Senior Software Engineer

Attinio; Washington (District of Columbia); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Attinio is seeking a Senior Full-Stack Software Engineer to bridge traditional development with AI integration. You will implement scalable solutions, build autonomous agents, and integrate LLMs into production workflows.

You’ll navigate front-end, back-end, cloud, and AI layers to deliver robust, secure products. You’ll design scalable web apps, develop with React/Next.js, build back-end APIs with Node.js and Python FastAPI, and manage AWS/Azure infrastructure.

Qualifications

• Strong server-side development experience with Python (FastAPI) and Node.js (Express or equivalent).
• Experience with AWS (EC2, Kubernetes, Lambda, S3, RDS) and/or Azure (App Service, Functions, Blob Storage, SQL Database).
• Expertise in building secure, scalable REST and GraphQL APIs and working with relational and NoSQL databases.

Responsibilities

• Design, develop and maintain scalable web applications with full-stack ownership.
• Build responsive web interfaces using modern frameworks (e.g., React, Next.js) and integrate back-end services.
• Provision, manage, and optimize cloud infrastructure on AWS/Azure and own service architecture.

Skills

Python (FastAPI)

Node.js (Express)

AWS

Azure

REST APIs

GraphQL

PostgreSQL

DynamoDB

CI/CD

GitHub/Bitbucket/Jira/Confluence

Tools

GitHub

Bitbucket

Jira

Confluence

Job description

We are looking for a Senior Full-Stack Software Engineer to join our growing engineering team. In this role, you will bridge the gap between traditional full-stack development and cutting-edge AI integration. You will implement scalable solutions, build autonomous agents, and integrate Large Language Models (LLMs) directly into our production workflows. You will move fluently between the front end, back end, cloud infrastructure, and AI layers, ensuring our product is robust and secure.

Key Responsibilities

• Design, develop and maintain scalable web applications with full-stack ownership.
• Develop responsive web applications using React, Next.js and other modern technologies.
• Build and manage back-end API’s on Node.js and Python FastAPI frameworks.
• Provision, manage, and optimize cloud infrastructure on AWS or Azure. You will own the architecture for the services you build.
• Maintain and improve CI/CD pipelines to ensure smooth, reliable deployments. Automate repetitive tasks and ensure “infrastructure as code” principles are upheld.
• Design and implement robust interfaces with LLM’s (OpenAI, Anthropic, Gemini, or open-source models) and other ML models.
• Work closely with product management and other engineers to define feature requirements and deliver high-quality products.

Technical Requirements (The Must-Haves)

• Strong server-side development skills in Python (FastAPI) and the Node.js (Express or equivalent) ecosystem.
• Hands‑on experience with AWS (EC2, Kubernetes, Lambda, S3, RDS) and/or Azure (App Service, ACA, Functions, Blob Storage, SQL Database).
• Expertise in building secure, scalable REST and GraphQL API’s.
• Proven experience with relational and NoSQL databases (PostgreSQL, DynamoDB etc.)
• Familiarity with software development lifecycle tools such as Github/Bitbucket, Jira and Confluence.
• Experience in building applications that consume LLM APIs. Familiarity with prompt engineering techniques (Chain‑of‑Thought, ReAct, RAG etc.) and context window management.

Preferred Qualifications

• Experience building and maintaining CI/CD pipelines (GitHub Actions, Bitbucket Pipelines etc.).
• Prior experience in healthcare domain and in handling PHI data.
• Familiarity with Infrastructure as Code tools such as Terraform, Pulumi, AWS CDK etc.
• Startup Mindset: Quick learner with a bias for action, ownership mentality and ability to favor pragmatism over perfection.

Location: Hybrid / Remote

• Hybrid: Candidates in the Washington, D.C. area will work from the DC office 3 days a week.
• Remote: We are open to fully remote applicants who demonstrate a high level of fit and potential for the role.