Senior Software Engineer

Are you interested in building impactful technology in a collaborative, innovative environment? Join AuctionConnect as we scale our digital auction platform that is transforming bunker fuel procurement for the global shipping industry. We are seeking an experienced Senior Software Engineer who thrives on designing robust, scalable systems and enjoys mentoring others while contributing to a culture of technical excellence and growth.

Your Team

You will join a growing Product Development Team, working alongside experienced sales and product colleagues. Reporting to the Head of Engineering, you will be a key contributor in developing and implementing innovative solutions that address the complex challenges of bunker trading, fuel supply, and risk management for our global shipping clients. Our team blends local skills with international perspectives, cultivating a collaborative, agile environment where technical excellence and innovation are at the core. This is your opportunity to help shape the technical direction of a platform that is redefining the maritime industry.

Pursuing Engineering Excellence and Team Synergy

As a Senior Software Engineer, you will play a pivotal role in advancing innovation and delivering customer value by helping implementing engineering best practices in an agile environment. You will contribute to shaping our technical architecture, mentor team members, and support a positive, cooperative work environment. Your technical proficiency will be instrumental in ensuring our platform scales effectively to meet the demands of the global maritime fuel market.

More specifically, your responsibilities include:

• Design, develop, and maintain secure, scalable auction features using .NET and React.
• Ensure code quality and maintainability through diligent testing practices and CI/CD pipelines.
• Assist in complex problem-solving and identifying and resolving issues as needed.
• Continuously evaluate and improve development processes, tools, and methodologies to enhance productivity.
• Mentor and train team members, supporting their skill development and career growth.

Experienced Engineer with Modern Technology Proficiency

We are looking for a software engineer with a demonstrated ability to deliver impactful projects and a commitment to building systems that create real business value. You understand the importance of balancing technical excellence with pragmatic delivery in a results-oriented environment.

Additionally, you have the following qualifications:

• Substantial experience as a software engineer working on web applications.
• Solid experience in the ReactJS ecosystem, including state management and component-based architecture.
• Practical experience with full-stack development in the .NET ecosystem and the Azure cloud.
• Extensive skills in SQL/NoSQL databases.
• Proficient in understanding CI/CD, DevOps, and security best practices.
• Familiarity with containerization tools (e.g., Docker) and orchestration platforms (e.g., Kubernetes).
• Good knowledge of authentication protocols and flows, such as OAuth 2.0 and OpenID Connect (OIDC).
• Familiarity with Agile/Scrum methodologies, software design patterns, and system scalability principles.
• Good communication skills to support knowledge sharing and collaboration.
• You demonstrate a high level of English, spoken and written

What We Offer

When joining AuctionConnect, you will have the opportunity to grow professionally in a supportive environment that values learning, collaboration, and long-term development. We offer a flexible work culture that allows remote work while promoting meaningful in-person collaboration when it matters most.

Furthermore you get:

• Mostly remote work with occasional visits to our Porto office for in-office collaboration when necessary.
• Salary reflective of your experience and the Porto market standards.
• Health insurance coverage for you and your family to support your overall well-being.
• Monthly meal allowance to support your daily needs.
• Training and learning opportunities to encourage personal and professional development.
• A diverse, international team environment that values innovation and collaboration.

We are looking to fill the position as soon as possible, so if you see yourself thriving in taking on the above-mentioned tasks, we look forward to receiving your application. Applications and CVs are reviewed on an ongoing basis, and we reserve the right to remove the advertisement when we find the right candidate. Please note there may be prolonged response times over the Christmas Holidays.

If you have any questions regarding the position, you are welcome to contact Head of Engineering & Site Lead Daniel Costa at

We are looking forward to receiving your application.

About AuctionConnect

AuctionConnect is transforming the way bunker fuel is procured by bringing transparency, efficiency, and measurable cost savings to an industry that has long relied on tradition. Our digital auction platform is trusted by leading players across the maritime world, delivering real value through innovative technology. Having secured a solid position in the market, we are now ready for considerable growth and expansion, and we need talented engineers to help us scale our impact globally.