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203 fastapi developer jobs at 123 companies in Fairfield, CT

2mo
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Product Engineer
New York or London
$90k-$200k/yr HybridAll Commitments Available
Auquan
Auquan: Autonomous AI agents for financial institutions to automate workflows.
4+ YOE4+ years software development; ownership of end-to-end subsystem; strong Python; experience with AI/LLM workflows; translate customer needs; stack: Python, React/NextJS, FastAPI, MongoDB, Redis.
Python, React, NextJS, FastAPI, MongoDB, Redis
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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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1mo
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Sr. Software Engineer II - StreamingTV
New York City, New York, United States
$111k-$222k/yr HybridFull Time
DoubleVerify
DoubleVerifyNew York Stock Exchange: DV: Provides software for measuring and authenticating digital media quality.
5+ YOE5-7+ years in software development; Python; data pipelines; Airflow; Kafka; Snowflake/BigQuery; dbt; FastAPI; CI/CD; AI tooling.
Python, Airflow, Airbyte, Kafka, dbt, FastAPI, Snowflake, BigQuery, GCP, Claude Code, Cursor, Docker, Kubernetes
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2w
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Senior Software Engineer, Platform
New York City or United States
$160k-$180k/yr RemoteFull Time
Hungryroot
Hungryroot: Provides AI-powered personalized grocery delivery and meal planning.
5+ YOE5+ years software development experience, 3+ years Python, backend services with Django/Flask/FastAPI, strong SQL, AWS production experience, observability tooling, on-call participation, and technical leadership on cross-team projects.
Python, Django, Flask, FastAPI, SQL, AWS, Datadog, CloudWatch, Claude Code, Terraform, Docker, Celery, Dyrygent, React
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3mo
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Senior Software Engineer - Client Portal
Brooklyn, New York, United States
$145k-$175k/yr OnsiteFull Time
Morgan & Morgan
Morgan & Morgan: Provides legal representation for personal injury and consumer litigation.
Experience building backend services with FastAPI/Python and frontend/mobile with React/React Native + Expo; AWS experience; champion test-driven development, code quality, incident response, and cross-functional collaboration.
FastAPI, Python, React Native, Expo, React, AWS
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1mo
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(Senior) Fullstack Developer (m/f/d)
New York, New York, United States
OnsiteFull Time
eigenblue
eigenblue: An R&D building AI-driven multidisciplinary systems that design and deliver custom physical solutions.
3+ YOEUniversity degree in CS or related, 3+ years agile software development, strong JavaScript/TypeScript (React, Vue, Node.js), Python (Django/FastAPI), Docker, Kubernetes, CI/CD, cloud experience (AWS/Azure/GCP), and production deployment expertise.
React, Vue, JavaScript, TypeScript, Node.js, Python, Django, FastAPI, Docker, Kubernetes, CI/CD, AWS, Azure, GCP, GraphQL, Neo4j
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2mo
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Sr Software Engineer
New York, New York, United States
HybridFull Time
Scale Microgrids
Scale Microgrids: Provides turnkey microgrid and distributed energy infrastructure solutions.
5+ YOE5+ years Python/JavaScript/TypeScript; energy modeling; optimization; FastAPI; React; PostgreSQL; IoT protocols; SCADA experience.
Python, JavaScript, TypeScript, FastAPI, React, PostgreSQL, Pyomo, HiGHS, Gurobi, GLPK, MQTT, Sparkplug B, AWS IoT Core, Ignition, SCADA
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1mo
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Software Engineer - Front Office Credit Technology
New York City, New York, United States
$175k-$250k/yr OnsiteFull Time
Millennium Management
Millennium Management: Global alternative investment firm managing diverse investment strategies.
5+ YOE5–7 years software development experience; strong Python (pandas, NumPy); experience with FastAPI and APIs; end-to-end delivery experience; bachelor's in a quantitative field; strong communication and problem-solving skills.
