Senior Software Engineer - Payments

FastSpring; United States; On-site; USD 175,000 - 196,800; Full time

Benefits offered by this job

Corporate bonus plan

Variety of employee benefits

Job summary

FastSpring is seeking a Senior Software Engineer for its Payments team. The role involves designing and developing systems for payment processing and reporting, ensuring high-quality software delivery.

Ideal candidates will have over 10 years of experience in SaaS development, a background in payments, and strong skills in Java and SQL. FastSpring offers competitive salaries and a variety of employee benefits.

Qualifications

• 10+ years of software development experience delivering commercial SaaS solutions.
• Experience in the Payments industry and/or integrating with third-party payment APIs.
• 4+ years of experience with SQL (PostgreSQL) and NoSQL storage.
• 3+ years of experience implementing RESTful service-oriented architectures.

Responsibilities

• Lead design and development of product features for payment processing and reporting.
• Integrate with external platforms like payment processors and card networks.
• Debug and optimize system performance across money movement flows.

Skills

Java

SQL (PostgreSQL)

RESTful APIs

HTML / CSS / JavaScript / Angular

Amazon Web Services

Education

Bachelor's or Master's degree in Computer Science

Tools

Linux

Docker

Job description

About FastSpring

FastSpring is how AI, SaaS, gaming, software, and digital product companies sell online in more places around the world. We handle all payment needs from checkout to taxes so you can go farther faster. Founded in 2005, we are a privately owned company headquartered in Santa Barbara with offices in Amsterdam, Austin, Belfast, Dublin, Halifax, and Singapore.

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 e‑commerce platform—payment processing, subscription billing, settlement, refunds, and reporting.

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

Qualifications

• 10+ years of software development experience delivering commercial SaaS solutions using Java
• Experience in the Payments industry and/or integrating with a third‑party payment API is a plus
• 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

Consistent with FastSpring’s values and applicable law, we provide the following information to promote pay transparency and equity. The base pay range below represents a good faith estimate of the low and high end base pay range for the listed position. This role may be eligible for the corporate bonus plan (or, if a sales role, a commission plan as defined in the sales incentive plan document). In addition, FastSpring provides a variety of benefits to employees.

Estimated Base Pay Range

$175,000 - $196,800 USD

About The Company

FastSpring is an EQUAL EMPLOYMENT OPPORTUNITY/AFFIRMATIVE ACTION employer. Candidates are considered for employment with FastSpring without regard to their race, color, religion, national origin, age, sex, gender, pregnancy, disability, sexual orientation, gender identity, genetic information, military status, veteran status (specifically status as a disabled veteran, special disabled veteran, Vietnam Era veteran, recently separated veteran, armed forces service medal veteran, or other protected veteran) or other classification protected by applicable federal, state or local law.

AI Transparency Statement

FastSpring may utilize artificial intelligence (AI) or automated tools during portions of the recruitment process to assist with operational and administrative activities, including candidate communications, scheduling, application organization, and interview documentation. These tools are designed to support efficiency and consistency within the hiring process. AI systems are not used as the sole determinant of hiring outcomes, and all employment decisions are made by qualified human reviewers. We are committed to responsible and fair hiring practices and continue to evaluate our use of technology accordingly.