Senior Software Engineer - Payments

FastSpring

10h•$145,000 - $156,000

About The Position

FastSpring is looking for a Senior Software Engineer to join our Payments team, designing and developing the systems that power our industry-leading full-service ecommerce platform — payment processing, subscription billing, settlement, refunds, and reporting.

Requirements

10+ years of software development experience delivering commercial SaaS solutions using Java
Passionate problem solver with a proven track record of delivering high-quality software solutions
4+ years of experience with SQL (PostgreSQL) and NoSQL storage
3+ years of experience implementing RESTful service-oriented architectures with public APIs
HTML / CSS / JavaScript / Angular experience; Vue a plus
Unit testing, mocking, and automation experience
3+ years experience with Amazon Web Services, including EC2, S3, RDS, DynamoDB; experience with Lambda is a plus
Experience with Linux; experience with containers & Docker is a plus
Comfortable using AI-assisted development tooling — our engineers use Claude Code day-to-day to accelerate design, implementation, and review
Bachelor's or Master's degree in Computer Science or equivalent experience

Nice To Haves

Experience in the Payments industry and/or integrating with a third-party payment API is a plus

Responsibilities

Working within our agile software development teams, lead design and development of product features for highly available payment processing, subscription billing, and reporting platforms
Lead integrations with external platforms such as payment processors, card networks, and alternative payment methods (APMs)
Ensure a robust software delivery process through clear procedures as well as automated build, test, and deployment capabilities
Debug and troubleshoot complex issues, optimize system performance, and ensure reliability across money-movement flows
Reduce time to market by decomposing large feature requirements into small development tasks suitable for incremental releases
Participate in design and code review with other team members
Mentor junior members of the development team
Manage software issues through tickets according to product development priorities
Lead the adoption of best practices for coding standards, testing, and deployment
Work with other FastSpring team members — Product, Risk, Finance, and Compliance — to understand and incorporate business and regulatory requirements (PCI-DSS, PSD2/SCA, 3DS2) into product solutions
Flexible hours to work with local and remote team members on feedback and requirements
Respond to production issues and apply continuous improvement techniques to fully resolve them