Python, C++, Java, pandas, NumPy, FastAPI, AWS, S3, SQS, Batch, Lambda, Docker, Kubernetes
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1mo
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Technology Lead Python Data Engineer
Rutherford, New Jersey, United States
$142k-$213k/yr HybridFull Time
Citi
CitiNYSE: C: Providing global banking, investment, and wealth management services.
10+ YOE10+ years application development experience; advanced Python and SQL; experience with FastAPI, Pydantic, Django, Docker, Kubernetes, Linux; microservices, API design, testing, and AI/LLM familiarity; bachelor’s required, master’s preferred.
Python, SQL, FastAPI, Pydantic, Django, Docker, Kubernetes, Linux, OpenAI, Anthropic, Google, Meta, Spark, PySpark, Hadoop, Hive, Neo4j
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1mo
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Junior Software Developer
Sofia or Dresden or Singapore or New York City or Vermont
HybridFull Time
GlobalFoundries
GlobalFoundriesNASDAQ: GFS: Manufacturer of semiconductors and provider of wafer fabrication services.
0+ YOEB.S. or M.S. in CS or related field, 0–2 years relevant experience, proficiency in Python (Pydantic, pytest, pandas, FastAPI, lark, sly, nicegui), Tcl/Bash shell scripting, Java, git and DevOps concepts; familiarity with Azure DevOps preferred.
Python, Pydantic, pytest, pandas, FastAPI, lark, sly, nicegui, Tcl, Bash, git, Java, Azure DevOps
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2mo
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Product Engineer
San Francisco or New York
OnsiteFull Time
Ciridae
Ciridae: Develops AI-native operating systems for real-economy businesses.
Build AI-native applications end-to-end using React/TypeScript, Python, FastAPI, and Postgres; ship features with observability and real customer impact. Strong experience with at least one LLM API and RAG mindset.
React, TypeScript, Python, FastAPI, PostgreSQL, LLM API
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3mo
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Senior Full Stack Engineer, Agentic Security
San Francisco or Amsterdam or New York or London or Bengaluru
RemoteFull Time
Dynamo AI
Dynamo AI: A building trustworthy AI infrastructure and security products for enterprise deployments.
Strong full-stack experience building backend services and React/TypeScript UIs; proficiency with Python/FastAPI, PostgreSQL, Redis, Docker/Kubernetes, CI/CD, and AWS; familiarity with agentic/AI-assisted development workflows.
Python, FastAPI, NestJS, React, TypeScript, PostgreSQL, Redis, Dockerfiles, Helm charts, GitHub Actions, K8s, AWS, PyInstaller, Cursor, Claude Code, agent skills, CLI, Next.js, uv, pyproject.toml, ArgoCD, Redis Streams, Git
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2d
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Senior Python Engineer
New York City, New York, United States
RemoteFull Time
DeweyLearn
DeweyLearn: AI-powered platform providing insights for educational teaching and learning.
5+ YOE5+ years professional Python experience, FastAPI and PostgreSQL production experience, Docker, EM/CI-CD fundamentals, experience with ML/AI and retrieval workflows preferred; fluent English.
Python, FastAPI, PostgreSQL, Docker, CI/CD
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1mo
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Senior Software Engineer
New York or Israel
HybridFull Time
Qodo
Qodo: AI-powered platform for automated code review and integrity.
7+ YOE7+ years building high-performance backend systems; strong Python and FastAPI expertise; experience with PostgreSQL, Redis, GCP, and OpenAI/LLM integrations; architectural leadership and collaboration skills.
Python, FastAPI, PostgreSQL, Redis, OpenAI, GCP, Claude Code, Cursor, Copilot
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4h
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Fullstack Software Engineer
San Francisco or New York City or United States
RemoteFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
2+ YOEProficiency with TypeScript, React, Python (FastAPI), PostgreSQL, and AWS; 2+ years full-stack experience; fintech or regulated-industry experience; strong CS fundamentals.
