Senior Fullstack Developer

About us At E2E Group, we are building banking products and services within Entra, our banking domain. You will join a newly formed team of experienced, driven colleagues and help shape both the technology we build and the way we work together. We are looking for a Senior Fullstack Developer to help build complete solutions across the frontend and backend of our banking products, both internal and customer-facing. About the role As a Senior Fullstack Developer, you will take business and user needs through to working software, moving between frontend applications, backend services, APIs, and databases. You will work with Vue and TypeScript on the frontend, Go on the backend, and PostgreSQL and NoSQL databases. You will consider how these parts fit together and take responsibility for the complete solution, from requirements and design to testing, deployment, and ongoing maintenance. This is a hands-on role with a high degree of autonomy. You will help shape architecture across the stack, drive technical improvements, and act as a technical reference point for the team. You will work closely with UX, QA, other engineers, product and business stakeholders, and our data and platform teams. You will also help shape how we use AI in software development, from everyday coding assistance to exploring AI-driven workflows for implementing, testing, and maintaining software. Your main responsibilities will include:

• End-to-end development: Deliver complete banking features across frontend and backend, connecting interfaces, APIs, business logic, and data.
• Solution design: Translate business needs into practical solutions. Consider where responsibilities belong across the stack and how design choices affect usability, security, performance, and maintainability.
• Frontend development: Build clear, responsive, and accessible web interfaces using Vue and TypeScript, including loading states, validation, and error handling.
• Backend development: Build and maintain Go services, APIs, integrations, and data models that support the product experience.
• AI-assisted development: Use AI tools to support coding, testing, and refactoring. Contribute to improving AI-driven development workflows, applying engineering judgment and taking ownership of the quality and behaviour of the resulting software.
• Quality and production ownership: Test how the complete solution behaves, support deployment and observability, investigate issues across system boundaries, and improve reliability after release.
• Technical improvements and collaboration: Reduce technical debt, improve shared patterns, and document important decisions. Help the team understand technical options, assumptions, and constraints.
• Mentorship and engineering standards: Support junior and mid-level developers through code reviews, knowledge sharing, and practical guidance across the stack.

Who you are You are a self-motivated, collaborative engineer who enjoys understanding a problem and seeing the solution through to production. You move confidently between frontend and backend work. You can follow a problem from what a user sees through the API and business logic to the underlying data, and you use that understanding to make sound technical decisions. You work independently within a collaborative team, ask useful questions, and involve colleagues when their expertise will improve the outcome. You balance delivery with long-term maintainability and help the team build software that others can understand, extend, and operate. You are curious about how AI can improve engineering work and enjoy experimenting, evaluating the results, and sharing what works with colleagues. Required technical expertise

• Frontend development: Strong experience with TypeScript and modern web applications, including Vue/React, HTML, CSS, and browser behaviour.
• Backend development: Solid experience building backend services and APIs in Go, or other typed languages.
• Databases: Practical experience with MySQL and NoSQL databases, including data modelling, performance and understanding how data access affects application behaviour.
• Architecture across the stack: Experience designing how frontend applications, backend services, APIs, and integrations work together.
• Quality and security: Experience writing testable code and testing complete user flows, with attention to accessibility, performance, validation, and secure handling of data.
• Engineering workflow: Experience with version control, pull requests, code reviews, CI/CD, and maintaining applications in production.

Experience in the european financial sector, working in Go(lang) and developing AI-driven workflows is a strong plus. What we offer You will join E2E Group and work within Entra’s newly formed banking team, with room to influence product solutions, technical decisions, and how we work across stack and tooling. We offer your choice of equipment, hybrid work, regular social activities, a modern office in central Stockholm as well as flexible working hours. Application We review applications on an ongoing basis. We look forward to hearing from you!