Senior Software Developer

PROJECT INFORMATION:   • Industry: Public transport • Business trips: Visit the DK office if needed • Remote • Project language: English • 6 month contract plus extension • Start Date: ASAP • Assignment type: B2B contract Assignment Overview We are looking for an experienced external consultant with deep expertise in Specification-Driven Development (SDD) to support strategic software initiatives. The consultant will play a key role in driving modern software engineering practices where detailed specifications are created before development begins — often to guide AI-assisted coding agents and automated development workflows. Specification-Driven Development (SDD) is a modern software methodology focused on defining structured, behavior-oriented specifications prior to implementation. This approach ensures that AI-assisted development tools and engineering teams clearly understand the required functionality, technical constraints, business rules, and acceptance criteria before code is generated or written. Unlike traditional development approaches that primarily focus on how to code a solution, SDD emphasizes what needs to be built through precise, structured, and verifiable specifications that can serve as executable contracts throughout the software lifecycle. The consultant will help establish and scale these practices across development teams, ensuring higher software quality, improved consistency, reduced defects, and stronger alignment between business requirements and implementation. Main Responsibilities • Lead and drive Specification-Driven Development (SDD) practices across software teams. • Define structured, behavior-driven specifications before implementation begins. • Translate business requirements into precise, testable, and AI-consumable specifications. • Create executable specifications including:• functional requirements • technical constraints • architectural guidelines • business rules • acceptance criteria • Collaborate with architects, developers, QA engineers, and product owners. • Support AI-assisted development workflows and modern engineering automation. • Ensure specifications are reviewed and validated before implementation. • Improve software quality through specification-first engineering practices. • Establish standards for traceability, consistency, and verification. • Mentor development teams in modern specification methodologies and engineering discipline. • Contribute hands-on to software design and implementation when needed. Key Requirements • +8 years of experience in software engineering and enterprise system development. • Proven hands-on experience with Specification-Driven Development (SDD). • Strong understanding of:• AI-assisted software development. • Domain-Driven Design (DDD). • Behavior-Driven Development (BDD). • Test-Driven Development (TDD). • Agile methodologies. • Experience creating executable specifications and structured engineering documentation. • Strong stakeholder management and communication skills. • Ability to bridge business requirements and technical implementation. • Experience working in large-scale or complex enterprise environments. • Strong analytical and problem-solving skills. Technical Competences: Experience with several of the following is expected: • .NET / C#/ Java/ Kotlin • REST APIs and microservices • CI/CD pipelines • Automated testing frameworks • Azure or cloud-native platforms • Git and DevOps practices • Event-driven architecture • Enterprise integration patterns • AI-assisted development tooling Nice to Have • Experience from transportation, railway, or critical infrastructure environments. • Experience with large-scale digital transformation initiatives. • Familiarity with regulated or safety-critical systems. • Experience working with AI coding agents and automated engineering workflows.