Senior/Staff Backend Engineer
Designs, builds, and maintains core backend APIs for payments and loyalty platforms using Kotlin and RESTful services. Collaborates cross-functionally, mentors engineers, and scales systems in a fast-paced environment. Requires 5+ years experience.
About the job
Responsibilities
- Design, build, and maintain core backend APIs
- Collaborate with product, design, and engineering peers to deliver features aligned with business goals
- Contribute to system architecture and implement scalable, robust solutions
- Uphold and promote backend best practices, with a focus on code quality, testing, and performance
- Mentor junior and mid-level engineers and foster a collaborative, growth-oriented team culture
- Participate in product and design discussions, offering backend perspectives on implementation and feasibility
Requirements
- 5+ years of experience building and deploying backend APIs
- Strong proficiency in Kotlin or another statically typed JVM language
- Deep experience designing and maintaining RESTful APIs using domain-driven design principles
- Solid understanding of SQL databases, including schema design and performance tuning
- Strong attention to detail and commitment to delivering high-quality user experiences
- Ability to work autonomously and make sound decisions in a fast-moving environment
- Experience mentoring engineers and contributing positively to team culture
- Comfortable working cross-functionally with product, design, and other stakeholders
Nice to Haves
- Experience with the Spring framework and database abstraction layers such as Hibernate
- Familiarity with the U.S. payments ecosystem, including debit, credit, and ACH processing
- Exposure to DevOps practices, including AWS infrastructure and Terraform
- Interest or experience in blockchain, especially with cryptography fundamentals
- Experience productionizing generative AI features (e.g. retrieval-augmented generation, prompt engineering, or model integration)
Compensation
Target annual salary: $180,000-$220,000 USD (depending on work location and experience). Full time offers may include stock options, benefits (medical, dental, vision, flexible time off, 401(k)), and perks.
Skills
Kotlin, REST APIs, SQL, Spring, Hibernate, AWS, Terraform, Domain-Driven Design, Payments, Blockchain
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