Senior Level Application Developer Ii Jobs
Senior level application developer ii jobs place experienced engineers in charge of architectural decisions, complex feature delivery, and the junior developers who depend on their technical direction. Openings are concentrated across on-site, remote, and hybrid settings in Technology & Software, Electronics & Hardware, and Banking & Financial Services, with employers like SMBC, GBIT (Global Bridge InfoTech Inc), and B&A hiring at this level now.
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Senior Application Developer – Custom eCommerce
Location: McKinney, TX – Onsite
Position Type: C2H
Job Overview
We are looking for a Senior Application Developer with strong hands-on experience building custom B2B and B2C eCommerce applications using modern web technologies such as React.js and Next.js. This is a hands-on senior engineering role responsible for designing, developing, integrating, and supporting scalable, high-performance, end-to-end eCommerce solutions. The ideal candidate should have a strong background in custom eCommerce application development, modern frontend architectures, API-driven applications, backend integrations, and cloud platforms. The candidate will work closely with Product, UX, Mobile, Integration, Platform, and other cross-functional teams to transform business requirements into secure, scalable, performant digital experiences.
Key Responsibilities
Custom eCommerce Application Development
- Design, develop, and enhance custom B2B and B2C eCommerce applications.
- Build modern, scalable, high-performance web applications using React.js, Next.js, JavaScript/TypeScript, and related technologies.
- Develop reusable frontend components, application modules, and shared UI capabilities.
- Translate business and functional requirements into technical designs and production-ready implementations.
- Develop end-to-end features across frontend, backend services, APIs, integrations, and cloud environments.
- Troubleshoot, optimize, and enhance existing eCommerce applications.
Frontend Architecture & UI Engineering
- Design and implement modern, modular UI architectures.
- Work with architectural patterns such as:
- Micro-Frontend Architecture
- MicroApps
- Web Components
- Atomic Design
- Server-Driven UI
- Backend-for-Frontend (BFF)
- Build reusable component libraries and scalable design-system capabilities.
- Ensure responsive, accessible, performant, and maintainable user experiences.
API & Integration Development
- Design, develop, and integrate RESTful APIs and/or GraphQL services.
- Build API-driven application architectures supporting eCommerce workflows.
- Integrate frontend applications with backend services, third-party platforms, and enterprise systems.
- Collaborate with integration and platform teams to deliver cohesive end-to-end solutions.
eCommerce Engineering
- Apply strong understanding of core eCommerce concepts and workflows.
- Develop solutions supporting B2B and B2C customer journeys.
- Work across capabilities such as product, catalog, pricing, customer, cart, checkout, order, and related eCommerce functionality.
- Contribute to scalable and composable eCommerce architectures.
Cloud & DevOps
- Develop and deploy applications using cloud platforms such as Azure or AWS.
- Work with CI/CD pipelines and modern DevOps practices.
- Use Git/Bitbucket and established source-control and development workflows.
- Support application deployment, troubleshooting, and production releases.
Performance, Security & Quality
- Identify and resolve application performance issues.
- Apply web application security best practices.
- Conduct code reviews and promote clean, maintainable, and reusable code.
- Develop and maintain appropriate unit/integration testing.
- Ensure solutions meet scalability, reliability, security, and performance requirements.
Collaboration & Technical Leadership
- Collaborate with Product Owners, UX, Mobile, Integration, Platform, and other engineering teams.
- Participate in Agile development processes.
- Mentor junior and mid-level developers.
- Promote engineering best practices, reusable patterns, coding standards, and continuous improvement.
Required Qualifications
- Bachelor's degree in Computer Science, Engineering, or a related field.
- 6+ years of application development experience, preferably with B2B and/or B2C eCommerce platforms.
- Strong hands-on experience building custom eCommerce applications.
- Strong hands-on experience with React.js and Next.js.
- Strong JavaScript/TypeScript development experience.
- Experience designing and developing modular, reusable UI architectures.
- Experience building API-driven applications.
- Hands-on experience developing and integrating RESTful APIs and/or GraphQL.
- Strong understanding of eCommerce concepts, customer journeys, and transactional workflows.
- Experience with Azure and/or AWS.
- Experience with CI/CD, DevOps practices, and Git/Bitbucket.
- Strong understanding of web application security and performance optimization.
- Strong communication, collaboration, troubleshooting, and problem-solving skills.
- Experience working in an Agile environment.
Preferred Qualifications
- Experience with PHP and Adobe Commerce/Magento.
- Experience with micro-frontends, MicroApps, Web Components, design systems, or shared component libraries.
- Experience with composable commerce and MACH architecture.
- Experience with Server-Driven UI and/or Backend-for-Frontend (BFF) architecture.
- Experience with analytics platforms such as Google Analytics or Adobe Analytics.
- Experience with observability and monitoring tools such as New Relic or Azure Monitor.
Senior Application Developer – Custom eCommerce
Location: McKinney, TX – Onsite
Position Type: C2H
Job Overview
We are looking for a Senior Application Developer with strong hands-on experience building custom B2B and B2C eCommerce applications using modern web technologies such as React.js and Next.js. This is a hands-on senior engineering role responsible for designing, developing, integrating, and supporting scalable, high-performance, end-to-end eCommerce solutions. The ideal candidate should have a strong background in custom eCommerce application development, modern frontend architectures, API-driven applications, backend integrations, and cloud platforms. The candidate will work closely with Product, UX, Mobile, Integration, Platform, and other cross-functional teams to transform business requirements into secure, scalable, performant digital experiences.
