Senior Backend Engineer

The electrical grid is the largest and most complicated machine ever built. Yes Energy’s industry-leading electric power trading analytics software provides real-time visibility into the massive amount of data generated by the North American electrical grid daily. Our unique and innovative view of the data informs real-time trading decisions and mid-to-long-term investment decisions that keep utility prices low, support the energy transition, and keep the grid running. It’s both challenging work and work with a purpose.

In the Engineering group, we are accelerating the product vision by building solutions in a fun, collaborative, efficient, and adaptive team. As a Senior Backend Engineer, you will collaborate with leaders in technology, data, and energy to build solutions and tools for handling the highly complex problems posed by the evolving power grid. You will also work directly on projects to integrate systems and serve energy data to customers. We are curious people who take pride in our work, value high-quality communication, and strive to improve continuously.

• Salary range: Net 17.000 - 20.000 RON/month
• Location: Bucharest, Romania
• Full-time
• Hybrid - Will be required to work in the office 2-3 days a week
• Reporting to: Engineering Manager

• →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 to build services that support real-time, AI-driven customer workflows
• →Engage actively in all product life cycle phases, emphasizing design and strategic planning.
• →Mentor Backend Engineer IIs and elevate the technical bar of the team
• →Drive technical discussions and partner with engineering leadership on design and planning decisions
• →Engage directly with cross-functional stakeholders — product, domain experts, and occasionally customers — to shape the right solutions

• 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; solid Python skills
• Working knowledge of relational database management systems such as SQL Server.
• Extensive experience developing for and working in cloud environments, Snowflake preferred
• Extensive experience designing, building, and consuming REST APIs.
• Familiarity with data integration and ETL tools.
• Strong written and verbal communication; comfortable bridging technical and non-technical stakeholders
• Self-directed and comfortable supporting the needs of multiple teams, systems, and products.

• System Design & Maintenance: Applies architectural thinking to design scalable, reliable, and maintainable software systems, expertly evaluating trade-offs and aligning technical choices with business goals
• Technical Execution: Delivers exceptionally high-quality code in production APIs or data pipelines while adhering to rigorous testing frameworks and test-driven development (TDD)
• Energy Industry & Customer Understanding: Background in data-intensive environments (e.g., equities/commodities trading) or a strong desire to learn the wholesale electric power industry
• Effective Communication: Strong written and verbal communication skills, comfortable bridging technical gaps and explaining complex system choices to technical and non-technical stakeholders alike
• Problem Solving: Applies structured thinking to break down multi-layered technical challenges, ensuring that backend services support seamless, real-time AI capabilities
• Strategic Influence: Leads through expertise and initiative, coaching junior team members, driving planning decisions, and elevating the broad technical direction of the engineering unit

Yes Energy delivers real-time market data and electric power trading decision solutions.  Over 1,000 market participants use Yes Energy solutions daily.  The business is a leader in all aspects of information content collection and management, developing and delivering data and market analytics solutions. Since its inception in 2008, Yes Energy has become a trusted and respected supplier of innovative and reliable solutions focused on the needs of power market analysts, traders, and trade managers.  Yes Energy has a team of 400 amazing professionals in Boulder, CO (HQ); Boston, MA; Chicago, IL; Glendora, CA; Richmond, VA; London, United Kingdom; Auckland, New Zealand; and Bucharest, Romania.

Yes Energy has been named one of the Best Places to Work in Colorado, and we have the culture to prove it. At Yes Energy, we care about saying “Yes” to customers. We like to listen, learn, and develop our solutions in line with their needs. We think about customers as business partners, and when we help them be more successful … we are more successful, too.

Around the office, our culture is driven by some pretty fundamental values that we’re proud of:

• We love innovation and solving tough challenges;
• We are “high standards people” who combine passion and pride with hard work and rewards of all kinds-- in an ethic that is consistent across the company.
• We’re team-focused with a flat hierarchy-- we work in small teams on well-defined projects that directly impact the success of the business;
• We play to the strengths and experience of each person while each of us also works along a continuum of roles adjacent to our focus area.  This presents the challenge of maintaining a broad set of skills as well as an opportunity to learn and contribute in many ways. 
• We are constantly growing. Professional development happens every day and every year.