Senior Backend Engineer

Everything starts with a spark. An idea, a vision, the beginning of a journey. Founded in 2016 in Cluj-Napoca, we’ve grown rapidly thanks to our passionate team and our unique approach to every project. At InnovatorSpark, we turn ideas into impactful solutions by combining creativity, imagination, and technical expertise. We don’t just build software, we create meaningful, memorable experiences for our clients. What drives us is our ability to truly understand their needs, stay committed, and deliver real value.

Transparency, teamwork, and a sense of fun define how we work. Because when we enjoy what we do, we build stronger connections with each other and with everything we create.

As a Backend Engineer in our team you will contribute to the design, development, and maintenance of robust backend services supporting a modern software platform used in the automotive domain. You will work in a complex technical environment involving Python backend, cloud deployment, and integration with a Node.js, React and TypeScript frontend.

This role requires on-site presence at the office at least three days per week.

What You’ll Do:

• Design, develop, and maintain backend services using Python and Flask;
• Build and maintain RESTful APIs and contribute to a microservices-based architecture;
• Use Docker to containerize services and support deployment in cloud environments;
• Integrate and manage message brokers such as RabbitMQ for asynchronous communication;
• Write and maintain unit and integration tests using Pytest;
• Create and maintain technical documentation, especially for previously undocumented components;
• Debug and resolve complex issues across the backend stack;
• Work with PostgreSQL and ensure efficient, reliable, and maintainable data handling;
• Collaborate with frontend developers and cross-functional teams to ensure seamless integration across the application;
• Contribute to the continuous improvement of backend architecture, development practices, and technical quality.

What We’re Looking For:

• 4+ years of experience in backend software development;
• Expert-level proficiency in Python and solid hands-on experience with Flask;
• Strong understanding of Docker and containerized development environments;
• Experience with message brokers such as RabbitMQ;
• Solid knowledge of RESTful API design and microservices architecture;
• Experience with PostgreSQL or similar relational databases;
• Hands-on experience writing automated tests using Pytest;
• Ability to reverse-engineer and work effectively with legacy or undocumented codebases;
• Strong problem-solving and debugging skills;
• Ability to work independently and take ownership of technical topics;
• Good communication and collaboration skills;
• Bachelor’s or Master’s degree in Computer Science, Electronics, Software Engineering, or a related field.

Nice to Have

• Understanding of Node.js, React, and TypeScript;
• Familiarity with GraphQL;
• Basic knowledge of AWS services such as EC2, S3, Lambda, or CloudWatch;
• Experience working in cloud environments such as AWS, Azure, or GCP;
• Experience with CI/CD pipelines and DevOps practices;
• Exposure to automotive software environments or complex distributed systems.

Our Values

At our core, we believe great work starts with trust, creating a space where clients and colleagues feel confident, supported, and understood. We are committed to delivering quality through expertise, clear communication, and the flexibility to adapt to every challenge. Open and honest communication is at the heart of how we collaborate, fostering transparency, constructive feedback, and a safe environment where everyone can contribute freely. We thrive on teamwork, valuing each individual’s strengths to create balance, harmony, and better outcomes together. And while we take our work seriously, we never forget to have fun because a positive, energetic atmosphere fuels creativity, strengthens connections, and helps us do our best work every day.

At InnovatorSpark, every line of code, every idea, and every project contributes to something bigger. Ready to make an impact? Apply now!