Cambridge, MA · On-site
$133K - $176K/yr
Strong backend engineering skills -- you've built and scaled real systems (we use Python, but care ... Technical Stack Python (Django/DRF, FastAPI), React/TypeScript, PostgreSQL, Redis, Celery, AWS ...
Quick apply
Cambridge, MA · On-site
$133K - $176K/yr
Strong backend engineering skills -- you've built and scaled real systems (we use Python, but care ... Technical Stack Python (Django/DRF, FastAPI), React/TypeScript, PostgreSQL, Redis, Celery, AWS ...
Cambridge, MA · On-site
$133K - $176K/yr
Experience deploying ML services to production in cloud-based infrastructure (FastAPI/GRPC ... Exposure to scientific or engineering domains (materials, chemistry, physics) and related data ...
Cambridge, MA · On-site
$133K - $176K/yr
Experience deploying ML services to production in cloud-based infrastructure (FastAPI/GRPC ... Exposure to scientific or engineering domains (materials, chemistry, physics) and related data ...
What we're looking for: We're looking for a Senior Full Stack Software Developer to help us build ... using Django, FastAPI, or similar frameworks. * Robust understanding of web standards ...
What we're looking for: We're looking for a Senior Full Stack Software Developer to help us build ... using Django, FastAPI, or similar frameworks. * Robust understanding of web standards ...
What we're looking for: We're looking for a Senior Full Stack Software Developer to help us build ... using Django, FastAPI, or similar frameworks. * Robust understanding of web standards ...
What we're looking for: We're looking for a Senior Full Stack Software Developer to help us build ... using Django, FastAPI, or similar frameworks. * Robust understanding of web standards ...
Somerville, MA · On-site
$133K - $176K/yr
An impressive mission requires an equally impressive Senior Software Engineer. As a key technical ... Developing RESTful APIs (using frameworks such as FastAPI) secured by OAuth2/Auth * Integrating ...
Somerville, MA · On-site
$133K - $176K/yr
An impressive mission requires an equally impressive Senior Software Engineer. As a key technical ... Developing RESTful APIs (using frameworks such as FastAPI) secured by OAuth2/Auth * Integrating ...
Somerville, MA · On-site
$133K - $176K/yr
An impressive mission requires an equally impressive Senior Software Engineer. As a key technical ... Developing RESTful APIs (using frameworks such as FastAPI) secured by OAuth2/Auth * Integrating ...
Somerville, MA · On-site
$133K - $176K/yr
An impressive mission requires an equally impressive Senior Software Engineer. As a key technical ... Developing RESTful APIs (using frameworks such as FastAPI) secured by OAuth2/Auth * Integrating ...
Cambridge, MA · On-site
$144K - $210K/yr
Leverage AWS services, Kubernetes and modern DevOps practices to build and deploy production-grade ... Experience developing web apps across the full stack (React, TypeScript, TailWind, FastAPI, SQL ...
Cambridge, MA · On-site
$144K - $210K/yr
Leverage AWS services, Kubernetes and modern DevOps practices to build and deploy production-grade ... Experience developing web apps across the full stack (React, TypeScript, TailWind, FastAPI, SQL ...
Cambridge, MA · On-site
... developer experience. Qualifications : Required : • 5+ years of software engineering or test ... pytest, FastAPI TestClient, Pydantic). • Demonstrated experience designing evaluation or ...
Cambridge, MA · On-site
... developer experience. Qualifications : Required : • 5+ years of software engineering or test ... pytest, FastAPI TestClient, Pydantic). • Demonstrated experience designing evaluation or ...
Boston, MA · On-site
$100 - $130/hr
... with QA and DevOps to ensure robust, testable, and observable systems. * Contribute to ... Experience building backend services in Python (e.g., FastAPI) and TypeScript (e.g., Cloudflare ...
Boston, MA · On-site
$100 - $130/hr
... with QA and DevOps to ensure robust, testable, and observable systems. * Contribute to ... Experience building backend services in Python (e.g., FastAPI) and TypeScript (e.g., Cloudflare ...
