{"id":4210238,"url":"https://alion.io/job/coderio-sr-fullstack-developer-javascriptjava","title":"Sr. Fullstack Developer (Javascript/Java)","company":{"id":16386,"name":"Coderio","domain":"coderio.com","url":"https://alion.io/company/coderio","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":79,"open_postings":6,"ghost_share":0,"stale_share":0.833,"repost_share":0,"time_to_fill_p50_days":33,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Buenos Aires, Argentina","Montevideo, Uruguay"],"countries":["AR","UY"],"hiring_countries":["AR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"JavaScript","optional":false},{"name":"Kubernetes","optional":false},{"name":"MySQL","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"DynamoDB","optional":true},{"name":"Go","optional":true},{"name":"Java","optional":true},{"name":"Node JS","optional":true}],"status":"live","first_seen_at":"2026-11-12T19:35:34Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-13T07:24:45Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Coderio designs and delivers scalable digital solutions for global businesses. With a strong technical foundation and a product mindset, our teams lead complex software projects from architecture to execution. We value autonomy, clear communication, and technical excellence. We work closely with international teams and partners, building technology that makes a difference.\nLearn more: http://coderio.com\nIn this role, you'll lead the end-to-end development of high-impact fintech platforms by designing, coding, and deploying scalable web applications. You'll collaborate with cross-regional teams, design robust microservices, and optimize performance for massive international traffic-all while delivering scalable, high-quality solutions that drive measurable business results.\nWhat to Expect in This Role (Responsibilities)\nDesign, code, and deploy high-volume, low-latency web applications, ensuring consistency across backend and frontend logic.\n\nDesign and consume robust REST APIs to integrate securely with acquirers, local banks, and Alternative Payment Methods (APMs).\n\nMonitor and tune backend and database performance to support massive international financial traffic spikes without service degradation.\n\nWrite clean, maintainable, and highly testable code (Unit/Integration Testing), integrating it seamlessly into automated CI/CD pipelines.\nCollaborate with technical teams to adopt AI tools and coding copilots into the daily development workflow to optimize delivery times. \nRequirements\nAdvanced English (written and spoken) is a strict must-have requirement for daily remote collaboration with global teams.\nSolid, proven experience using Java (Spring / Spring Boot) as the primary language for the core financial ecosystem.\nAdvanced proficiency in React, JavaScript, TypeScript, and modern frameworks.\nExperience with high-performance relational databases such as MySQL or PostgreSQL, including complex query optimization.\nHands-on experience working with AWS (Amazon Web Services) and container ecosystems (Docker / Kubernetes).\nStrong soft skills: \"Own it\" mindset (accountability), flexibility to pivot in a dynamic fintech environment, and clear technical communication.\nNice to Have\nComplementary experience with Node.js or Golang.\nKnowledge of NoSQL databases, specifically DynamoDB.\nBackground in payments or financial systems.\nBenefits\n100% remote\nLong-term commitment, with autonomy and impact\nStrategic and high-visibility role in a modern engineering culture\nCollaborative international team and strong technical leadership\nClear path to growth and leadership within Coderio\nWhy join Coderio?\nAt Coderio, we value talent regardless of location. We are a remote-first company, passionate about technology, collaborative work, and fair compensation. We offer an inclusive, challenging environment with real opportunities for growth. 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