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72 fastapi developer jobs at 43 companies in Massachusetts

1mo
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Senior Software Engineer
New York City or Arizona or California or Colorado or Connecticut or Florida or Georgia or Maine or Maryland or Massachusetts or Michigan or Minnesota or New Jersey or New York or North Carolina or Oregon or Rhode Island or South Carolina or Tennessee or Texas or Virginia or Utah or Wisconsin
$165k-$185k/yr RemoteFull Time
Electric
Electric: Provides automated IT management and security services for businesses.
8+ YOE8+ years backend experience with modern Python stack, leadership experience, proficiency in Postgres/SQLAlchemy, AWS, Terraform, FastAPI, React/TypeScript, observability, and familiarity with AI-assisted development.
Python, FastAPI, Pydantic, PostgreSQL, SQLAlchemy, Alembic, Temporal, Redis, AWS RDS, AWS S3, AWS SQS, AWS DynamoDB, AWS ECS, AWS IAM, Terraform, React, TypeScript, Claude Code
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1w
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Senior Backend Software Engineer
Arkansas or California or Colorado or District of Columbia or Florida or Illinois or Massachusetts or Maryland or Maine or Michigan or New Jersey or Ohio or Pennsylvania or South Carolina or Texas or Utah or Virginia or Washington
$165k-$195k/yr RemoteFull Time
SITE Technologies
SITE Technologies: Provides AI-powered property condition assessments and management software.
5+ YOE5+ years backend development experience with Python and FastAPI, strong backend architecture, relational modeling, AWS services, Docker, CI/CD, and cross-team communication.
Python, FastAPI, PostgreSQL, SQLAlchemy, Alembic, Flyway, AWS, ECS, Lambda, RDS, S3, IAM, Docker, Git, CI/CD, GitHub Actions, AWS CodePipeline, Claude Code, Cursor, Terraform, Terragrunt, Datadog, Sentry, LangGraph, Claude Code SDK, Amazon Bedrock
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4w
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Full Stack Developer
United States or Canada or Boston
RemoteFull Time
Quantiphi
Quantiphi: Provides applied AI research and data engineering services.
5+ YOE5+ years full stack development with React/TypeScript/Next.js frontend and Python (FastAPI) or Node.js backend; experience with REST APIs, microservices, PostgreSQL, Docker/Kubernetes, cloud platforms (GCP/Azure), CI/CD, distributed systems, and LLM/RAG/Agentic AI integration.
React, TypeScript, Next.js, Python, FastAPI, Node.js, PostgreSQL, Docker, Kubernetes, GCP, Azure, GitHub Actions, Kafka, Pub/Sub, LangChain, LangGraph, LlamaIndex, Redis, pgvector, Pinecone, Milvus, WebSockets, Server-Sent Events (SSE), OpenTelemetry, Playwright, GraphQL, gRPC, CI/CD, Model Context Protocol (MCP), FHIR R4, HL7 v2, SMART on FHIR, Epic, OAuth 2.0, OIDC
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1mo
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Staff Software Engineer (Backend)
Boston or Cambridge
HybridFull Time
Axiomatic AI
Axiomatic AI: Verified AI platform for scientific and engineering hardware design.
10+ YOE10+ years backend development with 2+ years in a staff/principal role; deep Python and FastAPI experience; distributed systems, SQLAlchemy/PostgreSQL, GCP, AI/LLM integration, technical leadership, RFCs and architecture design.
Python, FastAPI, SQLAlchemy, Pydantic AI, FastMCP, Alembic, PostgreSQL, Redis, REST, WebSockets, SSE, MCP, Anthropic Claude, Google Gemini, OpenAI, Vertex AI Model Garden, Mistral OCR, Google Cloud Platform, Cloud Run, Cloud SQL, GCS, VPCs, IAM, Auth0, Terraform, Docker, GitHub Actions, Logfire, Sentry, OpenTelemetry, pytest, pytest-asyncio, pytest-cov
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2mo
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Senior Full Stack Software Developer
Boston, Massachusetts, United States
$170k-$190k/yr HybridFull Time
Nexamp
Nexamp: Provides community solar and energy storage solutions.
7+ YOE7+ years of full stack software development; strong React/Typescript frontend and Python Django or FastAPI backend; solid SQL and cloud exposure; Git/CI/CD; Terraform; able to mentor others and drive initiatives.
React, Typescript, Python, Django, FastAPI, Azure, SQL, Terraform, Git, CI/CD
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1mo
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Senior Software Engineer, Lab Software
Cambridge, Massachusetts, United States
$144k-$210k/yr OnsiteFull Time
Lila Sciences
Lila Sciences: Develops an AI platform for autonomous scientific research and discovery.
5+ YOESenior backend-focused software engineer with 5-8+ years of experience building large-scale systems; full-stack development; Python, FastAPI, React, TS, SQL/NoSQL; cloud, AWS, Kubernetes; collaboration with scientists.
