Senior Java / Angular Developers (Expert), Brussels

Mission Overview Keystone Solutions is recruiting an Expert Business Developer / Strategist to join a consultancy mission with our client, a major public-sector administration in Brussels. The engagement is part of a large-scale modernization initiative transforming a legacy monolithic application into a modern, API‑first and event‑driven microservices architecture running on Kubernetes. Beyond technical modernization, this is also a business transformation program: it enables the development of new features, improves agility, and accelerates the delivery of value to internal and external end users. By building a more flexible and scalable digital platform, the program supports better services, an enhanced user experience, and faster adaptation to evolving business and regulatory needs. As a Keystone Solutions consultant, you will carry out the responsibilities below in close collaboration with the client's teams.

Consultancy at Keystone Solutions

You will operate on site at the client's location as a Keystone Solutions consultant, embedding with client stakeholders (business leads, product owners, architects, and engineering squads) to co‑create outcomes while representing Keystone's standards and values.

You will tackle diverse challenges across modern API‑first and event‑driven domains, microservices design, legacy‑to‑modern transitions, DevOps enablement, and observability—building a portfolio of achievements that spans multiple client engagements over time.

Keystone Solutions invests in your growth through coaching, expert communities of practice, certifications, and curated learning paths so you can broaden and deepen your skills across strategy, delivery, and technology.

Varied client contexts accelerate your progression, with clear pathways to lead consultant, solution architect, and engagement leadership roles while staying hands‑on with impactful transformation work.

Role Expert Business Developer / Strategist— Most recent experience: Any time

Key Responsibilities

Partner with business and IT stakeholders to shape and refine the modernization roadmap, aligning business capabilities to an API‑first and event‑driven microservices architecture.

Elicit, analyze, and challenge requirements; translate them into clear domain boundaries, event models, and API specifications that guide delivery squads.

Bridge strategy and execution by coordinating closely with product owners, architects, developers, and DevOps engineers to ensure incremental value delivery and measurable outcomes.

Support the progressive replacement of legacy components, ensuring continuity of service, data integrity, and controlled risk during migration.

Champion engineering excellence across topics such as version control, CI/CD, observability, and quality practices, leveraging tools like GIT, ELK tools, and the Atlassian suite.

Communicate effectively across business and technical audiences, facilitating decision‑making and transferring knowledge to uplift client teams' competencies.

Contribute to compliance, security, and operational readiness in a public‑sector context, aligning with regulatory requirements while improving user experience.

Operate as a Keystone Solutions consultant, bringing our values and consulting rigor to every interaction while delivering the client's objectives.

Skills

Angular - Level: Expert

API design - Level: Expert

Atlassian suite - Level: Expert

Communiquer et transmettre des connaissances - Level: Expert

DB2 - Level: Expert

DevOps - Level: Expert

ELK tools - Level: Expert

GIT - Level: Expert

IntelliJ - Level: Expert

Java - Level: Expert

Linux - Level: Expert

NetBeans - Level: Expert

SCRUM - Level: Expert

Spring Boot - Level: Expert

Visual Studio - Level: Expert

WebLogic - Level: Expert

Windows - Level: Expert

Languages

Dutch or French - Level: Nice to have

English - Level: Active knowledge

Location

Main address: Brussels

Keystone Solutions' Values in a Consultancy Context

Client impact first: We focus relentlessly on outcomes that matter for users and the organization.

Pragmatic excellence: We balance architectural vision with delivery pragmatism to ship value early and often.

Ownership and transparency: We act as accountable partners, communicating clearly and earning trust at every step.

Learning mindset: We continuously learn, share, and elevate client teams—being a K‑Stone means bringing these values to every project.

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