The Role
The Lead Engineer II - Backend is responsible for designing and delivering high-quality backend Python services on AWS, focusing on API development, observability, and improvement of engineering practices while collaborating with teams across the organization.
Summary Generated by Built In
Best Egg is a market-leading, tech-enabled financial platform helping people build financial confidence through a variety of installment lending solutions and financial health tools. We aim to help customers make smart financial decisions and stay on track, so they can be money confident no matter what life throws at them.
We offer top-tier benefits and growth opportunities in a culture built on our core values:
Put People First – We foster an inclusive, flexible, and fun workplace.
Create Clarity – Open communication drives trust and results.
Get Things Done – We focus, prioritize, and deliver with excellence.
Deliver with Heart – We lead with kindness, humility, and strong teamwork.
Listen to Our Customers – Their needs drive our innovation.
Barclays has entered into an agreement to acquire Best Egg with closing expected to take place in Q2 2026. This acquisition will give us the resources and capital to continue on our mission and drive our strategy forward. With an aligned culture, lower cost of funds, and increased employee growth opportunities across a global brand, we are excited about the future of the Best Egg brand under the Barclays umbrella.
We are looking for collaborative, innovative team players who like to solve problems. There will also be immense opportunities for those willing to dive in. If you're inspired by growth and want to make a real difference, Best Egg is the place for you.
We’re proud to be an equal opportunity employer committed to building a diverse, inclusive team.
The Lead Software Engineer II – Backend plays an important role in building and enhancing backend engineering solutions across the organization. This role focuses on designing and delivering reliable, high-quality Python services on AWS while contributing to technical discussions, improving engineering practices, and supporting team execution. You will work closely with senior engineers, Product, and other backend and frontend teams to build performant, maintainable, and scalable APIs, serverless functions, and containerized services.
What You Will Do
- Design, develop, and deliver high-quality backend Python services iteratively and incrementally.
- Take ownership of key services and APIs—from hands-on coding through CI/CD, deployment to AWS, monitoring, and on-call support.
- Contribute to backend observability using tools like Datadog for logging, metrics, distributed tracing, and alerting.
- Participate in technical design discussions and contribute architectural insights, working with senior leaders to shape solutions.
- Ensure software follows modern engineering practices, including clean code, testing, automation, and modern backend architecture patterns.
- Support continuous improvement in code quality, reliability, performance, and developer experience.
- Translate business requirements into clear technical tasks and help validate assumptions and approaches.
Technical Leadership & Delivery
Qualifications & Experience
- 3–7 years of professional backend software engineering experience.
- Proficiency in Python at scale, including modern Python (3.13+), type hints, async/await, packaging, and a strong grasp of the standard library and the broader ecosystem.
- Expertise with at least one major Python web framework (FastAPI preferred; Django or Flask also strong) and the patterns that make Python services reliable in production.
- Strong hands-on experience with AWS, including building and operating production workloads on Lambda (serverless functions, event-driven architectures) and EKS (containerized services on Kubernetes).
- Working knowledge of supporting AWS services such as API Gateway, SQS/SNS, S3, IAM, CloudWatch, and Secrets Manager.
- Experience designing and building RESTful APIs
- Working knowledge of PostgreSQL
- Experience with Redis for caching, rate limiting
- Experience with containerization (Docker) and Kubernetes fundamentals (deployments, services, scaling, troubleshooting).
- Experience with CI/CD pipelines and modern release tooling; familiarity with GitHub Actions and Octopus Deploy is a plus.
- Experience with unit, integration, and contract testing (pytest or similar).
- Experience working within mature, legacy codebases and contributing to incremental modernization efforts.
Technical Expertise
What Success Looks Like
- Own core services or features.
- Deliver high-quality, production-ready code and contribute meaningfully to team goals.
- Build strong working relationships within Engineering, Product, and partner teams.
- Lead development of one or more services or features with increasing autonomy.
- Help improve service performance, reliability, and scalability.
- Support and elevate engineering practices through mentorship, code reviews, and process improvements.
In the first 90 days
In 6–12 months
Employee Benefits
Best Egg offers many additional benefits for our employees, including (but not limited to):
· Pre-tax and post-tax retirement savings plans with a competitive company matching
program
· Generous paid time-off plans including vacation, personal/sick time, paid short--
term and long-term disability leaves, paid parental leave, and paid company
holidays
· Multiple health care plans to choose from, including dental and vision options
· Flexible Spending Plans for Health Care, Dependent Care, and Health
Reimbursement Accounts
· Company-paid benefits such as life insurance, wellness platforms, employee
assistance programs, and Health Advocate programs
· Other great discounted benefits include identity theft protection, pet insurance,
fitness center reimbursements, and many more!
In compliance with the CCPA, Best Egg is fully committed to handling the personal information and data of employees and job applications responsibly with respect and due care. Review our CCPA Employee Policy here
Skills Required
- 3-7 years of professional backend software engineering experience.
- Proficiency in modern Python (3.13+), including type hints, async/await, and standard library.
- Expertise with at least one major Python web framework (FastAPI preferred; Django or Flask also strong).
- Strong hands-on experience with AWS, including Lambda and EKS.
- Working knowledge of supporting AWS services like API Gateway, SQS/SNS, S3, IAM, CloudWatch.
- Experience designing and building RESTful APIs.
- Working knowledge of PostgreSQL and Redis for caching.
- Experience with containerization (Docker) and Kubernetes fundamentals.
- Experience with CI/CD pipelines and GitHub Actions.
- Experience with unit, integration, and contract testing (pytest or similar).
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The Company
What We Do
Best Egg is a consumer financial technology platform that aims to help people feel more confident about their everyday finances through a suite of products and resources. Our digital financial platform offers simple, accessible, and personalized financial solutions including personal loans, credit cards, and a financial health resource center. Our culture and values are one of the core reasons why our customers keep returning to Best Egg. We are committed to championing a culture of inclusiveness and diversity of thought, and we focus on providing a safe, flexible, and collaborative work environment. Our associates are encouraged to engage in creative problem solving, and we promote opportunities for growth and enrichment across the organization. If you are inspired by inspiring others, Best Egg is the place for you.
