FullStack developer

About the Role

We’re looking for a Senior Software Engineer to join a newly forming team focused on rebuilding and modernizing our internal accounting platform. This is more than a feature delivery role—it’s an opportunity to shape a business‑critical system, influence technical direction, and help define how the platform evolves for the future.

As part of a small, high‑impact team you’ll have strong ownership and autonomy from day one, combining hands‑on engineering with technical leadership. You’ll work closely with Product Managers and stakeholders to break down a complex legacy system into scalable modern services using .NET, Vue.js, and modern architectural practices.

The new platform is built on a best‑in‑class accounting solution, which means the team’s focus shifts away from reinventing foundational accounting mechanics and toward what creates the most value: engineering deep, reliable integrations with Frontiers’ internal systems. You’ll be designing the connective tissue that makes the platform feel seamless across the organization—robust, maintainable, and built to last.

To build those integrations at speed and quality, we use spec‑driven development powered by AI. Engineers author precise functional and technical specifications first; from those specs, AI tooling generates integration code as a starting point, which the team then reviews, refines, and owns. This workflow raises the bar for clarity and intentionality in software design, and it means you spend more time on architecture, edge cases, and correctness—and less time on boilerplate.

We’re investing in AI‑driven engineering workflows and modern software delivery approaches, giving you the opportunity to work with emerging technologies while solving complex technical challenges at scale. If you’re excited by modernization projects, technical ownership, close collaboration, and a supportive environment that values work‑life balance, we’d love to hear from you.

Requirements

Key Responsibilities:

• Design and build scalable, high‑performance applications using .NET and Vue.js.
• Modernize and enhance legacy solutions while helping shape the platform’s future architecture.
• Optimize SQL Server and MongoDB performance, including queries, indexing, and transactions.
• Collaborate closely with Product Managers, architects, and cross‑functional teams to turn business needs into impactful technical solutions.
• Design, develop, and integrate scalable RESTful APIs within a microservices architecture.
• Write clean, maintainable code and champion engineering best practices through testing and code reviews.
• Improve application performance, scalability, and reliability across the platform.
• Mentor engineers, lead code reviews, and contribute to a strong engineering culture.
• Explore and adopt modern development approaches, including AI‑powered engineering workflows and AI‑enabled product experiences.

Required Skills and Experience:

• 4+ years of experience in software engineering, specializing in .NET Core/Framework.
• 3+ years of hands‑on experience with Vue.js, including Vue 2 and Vue 3.
• Familiar with Agile/Scrum methodologies.
• Skilled in building and consuming RESTful APIs.
• Deep expertise in Vue.js, including Vue 2 and Vue 3, with a strong understanding of state management, component‑based architecture, and best practices for building scalable front‑end applications.
• Experience troubleshooting complex production issues using monitoring tools such as New Relic, Grafana, and others.
• Experience with MongoDB.
• Hands‑on experience with the Azure cloud platform.
• Strong proficiency in object‑oriented programming and SOLID principles.
• Proficient in leveraging AI to enhance daily engineering work.
• Solid understanding of microservices and micro‑frontend concepts.
• Excellent problem‑solving skills with strong attention to detail.

Nice‑to‑Have Skills:

• Strong expertise in SQL Server, including performance tuning, indexing strategies, query optimization, and troubleshooting production issues.
• Experience in implementing asynchronous microservice communication with RabbitMQ.
• Exposure to CI/CD pipeline creation in Azure DevOps.
• Experience integrating AI solutions into customer‑facing applications.
• Experience integrating third‑party products and services.
• Experience with containerization platforms (e.g., Docker, Kubernetes).
• Experienced in leveraging Camunda for business process orchestration and automation in microservices architectures.
• Experience with Kafka.
• Experienced with testing frameworks like NUnit, Playwright.
• Experience with Domain Driven Design, system architecture, and event‑driven architecture.
• Knowledge of BDD and TDD.

Benefits

• We prioritise office presence and emphasise in‑person collaboration, but also offer appropriate adjustments where needed, in line with company policy.
• Extra wellbeing days on top of your annual leave allowance.
• Up to 3 paid volunteering days each year.
• 24/7 confidential Employee Assistance Programme (wellbeing, mental health, legal & financial support).
• Learning & development support via the Frontiers Learning Hub.
• Competitive local benefits country dependent (e.g. healthcare and pension/retirement provision).