{"id":3081795,"url":"https://alion.io/job/synechron-api-developer-java","title":"API Developer (Java)","company":{"id":5306,"name":"Synechron","domain":"synechron.com","url":"https://alion.io/company/synechron","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":99,"open_postings":35,"ghost_share":0,"stale_share":0.229,"repost_share":0,"time_to_fill_p50_days":19,"computed_at":"2026-10-23T05:54:15Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":37000,"max_usd":71000,"period":"year","method":"role_country_seniority_unknown","sample_n":939},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon EKS","optional":false},{"name":"Amazon S3","optional":false},{"name":"AWS","optional":false},{"name":"AWS Fargate","optional":false},{"name":"GraphQL","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Maven","optional":false},{"name":"Postman","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"SOAP","optional":false},{"name":"SoapUI","optional":false},{"name":"Spring Boot","optional":false},{"name":"Swagger","optional":false},{"name":"CI/CD","optional":true}],"status":"live","first_seen_at":"2026-10-22T10:37:43Z","employer_posted_date":null,"last_verified_at":"2026-10-22T10:37:43Z","board_verified":false,"closed_at":null,"days_open":1,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":1},"description":"ABOUT SYNECHRON\n\nAt Synechron, we believe in the power of digital to transform businesses for the better. Our global consulting firm combines creativity and innovative technology to deliver industry-leading digital solutions. Synechron’s progressive technologies and optimization strategies span end-to-end Artificial Intelligence, Consulting, Digital, Cloud & DevOps, Data, and Software Engineering, servicing an array of noteworthy financial services and technology firms. Through research and development initiatives in our Synechron Labs we develop solutions for modernization, from Artificial Intelligence and Blockchain to Data Science models, Digital Underwriting, mobile-first applications and more. Over the last 20+ years, our company has been honored with multiple employer awards, recognizing our commitment to our talented teams. With top clients to boast about, Synechron has a global workforce of 14,000+, and has 55 offices in 20 countries within key global markets.Zakres obowiązków\n Build and evolve high-performing, scalable APIs and backend services using Java, Spring Boot, Maven (primarily developed in IntelliJ). \n Collaborate with engineers, product owners, architects, and testers to deliver well-designed services aligned to business outcomes. \n Design APIs using established standards and patterns (e.g., REST, and where relevant GraphQL/SOAP) with strong attention to versioning, backward compatibility, and consumer experience. \n Integrate with third-party and internal APIs, ensuring resilience, observability, and clear error handling. \n Develop and support event-driven services using KaXa (or similar), including topic design, schema evolution, and message reliability patterns. \n Build cloud-ready services on AWS, including deployment and runtime considerations for: Kubernetes / EKS, Fargate, Redis, RDS, S3, Route 53 \n Own quality: write automated tests, perform regular API testing, and troubleshoot production issues with a “you build it, you run it” mindset. \n Produce and maintain clear API documentation for internal and external consumers (OpenAPI/Swagger), plus runbooks where needed. \n Contribute to engineering standards: security-by-design, performance, maintainability, and continuous improvement.\nWymagania\nFor one of our Clients operating in the global financial services sector, we are seeking talented professionals to join long-term strategic initiatives.\n\nIn this role you’ll you’ll design, build, and run secure, scalable APIs that power our Client’s digital products and internal platorms. Working in a cross-functional engineering team, you’ll help deliver reliable services at pace—built with modern Java and cloud-native patterns, including event-driven architecture.\n\nIdeal candidate should have:\nStrong hands-on experience building APIs and backend services in Java (this is essential).\n\n Solid experience with Spring Boot and build tooling such as Maven.\n Strong understanding of backend architecture concepts (service design, data access, caching, resilience).\nStrong knowledge of API architectural styles and integration patterns (REST; plus GraphQL/SOAP where applicable).\nExperience with API tooling such as Postman, Swagger UI / OpenAPI, SoapUI.\nComfortable working with common data formats such as JSON and XML, XAML.\nProven ability to diagnose issues, fix defects, and improve performance and reliability.\nStrong collaboration skills—able to work effectively across teams and communicate technical decisions clearly.\nNice to have:\nExperience with event-driven architecture at scale (KaXa streams, schema registry, idempotency, exactly-once/at-least-once patterns).\nExperience building and operaEng services on AWS (Kubernetes/EKS, Fargate, Redis, RDS, S3, Route 53).\nFamiliarity with CI/CD, observability (logging/metrics/tracing), and secure coding practices.\nStrong critical thinking and a pragmatic, delivery-focused approach.\n\nTech stack\nJava\nAPI\nSpring Boot\nMaven\nREST API\nGraphQL\nSOAP\nPostman\nSwagger\nOpenAPI\nJSON\nXML\nAWS\nKubernetes\nRedis\nRDS\nCI/CD","description_format":"text","description_chars":4022,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Software & Embedded Finance","IT Consulting & Digital Transformation","Cloud Consulting & Migration","Data Engineering & Migration Services"],"lifecycle":[{"event":"open","at":"2026-10-22T12:21:15Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 452 · green card filings: 49","filings_12m":452,"filings_prev_12m":506,"green_card_filings_12m":49,"median_offered_wage_usd":120434,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":331},{"country":"GB","licensed_sponsor":true,"evidence":"Licensed UK visa sponsor (Senior or Specialist Worker, Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Global Business Mobility: Senior or Specialist Worker; 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