Senior Software Engineer (Integrations)

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

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.

Must have: Testing, AI, Cloud, Security, Java, TypeScript, Node.js, Kafka, Integration, Architecture, Ownership, REST API, ETL, Spring, API

Nice to have: Logistics, GCP, AWS, C#, Python