{"id":1555490,"url":"https://alion.io/job/apexx-senior-backend-software-engineer-2","title":"Senior Backend Software Engineer","company":{"id":5823,"name":"Apexx","domain":"apexx.global","url":"https://alion.io/company/apexx","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":83,"open_postings":3,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":26,"computed_at":"2026-10-06T05:45:30Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":16500,"max_usd":42000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":133},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon ECS","optional":false},{"name":"Amazon S3","optional":false},{"name":"API Gateway","optional":false},{"name":"AWS","optional":false},{"name":"AWS Lambda","optional":false},{"name":"CI/CD","optional":false},{"name":"GitLab CI","optional":false},{"name":"ISO 27001","optional":false},{"name":"Java","optional":false},{"name":"PCI DSS","optional":false},{"name":"Platform Engineering","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Redis","optional":false},{"name":"SOC 2","optional":false},{"name":"Spring Boot","optional":false},{"name":"SLI/SLO/SLA","optional":true},{"name":"Snowflake","optional":true}],"status":"live","first_seen_at":"2026-10-01T00:49:37Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-06T19:55:32Z","board_verified":true,"closed_at":null,"days_open":5,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":5},"description":"Senior Software Engineer (Backend) - Payment Orchestration & Platform\nLocation: Bengaluru, India (hybrid) | Team: Platform Engineering | Level: Senior, Backend Track\nOVERVIEW\nAPEXX is an independent, enterprise payment orchestration platform. Merchants connect to APEXX once and reach the world's payment ecosystem: acquirers, alternative payment methods (APMs), Buy Now, Pay Later (BNPL) providers and network tokenisation. Our routing engine (AIRE), cascading, Smart Split and Revenue Protect decide in milliseconds where each transaction should go to maximise acceptance and minimise cost. We don't own an acquirer, so our only incentive is the merchant's outcome.\nWe're backed by MMC, Forward Partners, Alliance VC & Finch Capital and growing with enterprise travel and eCommerce merchants including Jet2, TUI, Ryanair, CarTrawler and Hotelbeds.\nWe're looking for a Senior Software Engineer in Bengluru to help build and run the core of that platform.\nThis role covers everything in orchestration - payment flows, routing, connectors, tokenisation, webhooks and reconciliation - and how we run the platform: reliability, on-call, CI/CD and shared engineering practices. We build it, we run it, and done means released, not dev-complete.\nWHAT YOU'LL BE DOING\nOwn core payment flows end to end: authorisation, capture, refund, void and MIT/recurring across card and APM rails, from design doc to production and beyond.\n\nEvolve our routing and recovery logic: rules-based and data-driven routing, decline cascading, Smart Split and outage failover - making sure a retry never becomes a double charge.\n\nBuild and maintain connectors to acquirers, APMs and BNPL providers: normalise responses, handle API version drift and design for partner outages.\n\nDesign for correctness under failure: idempotency, timeouts, ambiguous payment states, asynchronous notifications and webhooks, and reconciliation against settlement files.\n\nProtect cardholder data: work within our tokenisation and vault services, HSM-backed cryptography and PCI DSS, SOC 2 and ISO 27001 controls, keeping PCI scope as small as possible.\n\nRun the platform: join the on-call rotation, define and track SLOs and service dashboards, write runbooks, lead incidents and blameless RCAs, and improve our GitLab CI/CD and AWS estate (ECS, Lambda, API Gateway, S3).\n\nRaise the bar with the team: write technical design docs, give high-quality code reviews, mentor engineers and help us modernise our stack, including our move to Java 17 and newer Spring Boot.\n\nWork across the business with Product, Solutions, Support and our UK colleagues, turning merchant and partner needs into reliable systems.\n\nABOUT YOU\nSignificant experience building and running production backend services in Java and Spring Boot, or a comparable JVM or backend stack and a willingness to move to ours.\n\nA strong grasp of distributed-systems failure modes: retries, idempotency, timeouts, concurrency, eventual consistency, and how to reason about \"we don't know if it happened\".