Cambridge, MA · On-site
$180K - $256K/yr
... FastAPI). * Hands-on experience using AI coding assistants to drive productivity is required ... Cloud & DevOps Knowledge: Hands-on experience with AWS; strong understanding of Kubernetes and ...
Cambridge, MA · On-site
$180K - $256K/yr
... FastAPI). * Hands-on experience using AI coding assistants to drive productivity is required ... Cloud & DevOps Knowledge: Hands-on experience with AWS; strong understanding of Kubernetes and ...
Cambridge, MA · On-site
... developer experience. Required skills and qualifications * 5+ years of software engineering or test ... pytest, FastAPI TestClient, Pydantic). * Demonstrated experience designing evaluation or ...
Cambridge, MA · On-site
... developer experience. Required skills and qualifications * 5+ years of software engineering or test ... pytest, FastAPI TestClient, Pydantic). * Demonstrated experience designing evaluation or ...
Bridgewater, MA · On-site
$279 - $446.40/hr
Build and manage backend services and APIs using FastAPI . Collaborate with senior data scientists and engineers to prototype and optimiseAI solutions. Assist in integrating multimodal data pipelines ...
Bridgewater, MA · On-site
$279 - $446.40/hr
Build and manage backend services and APIs using FastAPI . Collaborate with senior data scientists and engineers to prototype and optimiseAI solutions. Assist in integrating multimodal data pipelines ...
Boston, MA · On-site
We are looking for a Senior Engineering Lead who is not only an exceptional coder but also adept at ... Experience with FastAPI, Python, and React front-end is essential. Key Responsibilities: * Lead and ...
Boston, MA · On-site
We are looking for a Senior Engineering Lead who is not only an exceptional coder but also adept at ... Experience with FastAPI, Python, and React front-end is essential. Key Responsibilities: * Lead and ...
Cambridge, MA · On-site
$144K - $270K/yr
Strong Python skills (FastAPI, Flask, Django), with solid experience in backend service development ... Cloud & DevOps: Proficiency with AWS, Docker/Kubernetes, CI/CD pipelines, and infrastructure-as ...
Cambridge, MA · On-site
$144K - $270K/yr
Strong Python skills (FastAPI, Flask, Django), with solid experience in backend service development ... Cloud & DevOps: Proficiency with AWS, Docker/Kubernetes, CI/CD pipelines, and infrastructure-as ...
Boston, MA · On-site
$140 - $180/hr
You will design and implement backend services using Python and FastAPI, and integrate with various ... Strong backend engineering experience with Python * Hands-on experience building APIs/services with ...
New
Boston, MA · On-site
$140 - $180/hr
You will design and implement backend services using Python and FastAPI, and integrate with various ... Strong backend engineering experience with Python * Hands-on experience building APIs/services with ...
New
Boston, MA · On-site
$170 - $190/hr
What we're looking for: We're looking for a Senior Full Stack Software Developer to help us build ... using Django, FastAPI, or similar frameworks. * Robust understanding of web standards ...
Boston, MA · On-site
$170 - $190/hr
What we're looking for: We're looking for a Senior Full Stack Software Developer to help us build ... using Django, FastAPI, or similar frameworks. * Robust understanding of web standards ...
Boston, MA · On-site
$113K - $155K/yr
Our team is looking for a Sr. AI Engineer on the Customer Agent team, Klaviyo's AI-native ... Proficient in Python and modern backend frameworks (FastAPI, Django preferred). * Experience ...
Boston, MA · On-site
$113K - $155K/yr
Our team is looking for a Sr. AI Engineer on the Customer Agent team, Klaviyo's AI-native ... Proficient in Python and modern backend frameworks (FastAPI, Django preferred). * Experience ...
Boston, MA · On-site
$113K - $155K/yr
Our team is looking for a Sr. AI Engineer on the Customer Agent team, Klaviyo's AI-native ... Proficient in Python and modern backend frameworks (FastAPI, Django preferred). * Experience ...
Quick apply
Boston, MA · On-site
$113K - $155K/yr
Our team is looking for a Sr. AI Engineer on the Customer Agent team, Klaviyo's AI-native ... Proficient in Python and modern backend frameworks (FastAPI, Django preferred). * Experience ...