TypeScript, React, Python, FastAPI, PostgreSQL, AWS
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2mo
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Senior AI Engineer
New York, New York, United States
$120k-$165k/yr OnsiteFull Time
Morgan Stanley
Morgan StanleyNYSE: MS: Global financial services firm providing investment and wealth management.
5+ YOE5+ years experience building production-grade Python AI/LLM applications; hands-on with FastAPI/Flask, SQL, concurrency, testing, production reliability, and mentoring; experience with cloud-native and container technologies preferred.
Python, FastAPI, Flask, SQL, Large Language Models (LLM), OpenTelemetry, Grafana, Prometheus, Docker, Kubernetes, Kafka, Redis, Jenkins, GitHub Actions
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3w
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Principal Engineer, Software
Pune or New York City or United States or United Kingdom or Finland or India or Singapore or Canada or Ireland
RemoteFull Time
AlphaSense
AlphaSense: AI-powered search platform for business and financial market intelligence.
14+ YOE14+ years software engineering experience; 8+ years building production backend services (FastAPI, Django, Spring Boot); mastery of large-scale distributed systems, observability, and strong leadership/communication skills.
FastAPI, Django, Spring Boot, Docker, Kubernetes, Large Language Models (LLMs), DevOps, MLOps, CI/CD, Infrastructure as Code (IaC)
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3w
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Software Engineer - Pre-trade analytics, risk, portfolio optimization
New York City, New York, United States
$170k-$220k/yr HybridFull Time
Clear Street
Clear Street: Cloud-native capital markets platform for institutional trading and clearing.
5+ YOE5+ years building scalable services in Java (Spring) and/or Python (FastAPI, Pydantic, async); experience with PostgreSQL and Pandas/Polars; familiarity with AI-assisted workflows (Claude Code) and spec-driven development; strong system design and mentorship skills.
Java, Spring Framework, Python, FastAPI, Pydantic, PostgreSQL, Pandas, Polars, Claude Code, gRPC, Redis, Docker, Gradle, uv, AWS, Kubernetes
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1mo
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Senior Python Application Developer Senior Vice President
New York, New York, United States
$177k-$265k/yr HybridFull Time
Citi
CitiNYSE: C: Global diversified financial services holding.
10+ YOE10+ years application development experience with expert Python 3.x, web frameworks (FastAPI/Django/Flask), distributed systems, relational and NoSQL databases, CI/CD, cloud (AWS/Azure/GCP), Docker/Kubernetes, and strong domain knowledge in market/quantitative risk.
Python 3.x, FastAPI, Django, Flask, PostgreSQL, Oracle, SQL Server, MongoDB, Cassandra, Redis, Jenkins, GitLab CI, GitHub Actions, Bitbucket Pipelines, Unix, AWS, Azure, GCP, Docker, Kubernetes, Pytest, unittest, Git, TensorFlow, PyTorch, scikit-learn, Copilot, Devin, Claude, Gemini, GPT, LangChain, LlamaIndex, Hugging Face, LangGraph, React, Angular, Vue.js, Apache Spark, Hadoop, Kafka
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4w
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Senior Software Engineer - Backend
New York or Manhattan or London
$165k-$180k/yr HybridFull Time
Fitch Group
Fitch Group: Provides global credit ratings and financial market research services.
3+ YOE3+ years software development experience, strong Java (Spring Boot) and/or Python (FastAPI) skills, SQL experience, cloud (AWS) familiarity, REST API and distributed systems experience, testing and CI/CD knowledge, bachelors preferred.
Java, Spring Boot, Python, FastAPI, SQL, PL/SQL, AWS, Kubernetes, EKS, Docker, Kafka, Redis, MongoDB, GitHub Actions, GitHub Copilot, Amazon Q, LangChain, LlamaIndex, MCP, A2A
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