, async-first team spread across time zones where clear written communication is essential

What you'll work with:

Python & Ruby on Rails
REST APIs & MCP
AWS Cloud Services & Heroku
Bedrock AgentCore, Anthropic SDK, LangChain/LangGraph
PostgreSQL & Redis
Docker, Terraform, Kubernetes, GitHub Actions

Hiring Screen - discuss Recast, your background, and questions you have
Hiring Manager Interview - casual, mutual-fit conversation with our Head of Engineering
Technical Interview - includes a short take-home assignment; the interview covers your approach and a code walkthrough with Q&A
Team Interview - meet a couple of your future teammates and get a feel for how we work
Final Interview - meet with Recast's CEO to talk about Recast and your goals