{"id":3605562,"url":"https://alion.io/job/webcreek-senior-software-developer-mass-messaging-notifications","title":"Senior Software Developer – Mass Messaging & Notifications","company":{"id":4445716,"name":"WebCreek","domain":"webcreek.com","url":"https://alion.io/company/webcreek-2","size_band":null,"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":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"inferred_payroll_markers","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["AR","BR","CO","MX","AI","AG","AW","BS","BB","BZ","BM","BO","BQ","KY","CL","CR","CU","DM","DO","EC","SV","FK","GE","GD","GT","GY","HT","HN","JM","MS","NI","PA","PY","PE","PR","KN","LC","VC","SR","TT"],"hiring_countries_total":43,"salary":null,"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Azure","optional":false},{"name":"Docker","optional":false},{"name":"Firebase","optional":false},{"name":"GitHub Actions","optional":false},{"name":"GraphQL","optional":false},{"name":"Helm","optional":false},{"name":"Kubernetes","optional":false},{"name":"MQTT","optional":false},{"name":"MySQL","optional":false},{"name":"Node JS","optional":false},{"name":"Push Notifications","optional":false},{"name":"React.js","optional":false},{"name":"Redis","optional":false},{"name":"Twilio","optional":false},{"name":"TypeScript","optional":false},{"name":"Vue.js","optional":false},{"name":"Claude Code","optional":true},{"name":"Git","optional":true},{"name":"JavaScript","optional":true},{"name":"Linux","optional":true},{"name":"WebSockets","optional":true}],"status":"live","first_seen_at":"2026-11-01T11:31:20Z","employer_posted_date":null,"last_verified_at":"2026-11-01T11:31:20Z","board_verified":false,"closed_at":null,"days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"WebCreek is looking for a Senior Software Developer with strong experience developing scalable messaging and notification systems to support a mission-critical emergency communication platform.\nThe ideal candidate has hands-on experience building and maintaining production messaging solutions that deliver notifications across multiple channels, including SMS, email, voice, and mobile push. This role requires expertise in reliable message delivery, third-party messaging integrations, asynchronous processing, and high-volume notification systems.\nThis position is well suited for a senior full-stack developer who enjoys solving complex distributed systems challenges, takes ownership of features from design through production, and can build reliable communication solutions that perform consistently under demanding conditions.\nWhat You'll Do:\nDesign, develop, and maintain multi-channel messaging capabilities for delivering emergency notifications through SMS, email, voice, and mobile push.\n\nBuild and maintain integrations with messaging providers such as Twilio, SendGrid, Azure Communication Services, or similar platforms.\n\nDevelop scalable messaging architectures using queues, background workers, asynchronous processing, and message-driven systems.\n\nImplement reliable delivery mechanisms, including retries with exponential backoff, idempotency, deduplication, provider failover, and delivery status tracking.\n\nOptimize messaging workflows to support high-volume notifications reaching thousands of recipients.\n\nImplement and manage delivery receipts, provider webhooks, and notification tracking processes.\n\nSupport SMS compliance requirements, including opt-in/opt-out management, 10DLC, and toll-free registration.\n\nImplement email authentication and deliverability practices, including SPF, DKIM, DMARC, bounce handling, and related monitoring.\n\nDevelop mobile push notification capabilities using Firebase Cloud Messaging (FCM) and Apple Push Notification service (APNs).\n\nDesign data models and workflows for recipient audiences, groups, multilingual message templates, and notification delivery tracking.\n\nDevelop and maintain backend services using Node.js, GraphQL, MySQL, Redis, and publish/subscribe technologies such as MQTT.\n\nContribute to frontend development using Vue 3 or React to support notification management and operator-facing interfaces.\n\nIntegrate with third-party mass-notification systems and support directory and roster synchronization.\n\nDeploy, maintain, and troubleshoot containerized applications using Docker, Kubernetes, and Helm.\n\nWrite automated unit and end-to-end tests, maintain CI workflows using GitHub Actions, and participate in code reviews.\n\nUse AI coding agents to support development productivity while reviewing and validating generated code.\n\nCollaborate with Engineering and product stakeholders to define technical solutions and deliver reliable, maintainable production features.\n\nWhat You Bring:\n7+ years of professional software development experience, including experience delivering and supporting at least one production software product.\n\nStrong hands-on experience building and operating production messaging, notification, or alerting systems at scale.\n\nExperience integrating messaging platforms such as Twilio, SendGrid, Azure Communication Services, or similar providers.\n\nStrong understanding of reliable message delivery patterns, including queues, workers, retries, idempotency, deduplication, provider failover, and throughput optimization.\n\nExperience developing notification systems capable of delivering messages to thousands of recipients.\n\nKnowledge of SMS compliance requirements, including opt-in/opt-out processes, 10DLC, and toll-free registration.\n\nUnderstanding of email deliverability, including SPF, DKIM, DMARC, bounce handling, and delivery monitoring.\n\nExperience implementing mobile push notifications using Firebase Cloud Messaging (FCM) and Apple Push Notification service (APNs).\n\nExperience designing data models for audiences, recipient groups, multilingual templates, and delivery tracking.\n\nStrong backend development experience with Node.js and GraphQL APIs; TypeScript is a plus.\n\nWorking proficiency with Vue 3 or React.\n\nExperience with MySQL, Redis, and message-driven or publish/subscribe systems such as MQTT.\n\nExperience with Docker, Kubernetes, Helm, and troubleshooting services in containerized environments.\n\nStrong Linux and networking fundamentals, including TCP/UDP, TLS, WebSockets, and packet capture analysis.\n\nExperience writing automated unit and end-to-end tests and working with GitHub Actions, Git, and pull-request workflows.\n\nExperience using AI coding agents, such as Claude Code, as part of daily development work, with the ability to review and correct generated code.\n\nStrong problem-solving skills, technical ownership, and the ability to independently deliver solutions from design through production.\n\nProfessional proficiency in spoken and written English.\n\nWhat You'll Gain:\nA full-time, fully remote position with a growing international company.\n\nThe opportunity to work on a mission-critical communication platform with real-world applications.\n\nHands-on experience developing scalable real-time audio and networked communication solutions.\n\nOpportunities to collaborate with experienced engineers on complex software, networking, and embedded systems challenges.\n\nA collaborative remote working environment with an international engineering team.\n\nLocation: Remote LatAm\nWebCreek is an equal opportunity employer. We believe our strength comes from our people and welcome all qualified applicants regardless of race, religion, color, gender, age, or disability. If you have the skills and the passion for tech, we want you on our team.\nFor more information, please visit:\nOriginally posted on Himalayas","description_format":"text","description_chars":5848,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Argentina","iso":"AR","kind":"country"},{"name":"Brazil","iso":"BR","kind":"country"},{"name":"Colombia","iso":"CO","kind":"country"},{"name":"Mexico","iso":"MX","kind":"country"},{"name":"Anguilla","iso":"AI","kind":"country"},{"name":"Antigua and 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