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Principal Developer Full Stack

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European Bank for Reconstruction and Development

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Location:
Bulgaria , Sofia

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

This is your chance to lead the charge in building high-impact, enterprise-grade applications that scale - fast. We're looking for a hands-on technical leader who thrives in the full-stack world of Java (Spring Boot) and Angular, and can drive a modern, cloud-native architecture using microservices, containerization, and DevOps automation. From designing robust APIs to embedding AI-assisted development, this role is built for someone who can think strategically and code tactically. You won’t just be building apps , you'll be shaping how custom software is delivered across the organisation. This means championing full continuous delivery in the cloud, driving performance, security, and observability standards, and leading by example in test-driven development and CI/CD best practices. You'll mentor developers, influence architectural direction, and help define a culture of technical excellence that accelerates innovation and scales with the business.

Job Responsibility:

  • Leads the development, enhancement, and maintenance of enterprise-grade full-stack applications using Java (Spring Boot) and Angular within a microservices and micro-frontend architecture
  • Provides technical leadership in designing and implementing scalable, maintainable, and high-performing backend and frontend solutions
  • Ensures best practices in API development, leveraging RESTful services, Open API, and Swagger for documentation
  • Provides technical leadership in implementation of DevOps practices, including Continuous Integration, Continuous Delivery (CI/CD), and infrastructure as code
  • Drives performance optimisation, code refactoring, and the adoption of modern development practices such as asynchronous processing and event-driven architectures
  • Stays up to date with emerging technologies, including AI-assisted development tools and cloud-based AI services, evaluating their relevance for business use cases
  • Collaborates with quality assurance peers and ensures adherence to Quality standards, test automation strategies, and continuous improvement processes on review of quality metrics
  • Champions a shift-left testing approach, ensuring security, performance, and compliance requirements are addressed early in the development lifecycle
  • Implements automated testing frameworks and continuous integration processes to improve software quality and maintainability
  • Fosters a culture of test-driven development (TDD), behaviour-driven development (BDD), and exploratory testing
  • Collaborates with DevSecOps teams to embed security testing and vulnerability assessments, ensuring continuous maintenance of application vulnerability state
  • Champions incident management and observability strategies, ensuring system uptime, scalability, and performance in production
  • Ensures adherence to SLAs, SLOs, and error budgets, aligning operational goals with business requirements
  • Leads post-mortem reviews and continuous improvement initiatives, driving long-term solutions for recurring issues
  • Ensures documentation is comprehensive and up to date, covering architecture, deployment strategies, APIs, and operational procedures
  • Promotes a self-service approach focusing on developer experience and developer productivity
  • Champions the enterprise-wide architecture strategy, ensuring alignment with cloud-native, microservices, and security best practices
  • Leads scalability and reliability improvements, working with cloud platforms such as Azure (AKS, Cosmos DB, Service Bus, Azure SQL)
  • Guides teams in performance tuning, scalability optimisation, and cost-efficiency initiatives for cloud-based infrastructure
  • Engages in proof-of-concept initiatives to evaluate new tools, frameworks, and services, ensuring technical innovation is balanced with business value

Requirements:

  • Educated to degree level in Computer Science, Engineering, or a related field (or equivalent practical experience)
  • Expert-level proficiency in Java (17+) and Spring Boot, including deep architectural knowledge
  • Extensive experience working with a distributed system architecture and design principles
  • Strong experience with containerisation (Docker) and cloud deployments (Azure)
  • Understanding of Kubernetes and its core concepts
  • Experience with the Azure cloud platform, or a comparable cloud environment
  • Experience with enterprise-scale frontend development including JavaScript and Angular
  • Extensive experience designing and implementing relational databases, as well as working with non-relational databases such as MongoDB or Azure Cosmos DB
  • Experience with event-driven architecture and messaging patterns, including queuing and topic-based systems and strong familiarity with the JMS API
  • Deep understanding of performance optimisation and security best practices
  • Extensive experience of the testing pyramid, unit testing, E2E functional testing, and automation strategies
  • Extensive experience of delivery with agile methodologies
  • Exceptional leadership and team management skills
  • Ability to mentor and develop junior and mid-level engineers
  • Strong stakeholder management, collaborating with business and product teams
  • Strong problem-solving abilities with a focus on scalability and maintainability
  • Excellent written and verbal communication skills for both technical and non-technical audiences
  • Ability to champion continuous improvement initiatives across the development teams

Nice to have:

  • Experience with Test-Driven Development (TDD)
  • Experience using Jira for work management and delivery tracking
  • Experience with SaFe-inspired increment planning
  • Ability to define API contracts using the OpenAPI specification
  • Knowledge of micro frontend architecture, module federation and best practices
  • Understanding of GitOps principles and practises
What we offer:
  • Varied, stimulating and engaging work that gives you an opportunity to interact with a wide range of experts in the financial, political, public and private sectors across the regions we invest in
  • A working culture that embraces inclusion and celebrates diversity
  • We offer hybrid and flexible working arrangements and believe we operate at our best when collaborating 3 days a week in person (minimum)
  • An environment that places sustainability, equality and digital transformation at the heart of what we do
  • A workplace that prioritises employee wellbeing and provides a comprehensive suite of competitive benefits

Additional Information:

Job Posted:
December 25, 2025

Expiration:
January 12, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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