Software Engineer (SDK)

Lumin Digital; United States; Remote; USD 155,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) with company match

Flexible PTO

12 paid holidays

Paid sick leave

Parental leave

Lifestyle spending account

Tuition reimbursement

Cell phone stipend

Job summary

Lumin Digital is seeking a Software Engineer (SDK) to address a broad range of software development needs, including SDK & API support for external developers and client project scoping. The role involves collaboration with product management, implementations, customer support, and sales, while mentoring and contributing to a high-performing team.

The ideal candidate brings traditional development experience, strong client-facing skills, and expertise in the FinTech ecosystem, including Docker

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• 5 years of engineering/architecture experience, with some client-facing work.
• Experience with SaaS platforms featuring SDKs and deep API integrations.
• Experience with microservice architecture.
• Familiarity with containerization tools like Docker.
• Experience with AWS or other cloud platforms.

Responsibilities

• Onboard new SDK users via virtual or on-site training sessions.
• Provide external SDK support, including problem determination and code reviews for quality and stability.
• Estimate development projects after understanding the tech stack; draft statements of work to prevent scope creep.
• Adapt product development across backend and frontend for hundreds of integrations and features.
• Provide solution consulting to address gaps in user workflows or back-office operations.
• Write well-designed, testable, efficient, and maintainable code.
• Collaborate with product management, implementations, customer support, and sales.
• Support production operations and ensure timely incident resolution.
• Contribute to a high-performing team and drive continuous improvement.
• Lead team efforts using Atlassian tools and drive change for growth.
• Perform other duties as assigned.

Skills

TypeScript

C#

Java

Project management

Communication

Problem solving

Education

Bachelor's degree in Computer Science/Engineering or related field

Tools

Docker

AWS

Job description

Basic Function

The Software Engineer (SDK) at Lumin Digital is responsible for addressing a wide range of software development needs, including traditional product development, internal and external solution consulting, client project scoping and bidding, SDK and API support for external developers, and assisting the sales organization with technical demos to prospects. Leveraging a strong foundation in software engineering principles and professional experience, the ideal candidate brings traditional development experience, comfort interfacing directly with clients to provide support and consulting services, and is well-versed in vendors and technologies within the FinTech ecosystem.

Essential Functions and Responsibilities:

• Onboard new SDK Users by leading virtual or traveling onsite for SDK training sessions.

• Provide external SDK Support services, including problem determination for development environments, and conduct code reviews that adhere to general code quality, stability, and supportability guidelines.

• Obtain a thorough understanding of the Lumin Digital tech stack platform to accurately estimate development projects of varying complexities, from small to large. Collaborate with other developers and product owners to formulate fair, legally binding statements of work, resulting in proposals that are free from scope creep risks.

• Able to adapt and perform product development to various subject matter areas of the product suite, from the backend to the frontend, for the hundreds of integrations and features within the product.

• Provide solution consulting services to clients, helping to solve gaps and other pain points with user workflows or back office operations.

• Write well-designed, testable, efficient, and maintainable code.

• Collaborate with various organizations from product management, implementations, customer support, and sales.

• Support production operations, ensuring smooth performance and timely resolution of incidents.

• Contribute to a high-performing development team, fostering collaboration and continuous improvement.

• Wear multiple hats to steer the team for success by constantly improving team efficiencies with the Atlassian product suite and naturally spearheading change for a fast-growing organization.

• Perform other duties as assigned.

Phy** sical Demands:

• While performing the duties of this Job, the employee is regularly required to sit; use hands to type, handle, or feel and talk or hear

• Specific vision abilities required by this job include close vision

• Ability to occasionally lift/move up to 25 pounds

• Individuals with a disability who are otherwise able to perform the essential functions of the job may request reasonable accommodation through the Human Resources department.

Position Specifications

Education:

• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent work experience.

Experience:

• 5 years of experience in engineering, architecture, with some of those years being client facing

• Experience working with Saas platforms with an SDK and deep API integration projects.

• Experience with microservice architecture.

• Familiarity with containerization tools like Docker.

• Experience with AWS or other cloud platforms.

Knowledge, Skills, & Abilities:

• Strong object-oriented programming skills in TypeScript, C#, Java, or similar languages.

• Ability to manage multiple projects in a fast-paced environment, meeting objectives and maintaining high-quality standards.

• Excellent communication and interpersonal skills, with the ability to work collaboratively within a team.

• Strong problem-solving skills and a proactive approach to troubleshooting and debugging.

Travel:

• Minimal, generally 12 days or less per year

$155,000 - $180,000 a year

LIFE AT LUMIN DIGITAL

Lumin Digital is a trailblazer in digital banking solutions, driven by a unique approach to technology, service, and people. We empower credit unions and banks by creating cutting-edge digital experiences that continuously serve, engage, and grow their membership base — and as a 100% cloud-native company, we’re purpose-built to unlock the full advantages of the cloud for financial institutions and their users.

At Lumin, we thrive on curiosity and innovation. Our culture is built on trust in our expertise and decisions, respect for diverse perspectives and talents, and boldness in pursuing new ideas. These values shape a workplace where collaboration thrives, ideas flourish, and new possibilities are discovered every day. We encourage our team to explore, experiment, and challenge the status quo — because continuous improvement isn’t just a goal, it’s how we operate.

Benefits include: We take care of our people with medical, dental, and vision insurance, a 401(k) with company match, flexible PTO plus 12 paid holidays, paid sick leave, and paid parental and family leave. We also offer a lifestyle spending account, tuition reimbursement, and a cell phone stipend. Additional details are provided during the interview process.

Lumin Digital is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, national origin, disability, protected veteran status, sexual orientation, gender identity, or any other legally protected basis. For more information, visit lumindigital.com.