Freelance · Remote-first · Aarhus, DK · AI-accelerated

Thomas Borg Salling

Senior Freelance Java Architect & Systems Integrator

// Systems integrated. Value unlocked.

Get in touch View portfolio →

25⁺

Years Java experience

167

GitHub stars (aismessages)

20⁺

Client engagements

Industry domains

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// 01 · About

I integrate & modernize mission-critical Java systems

With 25+ years in software development and architecture — primarily Java and backend — I help organizations connect silos, unlock data flows, and turn fragmented architectures into coherent, high-value platforms.

I combine deep technical expertise with responsible AI-assisted engineering (GitHub Copilot, Claude Code) to accelerate delivery without cutting corners. My M.Sc.E.E. and background in constrained Markov networks mean I understand the technology behind the tools.

All work is reviewed, tested, and production-grade.

Finance

Telecom

Healthcare

Defence

Maritime

M.Sc.E.E.

// 02 · How I work

Hired for expertise, not headcount

I take on focused engagements — not open-ended staff augmentation. Each project has a defined scope, a measurable outcome, and a built-in exit. Here's what that looks like in practice.

Clear scope & outcome

We agree upfront on what success looks like — a delivered system, a migrated platform, a solved integration problem. No open-ended mandates.

Time-limited by design

Every engagement has an end date or a completion milestone. I come in, deliver, and leave your team stronger — not dependent on my continued presence.

Built-in exit strategy

Handover, documentation, and knowledge transfer are part of the deliverable — not an afterthought. Your team owns the outcome when I leave.

Competencies & deliverables

You engage specific expertise to solve a specific problem — Java architecture, systems integration, cloud migration — focused on outcomes rather than presence.

// 04 · Testimonials

Testimonials

Anonymised excerpts · Read all 18 on LinkedIn →

“Thomas possesses a unique combination of maritime domain knowledge and Java expertise. He is self-driven and performed most of the work remotely. Thomas has my highest recommendations and I would hire him again.”

CEO · Maritime Consultancy2015

“A field-proven expert in enterprise web applications and complex Java EE system integrations. A quick learner with exceptional analytical skills who communicates complex matters with ease. An independent contractor by heart — you can rely on him.”

Managing Director · Defence & Maritime2013

“Thomas has a holistic view and still masters the details. Very easy to integrate into a team — he adapts quickly to both processes and culture. I can only give Thomas my warmest recommendation.”

Program Manager · Healthcare IT2020

“Deep knowledge of Java, Spring, Java EE and related technologies, with strong distributed systems design skills. Besides being highly skilled, Thomas is a great teammate — open, soft-spoken and receptive to others' opinions.”

Engineering Manager · Technology2020

“Thomas contributed to developing APIs and services that were decisive for the project’s success. With his analytical approach he delivered high-quality technical solutions and worked proactively for a robust, future-proof architecture. We would gladly invite Thomas back.”

Director · Telecommunications2025

“His technical abilities are absolutely first class, and combined with his excellent ability to communicate and present, his competences and value are complete. I will always recommend Thomas to companies who need a skilled, attentive and highly respected professional.”

Department Director · Finance2010

// 05 · Skills

Deep expertise across the full Java backend stack

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Java & Frameworks

Java SE Java EE Quarkus Spring Boot MicroProfile JPMS Hibernate JPA CDI JTA

APIs & Integration

REST / OpenAPI Apache Camel Messaging NATS ActiveMQ AMQP Keycloak OIDC / JWT

Cloud & Ops

OpenShift Kubernetes Docker Helm Istio AWS Jaeger

Data

PostgreSQL Cassandra Oracle MS SQL Server PostGIS

AI-Assisted Engineering

GitHub Copilot Claude Code AI-assisted refactoring AI-assisted reviews human-in-the-loop

Leadership

Architecture Mentoring Technical review Team lead Code review

Build & Tooling

Maven Gradle Jenkins GitHub Actions SonarQube

// 06 · Contact

Let's work together

Looking for a senior Java architect for a scoped, time-limited engagement with a clear outcome? Let's talk about scope, timeline, and fit.

// Fixed-scope only — not open-ended staff augmentation.