{"id":1117442,"url":"https://alion.io/job/kunai-c1-gpn-java-engineers-for-arpetb-integration","title":"C1: GPN - Java Engineers for ARP/ETB Integration","company":{"id":4206,"name":"Kunai","domain":"kunai.io","url":"https://alion.io/company/kunai","size_band":null,"is_staffing_agency":false,"is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":83,"open_postings":3,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":29,"computed_at":"2026-09-24T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":138000,"max_usd":228000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":688},"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon Aurora","optional":false},{"name":"Amazon S3","optional":false},{"name":"Apache Camel","optional":false},{"name":"Apache Kafka","optional":false},{"name":"Apache Tomcat","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Copilot","optional":false},{"name":"IAM","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Liquibase","optional":false},{"name":"Next.js","optional":false},{"name":"Okta","optional":false},{"name":"OpenShift","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"Claude","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-22T15:07:36Z","employer_posted_date":"2026-09-22","last_verified_at":"2026-09-24T12:46:28Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Kunai builds full-stack technology solutions for banks, credit and payment networks, infrastructure providers, and their customers. Together, we are changing the world’s relationship with financial services. At Kunai, we help our clients modernize, capitalize on emerging trends, and evolve their business for the coming decades by remaining tech-agnostic and human-centered.\nWe are seeking a Senior Software Engineer to join a high-impact digital payments modernization program supporting the integration of a major card network into one of the largest financial institutions in the United States. This is a hands-on engineering role at the intersection of legacy and modern infrastructure, where you will contribute to both the reliability of mission-critical payment systems today and help shape the architecture that will power them tomorrow.\nSome things you may work on\nYou will be embedded across one or more workstreams supporting digital payments engineering, with responsibilities that may include:\nDomain & Service Architecture\nApply domain-driven design to define bounded contexts, domain models, and aggregate boundaries for card-network reference data - establishing a ubiquitous language shared across engineering and business stakeholders.\nDevelop and harden a Spring Boot / JPA / PostgreSQL Aurora service with Liquibase-managed schema migrations, a Drools-based business rules engine, and scheduled batch jobs - including designing authorization and data-access controls from the ground up where none exist today.\nDesign and own integration workflows and routing using Apache Camel (or equivalent), orchestrating multi-step, stateful operations such as request intake, validation, approval, and publication pipelines.\nDevelop an event-driven backbone using Kafka - topic/schema design, producer/consumer reliability patterns, and integration with the rules engine and workflow layer.\nFrontend & Identity\nDevelop a micro-frontend application (Next.js/React/TypeScript) as an independently deployable system, and design its convergence path into the card network's future shared micro-frontend shell.\nOwn the OAuth2/OIDC identity architecture end-to-end - provider integration (Okta), JWT/token validation strategy, session/revocation design, and trust-boundary decisions across environments.\nCloud & Platform\nDesign and govern AWS IAM policy, S3, and CloudFront architecture across multiple environments - this is not config-following; you're expected to set the standard.\nLead deployment on the organization's internal static cloud hosting platform.\nDrive test-driven development practice across the team and build out continuous testing/automation pipelines (unit, contract, integration, and end-to-end) as part of CI/CD.\nScalability, Performance Testing & Validation\nDesign and execute enterprise-grade performance testing strategies for payment processing services, defining frameworks, tooling, and success criteria from the ground up.\nIdentify performance bottlenecks across legacy and modern service layers and drive measurable improvements through analysis and targeted optimization.\nInstrument and validate services running on Java, Oracle, Tomcat, and WebSphere as well as modern workloads running on PostgreSQL and OpenShift.\nCollaborate with backend engineers to ensure scalability requirements are met across all environments prior to release.\nTranslate performance findings into clear recommendations for engineering leads and stakeholders.\nApplication Engineering\nBuild and maintain full-stack backend services supporting card network integration, working primarily in Java with PostgreSQL and OpenShift Container Platform (OCP).\nContribute to application modernization efforts, migrating and re-platforming services from legacy infrastructure to cloud-native environments.\nLeverage AI-assisted development tooling (including GitHub Copilot) to improve development velocity and code quality.