Senior Backend Engineer

About the role

You will lead the design and delivery of core Yes AI infrastructure, including the MCP server, natural language integration layer, and the Semantic Context Layer that encodes Yes Energy's power market expertise. You will provide architectural guidance on how Yes Energy data from Oracle and Snowflake is structured and exposed to AI agents and LLM-powered applications. You will work closely with data engineering, operations, and infrastructure to build services that support real-time, AI-driven customer workflows. You will engage actively in all product life cycle phases, emphasizing design and strategic planning while mentoring Backend Engineer IIs and elevating the technical bar of the team. You will drive technical discussions and partner with engineering leadership on design and planning decisions, and you will engage directly with cross-functional stakeholders such as product, domain experts, and occasionally customers to shape the right solutions. This role requires a deep commitment to high-quality communication, continuous improvement, and taking pride in delivering reliable backend systems that power critical energy market analytics.

Key facts

What you'll do

Lead the design and delivery of core Yes AI infrastructure: MCP server, natural language integration layer, and the Semantic Context Layer that encodes Yes Energy's power market expertise.

Provide architectural guidance on how Yes Energy data (Oracle, Snowflake) is structured and exposed to AI agents and LLM-powered applications.

Work closely with data engineering, operations, and infrastructure teams to build services that support real-time, AI-driven customer workflows.

Engage actively in all product life cycle phases, emphasizing design, planning, and strategic decision-making activities.

Mentor Backend Engineer IIs and elevate the technical bar of the team through code reviews, knowledge sharing, and best practices.

Drive technical discussions and partner with engineering leadership on design, roadmap, and planning decisions for backend systems.

Engage directly with cross-functional stakeholders including product managers, domain experts, and occasionally customers to translate requirements into robust backend solutions.

Design, implement, and maintain scalable and reliable backend services using Java and Python in cloud environments.

Collaborate with data engineering and infrastructure to integrate data pipelines, ETL tools, and data platforms such as Snowflake.

Ensure backend services are performant, secure, and aligned with Yes Energy's standards for reliability and operational excellence.

Contribute to API design and evolution, building well-defined REST interfaces that support AI and customer-facing applications.

Support debugging, monitoring, and incident response for backend services in production environments.

Champion software development practices such as testing, documentation, and continuous improvement within the team.

Act as a technical leader in scoping efforts, estimating complexity, and guiding implementation details for backend features.

Help translate complex energy market data concepts into clear system designs that meet business and customer needs.

Requirements

Bachelor's degree in Computer Science, Data Science, Mathematics, or related field.

7+ years of software engineering experience with demonstrated technical leadership.

Deep expertise in Java and solid Python skills for backend development.

Working knowledge of relational database management systems such as SQL Server.

Extensive experience developing for and working in cloud environments, with Snowflake preferred.

Extensive experience designing, building, and consuming REST APIs for backend services.

Familiarity with data integration and ETL tools used in analytics and data platforms.

Strong written and verbal communication skills to bridge technical and non-technical stakeholders.

Self-directed mindset with the ability to support the needs of multiple teams, systems, and products simultaneously.

Comfortable working in an agile, fast-paced environment while maintaining focus on delivery quality.

A commitment to writing clean, maintainable, and well-tested code aligned with production standards.

Ability to understand complex business domains and translate them into technical requirements and system designs.

Willingness to collaborate closely with data, product, and operations teams to drive successful outcomes.

Nice to have

Background in system design with a focus on scalability, reliability, and maintainability for software systems.

Proven experience delivering high-quality code in production APIs or data pipelines with strong testing and TDD practices.

Knowledge or interest in energy, commodities, or trading environments, or a demonstrated ability to quickly learn domain-specific concepts.

Experience with MCP servers, natural language integration layers, or semantic context layers for AI applications.

Understanding of energy market data structures, pricing, and analytics use cases.

Experience mentoring junior engineers and fostering a collaborative, high-performance engineering culture.

Practical notes

Full-time position.

Hybrid arrangement requiring presence in the office 2-3 days per week.

Reporting to the Engineering Manager.

Salary range is net 17,000 to 20,000 RON per month.