Java Full Stack Developer Intern Jobs in Nashua, NH

Leader Bank is looking for exceptionally dedicated team members to join one of the region’s fastest growing community banks and mortgage lenders. At the time of its founding in 2002, Leader Bank had one branch office, $6.5 million in assets and 7 team members. Since then, the Bank has become one of the most successful banks in Massachusetts with more than $5 billion in assets, 450+ team members, 7 branch offices, and annual mortgage originations of over $2 billion.

Exemplary products and an innovative spirit have driven Leader Bank’s rapid growth over the years, and our team members embrace these values. Our mission is to obsess over our clients, make them feel valued, and maintain long-term relationships with them by constantly enhancing our products and processes to always improve our client experience. For our team members, Leader Bank prioritizes competitive compensation and benefits, a healthy work-life balance, and an environment that fosters diversity and inclusion.

Summary
We are seeking a highly motivated and versatile Senior Full Stack Developer who combines strong technical expertise with curiosity, collaboration, ownership, and a passion for delivering high-quality software solutions. This role is ideal for an experienced engineer who thrives in a fast-paced environment, embraces continuous learning, and can translate business needs into scalable, maintainable technology solutions that support the Bank’s continued digital transformation.

The successful candidate will design, develop, and support modern applications using technologies such as Vue.js, JavaScript, Python, RESTful APIs, relational databases, and AWS cloud services. In addition to core full-stack development responsibilities, the role requires a practical understanding of AI-enabled software development, workflow automation, low-code/no-code platforms, API-led integration, and modern digital solution architecture.
This position offers the opportunity to work on impactful initiatives that accelerate digital transformation while expanding expertise in modern application development, cloud technologies, automation, and AI-driven solutions.

Responsibilities

• Develop, test, deploy, document, and support modern web applications, internal business tools, integrations, APIs, and automation solutions. 
• Build responsive, intuitive, and user-friendly applications using Vue.js, PHP, JavaScrip, HTML, CSS, and modern front-end frameworks. 
• Design, build, and maintain Retool applications to rapidly deliver internal operational tools, workflow solutions, dashboards, and business process automation. 
• Develop, consume, secure, and support RESTful APIs and event-driven integrations across internal and third-party systems. 
• Design and implement enterprise integrations using Boomi, MuleSoft, or comparable iPaaS platforms, including API-led connectivity, workflow orchestration, and reusable integration services. 
• Collaborate with business stakeholders to identify opportunities for process optimization through automation, low-code/no-code solutions, and API-enabled services. 
• Work with AWS cloud services to deploy, monitor, secure, and maintain applications and integration workloads. 
• Partner closely with product managers, business analysts, QA engineers, infrastructure teams, security stakeholders, and other developers to deliver business value. 
• Participate actively in Agile ceremonies, sprint planning, backlog refinement, solution design discussions, demos, retrospectives, and peer code reviews. 
• Troubleshoot and resolve application, integration, and production issues with a strong sense of ownership and urgency. 
• Ensure solutions meet expectations for security, scalability, reliability, performance, governance, and maintainability. 
• Evaluate and leverage emerging technologies, including AI-assisted development tools, workflow automation platforms, and intelligent business solutions, to improve engineering productivity and business outcomes. 
• Mentor junior developers, promote engineering best practices, and contribute to a culture of continuous learning, knowledge sharing, and technical excellence. 
• Demonstrate accountability, collaboration, and a commitment to delivering innovative technology solutions that support Leader Bank's clients, employees, and strategic business objectives.

Qualifications 

• Bachelor’s degree in Computer Science, Engineering, Information Systems, a related discipline, or equivalent professional experience. 
• 4+ years of professional software development experience delivering enterprise-grade applications across the full technology stack. 
• Strong experience designing, developing, and maintaining scalable web applications using modern technologies such as JavaScript, TypeScript, Vue.js, React, Python, PHP, or equivalent frameworks and languages. 
• Proven experience designing, developing, securing, and integrating RESTful APIs and microservices-based architectures. 
• Strong proficiency with relational databases, including PostgreSQL, MySQL, or MariaDB, with experience in data modeling, query optimization, and performance tuning. 
• Deep understanding of Git-based source control, branching strategies, code review processes, automated testing, and CI/CD pipelines. 
• Experience building and deploying cloud-native applications using AWS services such as Lambda, S3, RDS, CloudWatch, Bedrock, API Gateway, ECS, or comparable cloud platforms.
• Solid understanding of software architecture principles, application security, scalability, resiliency, and observability best practices. 
• Experience working within Agile/Scrum teams and contributing to technical planning, estimation, and solution design. 
• Hands-on experience leveraging AI and Large Language Models (LLMs) to improve developer productivity, automate workflows, enhance business processes, and develop intelligent software solutions. 
• Strong troubleshooting, analytical, and problem-solving skills with the ability to independently diagnose complex technical issues and deliver effective solutions.
• Excellent written and verbal communication skills with the ability to collaborate effectively across engineering, product, operations, and business teams. 
• Demonstrated ability to mentor junior developers, promote engineering best practices, and contribute to a culture of continuous learning and technical excellence. 
• Ability to balance innovation with risk management and compliance requirements within a regulated financial services environment. 
• Passion for learning emerging technologies and evaluating their practical application to business and customer outcomes.

Technical Skillset Preferred

Area

Examples

Front End

Retool, Vue.js, JavaScript, React, HTML, CSS

Back End

Python, PHP, RESTful APIs, Boomi/MuleSoft

Data

PostgreSQL, MySQL, MariaDB, SQL fundamentals

Cloud and DevOps

AWS S3, RDS, Lambda, CloudWatch, Git, CI/CD concepts

AI and Automation

AWS Bedrock, AI-assisted development, LLM concepts, workflow automation

Leader Bank offers an excellent compensation and benefits package including 401k plan with corporate match, medical and dental insurance, and the opportunity to work for a fast growing, local organization.

Leader Bank, N.A. is an Equal Opportunity and Affirmative Action employer and does not discriminate on the basis of race, color, religion, age, gender, marital status, sexual orientation, national origin, disability, military status, veteran status, or any other protected class.
The base salary range below represents the low and high end of the Leader Bank salary range for this position. Actual salaries will vary and may be above or below the range based on various factors including but not limited to location, experience, and performance.

Salary Minimum: $85,000.00 - Salary Max: $110,000.00

The range listed is just one component of Leader Bank’s total compensation package for team members. Other rewards may include annual bonuses, commissions, short- and long-term incentives, and program-specific awards. In addition, Leader Bank provides a variety of benefits to eligible team members, including health insurance coverage, a team member wellness program, life and disability insurance, a retirement savings plan, paid holidays and paid time off and vacation.

Leader Bank, N.A. is an Equal Opportunity and Affirmative Action employer and does not discriminate on the basis of race, color, religion, age, gender, marital status, sexual orientation, national origin, disability, military status, veteran status or any other protected class.
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