\nParticipate in code reviews, architectural discussions, and cross-team technical planning sessions.\nGeneral Engineering\nPCI data purging pipelines and event-driven architecture patterns including token removal and event consumption.\nWork with event-driven services running on OpenShift and Oracle and PostgreSQL backends to support data lifecycle and compliance requirements.\nServe as a flexible, senior contributor across teams where engineering depth and experience are needed most.\nREQUIRED SKILLS & EXPERIENCE\nCore Engineering\n5+ years of professional software engineering experience, primarily in Java.\nStrong working knowledge of relational databases - Oracle and/or PostgreSQL required; hands-on experience with PostgreSQL Aurora and Liquibase-managed migrations a strong plus.\nExperience deploying and operating services in containerized environments (OpenShift, Kubernetes, or equivalent).\nFamiliarity with legacy enterprise application servers - Tomcat and/or WebSphere experience a plus.\nExperience with Spring Boot/JPA, business rules engines (e.g., Drools), and integration/orchestration frameworks (e.g., Apache Camel).\nWorking knowledge of Kafka or similar event-streaming platforms, including topic/schema design and producer/consumer reliability patterns.\nArchitecture & Design\nPractical experience applying domain-driven design - bounded contexts, aggregates, and ubiquitous language - in a production system.\nDemonstrated ownership of authorization/data-access control design, not just implementation against an existing model.\nExperience designing and governing cloud IAM, storage, and CDN architecture (AWS IAM, S3, CloudFront or equivalents) at a standards-setting level.\nFrontend & Identity\nExperience with modern frontend frameworks (Next.js/React/TypeScript), including micro-frontend architectures and independently deployable frontend systems.\nExperience owning OAuth2/OIDC identity flows end-to-end, including provider integration (e.g., Okta), token validation, and session/revocation design.\nPerformance Engineering\nAt least one enterprise-level performance testing engagement - defining strategy, selecting tooling, executing tests, and presenting findings.\nExperience with performance profiling, load testing, and bottleneck resolution in high-throughput, distributed systems.\nAbility to design logical, streamlined test frameworks from scratch and operate with minimal guidance.\nTesting & CI/CD\nDemonstrated experience driving test-driven development practices across a team.\nExperience building continuous testing/automation pipelines (unit, contract, integration, and end-to-end) as part of CI/CD.\nPayments & Financial Services\nBackground in digital payments, card processing, or financial services technology strongly preferred.\nUnderstanding of PCI compliance requirements and secure data handling practices.\nFamiliarity with event-driven architecture patterns and OpenShift-based eventing.\nCollaboration & Communication\nDemonstrated ability to work effectively in large, matrixed program environments with multiple teams and stakeholders.\nStrong written and verbal communication skills; able to translate technical complexity for non-technical audiences.\nComfortable operating in environments with evolving requirements and ambiguity.\nNICE TO HAVE\nExperience with PGLogical or PostgreSQL logical replication.\nExposure to AI-assisted development tools (GitHub Copilot or Claude).\nPrior work on bank or card network integration programs.\nExperience working in segregated or air-gapped development environments.\nAt this time we are unable to provide sponsorship for this role.\nOur success over the past 20 years is rooted in our exceptional team, which thrives in a culture of collaboration, creativity, and continuous learning. \nWe are proud to offer our employees a range of benefits, including competitive compensation, professional development opportunities, and flexible work arrangements, all designed to help them thrive. As we continue to expand, we remain committed to cultivating an environment where people feel valued, have a voice, and are given the tools to grow-both personally and professionally-while pushing the boundaries of innovation in the fintech industry.\nMinimum Degree Required:\nBachelor’s Degree, in lieu of a degree, demonstrating in addition to the minimum years of experience required for the role, three years of specialized training and/or progressively responsible work experience in technology for each missing year of college is required","description_format":"text","description_chars":8430,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Continuous learning","Flexible schedule","Professional development"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Web3 & dApps","Blockchain Infrastructure"],"lifecycle":[{"event":"open","at":"2026-09-22T17:08:00Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":29,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-09-24T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/kunai-c1-gpn-java-engineers-for-arpetb-integration","json_url":"https://alion.io/job/kunai-c1-gpn-java-engineers-for-arpetb-integration.json","meta":{"generated_at":"2026-09-24T14:56:18Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}