903 backend developer English-speaking jobs in Warsaw

); confident designing, developing, and maintaining backend systems at scale. ... Requirements Backend Development: PHP Expertise – 5+ years of commercial experience with PHP (7 or higher ... Experience designing and maintaining RESTful APIs; comfortable owning API contracts across frontend, backend ... You’ll work in a cross‑functional team where backend, frontend, mobile, and design come together to deliver ... Leadership & Collaboration: Team Collaboration – Proven experience in cross‑functional product teams (backend

technologies-expected : ServiceNow JavaScript about-project : As a Senior ServiceNow Developer, you

Qualifications Strong expertise in backend technologies including Go and/or C#. ... Proven experience leading backend engineering teams delivering scalable, production‑grade APIs and platform ... higher in Computer Science, Engineering, or a related field, with a comprehensive understanding of backend

This is not a generic backend role. ... Looking For 5+ years of strong production experience with Python Experience designing and operating backend ... Investigate production issues, trace data problems, and improve system observability Collaborate with backend ... Redis, PostgreSQL, or similar technologies Experience with Go / Golang, especially for high‑throughput backend

Proven professional experience writing production-grade backend services in Go (Golang). ... Experience building internal tooling or limited UIs to support backend systems (e.g., operational dashboards ... designing and implementing container‑based microservices and integrating open‑source tools to customize backend ... Experience with Kubernetes or similar container orchestration platforms, including deploying and operating backend

Responsibilities Translates developer and internal stakeholder feedback into actionable requirements ... specifications (e.g., OpenAPI, OAuth2/OIDC, MCP), SDK and documentation generation workflows, and docs/developer ... Provides technical guidance to internal teams adopting API standards, SDK/IaC workflows, and docs/developer ... attention to maintainability and reuse Creates or extends plugin and integration patterns for docs and developer ... Engineering, or equivalent experience Experience building and operating production services and/or developer

You will work as part of an experienced engineering team, contributing to backend development, component ... how we build, modernize and evolve the product.ResponsibilitiesDesign, implement, test and maintain backend ... degree in computer science, information technology, or a related fieldSolid experience with C#/.NET and backend

Next.js PostgreSQL technologies-optional : AWS Microsoft Azure about-project : As a Senior C# Developer

Salesforce Developer (Certinia PSA)ResponsibilitiesDesign, develop, and maintain custom Salesforce solutions ... problem‑solving skills.Level of English – Upper‑Intermediate and above.Nice‑to‑havesSalesforce Platform Developer

Responsibilities Architect, build, and maintain scalable and reliable backend services and APIs that ... feature teams to define requirements, agree on API specifications, and ensure seamless integration of backend ... Conceptualize and implement backend solutions to effectively surface the value of premium features, including

Senior Frontend Developer provides technical guidance, develops software features, and mentors junior engineers.

technologies-expected : Java Spring Boot about-project : As a Senior Java Developer, you will be

Requirements Full stack developer (70% back-end / 30% front-end). ... On behalf of FinTech Client #4, SD Solutions is looking for a talented Senior Software Developer (Java

Senior full‑stack SharePoint developer for an EU agency near‑site contract in Warsaw. ... ICT‑relevant degree (Level 6+) and 4+ years of ICT professional experience 2+ years in a full‑stack SharePoint developer

product roadmap for SAM’s cloud landing zone and associated services, balancing security, compliance, developer ... workflows in favour of programmatic access, Infrastructure‑as‑Code, and API‑first interfaces.Own the developer ... and Scrum; comfort with backlog management and sprint/flow‑based delivery.Track record of improving developer ... for experience in the healthcare sector including HIPAA, HITRUST, ISO27001, GDPR.AWS certifications (Developer ... Prometheus) and incident management practices.Experience with platform onboarding automation or internal developer

changes involving relevant SDKs and architectural dependencies.Mentor the DocES development team on backend ... components as they evolve.Maintain up‑to‑date system design documentation for new and enhanced DocES backend ... implementations align with enterprise security architecture principles.Bridge between DocES and the Digital Core Backend

models into scalable products.Develop and maintain both frontend interfaces (React, Next.js, etc.) and backend ... AI‑powered web applications.2+ years of experience in software development, covering both frontend and backend ... interactions.Integrate foundation models and APIs (OpenAI, Anthropic, Hugging Face, Stability, etc.) into robust backend

Responsibilities Own backend and platform components that orchestrate distributed compute for enterprise ... role As a Staff Engineer on the Spark Job Manager and Starburst Enterprise team, you will own critical backend ... Qualifications 8+ years of professional backend experience, with strong expertise in Java and production‑ready

Design and implement scalable, cloud-native Java applications within a Banking as a Service (BaaS) model. Develop software aligned with user needs and business goals. Analyze, troubleshoot, and resolve application issues. Collaborate on application architecture and technical decisions. Support and mentor team members.

Design, build, and maintain backend services in Java, Scala and PHP that power Box's critical content ... scalable distributed systems at large scale.Strong coder with demonstrated proficiency in one of the backend