{"id":2173861,"url":"https://alion.io/job/okto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv","title":"Mid-Senior Java Software Engineer (Remote - Argentina) - ARG112-DV","company":{"id":679981,"name":"OKTO Payments","domain":"oktopayments.com","url":"https://alion.io/company/oktopayments","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Buenos Aires, Argentina"],"countries":["AR"],"hiring_countries":["AR"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":49000,"max_usd":115000,"period":"year","method":"role_seniority_country_cell","sample_n":8},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"Spring Boot","optional":false},{"name":"Spring Cloud","optional":false},{"name":"Spring Framework","optional":false},{"name":"AWS","optional":true}],"status":"live","first_seen_at":"2026-10-09T13:13:18Z","employer_posted_date":"2026-10-09","last_verified_at":"2026-10-15T07:26:16Z","board_verified":true,"closed_at":null,"days_open":5,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":5},"description":"OKTO’s continuous growth demands high-caliber candidates who embody professionalism, passion, and creativity. For those who join us, we offer significant career advancement, stimulating challenges, and a clear runway for growth.\nOKTO is the next-generation Payment Service Provider - AI-native, precision-engineered, and relentlessly merchant-obsessed. Built for merchants operating in the most complex and demanding eCommerce sectors, our platform goes far beyond transaction processing. We solve for scale, compliance, and performance with one unshakable focus: delivering outcomes that power merchant growth.\nFrom payments and banking to treasury and settlement, we engineer the financial infrastructure that gives our partners a competitive edge. The result? Faster onboarding, smarter operations, and resilient, real-time performance.\nAt OKTO, we enable merchants to Play Differently, transforming payments from routine transactions into true differentiators that deliver personalized, frictionless experiences.\nOur AI-native innovation harnesses data and insight to power every decision, while our proprietary in-house engineering ensures precision and control. Combined with deep, trust-based relationships worldwide, we’re redefining what it means to build, scale, and win in complex digital commerce.\nSummary\nAs a Java Middleware Engineer, you will play a key role in designing, developing, and maintaining the middleware services that power our next-generation payment platform. You will contribute to the development of scalable, secure, and high-performance applications that process millions of financial transactions, while collaborating with Product, Architecture, Infrastructure, QA, and Security teams.\nKey Responsibilities\nDesign, develop, and maintain middleware applications and backend services using Java and Spring technologies.\nDevelop new product features and platform capabilities based on business and technical requirements.\nBuild scalable, resilient, and high-performance microservices that support payment processing and financial transaction workflows.\nWrite clean, maintainable, and performance-optimized code, ensuring high-quality standards and comprehensive unit test coverage.\nParticipate in the design and implementation of distributed systems and event-driven architectures.\nDevelop and maintain RESTful APIs and secure service integrations using modern authentication mechanisms such as OAuth2.\nSupport System Integration Testing (SIT), User Acceptance Testing (UAT), and Production environments, identifying and resolving issues to ensure platform stability.\nCollaborate with cross-functional teams, including Product Managers, QA Engineers, DevOps Engineers, and Solution Architects, to deliver high-quality software solutions.\nParticipate in Agile ceremonies, code reviews, technical discussions, and knowledge-sharing initiatives.\nContribute to continuous improvement by identifying opportunities to optimize software quality, development processes, and system performance.\nWork with version control systems and CI/CD pipelines, following engineering best practices and software development standards.\nProduce technical documentation, including product specifications, design documentation, and implementation details.\nRequirements\nBachelor's degree in Computer Science, Computer Engineering, Software Engineering, Information Technology, or a related field.\nMinimum of 5 years of professional experience developing middleware or backend applications using Java.\nAt least 1 year of hands-on experience with Java 11 or newer.\nProven experience working within the FinTech, Payments, Banking, or Financial Services industry.\nStrong understanding of Object-Oriented Design (OOD), SOLID principles, and Functional Programming concepts.\nExperience designing and developing microservices architectures using Spring Boot and Spring Cloud (Netflix OSS).\nSolid knowledge of the Spring Framework 5 ecosystem.\nExperience implementing secure authentication and authorization using OAuth2.\nExperience with JPA, ORM modeling, and persistence frameworks.\nStrong experience designing and developing RESTful APIs.\nFamiliarity with Event-Driven Architecture, asynchronous messaging, and distributed software design patterns.\nExperience working with Git and collaborative source control workflows.\nGood understanding of software development best practices, including unit testing, clean code principles, and code review processes.\nStrong analytical, problem-solving, and troubleshooting skills.\nAbility to work independently while collaborating effectively within an international engineering team.\nExcellent technical writing skills for documenting requirements, software designs, and technical specifications.\nPreferred Qualifications\nExperience with cloud platforms such as AWS.\nFamiliarity with CI/CD pipelines and DevOps practices.\nExperience working in high-volume transaction processing environments.\nKnowledge of payment processing concepts, transaction lifecycle, settlement, reconciliation, or payment gateway integrations.\nExperience with monitoring, logging, and application performance optimization.\nLanguages\n Advanced English (mandatory), with the ability to participate in technical discussions, collaborate with international teams, and produce technical documentation.\n Spanish (mandatory).\nPlease submit your resumé in English.\nBenefits\nCompetitive Compensation - Competitive salary package.\nCareer Growth - Career development opportunities in a growing global fintech.\nContinuous Learning - Access to challenging projects and continuous learning opportunities.\nInclusive Environment - Collaborative, diverse, and international work environment.\n Birthday Leave - Paid day off on your birthday.","description_format":"text","description_chars":5736,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"Spanish","level":"All levels","optional":false},{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Continuous learning"],"hiring_locations":[{"name":"Argentina","iso":"AR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Payment Processing & Gateways"],"lifecycle":[{"event":"open","at":"2026-10-09T13:13:18Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":5,"expected_fill_days":61,"reasons":["conf:2","win:early"],"computed_at":"2026-10-15T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/okto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv","json_url":"https://alion.io/job/okto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv.json","meta":{"generated_at":"2026-10-15T11:14:59Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":17360,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":679981},"rest":"https://alion.io/mcp/rest/get_company?id=679981"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fokto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fokto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fokto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/okto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fokto-payments-mid-senior-java-software-engineer-remote-argentina-arg112-dv"}]}