OneMain Financial Jobs

Lead Full Stack Engineer (Python, Fast API, AWS, React)

Category: Software Development/ Engineering

Main location: United States, Connecticut, Bloomfield

Position ID: J0326-0465

Employment Type: Full Time

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Position Description:

The best version of us starts with You!

We CGI is seeking a highly skilled and experienced Lead Full Stack Engineer (Python, Fast API, AWS, React) for MetagenAI, an enterprise AI-powered metadata management platform. This is a hands-on technical leadership role requiring someone who can drive architecture decisions while actively coding across the full stack. The candidate will take technical ownership of the project, design scalable solutions, and mentor the team.

This position can be performed from any Client site Dallas, TX, Austin, TX, Bloomfield, CT, Raleigh, NC or Lafayette, LA in a Hybrid working Model.

Your future duties and responsibilities:

Technical Leadership

. Drive architectural decisions and technical roadmap

. Establish coding standards and best practices

. Lead design reviews and technical discussions

. Mentor developers and conduct code reviews

Hands-On Development

. Implement complex features (frontend + backend)

. Optimize performance (APIs, queries, UI)

. Debug production issues

. Write clean, maintainable code

Collaboration

. Translate requirements into technical designs

. Work with product, data, and AI teams

. Communicate technical decisions to stakeholders

Required qualifications to be successful in this role:

At least 9+ years of overall software development experience required and must have skills:

Backend (Core)

. Python – FastAPI / Django / Flask

. RESTful APIs – Design and implementation

. SQLAlchemy ORM

. Async programming (async/await)

Frontend (Core)

. React – Modern React with hooks

. JavaScript / TypeScript (ES6+)

. State management (Redux / Context API)

. Material-UI or similar component libraries

Database

. PostgreSQL – Production experience, query optimization

. SQL – Complex queries, indexing, schema design

Cloud & DevOps

. AWS – Hands-on with multiple services (EC2, S3, Lambda, Glue, EKS)

. Docker – Containerization

. Kubernetes / EKS – Container orchestration

. CI/CD – Jenkins / GitLab / GitHub Actions

Architecture

. Microservices – Designed and implemented distributed systems

. System design – Scalability, performance, reliability

. API patterns – REST best practices

Desired qualifications/non-essential skills required:

AI / ML Integration

. LangChain or LLM orchestration frameworks

. OpenAI API integration experience

. Prompt engineering and embeddings

. Semantic search implementation

Specialized Databases

. Neo4j or graph databases (Cypher)

. Vector databases (Pinecone, Weaviate, pgvector)

Data Engineering

. AWS Glue or Apache Spark

. ETL / ELT pipelines

. Data profiling and quality assessment

TECH STACK OVERVIEW:

Backend: Python, FastAPI, SQLAlchemy, PostgreSQL

Frontend: React, Vite, Material-UI, TypeScript

Cloud: AWS (EKS, Glue, S3, Lambda), Docker, Kubernetes

AI: LangChain, OpenAI APIs, pgvector

Auth: Okta SSO, JWT

Education: Bachelor's degree in computer science or related field.

#LI-ARK1

CGI is required by law in some jurisdictions to include a reasonable estimate of the compensation range for this role. The determination of this range includes various factors not limited to skill set, level, experience, relevant training, and licensure and certifications. To support the ability to reward for merit-based performance, CGI typically does not hire individuals at or near the top of the range for their role. Compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range for this role in the U.S. is $80,600 - $211,600.00.

CGI's benefits are offered to eligible professionals on their first day of employment to include:

. Competitive compensation

. Comprehensive insurance options

. Matching contributions through the 401(k) plan and the share purchase plan

. Paid time off for vacation, holidays, and sick time

. Paid parental leave

. Learning opportunities and tuition assistance

. Wellness and Well-being programs

Skills:

• Python

• SQL

• Microservices

• Postgre SQL

• RESTful (Rest-APIs)

• Artificial Intelligence

What you can expect from us:

Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.

Qualified applicants will receive consideration for employment without regard to their race, ethnicity, ancestry, color, sex, religion, creed, age, national origin, citizenship status, disability, pregnancy, medical condition, military and veteran status, marital status, sexual orientation or perceived sexual orientation, gender, gender identity, and gender expression, familial status or responsibilities, reproductive health decisions, political affiliation, genetic information, height, weight, or any other legally protected status or characteristics to the extent required by applicable federal, state, and/or local laws where we do business.

CGI provides reasonable accommodations to qualified individuals with disabilities. If you need an accommodation to apply for a job in the U.S., please email the CGI U.S. Employment Compliance mailbox at USEmploymentCompliance@cgi.com . You will need to reference the Position ID of the position in which you are interested. Your message will be routed to the appropriate recruiter who will assist you. Please note, this email address is only to be used for those individuals who need an accommodation to apply for a job. Emails for any other reason or those that do not include a Position ID will not be returned.

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All CGI offers of employment in the U.S. are contingent upon the ability to successfully complete a background investigation. Background investigation components can vary dependent upon specific assignment and/or level of US government security clearance held. Dependent upon role and/or federal government security clearance requirements, and in accordance with applicable laws, some background investigations may include a credit check. CGI will consider for employment qualified applicants with arrests and conviction records in accordance with all local regulations and ordinances.

CGI will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with CGI’s legal duty to furnish information.