[Remote] Integration Engineer

Note: The job is a remote job and is open to candidates in USA. Light is a company focused on modernizing financial operations through its Smart Financial Platform. The Integrations Engineer role involves building and operating integrations with various banking APIs and financial systems to ensure seamless data flow and reliability.ResponsibilitiesBuild against corporate banking and payments APIs—account information, payment initiation, status reporting, FX—across providers like J.P. Morgan Payments and HSBCDesign integrations where credentials, configuration, and data are isolated per tenantConnect Light to e-invoicing networks and country-specific mandatesMap between formats, manage compliance-driven edge cases, and keep delivery auditableIdempotency, retries, webhook and polling strategies, dead-letter handling, and end-to-end reconciliationSkills4-6 years of experience ideallyYou build things. Not prototypes, not demos. Working software in production, doing something real for real users. This is the non-negotiableYou've built integrations against unforgiving external systems. APIs you don't control, that fail in ways the docs don't mention, where correctness is contractual. You know how to defend a system against a partner that returns a 200 with an error in the bodyYou know banking and payments APIs. Direct, hands-on experience with corporate banking, treasury, or payments APIs is what sets the strongest candidates apart. Experience integrating J.P. Morgan or HSBC specifically—their developer platforms, auth models, and payment and reporting APIs—is highly valuable and a genuine differentiator for this role. Familiarity with ISO 20022, SWIFT, virtual accounts, or open banking is a strong signalYou are excited about AI. You use AI tooling efficiently to improve your work. At Light, a lot of code is written with AI, which means the hard part is increasingly the thinking: deciding what to build, reviewing what comes back, and catching where the model is confidently wrong. You know when AI speeds you up, when it's likely to mislead you, and how to lean on it while staying fully responsible for what shipsYou're comfortable across the stack. You don't need to be a specialist in everything, but you can't have a lane you refuse to leave. Our stack is Kotlin and React, and this role leans backend. If you're strong on the backend and curious about the rest, that worksYou care about data integrity. You think about the person on the other end and the money moving between them. You notice when a flow is correct but fragile, and you act on itYou ship early and often. Small batches. Learn. Go again. You'd rather put something real in front of a customer than spend another week perfecting it in isolationExperience in fintech or systems where data integrity is non-negotiableFamiliarity with accounting concepts: debits, credits, reconciliationExperience with e-invoicing standards or country-specific compliance regimesBackground in high-growth startups where everything was still being figured outBenefitsA competitive salary + potential stock options25 days of annual leave + public holidays in the country where you are basedRegular socials and company off-sitesA huge opportunity for career growth as you'll help shape a market-defining productCompany OverviewLight is a financial platform that offers fully automated general ledger and other accounting solution services for multinational companies. It was founded in 2023, and is headquartered in Copenhagen, Hovedstaden, DNK, with a workforce of 51-200 employees. Its website is https://light.inc.