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Senior Fullstack Engineer (Java&Kotlin + JavaScript)

Role overview

Qualifications

  • Proficiency in Java and Kotlin
  • Strong skills in JavaScript
  • Experience in API design and partner integration
  • Ability to lead technical projects

Responsibilities

  • Facilitate seamless onboarding of external partners by designing robust API contracts
  • Write high-quality developer documentation
  • Create mock environments for integrations
  • Drive the development of modern web interfaces

About the company

The Codest logo

The Codest

IT Services & IT Consulting

The Codest - International Tech Software Company with tech hubs in Poland. Our core values "Customers and People First" prioritises the needs of our customers and collaborative environment for our employees, enabling us to deliver exceptional products and services. Our unique history is based on successful product development and scaling it as an independent company. Our mission became clear after many years of software development, as we want to specialise in scaling tech teams for clients and partners thanks to a quality-first approach in development. Our expertise lies in web development, cloud engineering & DevOps and quality assurance (QA). We became SaaS& E-commerce experts and onboarded vertical portfolio companies from various industries such as FinTech and AdTech. Our offer to cooperate consists of two models: team extension to build technical teams and project development. See what our partners say about our cooperation on our Clutch profile (https://clutch.co/profile/codest).

Company details

Company typeSME
IndustryIT Services & IT Consulting
Company size51 - 200

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Job description

🌍 Hello World!

We are The Codest - International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services.

Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams.

But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step.


Project description:

Our client is one of the largest e-commerce platforms in Europe, used by millions of users every day. The company connects sellers - from small businesses to global brands - with customers, offering a vast product selection, fast delivery, and a well-crafted shopping experience.

The subject of the contract is the provision of professional services within the New Ventures Core Tech area. This area focuses on launching innovative services with external strategic partners. Under the operational model, external partners predominantly integrate by calling the Purchaser’s APIs.

Engineer in this project will act as a technical leader and the architectural anchor for these integrations.

The role:

  • API Design & Partner Integration: Facilitating seamless onboarding of external partners by designing robust API contracts, writing high-quality developer documentation, and creating mock environments.

  • Frontend Development: Driving the development of modern web interfaces (including checkout paths, landing pages, and discovery hubs) that consume the integrated partner services.

  • Technical Leadership: Bridging Java backend design with modern frontend development to ensure cohesive, end-to-end technical implementation.

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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