4w
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Full Stack Developer
United States or Canada or Boston
RemoteFull Time
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
1mo
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Staff Software Engineer (Backend)
Boston or Cambridge
HybridFull Time
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
2w
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Senior Machine Learning Engineer (10187)
Seattle or Salem
$110k-$160k/yr HybridFull Time
4+ YOEBachelor's degree in math/computer science, 4+ years software development experience, strong Python, FastAPI, Docker, Kubernetes, cloud architecture experience, ML familiarity (PyTorch, Sagemaker) and leadership/mentorship experience.
Python, FastAPI, Docker, Kubernetes, CI/CD, AWS, Azure, Google Cloud, PyTorch, Sagemaker, Triton, TensorRT, NoSQL
2mo
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Senior Full Stack Software Developer
Boston, Massachusetts, United States
$170k-$190k/yr HybridFull Time
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
1mo
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Senior Software Engineer, Lab Software
Cambridge, Massachusetts, United States
$144k-$210k/yr OnsiteFull Time
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
4w
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AI Engineer – Agentic AI – Remote (all genders)
Bad Säckingen or Boston
RemoteFull Time
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
3d
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Senior AI Engineer
Seattle or Cambridge or Princeton or Madison
$138k-$183k/yr OnsiteFull Time
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
3w
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Senior Software Engineer
Somerville or Washington
$160k-$190k/yr HybridFull Time
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
3d
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Senior AI Engineer
Seattle or Madison or Princeton or Cambridge
$138k-$183k/yr OnsiteFull Time
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
1mo
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Automation Engineer - Scientific Data, AI/ML Pipelines & Integration Dev
Boston, Massachusetts, United States
HybridFull Time
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
1w
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Senior Software Engineer
Boston or Encinitas
$142k-$192k/yr OnsiteFull Time
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
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
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
3mo
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Software Engineer II
Cambridge or New York
$130k-$175k/yr OnsiteFull Time
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
1mo
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Senior Full-Stack Software Engineer
Boston, Massachusetts, United States
$130k-$160k/yr OnsiteFull Time
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
1w
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Senior Software Development Engineer
Cambridge, Massachusetts, United States
$125k-$160k/yr HybridFull Time
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
2w
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Software Engineer
Watertown, Massachusetts, United States
$81k-$110k/yr HybridFull Time
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
3mo
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Software Engineer II
Cambridge or New York
$130k-$175k/yr HybridFull Time
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
1w
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Software Engineer
Minneapolis or Boston
$73k-$130k/yr HybridFull Time
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
3mo
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Senior Software Engineer
Cambridge or New York
$150k-$225k/yr RemoteFull Time
5+ YOEFive+ years experience building customer-facing APIs; RESTful API expertise; strong communication; full software development lifecycle.
Python, Flask, FastAPI, Django REST Framework, PostgreSQL, Celery, RabbitMQ, Redis, Kafka, Jsonnet, Claude Code, Codex, Cline, AWS, Amazon EKS, Sentry, Prometheus, Git, Jenkins, Github Actions
2mo
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Python - Senior Developers - AI Training - Boston, USA
Boston or United States
$50/hr RemoteContract
5+ YOEBSc or higher in CS/software engineering, senior Python development experience, strong knowledge of GIL, asyncio, decorators, generators, and modern Python 3.x features; experience with Django/FastAPI/Flask and pytest/unittest.
Python 3.x, Django, FastAPI, Flask, pytest, unittest, coverage.py, tox, GraphQL, asyncio, RESTful APIs
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