Senior Staff Software Engineer, Partner Integrations

Remote: yes Posted: 2026-09-18

Flex is a growth-stage, NYC headquartered FinTech company that is building the payment layer for life's financial obligations, giving households one place to see, split, and pay their bills around how they live and get paid. By offering greater choice over how and when payments are made and allowing eligible on time payments to help build a positive credit history, Flex puts households back in control of their cash flow.

That work brings together people with different perspectives who challenge the status quo and take ownership of solving difficult problems. For you, that means doing the best work of your career next to people who make you better, and together bringing ideas to life that make a real impact for the people we serve.

- Bachelor or above degree in Computer Science or a related field

- Minimum of 10 years experience in software engineering, with at least 3 years of technical leadership experience in a hands-on capacity

- Ability to work on a globally-distributed team with a high degree of ownership

- Experience leading the delivery of multiple highly impactful products end to end, on time with a high quality bar

- Experience working with technical and non-technical stakeholders, successfully aligning and setting expectations on scope and delivery

- Ability to drive yourself and your team to bring quality and consistency to their code and architecture, without compromising velocity

- Ability to grow in a fast-paced and dynamic environment that will challenge you to always bring your best

- Experience in designing and developing solutions that maximize ROI and lead to significant business impact

- Experience working in FinTech and familiar with major payment rails

- Experience working with Sales stakeholders and/or building products for Sales professionals

- Experience building integrations with external partners & managing relationships with external stakeholders

- Experience working on AWS cloud based applications

Flex takes a market-based approach to pay, and compensation may vary depending on your primary work location. Work locations are categorized into one of three tiers based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be commensurate with their experience, qualifications, and Flex’s internal leveling guidelines and benchmarks.

Tier 1 (NYC/Bay Area, Los Angeles, Seattle)

$240,000—$300,000 USD

Tier 2 (Austin, Washington D.C. Philadelphia, San Diego, Chicago, Atlanta)

$216,000—$270,000 USD

Tier 3 (Salt Lake City, all other USA cities)

$204,000—$255,000 USD

View our benefits and more at getflex.com/careers.