\n\nSolid PostgreSQL skills (schema design, transactions and isolation, query tuning) and practical use of Redis or similar caches.\n\nHands-on AWS experience and comfort with CI/CD, containers and infrastructure-as-code.\n\nYou've owned services in production: on-call, debugging with logs, metrics and traces, leading incidents and writing up what the team learned.\n\nClear written communication: design docs, runbooks, RCAs and merge request descriptions that others can act on.\n\nYou use AI coding tools productively and critically: you know when to trust the output, and you verify it with tests and review before it ships.\n\nYou help the people around you get better through review, pairing and mentoring.\n\nNICE TO HAVE\nPayments experience: card acquiring, 3DS2/SCA, network tokens, APMs/BNPL, settlement and reconciliation, or payment orchestration.\n\nWorking knowledge of PCI DSS, HSMs and key management, or OAuth2/mTLS for partner integrations.\n\nObservability tooling, SLO-based alerting, or analytics stacks such as Snowflake or QuickSight.\n\nExperience in a Scale-up or Fintech working with UK or global teams.\n\nHOW WE HIRE\nFour conversations:\na talent screen,\n\na conversation with the hiring manager,\n\na hands-on technical session and\n\na system design session.\n\nBefore your first interview, we'll send you a short guide on how to prepare for each round. You're welcome to use your own AI tools in both technical rounds - we're interested in how you think, verify and decide. Once a decision is made, every candidate receives a written feed-forward from the panel. Tell us about any adjustments you need and we'll make them.\nCOMPENSATION & BENEFITS\nCompetitive compensation that recognises your skills, experience and impact.\n\nGenerous time off: annual leave, public holidays and wellbeing-focused time away from work.\n\nWork From Anywhere: up to 90 days a year from eligible locations, subject to our policy.\n\nComprehensive health insurance for you and your loved ones.\n\nPersonal accident insurance for when it's needed most.\n\nEnhanced family leave: enhanced parental and family-friendly leave policies.\n\nLearning & growth: opportunities to learn, grow and build a meaningful career at APEXX.\n\nWHO WE ARE & WHERE WE ARE\nAPEXX is a global payment orchestration platform with teams in the UK and India. For more than a decade we've helped enterprise businesses simplify payments through a single, scalable integration, with access to 200+ acquirers,150+ alternative payment methods and 10+ BNPL providers. We're trusted by leading global brands including Ryanair, TUI, Hotelbeds, CarTrawler, Avon and Jet2.\nAPEXX is an equal opportunities employer committed to equality, diversity and inclusion.\nWe do not accept speculative CVs or candidate profiles from recruitment agencies.","description_format":"text","description_chars":5791,"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","Health insurance","Parental leave"],"hiring_locations":[{"name":"India","iso":"IN","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Payment Processing & Gateways"],"lifecycle":[{"event":"open","at":"2026-10-01T01:50:19Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":5,"expected_fill_days":26,"reasons":["conf:1","velocity","win:early"],"computed_at":"2026-10-06T05:45:30Z"},"pay":null,"html_url":"https://alion.io/job/apexx-senior-backend-software-engineer-2","json_url":"https://alion.io/job/apexx-senior-backend-software-engineer-2.json","meta":{"generated_at":"2026-10-06T22:20:03Z","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","counted_by":"address","units_charged":1,"used_today":2630,"day_limit":5000,"remaining_today":2370,"minute_limit":60,"resets_at":"2026-10-07T00:00:00Z"}},"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":5823},"rest":"https://alion.io/mcp/rest/get_company?id=5823"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fapexx-senior-backend-software-engineer-2"},{"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%2Fapexx-senior-backend-software-engineer-2"},{"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%2Fapexx-senior-backend-software-engineer-2"},{"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/apexx-senior-backend-software-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fapexx-senior-backend-software-engineer-2"}]}