As a Software Engineer II (Fullstack) at Juniper Square, you will design, build, and scale secure, high-performance public-facing APIs using Python, FastAPI, Celery, PostgreSQL, and AWS. You will play a key role in developing robust backend services while collaborating cross-functionally to ensure reliability, scalability, and performance in production environments.
What You'll Do
- Design, develop, and maintain public-facing RESTful APIs using Python and FastAPI
- Architect scalable backend systems with clean, modular, and testable code
- Implement asynchronous/background processing using Celery
- Design and optimise schemas and queries in PostgreSQL
- Deploy, monitor, and scale applications on AWS
- Ensure API security, authentication, authorisation, and rate limiting
- Implement observability (logging, metrics, tracing) for production systems
- Write unit, integration tests and technical documentation
- Participate in code reviews
- Participate in architecture discussions and collaborate cross-functionally
- Ensure high availability and reliability of APIs
What We're Looking For
- 4-6 years of experience in full-stack software development
- Strong proficiency in Python/Java
- Hands-on experience with FastAPI (or similar frameworks like Flask/Django REST)
- Proven experience building and scaling public-facing APIs
- Strong understanding of REST principles, API versioning, and backward compatibility
- Experience with asynchronous task processing using Celery
- Solid experience with PostgreSQL (query optimisation, indexing, transactions)
- Strong understanding of database design and performance tuning
- Experience with caching mechanisms such as Redis
- Experience deploying and operating services on AWS (EC2, RDS, S3, Lambda, ECS/EKS preferred)
- Experience with API Gateway, rate limiting, and web application firewalls (WAF)
- Strong understanding of authentication and authorisation (OAuth2, JWT)
- Experience with Docker and CI/CD pipelines
- Familiarity with Infrastructure as Code (Terraform / CloudFormation)
Nice to Have
- Experience with frontend technologies (React / Next.js / TypeScript)
Technical Stack
Python, Java, FastAPI, Flask, Django REST, Celery, PostgreSQL, Redis, AWS, EC2, RDS, S3, Lambda, ECS, EKS, API Gateway, WAF, OAuth2, JWT, Docker, CI/CD, Terraform, CloudFormation, React, Next.js, TypeScript
Benefits & Compensation
- Variety of ways to work, ranging from fully remote to working full-time in physical offices
- Digital-first operations enabling collaboration across 27 U.S. states, 2 Canadian Provinces, India, Luxembourg, and England
- Physical offices in San Francisco, New York City, Mumbai and Bangalore for employees who prefer to work in an office some or all of the time
Work Mode
Hybrid role with locations in San Francisco, New York City, Mumbai, Bangalore, India, Luxembourg, England, and across 27 U.S. states and 2 Canadian Provinces. Employees can choose between fully remote work or working in physical offices in select locations.
Juniper Square believes building a diverse workforce and an inclusive culture makes us a better company. They encourage applicants to apply even if they don’t meet all qualifications.