React, TypeScript, Tailwind, FastAPI, SQL, NoSQL, Python, Pydantic, AWS, Kubernetes, Terraform, CloudFormation, GitHub Actions, Airflow, Prefect, Temporal, Dagster
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4w
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AI Engineer – Agentic AI – Remote (all genders)
Bad Säckingen or Boston
RemoteFull Time
eschbach
eschbach: Enterprise software for shift operations in process manufacturing industries.
5+ YOE5+ years Python/backend experience; hands-on LLM agent development (tool calling, orchestration, memory/context, MCP); FastAPI, SQL, Kubernetes/Docker knowledge; fluent English and German (min B2); strong API, security, and system-design skills.
Python, pydantic-ai, LangGraph, LangChain, CrewAI, Model Context Protocol (MCP), FastAPI, SSE, WebSockets, SQL, Kubernetes, Docker, React, TypeScript, Tailwind
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3d
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Senior AI Engineer
Seattle or Cambridge or Princeton or Madison
$138k-$183k/yr OnsiteFull Time
Bristol Myers Squibb
Bristol Myers SquibbNYSE: BMY: Develops and manufactures innovative prescription biopharmaceutical medicines.
5+ YOEBachelor's degree,5+ years building and scaling cloud-native AI applications,proficiency in Python/FastAPI or TypeScript/Node,AWS experience,LLM/agent integration,CI/CD and infra-as-code knowledge.
AWS, Claude, LangSmith, Python, FastAPI, TypeScript, Node, LangGraph, Claude Agent SDK, LangChain, PydanticAI, Anthropic, OpenAI, Gemini, Grok, AWS Bedrock, Terraform, AWS CDK, CloudFormation, GitHub, Claude Code, Codex, Gemini CLI, Cursor, Windsurf, GitHub Copilot, LangSmith, promptfoo
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3w
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Senior Software Engineer
Somerville or Washington
$160k-$190k/yr HybridFull Time
VIA
VIA: Building secure, resilient digital infrastructure and AI solutions.
5+ YOEBachelor's in CS/Math/Engineering/Science, 5+ years full-stack/backend experience, cloud microservices, cryptography, Istio, FastAPI, Docker, Helm, SQL/NoSQL, CI/CD, automated testing, strong communication.
Istio, FastAPI, Docker, Helm, OAuth2, IETF RFCs, SQL, NoSQL
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3d
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Senior AI Engineer
Seattle or Madison or Princeton or Cambridge
$138k-$183k/yr OnsiteFull Time
Bristol Myers Squibb
Bristol Myers SquibbNew York Stock Exchange: BMY: Develops and distributes innovative medicines for serious diseases.
5+ YOE5+ years building cloud-native AI applications integrating LLMs, agents, retrieval, and workflows; strong Python/FastAPI or TypeScript/Node skills; AWS experience; knowledge of secure, observable, production AI patterns.
Python, FastAPI, TypeScript, Node, LangGraph, Claude Agent SDK, LangChain, PydanticAI, MCP, FastMCP, Anthropic, OpenAI, Gemini, Grok, AWS Bedrock, AWS, Terraform, AWS CDK, CloudFormation, GitHub, LangSmith, promptfoo, Claude Code, Codex, Gemini CLI, Cursor, Windsurf, GitHub Copilot
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1mo
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Automation Engineer - Scientific Data, AI/ML Pipelines & Integration Dev
Boston, Massachusetts, United States
HybridFull Time
Zifo
Zifo: Provides scientific informatics services for life sciences R&D organizations.
3+ YOEProficient in Python with FastAPI, SQL/NoSQL, AWS, CI/CD, data pipelines, and lab informatics.
Python, FastAPI, Flask, Django, AWS, S3, EC2, Lambda, Step Functions, RDS, Aurora, IAM, monitoring, logging, Git, GitHub Actions, GitLab CI, Jenkins, CI/CD, PyTest, unittest, mocking, pandas, NumPy, scikit-learn
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1w
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Senior Software Engineer
Boston or Encinitas
$142k-$192k/yr OnsiteFull Time
Paperless Parts
Paperless Parts: Cloud-based quoting software for custom part manufacturers.
5+ YOE5+ years experience building full-stack web applications; strong Python (Django/FastAPI), TypeScript/React, AWS, PostgreSQL, Docker, and CI/CD (Jenkins) experience; API design and mentoring skills; US citizenship or green card required.
Python, Django, FastAPI, TypeScript, React, PostgreSQL, AWS, Docker, Jenkins, Node/Express, Java/Spring
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1mo
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Senior Software Engineer - Product
Yonkers or Washington or Colchester or Arizona or California or Connecticut or Illinois or Maryland or Massachusetts or Michigan or New Hampshire or New Jersey or New York or Texas or Vermont or Virginia or District of Columbia
$115k-$160k/yr RemoteFull Time
Consumer Reports
Consumer Reports: Tests products and publishes ratings for consumer advocacy.
5+ YOE5+ years software engineering experience; proficiency with React, React Native, Python (FastAPI); experience building multi-platform apps, CI/CD, automated testing, observability; strong communication; bachelor’s degree preferred.
