Intermediate Developer – Enterprise Applications in the Energy Sector

Project overview

Application/Offer Deadline October 13, 2026, 2:00 PM

Contract Type: Service project. Clarify employment type/freelancer admissibility and supply chain before submission.

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Project Framework Conditions

Project details

Frankfurt am Main (Project Site)

10/20/2026–10/19/2029; approx. 36.01 months

Scope: 692 PT of which 692 remote, 0 Onsite = 100.00% remote

Utilization: Average approx. 4.42 days/week

Languages: English professional proficiency (C1); German: Native/C2

Onshore: Germany

Conditions – Mandatory Information for Candidates:

For further processing of your application, this information is mandatory: Please state your desired billing method and your hourly or daily rate, separated for remote and onsite. Also indicate whether travel expenses are included or will be charged separately. If charged separately, please state the amount or the basis for calculation.

1.1 Project/Process Context

Stabilization and modernization of business-critical applications and cloud database platforms in the energy/infrastructure environment; secure operation, availability, and performance.

1.2 Project Structure

Agile project with management, architecture, development, testing, DevOps, and business departments. Specifications for target architecture, acceptance, and operation; current, traceable, and audit-proof requirement, architecture, test, operation, and release documentation.

3.1. Scope

Independent and self-organized: Evaluate requirements based on complexity, feasibility, and effort; develop Java components with Spring Boot, Quarkus, JSF, and Angular. Integrate REST/SOAP/JMS/MQ interfaces; resolve errors sustainably. Perform component/integration/developer tests. Deploy releases with Build/Deployment/CI-CD; maintain development/test environments with JBoss/Tomcat. Optimize database-related components with Oracle, PostgreSQL, JDBC, JPA, Hibernate, SQL/PL-SQL. Implement architecture/quality specifications; use Git, Maven, Docker, OpenShift, and Cloud. Document technically in German/English.

4.1 Must-Have Requirements - 100% Mandatory to Fulfill

4.2 Should-Have Requirements

• Conditions / Billing Method (Hourly or Daily Rate)
• Hourly Rate Remote (EUR/hour) and Hourly Rate Onsite (EUR/hour)
• Or Daily Rate Remote (EUR/day) and Daily Rate Onsite (EUR/day)
• Travel Expenses
• M1: Enterprise Web Applications (e.g., Spring Boot, Quarkus, JSF, Angular) — References: 5
• M2: Database Development (e.g., Oracle, PostgreSQL, SQL, PL/SQL, Hibernate) — References: 5
• M3: Container and Platform Technologies (e.g., Docker, OpenShift) — Intermediate (> 3 years experience)
• M4: Middleware and Application Servers (e.g., JBoss, Tomcat, Apache) — References: 5
• M5: Interface Development (e.g., REST, SOAP, JMS, MQ) — References: 5
• S1: Windows Know-how — References: 5 | 20%
• S2: Linux Know-how — References: 5 | 20%
• S3: Build, Deployment, and CI/CD Toolchain — References: 5 | 15%
• S4: Setup and Maintenance of Development Environments (e.g., JBoss, Tomcat, Apache, Linux, Windows, HP-UX) — References: 5 | 15%
• S5: Taking on Development Tasks from Architecture Management — References: 5 | 10%
• S6: Conception and Execution of Developer Tests — Intermediate (> 3 years experience) | 10%
• S7: Conception and Implementation of Process Improvements — References: 5 | 10%
• Start: 2026-10
• Duration: 36 Monate
• Remote: remote
• Location: Frankfurt am Main, Deutschland, DE
• Languages: German