Cambridge, MA · On-site
$133K - $176K/yr
As a Senior Backend Engineer, you will develop reliable, secure, and performant APIs that apply ... Python, Flask, FastAPI, Django REST Framework, PostgreSQL, Celery, RabbitMQ, Redis, Kafka, Jsonnet ...
Cambridge, MA · On-site
$133K - $176K/yr
As a Senior Backend Engineer, you will develop reliable, secure, and performant APIs that apply ... Python, Flask, FastAPI, Django REST Framework, PostgreSQL, Celery, RabbitMQ, Redis, Kafka, Jsonnet ...
Cambridge, MA · On-site
$133K - $176K/yr
As a Senior Backend Engineer, you will develop reliable, secure, and performant APIs that apply ... Python, Flask, FastAPI, Django REST Framework, PostgreSQL, Celery, RabbitMQ, Redis, Kafka, Jsonnet ...
Cambridge, MA · On-site
$133K - $176K/yr
As a Senior Backend Engineer, you will develop reliable, secure, and performant APIs that apply ... Python, Flask, FastAPI, Django REST Framework, PostgreSQL, Celery, RabbitMQ, Redis, Kafka, Jsonnet ...
The most popular types of Fastapi Developer jobs in Massachusetts are:
For Senior Fastapi Developer jobs in Massachusetts, the most frequently searched job titles are:
The top searched job categories for Senior Fastapi Developer jobs in Massachusetts are:
Cities in Massachusetts with the most Senior Fastapi Developer job openings:
$133K - $176K/yr
Full-time
Medical, Dental, Vision, Retirement, PTO
This job post has expired today. Applications are no longer accepted.
Company Description
Farsyt is an AI-native insurance services company reimagining how insurance is bought, sold and operated - using automation, data and AI from the ground up.
Small team, high ownership, fast pace, venture-backed. This role is for someone who wants to take real ownership, move quickly, and build systems that matter.
Role Description
You’ll work directly with the founders to build the core product from zero to one.
Architect and build core systems (backend, APIs, data models)
Design AI-powered workflows that replace manual operations
Integrate with fragmented, unreliable real-world systems (external tools, documents, communication layers)
Build production-grade automation systems powered by LLMs (reliability, evaluation, and failure handling matter)
Design and operate asynchronous, event-driven systems (queues, workers, long-running tasks)
Ship fast — from idea → production in days, not months
Make foundational technical decisions that define the company
There are no rigid specs. You’ll help define what gets built and how.
Qualifications
5+ years building production systems
Strong backend engineering skills — you’ve built and scaled real systems (we use Python, but care more about depth than specific frameworks)
Experience with cloud infrastructure (AWS, GCP, or similar)
Experience building systems from scratch
Comfortable operating in ambiguity and moving quickly
Experience with modern AI tooling (LLMs, RAG, agent frameworks) and an understanding of making them reliable in production (evaluation, structured outputs, failure handling)
Strong systems thinking — you think beyond individual features
Product intuition — you care about what gets built, not just how
Bonus:
Experience with voice, email, or messaging systems
Familiarity with fintech, insurance, or regulated environments
We care more about how you think and build than specific tools.
Technical Stack
Python (Django/DRF, FastAPI), React/TypeScript, PostgreSQL, Redis, Celery, AWS, Gemini/OpenAI/Anthropic APIs, Pydantic AI/LangChain, Docker
You don’t need experience with everything here, but you should be comfortable working in production systems and picking up new tools quickly.
The Team
You’d be joining the founding technical team, with direct input into what gets built and how. The people who join now will shape the company in ways that won’t be possible later.
Why this role?
You’ll be one of the first engineers — your decisions will shape the company
Direct access to founders, no layers
Real problems, not toy demos
A massive, outdated industry ready to be rebuilt
Compensation
Competitive salary & equity
Benefits
PTO
Health/Dental/Vision
401k
Relocation
Location
Cambridge, MA
In-office, 5 days/week — we believe early-stage teams build best in person.
Don’t meet every requirement?
If you’re excited about the role but don’t check every box, we still encourage you to apply. We’re open to candidates across a range of experience levels, including those who may be more senior than this role suggests.
We are an equal opportunity employer and value diversity at our company.
