Senior Staff Software Engineer, Partner Integrations

Devconnectplatform; New York (NY); Hybrid; USD 240,000 - 300,000; Full time

Benefits offered by this job

Company equity

401(k) plan with company match

Unlimited PTO + holidays

Parental leave

Competitive medical, dental, andvision

Job summary

Flex, a NYC headquartered FinTech, is hiring a Senior Staff Software Engineer for Partner Integrations. You will lead the technical roadmap across APIs, SDKs, and web experiences, coordinating with cross-functional teams to align delivery with business goals.

You will be hands-on, own critical integrations with external partners and drive scalable architectures on AWS, focusing on ROI and high-quality delivery in a fast-paced environment. This role is remote with flexible hybrid options.

Qualifications

• Bachelor or above degree in Computer Science or related field.
• 10+ years of software engineering experience with at least 3 years in technical leadership.
• Experience building integrations with external partners & managing relationships with external stakeholders.
• Experience working with AWS cloud-based applications.

Responsibilities

• Oversee the technical roadmap for Partner Integrations, across APIs, SDKs, and web experiences.
• Collaborate with Engineering, Product, Design, Infrastructure, Sales, and Customer Success to align delivery with business goals.
• Be hands-on and contribute code while guiding the team toward scalable, high-quality solutions.
• Lead delivery of multiple integration projects end-to-end, on time and with strong ROI.

Skills

Technical leadership

Distributed systems

APIs & integrations

Cross-functional collaboration

Code quality & delivery

Education

Bachelor's degree in Computer Science or related field

Tools

AWS

Job description

# Senior Staff Software Engineer, Partner IntegrationsFlex204k–300k USDFull-timeremote· leadrailsawsListed via Jobicy · posted 14 Oct 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionFlex is a growth-stage, NYC headquartered FinTech company that is creating the best rent payment experience. It’s hard to believe that it’s 2026 and paying rent on time is expensive, inflexible, and difficult. We’re here to change that! Flex enables our users to pay rent throughout the month on a schedule that better fits their finances and budget. Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense. After deliberately keeping a stealth profile as we built up unprecedented investor support and an enthusiastic user base, we are looking for motivated individuals to help us keep our mission growing. Will you be a part of the team?About Our OpportunityFlex exists to make paying rent work the way real life actually works — smoothing out cash flow, helping renters avoid late fees, and letting them build credit instead of falling behind. As a Senior Staff Software Engineer, you'll oversee the technical roadmap for the team, working across APIs, SDKs, and Web experiences. You will work with teams across the organization including Engineering, Product, Design, Infrastructure, Sales, Partner and Customer Success to ensure that the technical strategy meets our goals. We expect you to be hands-on and execute work as an individual, and build products that allow for flexibility as we evolve our product offerings.About Our Team!We have some really exciting teams who are looking for an amazing engineer like you! Check them out!- Partner Integrations - Partner integrations work to standardize APIs, tools, and processes that let external partners connect to Flex for data sharing and payments across entry points like Flex AnywhereWho thrives here?- A Doer — you get things done efficiently, and you're comfortable rolling up your sleeves when something's blocking the team.- An Owner — you take full accountability for what you build, from design through production, and you always have a plan B.- Someone Collaborative — you bring people together to pressure-test ideas rather than working in a silo.- Someone with Precision — your code and your communication are both clear, because ideas only matter once others can act on them.- Someone Resilient — systems break and priorities shift, and you adapt without losing momentum.- Someone Humble — you care more about getting to the right answer than being the one who's right.Qualifications:- 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 applicationsCompensationFlex 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 USDTier 2 (Austin, Washington D.C. Philadelphia, San Diego, Chicago, Atlanta)$216,000—$270,000 USDTier 3 (Salt Lake City, all other USA cities)$204,000—$255,000 USDLife at FlexWe understand that it takes a diverse team of highly intelligent, curious, determined, empathetic, and self aware people to grow a successful company. Our HQ is located in New York City, but we have employees located throughout the US, Australia, Canada and South America. We are growing quickly, but deliberately, with a focus on building an inclusive culture. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity workplace.OfficesRoles posted in New York, San Francisco, and Salt Lake City are hybrid positions with on-site expectations of 2-3 days per week in our local offices. For candidates outside of these areas, you may be eligible for our relocation assistance program.BenefitsFor full-time U.S. employees we offer:- Competitive medical, dental, and vision- Company equity- 401(k) plan with company match- Unlimited paid time off + 13 company paid holidays- Parental leave- Free Flex subscriptionFor full-time non-U.S. employees, we offer:- Competitive compensation + company equity- Unlimited PTO