Senior Fullstack Engineer – Java, Kotlin, JavaScript

Job not on LinkedIn

🕒 August 20

🇵🇱 Poland – Remote

💵 zł20k - zł27k / month

⏳ Contract/Temporary

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 20%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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The Codest

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

📦 Logistics

🏥 Healthcare

Consulting • Logistics • Healthcare

The Codest is an international software development company with its headquarters in the United Kingdom and tech hubs in Poland. Specializing in building IT teams and digital services, The Codest provides high-quality software development solutions for enterprises, scale-ups, and software vendors. They focus on supplying experienced senior developers in areas such as backend and frontend development, cloud engineering, and data engineering. Known for their expertise in project development and staff augmentation, The Codest helps companies enhance their IT departments by offering top-notch developers. The company is dedicated to providing innovative solutions and supporting digital transformation for its clients across various sectors including fintech, e-commerce, and adtech.

📋 Description

• Facilitate seamless onboarding of external partners through robust API contract design • Write high-quality developer documentation • Create mock environments for partner integrations • Drive development of modern web interfaces, including checkout paths, landing pages, and discovery hubs • Build frontend interfaces that consume integrated partner services • Bridge Java backend design with modern frontend development • Act as technical leader and architectural anchor for integrations in the New Ventures Core Tech area • Support innovative services launched with external strategic partners

🎯 Requirements

• Deep, hands-on experience in Java and Kotlin • Strong track record in designing, building, and scaling RESTful APIs • Experience with API-first design and OpenAPI/Swagger • Proficiency in modern JavaScript/TypeScript and a modern framework; React highly preferred • Solid understanding of distributed systems and integration patterns • Knowledge of secure authentication, including OAuth 2.0 and OpenID Connect • Ability to define coding standards, lead technical discussions, and design flexible API contracts for external B2B partners • English level minimum B2+ • Availability for the Incident Response service • Experience dealing with data isolation and security standards is nice to have • Eagerness to explore and implement Agentic AI tools such as Copilot and LangGraph is nice to have

🏖️ Benefits

• Access to the Worksmile platform • A work environment that values growth and innovation • B2B contract