{"id":197001,"url":"https://alion.io/job/visa-sr-sw-engineer-python-genai-4-years-experience","title":"Sr. SW Engineer (Python, GenAI, 4+ years' experience)","company":{"id":83,"name":"Visa","domain":"visa.com","url":"https://alion.io/company/visa","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":85,"open_postings":136,"ghost_share":0,"stale_share":0.596,"repost_share":0.022,"time_to_fill_p50_days":32,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":22000,"max_usd":51000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":159},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"AI Agents","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"Incident Management","optional":false},{"name":"Kubernetes","optional":false},{"name":"LangChain","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Multi-Agent Systems","optional":false},{"name":"NATS","optional":false},{"name":"PCI DSS","optional":false},{"name":"Prometheus","optional":false},{"name":"Pydantic","optional":false},{"name":"RAG","optional":false},{"name":"Scrum","optional":false},{"name":"SonarQube","optional":false},{"name":"Apache Kafka","optional":true},{"name":"CI/CD","optional":true},{"name":"LangSmith","optional":true},{"name":"LLM","optional":true},{"name":"NLP","optional":true},{"name":"OpenTelemetry","optional":true},{"name":"Prompt Engineering","optional":true},{"name":"Python","optional":true},{"name":"Rest API","optional":true}],"status":"live","first_seen_at":"2026-07-21T00:00:00Z","employer_posted_date":"2026-07-21","last_verified_at":"2026-10-24T04:01:29Z","board_verified":true,"closed_at":null,"days_open":96,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":96},"description":"About Us\nVisa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid.\nAt Visa, you'll have the opportunity to create impact at scale - tackling meaningful challenges, growing your skills and seeing your contributions impact lives around the world.\nJoin Visa and do work that matters - to you, to your community, and to the world. Progress starts with you.\nJob Description\nJob Summary\nSoftware Development Engineers are expert problem-solvers and builders who design, implement, and improve software applications and systems. In this role, engineers spend approximately60-75% of their time coding, working hands-on with code, data, and modern tools (including AI-assisted development, cloud services, and automation frameworks) to deliver secure, scalable, and high-quality technology solutions that drive business outcomes in the fintech sector. They collaborate with cross-functional teams - product managers, designers, data scientists, QA, operations, and compliance - to translate business requirements into robust technical solutions, all while adhering to best practices, security standards, and regulatory requirements.\nAs part of theVisa Access AI platform team, you will be an integral member of a multi-functional development team building and maintaining anAI-powered multi-agent architecture(Visa Assist) that serves Visa's client-facing channels - Chat, Email, and Portal. You will work on intent classification, intelligent routing, and specialized agent workers handling billing inquiries, case management, client profile lookups, and knowledge base retrieval - directly impacting how Visa serves its global client base.\nKey Responsibilities:\nCollaborate with stakeholdersto interpret requirements for Visa Assist project components - spanning inbound channels (Chat, Email, Portal) and agent worker routing logic - and incorporate feedback into future designs or solution fixes.\nTranslate business requirementsby verifying assumptions and escalating potential design issues, including dependencies across MCP servers and external services, to appropriate stakeholders.\nParticipate in system design and architecture, contributing design options for epics related to Intent Classifier enhancements, agent worker capabilities, and NATS messaging patterns, and contributing to design documentation.\nContribute to project estimationand escalate issues that may cause delays in agile/scrum ceremonies.\nDevelop, implement, and maintain codefor microservices within the Visa Assist multi-agent architecture usingPython, FastAPI, LangChain, and NATS messaging, applying coding patterns, guidelines, and best practices.\nImplement and optimize Agent Workers(MsgProcessing, CrmDynamics, InvoiceInvestigator, ClientProfile) using LangChain agents, MCP JSON-RPC 2.0, and RAG pipelines - optimizing for load, performance, fail-over, and recovery (SSE streaming, distributed cache, mTLS, connection pooling).\nApply debugging toolsand implement telemetry, distributed tracing, and monitoring usingOpenTelemetry, Prometheus, and LangSmithto proactively verify assumptions and flag issues before they occur.\nParticipate in code reviewsto ensure coding standards are followed - including Pydantic validation patterns, LangChain agent design, and async FastAPI endpoints - and address routine pull requests with test automation reported in SonarQube.\nCreate test plans and configure testing proceduresto build and unit test Gateway Agent components, Agent Workers, and shared library modules, identifying and resolving defects across multiple features.\nRespond to support requestsby tracking and managing platform uptime and ensuring adherence to incident management process SLAs within the complex multi-agent environment.\nPartner with cybersecurity teamson security assessments and contribute solutions for findings including API Key Auth, mTLS, OAuth2, PCI-DSS log redaction, and input guardrails (CSAM, injection, SSRF, abuse filtering).\nLeverage and build knowledgeof software developer tools - including Docker (multi-stage builds, RHEL 8, non-root) and Kubernetes (health probes, ConfigMaps/Secrets) - to package solutions for automated deployment.\nRemain current in skillsand improve functional knowledge within the team by training junior colleagues on the Visa Assist architecture, NATS pub/sub patterns, and MCP protocol integration.\nKeep peers and leads informedof progress against epics and overall scrum progress for assigned agent workers and gateway components.\nVisa requires at least 3 days in office, expectations of these days will be confirmed by your Hiring Manager.\nQualifications\nBasic Qualifications:\n4 or more years of work experience with a Bachelor's Degree or with an Advanced Degree\nExperience in technologies/software systems or a directly related field (minimum two years).\nExperience in developing and/or implementing web-based or mobile applications (minimum two years).\nExperience in system design and architecture for product components.\nExperience in debugging and troubleshooting software issues.\nExperience in code review and applying coding standards.\nExperience in test planning and execution for software features.\nExperience in responding to support requests and deploying fixes.\nExperience in using software developer tools for code creation and maintenance.\nPreferred Qualifications:\nProgramming Languages:Strong proficiency in Python including async/await patterns, type hints (Pydantic v2), and high-performance serialization (orjson). Experience with FastAPI for building production APIs.\nAI/ML Frameworks:Hands-on experience with LangChain, RAG architectures, LLM API integration, prompt engineering, and agentic AI patterns. Familiarity with intent classification and NLP pipelines.\nProtocols & Integration:Experience with Model Context Protocol (MCP) JSON-RPC 2.0, REST APIs, Server-Sent Events (SSE), and mTLS. Understanding of agent-to-agent communication patterns.\nMessaging Systems:Experience with NATS, Kafka, or similar event-driven messaging systems for distributed microservice communication.\nAPI Development:Ability to design and implement robust APIs using FastAPI, including request validation (Pydantic), authentication (OAuth2, API Key, mTLS), and streaming responses.\nInfrastructure:Experience with Docker (multi-stage builds, security hardening), Kubernetes (container orchestration, health probes, ConfigMaps), and CI/CD pipelines.\nObservability:Practical experience with distributed tracing (OpenTelemetry), metrics collection (Prometheus), and application monitoring. Experience with LLM-specific observability (LangSmith) is a plus.\nSecurity:Understanding of PCI-DSS compliance, input validation/guardrails, log redaction, OAuth2 flows, mTLS certificate management, and secure coding practices.\nSDLC:Strong understanding of the software development lifecycle including test automation (SonarQube), deployment strategies, and release management processes.\nCloud Computing:Experience developing and deploying cloud-native containerized applications.\nGenAI:Practical utilization of Generative AI models for code development and familiarity with LLM API integration patterns (ChatOpenAI, token management, streaming).\nVisa is an EEO Employer\nQualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. 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