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Sr Frontend Developer Jobs in Delaware (NOW HIRING)

Athena LLC

Role Overview The Senior Backend Engineer will be responsible for designing, developing, and ... Work closely with frontend developers, product managers, and other stakeholders to define ...

The Chemours Company

Senior AI Engineer

Wilmington, DE · On-site +1

$101K - $139K/yr

Chemours is seeking a Senior AI Engineer to join our growing AI & Data Science team. This is a ... Minimum 2 years UI & frontend development with React.js, Typescript, and HTML * Strong hands-on ...

LTIMindtree

Java Full Stack Developer

Newark, DE · On-site

$51.50 - $66.50/hr

Charlotte, NC/Newark, DE Seeking a Senior Specialist with 7 to 11 years of experience in Java to ... frontend components using Angular to create seamless user experiences Build and optimize RESTful ...

Hologic

Lead Image Chain Systems Engineer

Newark, DE · On-site

The Lead Image Chain Systems Engineer (Detector Integration) is a senior technical leader ... Lead end-to-end signal-chain development, including analog front-end, digitization, calibration ...

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Sr Frontend Developer information

What is the difference between Sr Frontend Developer vs Frontend Developer?

AspectSr Frontend DeveloperFrontend Developer
Required ExperienceTypically 5+ years, leadership skills1-3 years, entry to mid-level
ResponsibilitiesAdvanced coding, mentoring, project leadershipImplementing UI features, bug fixes
Skills & CertificationsExpertise in JavaScript, frameworks, leadershipHTML, CSS, JavaScript basics
Work EnvironmentSenior roles in teams, project planningDevelopment teams, collaborative projects

The main difference between a Sr Frontend Developer and a Frontend Developer lies in experience, responsibilities, and leadership. Senior developers handle complex tasks, mentor others, and lead projects, while frontend developers focus on implementing features and fixing bugs. Both roles require strong JavaScript, HTML, and CSS skills, but senior roles demand more experience and strategic input.

What are Sr Frontend Developers?

Sr Frontend Developers are experienced software engineers who specialize in building and optimizing the user interfaces of web applications. They are responsible for translating design mockups into interactive, responsive, and accessible web pages using technologies like HTML, CSS, and JavaScript frameworks (such as React, Angular, or Vue). In addition to coding, Sr Frontend Developers often lead technical decisions, mentor junior developers, and collaborate closely with designers and backend engineers to deliver high-quality user experiences. Their expertise ensures that web applications are visually appealing, performant, and user-friendly.

What are some common challenges faced by Sr Frontend Developers when working on cross-functional teams?

Sr Frontend Developers often collaborate closely with backend engineers, UX/UI designers, and product managers. A common challenge in these environments is ensuring clear communication of technical requirements and design expectations to avoid misunderstandings that can lead to rework. Balancing user experience with technical feasibility is another frequent hurdle, especially when negotiating priorities between design vision and performance constraints. Effective Sr Frontend Developers proactively bridge gaps through strong documentation, regular alignment meetings, and by advocating for best practices in both development and design.

What are the key skills and qualifications needed to thrive as a Sr Frontend Developer, and why are they important?

To thrive as a Sr Frontend Developer, you need deep expertise in HTML, CSS, JavaScript, and modern front-end frameworks like React or Angular, usually backed by a degree in computer science or equivalent experience. Advanced knowledge of tools such as Git, Webpack, RESTful APIs, and proficiency with testing frameworks is typically required. Outstanding problem-solving abilities, strong collaboration, and effective communication set top performers apart in this role. These skills ensure the delivery of high-quality, user-friendly interfaces and seamless teamwork in fast-paced development environments.
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What job categories do people searching Sr Frontend Developer jobs in Delaware look for? The top searched job categories for Sr Frontend Developer jobs in Delaware are:
What cities in Delaware are hiring for Sr Frontend Developer jobs? Cities in Delaware with the most Sr Frontend Developer job openings:
Sr Frontend Developer jobs near you
Infographic showing various Sr Frontend Developer job openings in Delaware as of July 2026, with employment types broken down into 100% Full Time. Highlights an 73% In-person, and 27% Remote job distribution.

Senior Backend Engineer - AI Agent

Athena LLC

On-site, Remote

Full-time

Re-posted 23 days ago

Job description

At Athena, we empower possibility through transformative delegation. True leaders reflect on what they want and map the path to get there. We clear the way by pairing exceptional Executive Assistants with our driven clients and ensuring both receive ongoing support throughout the journey. The result is 10x more leverage, more time, and a greater impact on our clients' work and lives.
We are on a mission to build the best delegation platform in the world. We believe that the Human+AI combination will provide a superior experience to delegate complex tasks by combining the strengths of highly trained assistants leveraging highly trained AI agents.
Role Overview
The Senior Backend Engineer will be responsible for designing, developing, and maintaining the backend systems that support our applications and services. This role requires a deep understanding of backend technologies, databases, scalable system architecture, and AI agentic systems. This engineer will play a key role in building Athena's AI agentic systems and the engineering harnesses that support the system development, evaluation, reliability, and continuous improvement. The ideal candidate will have strong problem-solving skills and experience working in a collaborative, agile environment.
Responsibilities
  • Design and Develop Backend Systems: Architect, code, and maintain backend infrastructure using modern technologies and best practices to ensure high performance, security, and scalability.
  • Build AI Agentic Systems and Harnesses: Design and develop backend services, orchestration layers, and supporting engineering harnesses for AI agentic systems, including tooling for evaluation, testing, monitoring, and iterative improvement.
  • Collaborate with Cross-Functional Teams: Work closely with frontend developers, product managers, and other stakeholders to define requirements, design solutions, and deliver high-quality software.
  • Optimize and Improve Existing Systems: Continuously monitor and optimize backend performance. Identify bottlenecks and implement improvements to enhance efficiency, scalability, and the reliability of AI-powered systems.
  • Ensure Code Quality: Write clean, maintainable, and efficient code. Conduct code reviews and provide constructive feedback to peers.
  • Implement Security Best Practices: Ensure backend systems are secure and comply with industry standards and regulations.
  • Mentor Junior Engineers: Provide guidance and mentorship to junior team members to help them grow their technical skills and career.

Qualifications
  • Experience: 5+ years of experience in backend development, with a strong focus on building scalable and robust systems. Proficiency in languages such as Python or Node.js. Experience building AI-powered products, agentic systems, or engineering tooling / harnesses is strongly preferred.
  • Technical Skills: Deep understanding of databases (SQL and NoSQL), RESTful APIs, microservices architecture, and cloud platforms (AWS, Azure, or GCP). Familiarity with LLM-based systems, orchestration frameworks, evaluation pipelines, or related AI infrastructure is a plus.
  • Problem-Solving: Strong analytical and problem-solving skills to identify issues and implement effective solutions.
  • Collaboration: Excellent teamwork and communication skills to work effectively with cross-functional teams.
  • Adaptability: Ability to thrive in a fast-paced, dynamic environment and manage multiple priorities.
  • Education: Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent work experience.

Equal Opportunity Employer: At Athena, we are deeply committed to fostering an inclusive and diverse workplace environment. We believe that diversity enriches our organization, enhances creativity, and drives innovation. We are dedicated to providing equal employment opportunities to all individuals regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or any other characteristic protected by applicable laws. We strive to create an environment where everyone feels valued, respected, and empowered to contribute their unique perspectives and talents. We actively promote diversity and inclusion through our hiring practices, employee development initiatives, and company culture, recognizing that it is essential for our success as a company and as a community.
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