Javascript Developer

Optomi, in partnership with one of the largest automotive financing companies, is seeking a JavaScript Developer responsible for driving technical investigation, requirements definition, vendor coordination, and cross-team delivery within the Payments Engineering organization. The role operates across a portfolio of concurrent initiatives spanning vendor integrations, platform modernization, and payment-experience delivery - providing dedicated systems-level ownership of work that bridges engineering, product, operations, and external partners.What the right candidate will enjoy!The ability to work remotely 2 days a week!The opportunity to provide full time ownership of the technical investigation, requirements exploration, documentation, and cross-team coordination necessary to advance the Payments Engineering Portfolio!The ability to grow and transition with the role over time!Experience of the right candidate:Strong software engineering background.Deep understanding of REST APIs, HTTP semantics, and integration patterns.Experience with cloud services (AWS preferred).Proficient with observability tooling.Deep understanding of distributed system behavior.Experience in financial services, payments, or banking.Familiarity with payment concepts (ACH, wires, real-time payments, settlement, returns).Relevant certifications such as AWS Developer Associate or AWS Solutions Architect Associate.Has a modern technology stack over a traditional bank stack.Proficient with JavaScript/ TypeScript, Java, and Python.Experience with serverless architecture patterns.Responsibilities of the right candidate:Investigate vendor APIs, platform behaviors, and integration patterns to identify gaps, undocumented constraints, and failure modes.Produce clear technical documentation including sequence diagrams, error flow mappings, API inventories, requirements specifications, and decision records.Own the documentation lifecycle for assigned workstreams - keeping materials current as understanding evolves and new information surfaces.Translate findings into actionable requirements consumable by engineering, product, vendor, and operations teams.Maintain traceability from observed behavior and business need through documented requirement and implementation.Define current-state and future-state process flows, system interactions, data flows, control points, and exception scenarios for assigned payment experiences.