{"id":4039718,"url":"https://alion.io/job/nerdysoft-java-backend-engineer-card-payment","title":"Java Backend Engineer (Card Payment)","company":{"id":4510584,"name":"NerdySoft","domain":"nerdysoft.com","url":"https://alion.io/company/nerdysoft","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Ukraine"],"countries":["UA"],"hiring_countries":["UA"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Docker","optional":false},{"name":"Hibernate","optional":false},{"name":"Java","optional":false},{"name":"JUnit","optional":false},{"name":"Mockito","optional":false},{"name":"PCI DSS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"RabbitMQ","optional":false},{"name":"Spring Boot","optional":false},{"name":"Testcontainers","optional":false},{"name":"Kotlin","optional":true},{"name":"Kubernetes","optional":true},{"name":"Scala","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-11-05T11:42:02Z","employer_posted_date":null,"last_verified_at":"2026-11-05T11:42:02Z","board_verified":false,"closed_at":null,"days_open":5,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":5},"description":"About the project\n\nOur client is a fintech company building a new digital banking and payments product from scratch. You will join the team building its card issuing platform (issuer processing): real-time card authorisation, clearing and settlement, and integrations with the card scheme, a banking partner and payment providers.\n\nThe product is at an early stage: architecture, team and roadmap are being shaped now, and the scope will be refined together with the team. You will join a mixed team of client and NerdySoft engineers. AI-assisted development is part of everyday engineering.\n\nWhat you will do\n\nDesign, build and ship Java services of a new card processing platform\n\nImplement card transaction flows: authorisation, reversals, refunds, clearing and settlement - correct and idempotent at money level\n\nBuild reliable integrations with the card scheme, banking partner and payment providers - traceable and easy to reconcile\n\nOwn the technical design of features and components, and contribute to architecture decisions together with the Tech Lead\n\nKeep the bar for quality: code reviews, testing standards, performance, reliability and security (PCI DSS)\n\nWork with AI coding assistants and AI agents in daily development: delegate tasks to agents, review the code they produce and keep it to the team's standards for review and testing\n\nSupport features in production: monitoring, incident analysis, fixes\n\nMentor middle engineers; clarify requirements and discuss technical solutions directly with client stakeholders\n\nWhat you bring\n\n5+ years of commercial backend development with Java (17+) and Spring Boot\n\nCommercial experience in card payments, issuing side preferred: card issuing or issuer processing, acquiring, payment gateways / PSPs or card scheme integrations\n\nProduction experience with high-load, transactional, event-driven systems (Kafka, RabbitMQ, AWS SNS/SQS or similar)\n\nSolid knowledge of concurrency and transactions: ACID, isolation levels, optimistic and pessimistic locking, idempotency\n\nStrong PostgreSQL (or other relational DB) skills: schema design, query optimisation, JPA / Hibernate\n\nIntegrations with external providers: retries, timeouts, reconciliation, consistent error handling\n\nStrong testing culture: unit, integration and contract tests (JUnit, Mockito, Testcontainers)\n\nDocker, CI/CD and hands-on AWS (or another major cloud)\n\nDaily use of AI coding assistants and agents (Claude Code, Cursor, GitHub Copilot or similar): you can show how they speed you up and how you check their output\n\nEnglish B2+ (Upper-Intermediate or higher): you will discuss technical solutions directly with the client\n\nNice to have\n\nIssuer processing: ISO 8583, authorisation, clearing and settlement files, chargebacks\n\nVisa or Mastercard integrations and scheme certification\n\nTokenisation for digital wallets, 3DS\n\nPCI DSS in practice; HSM and key management\n\nLedger systems and double-entry accounting\n\nKotlin or Scala; DDD, Clean or Hexagonal architecture; Kubernetes, Terraform\n\nWhat we offer\n\nComfortable workplace and modern office facilities\n\nFlexible working hours with no overtime and the ability to work remotely\n\n50% compensation for certifications, conferences, training\n\n50% compensation for English courses\n\n18 working days of paid annual leave\n\nPaid sick leave\n\nMedical insurance and sports compensation","description_format":"text","description_chars":3355,"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":["Annual leave","Flexible schedule","Health insurance"],"hiring_locations":[{"name":"Ukraine","iso":"UA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-11-10T21:41:00Z"}],"visa":[],"liveness":{"score":81,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.852,"p_room":0.945,"age_days":5,"expected_fill_days":16,"reasons":["seen:5","win:mid"],"computed_at":"2026-11-11T04:07:32Z"},"pay":null,"html_url":"https://alion.io/job/nerdysoft-java-backend-engineer-card-payment","json_url":"https://alion.io/job/nerdysoft-java-backend-engineer-card-payment.json","meta":{"generated_at":"2026-11-11T04:07:32Z","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":4153,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":4510584},"rest":"https://alion.io/mcp/rest/get_company?id=4510584"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fnerdysoft-java-backend-engineer-card-payment"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fnerdysoft-java-backend-engineer-card-payment"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fnerdysoft-java-backend-engineer-card-payment"},{"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/nerdysoft-java-backend-engineer-card-payment\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fnerdysoft-java-backend-engineer-card-payment"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4039718}},{"tool":"search_jobs","arguments":{"company":"nerdysoft.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4039718},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); 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