Senior Fastapi Developer Jobs in Brooklyn, NY (NOW HIRING)

Summary of Business Unit/Function:
The One Policy Engine is a unified policy platform for multi-cloud environments that keeps Infrastructure-as-Code (IaC) compliant from code to cloud. We apply policy enforcement early and consistently across the SDLC so security and compliance are built in from the start.
By integrating with platforms like Wiz CNAPP, we extend coverage beyond IaC to continuously assess cloud security posture. This integration helps identify misconfigurations, understand real runtime risk, and prioritize remediation-preventing issues before they reach production.
About the Role:
We are seeking a Senior Senior Platform Engineer with deep expertise in Python, cloud-native application development, and hands-on experience with Azure, AWS and DevSecOps. The ideal candidate is a versatile engineer who can design scalable APIs, build secure backend systems, develop modern frontend interfaces, and deploy resilient cloud-enabled solutions across hybrid environments.
You will play a key role in integrating AI-powered tools into development workflows, driving automation, and improving developer productivity. A strong background with the Wiz Platform is critical, as this role involves deeply integrating Wiz's CNAPP capabilities into data-intensive systems to deliver scalable, reliable, and high-performance cloud security solutions. You will work closely with engineering and security teams to leverage Wiz insights, automate policy enforcement, and ensure secure-by-design cloud deployments.
This role also requires strong DevSecOps skills, including experience with CI/CD pipelines, infrastructure as code (IaC) using Terraform, and containerization technologies like Docker and Kubernetes. You'll help streamline deployment processes, improve system observability, and ensure high availability across cloud platforms.
Responsibilities:
Design and develop secure, scalable RESTful and GraphQL APIs using Python frameworks like FastAPI, Flask, or Django
Implement design patterns for reusable, maintainable backend systems
Design and optimize algorithms for processing, analytics, and data transformation
Build responsive frontend applications using React.js, TypeScript, or modern frameworks
Implement and maintain CI/CD pipelines and infrastructure as code using Azure or AWS
Integrate AI/ML models into production systems, including model serving, monitoring, and retraining workflows
Ensure application security with OAuth2, JWT, rate-limiting, and threat modeling
Integrate AI-assisted development and code generation tools such as GitHub Copilot, OpenAI APIs, or custom LLMs
Collaborate closely with product managers, designers, and DevOps to build production-grade software
Write unit, integration, and performance tests to ensure code quality
Mentor junior developers and conduct code/design reviews
Experience Requirements:
7+ years of professional software development experience, with a strong focus on backend systems and cloud-native applications.
4+ years of hands-on experience in Python, including building scalable APIs, with deep understanding of language features and design patterns, automation scripts, and data processing pipelines.
2+ years of experience in Go (Golang), with exposure to microservices, concurrency patterns, and performance optimization.
Proven experience in backend frameworks such as FastAPI, Flask, or Django
Strong grasp of REST, WebSockets, API versioning, and documentation best practices
Experience with frontend technologies like React, Next.js, or Vue.js
Familiarity with SQL and NoSQL databases such as PostgreSQL, MySQL, MongoDB, or Redis
Experience working in cloud-native environments, preferably Microsoft Azure, including services like Azure Kubernetes Service (AKS), Azure Functions, and Azure Policy.
Understanding of application security concepts: CORS, CSRF, authentication flows, rate-limiting
Experience with using or integrating AI coding tools and APIs
Good understanding of software architecture, microservices, and event-driven systems
Qualifications Requirements:
Bachelor's or Master's degree in computer science, Software Engineering, or a related field.
Strong understanding of software design principles, data structures, and algorithms.
Proficiency in version control systems (e.g., Git) and agile development methodologies.
Excellent problem-solving skills and ability to work independently or in a team.
Self-driven, proactive, and able to work independently
Strong communication and collaboration in cross-functional teams
Preferred Skills:
Experience with GraphQL and API gateway technologies
Familiarity with observability tools (Datadog, Prometheus, ELK stack)
Knowledge of async programming, task queues (Celery, RQ), and distributed systems
Experience building internal developer tools, portals, or CI/CD platforms
Exposure to DevSecOps practices and secure software supply chain tooling
Passion for clean, readable, and well-documented code
Certifications such as Azure Developer Associate or Go Programming Language Certification.
Career Stage:
Senior Associate
Compensation/Benefits Information:
LSEG is committed to offering competitive Compensation and Benefits. The anticipated base salary for this position is $113,900 - $189,900.
Please be aware base salary ranges may vary by geographic location, city and state. In addition to our offered base salary, this role is eligible for our Annual Incentive Plan (AIP/"bonus plan"). Target AIP rates will be commensurate with role level and posted career stage. Individual salary will be reflective of job related knowledge, skills and equivalent experience. LSEG roles (excluding internships and part-time roles of less than 20 hours per week) are typically eligible for inclusion in our LSEG Benefits program, which includes offerings of: Annual Wellness Allowance, Paid time-off, Medical, Dental, Vision, Flex Spending & Health Savings Options, Prescription Drug plan, 401(K) Savings Plan and Company match. LSEG's Benefits plan also includes basic life insurance, disability benefits, emergency backup dependent care, adoption assistance commuter assistance etc.
London Stock Exchange Group (LSEG) Information:
Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.
LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.
Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.
Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.
We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.
You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject .
If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.