Full Stack Engineer II

Job description

As a Full Stack Software Engineer II, you will work end‑to‑end across front‑end and back‑end systems to ship features that directly impact our customers and partners.

Role Overview

You will:

• Design, build, and operate end‑to‑end product features across the stack (front‑end, back‑end, data & integration).

• Work in a cross‑functional team (product, design, data, other engineers) to solve real customer problems.

• Take ownership from design and implementation to production, monitoring and iteration.

• Contribute to engineering quality, reliability, and best practices within your team.

• Rapidly developing next-generation scalable, flexible, and high-performance services for the SS&F Department.

• Design, Develop and Maintain High Critical Services serving 

Key Responsibilities

• Design & build end‑to‑end features across web front‑ends and back‑end services.

• Implement and evolve APIs and microservices (REST/GraphQL/event‑driven) that are secure, scalable, and observable.

• Develop user interfaces using modern JavaScript/TypeScript, HTML/CSS and a component‑based framework (e.g. React or equivalent).

• Strong experience designing and implementing backend services in Java (or similar JVM languages), including APIs, business logic and integrations.

• Work with relational databases (e.g. MySQL) and caching solutions to model, store and retrieve data efficiently.

• Write high‑quality, testable code with unit, integration and end‑to‑end tests as appropriate.

• Use CI/CD pipelines to ship changes frequently and safely.

• Monitor services in production (logs, metrics, traces, alerts) and participate in on‑call / incident response where applicable.

• Collaborate closely with product, design and data to refine problems, define solutions and run experiments (A/B tests).

• Contribute to technical design discussions, code reviews, and knowledge sharing.

• Champion security, privacy, performance and reliability in your solutions.

• Mentor junior engineers informally and help raise the engineering bar in the team.

Required Qualifications

• 5–8 years of professional software engineering experience, including production systems.

• Have a strong drive to build high quality systems and improve the quality of existing systems

• Strong skills in back‑end language (Java, Spring Boot / Dropwizard) and one modern front‑end framework (e.g. React).

• Experience building and consuming HTTP APIs / microservices.

• Solid understanding of data structures, algorithms, and object‑oriented design.

• Hands‑on experience with relational databases (MySQL or equivalent) and writing efficient SQL.

• Experience with automated testing (unit, integration; familiarity with test pyramids and quality gates).

• Experience using CI/CD tools and version control (Git).

• Comfort working in agile, cross‑functional teams and collaborating with non‑engineering stakeholders.

• Strong communication skills, with the ability to explain trade‑offs and make pragmatic decisions.

• Mindset of ownership, learning and continuous improvement.

• Experience using modern AI tooling (e.g. Claude, GitHub Copilot, Windsurf or similar) to accelerate design, coding, testing and documentation, while maintaining high engineering standards.

• Experience operating high‑volume, low‑latency services in production, including performance tuning, capacity planning and incident handling.

• Hands‑on experience with AWS cloud services (e.g. EC2/EKS, S3, RDS, networking and monitoring) for deploying and operating backend workloads.

Nice‑to‑Have

• Experience with high‑traffic, distributed systems and performance tuning.

• Exposure to Kubernetes / container orchestration and cloud environments (e.g. AWS).

• Experience with message queues / streaming (e.g. Kafka) and event‑driven architectures.

• Familiarity with A/B testing and experimentation platforms.

• Front‑end experience in design systems / component libraries and accessibility best practices.

• Previous experience in e‑commerce, travel, payments, or fraud/risk domains.

If your application is successful, your personal data may be used for a pre-employment screening check by a third party as permitted by applicable law. Depending on the vacancy and applicable law, a pre-employment screening may include employment history, education and other information (such as media information) that may be necessary for determining your qualifications and suitability for the position.