OTM’s full-stack expertise accelerated aconex GmbH’s HR platform, delivering critical features, stabilizing the codebase, and enabling long-term growth.

By taking full ownership of development, modernizing the codebase, and delivering high-impact HR automation features, our engineer transformed an under-documented system into a stable, scalable platform trusted for continuous expansion.

Client
German entity of aconex, the $1.2B construction-collaboration platform now fully integrated into Oracle’s Construction & Engineering suite.
Engagement
Outstaffing by Time & Material, started 2023, ended 2025
Team
1 FTE, Full-Stack Software Engineer
Project
Expansion of HR management platform incl. survey engine, automation & performance optimization
Assurance
Socially insured, EU-based and fully compliant

Client goals

aconex GmbH needed to expand their HR management tool with a new customer satisfaction survey feature, something their clients urgently required. The system suffered from missing documentation, inconsistent code quality, and lacked a dedicated developer who could maintain, extend, and stabilize the platform. After difficulties with a previous developer, the client needed a reliable expert who could work independently and deliver fast.

  • Unstable codebase: The system required structural improvements, clearer logic flows, and better maintainability to support long-term feature growth.
  • Urgent feature delivery: Survey module needed to be implemented quickly for real users
  • Resource gap: Client had no in-house developer who could own the system end-to-end
  • Scalability needs: Growing user base required optimizations for larger datasets and automated workflows
aconex GmbH needed someone who could take full responsibility, stabilize the tool, and deliver new features without requiring constant oversight.

OTM solution

OTM introduced Edi, a full-stack engineer experienced in Java, Spring, Backbone.js, and end-to-end feature delivery. From day one, he took ownership of the product, cleaned up the technical foundation, and ensured predictable, fast results.

  • Implemented the customer satisfaction survey module end-to-end, including automated sending & result preview
  • Cleaned and stabilized the existing codebase
  • Added major HR features: vacation tracking, invoice generation, workflow automation
  • Created clean SQL migrations and backend logic in Java 8 + Spring
  • Built new views and UI components in Backbone.js
  • Prepared deployment-ready packages with instructions for migration scripts
  • Optimized performance for growing datasets as the client’s customer base expanded
  • Ensured full compliance with German HR and data standards

What impressed the client most was Edi’s independence and reliability. He translated business needs directly into solutions, with almost no meetings required.

Results

Delivery

96%

on-time delivery rate across all major features and releases, including complex HR automation modules

Performance

27%

faster backend response times achieved through database and API optimizations for large datasets

Reliability

0

critical production issues over two years, thanks to stable code, clean migrations, and thorough validation

Continuity

2

years on the project, with multiple extensions

The client repeatedly extended the collaboration and proactively raised the hourly rate, because of the excellent results and dependable long-term support.

Meet our Expert behind this case

Edi, Full-Stack Software Engineer, joined aconex GmbH in August 2023. He was responsible for full-cycle development: requirement analysis, frontend & backend implementation, database migrations, testing, and preparing production deployments.

Edi represents OTM’s model of long-term, compliant, high-impact engineering support, combining independence, reliability, and technical depth.
OTM made the entire collaboration effortless. From fast onboarding to ongoing support, I always felt backed by a team that communicates clearly and acts quickly. This allowed me to focus fully on development and deliver reliable results for the client.

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