Full Stack Developer – Mid-Level/Senior

avacone Switzerland

. Design, develop, and maintain web applications, APIs, and data models in a banking environment.

Posted 11/6/2026full-timeBasel • SwitzerlandSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing, developing, and maintaining secure web applications and APIs in a banking environment, with a strong focus on performance, reliability, and adherence to security practices. Proficient in both frontend and backend development, with the ability to communicate technical decisions effectively to stakeholders.

Highest-signal resume keywords

JavaScript Or TypeScript ProficiencyReact, Angular, Or Vue ExperienceREST API Development With Java, .NET, Node.js, Or PythonSQL And Relational Database KnowledgeCI/CD Workflows And Automated Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Web Application DevelopmentAPI DevelopmentData ModelingAutomated TestingCode ReviewTroubleshootingSecure Development PracticesFeature ImplementationTechnical DesignArchitectural Evaluation

Soft Skills

Clear CommunicationStakeholder CollaborationMentoringRisk ManagementTechnical Decision-Making

Tools & Technologies

GitMonitoring ToolsDebuggersCloud PlatformsContainersInfrastructure As Code

Industry Keywords

BankingFinancial ServicesRegulated IndustryAudit LoggingAccess ControlsChange Management

Tech Stack

Tools & technologies

AngularCloudJavaJavaScriptNode.jsPythonReactSQLTypeScriptVue.js.NET

About the role

Key responsibilities & impact

Design, develop, and maintain web applications, APIs, and data models in a banking environment.
Work with client stakeholders and the delivery team to clarify business requirements, define acceptance criteria, and break work into independently testable and releasable increments.
Write maintainable code and automated tests, review pull requests, and document technical decisions and operational procedures.
Follow the client’s security, data protection, and change management processes throughout development and release.
Support deployments, troubleshoot production issues, and improve application performance and reliability.
Take features from requirements through production while helping ensure applications are secure, reliable, and maintainable.

Requirements

What you’ll need

Professional experience building and maintaining production web applications, with hands-on contributions to frontend and backend development.
Proficiency in JavaScript or TypeScript and experience with a modern frontend framework such as React, Angular, or Vue.
Experience building and integrating REST APIs with a backend technology such as Java, .NET, Node.js, or Python.
Working knowledge of SQL and relational databases, including data modeling and query troubleshooting.
Experience with Git, code reviews, automated testing, and CI/CD workflows.
Ability to diagnose issues across the stack using logs, monitoring tools, and debuggers.
Understanding of secure development practices, including input validation, authentication, authorization, and the handling of sensitive data.
Ability to communicate technical decisions clearly to engineers and business stakeholders.
Mid-level: Experience independently implementing, testing, and releasing well-defined features across the stack.
Mid-level: Ability to clarify requirements, contribute to technical design discussions, and raise risks and dependencies early.
Senior: Experience leading the technical design and delivery of complex features or systems through production rollout.
Senior: Ability to evaluate architectural trade-offs, document decisions, and explain their implications to client stakeholders.
Senior: Experience coordinating technical dependencies across teams and mentoring engineers through design discussions, pairing, or code reviews.
Preferred: Experience in banking, financial services, or another regulated industry.
Preferred: Familiarity with audit logging, access controls, or formal change management processes.
Preferred: Experience integrating applications with enterprise systems or third-party services.
Preferred: Experience with cloud platforms, containers, or infrastructure as code.