Key Responsibilities
Custom eCommerce Application Development
- Design, develop, and enhance custom B2B and B2C eCommerce applications.
- Build modern, scalable, high-performance web applications using React.js, Next.js, JavaScript/TypeScript, and related technologies.
- Develop reusable frontend components, application modules, and shared UI capabilities.
- Translate business and functional requirements into technical designs and production-ready implementations.
- Develop end-to-end features across frontend, backend services, APIs, integrations, and cloud environments.
- Troubleshoot, optimize, and enhance existing eCommerce applications.
Frontend Architecture & UI Engineering
- Design and implement modern, modular UI architectures.
- Work with architectural patterns such as:
- Micro-Frontend Architecture
- MicroApps
- Web Components
- Atomic Design
- Server-Driven UI
- Backend-for-Frontend (BFF)
- Build reusable component libraries and scalable design-system capabilities.
- Ensure responsive, accessible, performant, and maintainable user experiences.
API & Integration Development
- Design, develop, and integrate RESTful APIs and/or GraphQL services.
- Build API-driven application architectures supporting eCommerce workflows.
- Integrate frontend applications with backend services, third-party platforms, and enterprise systems.
- Collaborate with integration and platform teams to deliver cohesive end-to-end solutions.
eCommerce Engineering
- Apply strong understanding of core eCommerce concepts and workflows.
- Develop solutions supporting B2B and B2C customer journeys.
- Work across capabilities such as product, catalog, pricing, customer, cart, checkout, order, and related eCommerce functionality.
- Contribute to scalable and composable eCommerce architectures.
Cloud & DevOps
- Develop and deploy applications using cloud platforms such as Azure or AWS.
- Work with CI/CD pipelines and modern DevOps practices.
- Use Git/Bitbucket and established source-control and development workflows.
- Support application deployment, troubleshooting, and production releases.
Performance, Security & Quality
- Identify and resolve application performance issues.
- Apply web application security best practices.
- Conduct code reviews and promote clean, maintainable, and reusable code.
- Develop and maintain appropriate unit/integration testing.
- Ensure solutions meet scalability, reliability, security, and performance requirements.
Collaboration & Technical Leadership
- Collaborate with Product Owners, UX, Mobile, Integration, Platform, and other engineering teams.
- Participate in Agile development processes.
- Mentor junior and mid-level developers.
- Promote engineering best practices, reusable patterns, coding standards, and continuous improvement.
Required Qualifications
- Bachelor's degree in Computer Science, Engineering, or a related field.
- 6+ years of application development experience, preferably with B2B and/or B2C eCommerce platforms.
- Strong hands-on experience building custom eCommerce applications.
- Strong hands-on experience with React.js and Next.js.
- Strong JavaScript/TypeScript development experience.
- Experience designing and developing modular, reusable UI architectures.
- Experience building API-driven applications.
- Hands-on experience developing and integrating RESTful APIs and/or GraphQL.
- Strong understanding of eCommerce concepts, customer journeys, and transactional workflows.
- Experience with Azure and/or AWS.
- Experience with CI/CD, DevOps practices, and Git/Bitbucket.
- Strong understanding of web application security and performance optimization.
- Strong communication, collaboration, troubleshooting, and problem-solving skills.
- Experience working in an Agile environment.
Preferred Qualifications
- Experience with PHP and Adobe Commerce/Magento.
- Experience with micro-frontends, MicroApps, Web Components, design systems, or shared component libraries.
- Experience with composable commerce and MACH architecture.
- Experience with Server-Driven UI and/or Backend-for-Frontend (BFF) architecture.
- Experience with analytics platforms such as Google Analytics or Adobe Analytics.
- Experience with observability and monitoring tools such as New Relic or Azure Monitor.
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Senior Level Application Developer Ii Jobs: Frequently Asked Questions
How do I get a senior level application developer ii job?
Employers at this level want candidates who have owned the full software development lifecycle on complex projects, not just contributed to one. Highlight architectural decisions you drove, performance problems you solved, and developers you mentored. A portfolio that shows progression from execution to ownership, combined with fluency in modern frameworks and DevOps practices, gives you a clear edge over candidates who have the years but not the demonstrated depth.
Which companies hire senior level application developer iis?
Companies hiring senior level application developer iis right now include SMBC, GBIT (Global Bridge InfoTech Inc), and B&A, based on current listings on Migrate Mate as of November 2026. Hiring at this level comes from a broad range of employers, including enterprise technology firms, financial institutions, healthcare systems, and consulting organizations that need engineers who can lead without close supervision.
Are there remote senior level application developer ii jobs?
Yes, remote and hybrid options are well established at this level. About 50% of senior level application developer ii openings are remote or hybrid as of November 2026, reflecting how consistently employers have extended location flexibility to engineers who can operate independently. On-site roles remain common in regulated industries and for positions tied to specific infrastructure or team leadership obligations.
What makes an application developer ii role senior level?
A senior level application developer ii is expected to own outcomes rather than complete tasks. That means making design and architecture calls, setting technical standards for the team, reviewing others' code with authority, and leading delivery across an entire feature or system rather than a single component. The role carries accountability for quality, performance, and the development of less experienced engineers on the same team.
Which industries hire the most senior level application developer iis?
Senior level application developer ii roles concentrate in Technology & Software, Electronics & Hardware, and Banking & Financial Services, based on current listings on Migrate Mate as of November 2026. These sectors drive hiring at this level because they run large, business-critical software systems that require experienced engineers who can own complex codebases, lead modernization efforts, and reduce the risk that comes with high-stakes applications.