Senior Full-Stack Engineer

SundaySky

. Design and implement end-to-end product capabilities across frontend applications, backend services, APIs, databases, and third-party integrations .

Posted 9/16/2026full-timeRemote • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in full-stack development, particularly with modern JavaScript, TypeScript, and frameworks like React. Proficient in designing scalable APIs, backend services, and integrating with third-party systems while ensuring application security and performance.

Highest-signal resume keywords

Full-Stack DevelopmentReact FrameworkNode.js Backend DevelopmentREST API DesignAutomated Testing Strategies

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaScriptTypeScriptReactNode.jsPythonJavaC#PostgreSQLREST APIsCloud-Native Development

Soft Skills

MentoringCollaborationProblem-SolvingTechnical Guidance

Tools & Technologies

CI/CD PipelinesGitContainersAI-Assisted Engineering ToolsMonitoring Tools

Industry Keywords

SaaS ApplicationsVideo ProcessingDigital Asset ManagementMulti-Tenant EnvironmentsInfrastructure as Code

Tech Stack

Tools & technologies

AWSCloudJavaJavaScriptNode.jsPostgresPythonReactTypeScript

About the role

Key responsibilities & impact

Design and implement end-to-end product capabilities across frontend applications, backend services, APIs, databases, and third-party integrations
Translate product requirements, UX designs, and acceptance criteria into scalable technical solutions
Lead technical design of moderately complex and complex initiatives
Break large capabilities into executable technical components and development increments
Develop responsive, accessible, and maintainable user interfaces
Design and implement backend services, application APIs, business logic, data models, and asynchronous workflows
Build and maintain integrations with enterprise platforms, data sources, AI services, media providers, and third-party systems
Contribute to video creation, rendering, personalization, animation, asset management, analytics, and distribution capabilities
Identify performance, scalability, reliability, security, and maintainability concerns before production issues arise
Write automated unit, integration, component, and end-to-end tests
Participate in code reviews and establish patterns for code quality and engineering consistency
Diagnose and resolve complex production issues across application and infrastructure layers
Improve observability through structured logging, monitoring, metrics, tracing, and actionable alerts
Partner with Product, UX, QA, DevOps, and engineering teams throughout the delivery lifecycle
Mentor mid-level engineers through technical guidance, code reviews, pairing, and feedback
Contribute to architectural standards, engineering practices, shared components, and reusable platform capabilities
Use AI-assisted engineering tools responsibly for development, testing, documentation, troubleshooting, and code modernization
Participate in release readiness, production support, incident response, and root-cause analysis

Requirements

What you’ll need

7+ years of professional software development experience, including substantial experience building production SaaS applications
Strong full-stack development experience with modern JavaScript and TypeScript
Advanced experience with a modern frontend framework, preferably React
Strong knowledge of component architecture, state management, frontend performance, responsive design, and browser behavior
Experience building complex, workflow-oriented web applications
Strong backend development experience using Node.js, Python, Java, C#, or comparable server-side technology
Experience designing and implementing REST APIs, event-driven services, background jobs, and asynchronous workflows
Strong understanding of relational and non-relational data modeling
Experience with PostgreSQL or another modern relational database
Experience integrating with third-party APIs, authentication providers, data platforms, or enterprise systems
Strong understanding of cloud-native application development, preferably within AWS
Experience with containers, CI/CD pipelines, infrastructure environments, and modern deployment practices
Strong understanding of automated testing strategies at unit, integration, API, component, and end-to-end levels
Experience diagnosing distributed application issues using logs, metrics, traces, database analysis, and browser tooling
Working knowledge of application security, authorization, identity, secrets management, data protection, and secure coding practices
Experience with Git-based development workflows, pull requests, code reviews, branching strategies, and automated quality checks
Strong understanding of software design principles, modular architecture, scalability, technical debt management, and maintainability
Preferred: experience with video, audio, media processing, creative tooling, animation, rendering, or digital asset management
Preferred: experience with browser-based motion graphics using React, JavaScript, CSS animations, Canvas, WebGL, or related technologies
Preferred: experience with AI platforms, large language models, retrieval-augmented generation, prompt orchestration, or AI-generated media
Preferred: experience building configurable enterprise platforms with permissions, approval workflows, auditability, and governance controls
Preferred: experience with message queues, event buses, serverless services, or distributed job-processing systems
Preferred: experience with infrastructure as code and production observability platforms
Preferred: experience in a multi-tenant SaaS environment
Preferred: experience improving or modernizing an established software platform while continuing to deliver new product capabilities

Benefits

Comp & perks

Equal-opportunity employer
Inclusive work environment
Diversity celebrated and supported