Code and Theory Logo

Senior Engineer Back-end

💰 $120k-$150k
🇺🇸 United States - Remote
💻 Software Development🟣 Senior

Job Description

The Machine team at Code and Theory operates as a bleeding edge enterprise AI startup within the larger agency. We are always striving to balance the demanding nature of working on cutting-edge technologies with the real-world demands of high performance, high security, and accessibility. Working in collaboration with our multi-disciplinary engineering, design, and quality assurance teams, you will build an AI-native software ecosystem that powers marketing workflows for both internal and external users.

You are a passionate advocate for software quality, its role in our society, and its relationship to technology. You deeply understand nuances of how to achieve experiences which are high performance while being cutting-edge, immersive and impressive for the end user.

WHAT YOU’LL DO

  • Lead the technical direction of projects, making high-level architectural decisions for full-stack applications that integrate AI services
  • Design and build robust backend services (Python) and intuitive, interactive frontend interfaces (React/Vue/Angular) that visualize complex data and AI interactions
  • Architect and maintain data processing pipelines, agentic workflows, and LLM integrations to solve real-world client problems
  • Foster a culture of excellence by performing rigorous code reviews, mentoring junior and senior developers, and driving the adoption of best practices
  • Partner closely with Product Management, Design, and QA to translate complex requirements into technical roadmaps and deliverable software
  • Evaluate system performance across the full stack, identifying bottlenecks in both the frontend rendering and backend AI inference layers to ensure scalability and reliability
  • Stay ahead of the curve on the latest AI trends (e.g., SLMs, Agentic AI, Multimodal models) and web technologies, advising stakeholders on feasibility and implementation

WHAT YOU’LL NEED

  • 4+ years of total software development experience
  • Expert proficiency in Python for backend development (FastAPI, Flask, or Django) and data processing
  • Strong experience with modern JavaScript/TypeScript frameworks (React, Vue, or Angular) and state management
  • Proven experience building applications on top of LLMs (OpenAI, Anthropic, OSS models), implementing RAG patterns, and using frameworks like LangChain or LlamaIndex
  • Deep experience designing and consuming RESTful APIs, GraphQL, and WebSockets
  • Mastery of Git, CI/CD pipelines, containerization (Docker/Kubernetes), and automated testing frameworks (Pytest, Jest, Cypress)
  • Experience with both relational databases (PostgreSQL) and Vector databases (Pinecone, Milvus, Weaviate, or pgvector)
  • Strong communication skills with the ability to explain complex technical concepts to non-technical stakeholders

NICE TO HAVE

  • Experience with Next.js and deploying to platforms like Vercel or AWS Amplify
  • Familiarity with Data Visualization libraries (D3.js, Three.js, or Highcharts) for rendering complex AI data
  • Experience fine-tuning LLMs or working with open-source models (Hugging Face)
  • Cloud certification (AWS, Azure, or GCP)
  • Expert understanding of web accessibility (WCAG) and animation performance

ABOUT US

Born in 2001, Code and Theory is a digital-first creative agency that sits at the center of creativity and technology. We pride ourselves on not only solving consumer and business problems, but also helping to establish new capabilities for our clients. With a global client roster of Fortune 100s and start-ups alike, we crave the hardest problems to solve. We have teams distributed across North America, South America, Europe, and Asia. The Code and Theory global network of agencies is growing and includes Kettle, Instrument, Left Field Labs, Create Group, Current, and TrueLogic.

Striving never to be pigeonholed, we work across every major category: from tech to CPG, financial services to travel & hospitality, government and education to media and publishing. We value the collaboration with our client partners, including but not limited to Adidas, Amazon, Con Edison, Diageo, EY, J.P. Morgan Chase, Lenovo, Marriott, Mars, Microsoft, Thomson Reuters, and TikTok.

The Code and Theory network is comprised of nearly 2,000 people with 50% engineers and 50% creative talent. We’re always on the lookout for smart, driven, and forward-thinking people to join our team.

The target range of base compensation for this role is $120,000 - $150,000. Actual compensation is influenced by a wide array of factors including but not limited to skill set, level of experience, and location.

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