Senior Software Engineer (Integrations)

We're looking for you if:

• Master of various integration styles: from REST/Webhooks and custom APIs to ETL pipelines, batch processing, raw file exchanges, and handling massive data volumes.
• Languages are tools to you: Strong in Java (Spring), comfortable finding your feet in TypeScript/Node and C# (for existing/legacy modules of the platform stack).
• You think in frameworks: You naturally spot repeatable integration patterns and build abstractions, or internal developer tools instead of copy-pasting your tenth API adapter.
• You know event-driven systems: Hands-on experience with Kafka (or similar messaging) and comfort handling asynchronous, high-throughput, and distributed data streams.
• You are AI-fluent: You actively use AI tooling in your daily workflow to navigate complex codebases faster, streamline refactoring, and reduce boilerplate.
• You are open-minded & pragmatic: You tackle legacy code or complex third-party APIs with curiosity and common sense—focusing on data integrity, uptime, and shipping value.

Bonus points

• Transport, logistics, or telematics domain experience.
• AWS or GCP cloud exposure.
• Prior experience building internal developer tools, SDKs, or integration frameworks.

Senior Integrations Engineer

Various integration styles · Build the frameworks · Scale to thousands of feeds

At CO3, we are standing up a new team to take technical ownership of a live logistics platform integrated into our ecosystem.
The platform lives and dies by integrations: connecting a hyper-fragmented market of heavy fleets, logistics providers, and telematics systems into one unified, real-time data stream.

We’re looking for a Senior Integrations Engineer who doesn't just wire up one more API — but deeply understands existing integration flows, maintains system stability, and builds the scalable frameworks to unify and modernize our entire integration pipeline.

Why this role?

• Real Platform Evolution: Take ownership of a live production platform—understanding its current integration layer, maintaining production reliability, and modernizing the stack into CO3’s core architecture.
• Genuine Ownership: Integrations, cloud infrastructure, engineering standards, and the unification strategy are yours to participate in and execute.
• Scale & Ecosystem Variety: Hundreds of active integrations across the logistics ecosystem, handling high throughput and complex data feeds.
• Build Frameworks, Not Just Plugs: Build and extend the internal abstractions, tooling, and developer frameworks that make every future integration faster, safer, and easier to maintain.

Your mission

• Deconstruct & Maintain: Deeply analyze existing integration pipelines and telematics feeds, keeping them stable, reliable, and performant in production.
• Tackle Multiple Integrations: Work across diverse integration styles (REST, streaming/Kafka, webhooks, batch, message queues, vendor protocols) and keep high data quality.
• Build Tooling & Frameworks: Design reusable frameworks and internal developer tooling so the team can scale to thousands of feeds without increasing operational overhead.
• Design for Scale & Resilience: Build for high throughput, back-pressure handling, retries, and data integrity across distributed data streams.
• Modernize & Unify: Step-by-step refactor and transition legacy integration flows into CO3's unified, event-driven platform architecture.
• Work AI-Native: Utilize modern AI tooling to rapidly navigate existing integration codebases, streamline refactoring, and raise development velocity.

What's in it for you

• • High-Impact Leverage: Build and maintain the core frameworks, abstractions, and developer tooling that power multiple data feeds, ETL pipelines, and data integrations across Europe.
  • Modern & AI-Native Stack: Work with Kafka, AWS/GCP, event-driven architecture, and Java/Spring—backed by a fully AI-integrated daily workflow.
  • Solve Real Data Scale: Tackle heavy data volumes, batch processing, and various integration patterns.
  • True Product Ownership: One long-term evolving logistics platform, no body-leasing or software house setup, and a candid, "No-BS" engineering culture.
  • Flexibility: Remote-first across Poland with an optional Wrocław office setup (Powstańców Śląskich).

,[] Requirements: Testing, AI, Cloud, Security, Java, TypeScript, Node.js, Kafka, Integration, Architecture, Ownership, REST API, ETL, Spring, API, Logistics, GCP, AWS, C#, Python Tools: Confluence, GitHub, GIT, Agile, Kanban.