React, React Native, Python, FastAPI, AWS, Azure, Google Cloud Platform, CI/CD
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3w
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AIML Software Engineer, AI for Science
London or San Francisco or Zug or Heidelberg or Cambridge
$136k-$227k/yr HybridFull Time
GSK
GSKLondon Stock Exchange: GSK: Develops and manufactures innovative vaccines and specialty medicines.
Degree in a quantitative/engineering discipline or equivalent experience; advanced Python and FastAPI programming; experience with GCP/Azure and cloud-native architectures; familiarity with PyTorch/JAX/TensorFlow, CI/CD, containerization, SQL and production monitoring.
Python, FastAPI, GCP, Azure, PyTorch, JAX, TensorFlow, CI/CD, Kubernetes, Google Kubernetes Engine, Cloud Run, Cloud Storage, Artifact Registry, Cloud SQL, SQL, Terraform, shell scripting
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3mo
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Software Engineer II
Cambridge or New York
$130k-$175k/yr OnsiteFull Time
Kensho
Kensho: Developing AI and machine learning for financial data analysis.
2+ YOETwo+ years of SaaS backend development; API experience; strong communication; full lifecycle software development; knowledge of algorithms and data structures.
Python, FastAPI, Django, PostgreSQL, OpenSearch, Git, Jsonnet, Jenkins, AWS, EKS, Celery, RabbitMQ, Prometheus, Grafana, Sentry
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1mo
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Senior Full-Stack Software Engineer
Boston, Massachusetts, United States
$130k-$160k/yr OnsiteFull Time
Cyvl
Cyvl: Automates road and sidewalk inspections with LiDAR and AI.
5+ YOE5+ years of full-stack experience; strong React and JavaScript/TypeScript; backend with Python (FastAPI) and TypeScript; Postgres-based data layer; Git and CI/CD (Github Actions); cloud infra (AWS, Kubernetes, Cloudflare).
React, TypeScript, JavaScript, FastAPI, Postgres, Supabase, Git, Github Actions, AWS, Kubernetes, Cloudflare, Vite, TanStack Router, pnpm, Turborepo
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1w
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Senior Software Development Engineer
Cambridge, Massachusetts, United States
$125k-$160k/yr HybridFull Time
Mitsubishi Electric Iconics Digital Solutions
Mitsubishi Electric Iconics Digital Solutions: Provides industrial automation, SCADA, and IoT software solutions.
8+ YOE8+ years software development experience, proven technical leadership, production experience with generative AI, cloud-native architectures, full-stack development, and a bachelor's in CS or equivalent practical experience preferred.
Python, JavaScript, TypeScript, C#, Java, React, Vue, Angular, Node.js, Express, FastAPI, Django, Flask, ASP.NET, Spring Boot, PostgreSQL, SQL Server, DynamoDB, MongoDB, LLM APIs, AWS, Azure, GCP, Docker, Kubernetes, Terraform, CloudFormation
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2w
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Software Engineer
Watertown, Massachusetts, United States
$81k-$110k/yr HybridFull Time
Via Separations
Via Separations: Provides energy-efficient industrial filtration systems for decarbonized manufacturing.
Ownership of AWS infrastructure, back-end development in Python and TypeScript, CI/CD and IaC experience (Terraform, GitHub Actions), familiarity with containerization and SQL; U.S. work authorization required.
AWS, ECS Fargate, RDS, S3, IAM Identity Center, IAM, CloudTrail, CloudWatch, Security Hub, Elastic Beanstalk, API Gateway, Amplify, Python, TypeScript, React, FastAPI, SQLAlchemy, SQL, Terraform, GitHub Actions, Docker, Canary, OSIsoft PI, OPC
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3mo
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Software Engineer II
Cambridge or New York
$130k-$175k/yr HybridFull Time
S&P Global
S&P GlobalNYSE: SPGI: Provides financial data, analytics, and credit ratings worldwide.
2+ YOETwo+ years SaaS backend/API development; strong communication; lifecycle experience; algorithm and data structure proficiency.
FastAPI, Django, Python, PostgreSQL, OpenSearch, Git, Jsonnet, Jenkins, AWS EKS, Celery, RabbitMQ, Prometheus, Grafana, Sentry
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1w
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Software Engineer
Minneapolis or Boston
$73k-$130k/yr HybridFull Time
UnitedHealth Group
UnitedHealth GroupNYSE: UNH: Provides health insurance and technology-enabled health care services.
4+ YOEBachelor's degree and 4+ years software experience (2+ years Gen AI). Full-stack development with Python or Java, RESTful APIs, production operations/support, CI/CD with GitHub Actions, experience with ServiceNow, Splunk, Datadog, and LLM/Gen AI frameworks.
Python, Java, FastAPI, Spring Boot, GitHub Actions, ServiceNow, Splunk, Datadog, AWS SDK, OpenAI SDK, RESTful APIs
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