{"id":4206895,"url":"https://alion.io/job/wex-software-development-engineer-3-6","title":"Software Development Engineer 3","company":{"id":2019,"name":"WEX","domain":"wexinc.com","url":"https://alion.io/company/wex","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":100,"open_postings":18,"ghost_share":0,"stale_share":0.167,"repost_share":0.056,"time_to_fill_p50_days":18,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":121500,"max":145500,"currency":"USD","period":"year","gross":null,"usd_annual":145500},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"gRPC","optional":false},{"name":"Java","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"AI Agents","optional":true},{"name":"Apache Kafka","optional":true},{"name":"Docker","optional":true},{"name":"Kubernetes","optional":true},{"name":"Milvus","optional":true},{"name":"Multi-Agent Systems","optional":true},{"name":"OpenSearch","optional":true},{"name":"PCI DSS","optional":true},{"name":"Pinecone","optional":true},{"name":"Weaviate","optional":true}],"status":"live","first_seen_at":"2026-11-12T23:54:08Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-12T23:54:08Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"This is a remote position; however, the candidate must reside within 30 miles of one of the following locations: Boston, MA; San Francisco Bay Area, CA; Dallas, TX; Salt Lake City, UT; Seattle, WA; and Portland, ME\nAbout the Team/Role\nWe are seeking a seasoned Sr. Software Engineer in the WEX Mobility Engineering organization. This role will sit in the Merchant team within the North America Mobility that caters fleet management and mobility payments solutions to our large customers and partners in the North America region. The Merchant development team spans the USA and Brazil. WEX Merchant products enable discount and rebate programs, secure merchant onboarding, offer management, and transaction and pricing transparency for merchants and partners. At WEX, we deliver reliable, secure, and PCI-compliant services that process high volumes of transactions with strict availability, auditability, and reliability requirements.\nHow you’ll make an impact:\nDesign, develop, and maintain robust, scalable, and high-performance object oriented code in our backend services.\nDevelop public REST APIs using Java and internal gRPC APIs for inter-service and inter-system communication.\nCraft systems designs, lead design decisions, and drive alignment with other senior engineers.\nWrite automated unit tests, integration tests, end-to-end tests, concurrency tests, load/performance tests. \nAnalyze existing systems to identify bottlenecks, tech debt, and implement scalability, and stability improvements.\nImplement automation for testing, monitoring, healing, and scaling applications, continuous integration and deployment to reduce time to market.\nCollaborate with cross-functional teams, including product managers, designers, and other engineers, to define and implement new features.\nConduct code reviews (comment, approve, seek revisions, merge), mentor junior and mid-level engineers, and actively promote engineering best practices.\nDive deep and troubleshoot complex issues, devise fixes, author root cause analysis documents, and ensure lasting performance and reliability.\nConduct objective and comparative analyses of competing technologies to advise the team of pros and cons of a technology solution.\nMaintain robust documentation (design docs, run books, change management docs, and readiness plans).\nProvide live-site support for production applications by monitoring systems, ensuring rapid incident resolution, and driving continuous improvement.\nDrive cross-team projects as a single-threaded-owner (STO) or tech lead, and actively unblock other engineers to make progress.\nExperience you'll bring:\nBachelor’s degree in Computer Science or Software Engineering.\nSenior experience in software engineering.\nStrong understanding of data structures and algorithms, object-oriented design, and problem-solving skills.\nExpertise in designing and developing internet-scale services with scalability, availability, security, and reliability design tenets.\nExcellent written and verbal communication skills, and a collaborative and empathetic mindset.\nProficiency in backend development, with proficiency expertise in Java or C#, and frameworks like SpringBoot, building and optimizing RESTful APIs, ODATA framework, and SQL.\nAbility to leverage AI-enabled development tools such as Cursor AI, Kiro and GitHub Copilot to accelerate feature delivery, automate documentation, and enhance code quality.\nFluent English. \nPreferred Qualifications\nMaster’s degree in computer science or software engineering.\nExperience with event-driven architecture and tools like Kafka.\nExperience working on card payments.\nFamiliarity with cloud-native architecture (containerization using tools such as Docker and Kubernetes).\nAwareness of API security and PCI DSS compliance requirements.\nFamiliarity with mobile development (iOS or Android).\nExperience building AI skills & deploying AI solutions to production environments.\nExperience building production-grade AI agents or copilots.\nFamiliarity with multi-agent systems and distributed AI architectures.\nExperience with vector databases (e.g., Pinecone, Weaviate, OpenSearch, Milvus).\nKnowledge of AI evaluation techniques, safety practices, and responsible AI principles.\nThe base pay range represents the anticipated low and high end of the pay range for this position. Actual pay rates will vary and will be based on various factors, such as your qualifications, skills, competencies, and proficiency for the role. Base pay is one component of WEX's total compensation package. Most sales positions are eligible for commission under the terms of an applicable plan. Non-sales roles are typically eligible for a quarterly or annual bonus based on their role and applicable plan. WEX's comprehensive and market competitive benefits are designed to support your personal and professional well-being. Benefits include health, dental and vision insurances, retirement savings plan, paid time off, health savings account, flexible spending accounts, life insurance, disability insurance, tuition reimbursement, and more. For more information, check out the \"About Us\" section.Pay Range: $121,500.00 - $145,500.00","description_format":"text","description_chars":5156,"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":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Life insurance","Retirement plans","Vision insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"Texas","iso":null,"kind":"city"},{"name":"Utah","iso":null,"kind":"city"},{"name":"Massachusetts","iso":null,"kind":"city"},{"name":"Maine","iso":null,"kind":"city"},{"name":"Washington","iso":null,"kind":"city"},{"name":"California","iso":null,"kind":"city"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Fleet Management","Cards & Card Issuing","Payment Processing & Gateways"],"lifecycle":[{"event":"open","at":"2026-11-12T23:54:08Z"}],"visa":[{"country":"US","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"H-1B filings in 12 months: 11","filings_12m":11,"filings_prev_12m":14,"green_card_filings_12m":0,"median_offered_wage_usd":157500,"route":null,"cap_exempt":false,"checked_at":"2026-11-12T07:36:15+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":5}],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":18,"reasons":["conf:1","win:early"],"computed_at":"2026-11-13T01:11:24Z"},"pay":{"stated_usd_annual":145500,"is_top_pay":false},"html_url":"https://alion.io/job/wex-software-development-engineer-3-6","json_url":"https://alion.io/job/wex-software-development-engineer-3-6.json","meta":{"generated_at":"2026-11-13T01:11:24Z","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":2635,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-14T00:00:00Z"}},"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":2019},"rest":"https://alion.io/mcp/rest/get_company?id=2019"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fwex-software-development-engineer-3-6"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Fwex-software-development-engineer-3-6"},{"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%2Fwex-software-development-engineer-3-6"},{"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/wex-software-development-engineer-3-6\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fwex-software-development-engineer-3-6"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4206895}},{"tool":"search_jobs","arguments":{"company":"wexinc.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4206895},"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); https://alion.io/mcp with an Alion account has everything. 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