Senior Software Engineer (Expert on Integrations)

Permanent employee, Full-time · Barcelona

Role overview

At Flexidao, we are building the data infrastructure to power the future of the energy sector. Our platform's ability to ingest, process, and analyze vast amounts of Meter and Energy Attribute Certificate (EAC) data is core to our mission. We are looking for a passionate Senior Engineer to own and scale the data backbone of our platform, ensuring a reliable and timely flow of data that powers our products and insights.

???? Work setup: Hybrid (1 day/week in-office for Barcelona-based candidates; full remote for the rest of Spain).
Applicants must possess a valid authorization to work in Spain, as visa sponsorship is not available for this position.

Your Challenge

Own the End-to-End ETL Lifecycle: You will design, build, and maintain robust and scalable ETL/ELT pipelines to process data from diverse sources, including third-party APIs, databases, message queues, and flat files.
Build for Scale and Reliability: Ensure the highest standards of data quality, integrity, and performance. You will be responsible for the monitoring, security, and operational excellence of our data integration systems.
Solve Complex Data Challenges: Implement sophisticated data transformations and business logic to turn raw data into actionable information that drives product features and critical business decisions.
Collaborate and Lead: Work closely with product managers and other engineers to define requirements and deliver high-impact data solutions.
Drive Technical Excellence: Contribute to a high-quality codebase through thoughtful code reviews, comprehensive documentation, and a commitment to continuous improvement. You will keep abreast of new technologies and trends to evolve our data stack.

Must-haves

Experience: 5+ years in software engineering, with a demonstrated focus on data integration, ETL development, or backend systems.
Programming Proficiency: Strong coding skills in a modern language. Proficiency in TypeScript is required for this role.
Database Mastery: Strong command of relational databases (e.g., PostgreSQL, MySQL), including data modeling and query optimization.
Problem Solving: A pragmatic and tenacious approach to solving complex technical problems, with the ability to work effectively both independently and within a team.
Cloud & DevOps: Hands-on experience with a major cloud provider (GCP preferred) and container orchestration using Kubernetes.

Nice-to-have

Architectural Vision: Experience with microservices architecture and distributed systems.
Domain Knowledge: Previous experience in the Energy, FinTech, or another data-intensive industry.
Modern DevOps: Knowledge of CI/CD principles and experience building and maintaining automated testing frameworks.
Observability: Familiarity with modern monitoring and logging tools (e.g., Prometheus, Grafana, ELK stack).
Data Orchestration: Experience with workflow orchestration tools like Airflow or Prefect.
API Fluency: Deep understanding of RESTful API design and security standards (OAuth, JWT).

Your Benefits

Multicultural & friendly cleantech startup environment
Birthday off — enjoy your special day!
Hybrid & flexible work setup
Free coffee, tea, snacks & fresh organic fruit in the office
Company-sponsored team events twice a year, plus fun after-work activities
Save money with Cobee on meals, transport, and more
Referral bonus program — help us grow the team and get rewarded

Diversity & Inclusion

In Flexidao we embrace diversity by having and promoting an inclusive and diverse environment. Therefore, we are committed to equal opportunity employment regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender, or gender identity or expression.

Recruitment Process

Google Meet Interview with HR
Google Meet Technical Interview with our CTO and Backend Team Lead
Optional Follow-up Interview with our CTO and Backend Team Lead

Apply now before it’s too late!

We don’t offer just a “job”. It’s about building cool stuff that matters, together with a great team.
If you see yourself working with us and can meet the key requirements, send your CV to join Flexidao to careers@flexidao.com

Apply for this job

About us

Flexidao is a clean energy portfolio management platform designed for corporate energy and sustainability teams managing complex clean energy portfolios.

Our software-as-a-service solution aggregates and standardizes volume and contract data on electricity consumption, production, and energy attribute certificates by integrating with data hubs, registries, and third-party providers.

Flexidao is headquartered in Amsterdam and Barcelona, but it has operations globally. Its broad geographical reach enables a complete view of an organization’s portfolio of clean energy contracts, equipping teams with tools for digitizing and automating crucial workflows, monitoring operational and compliance risks, and evaluating advanced procurement strategies.

Our mission is to improve the return on investment of clean energy procurement, significantly reduce manual workload, enhance internal oversight and strategic insight, and ensure timely and confident reporting to stakeholders.

Apply for this job

We are looking forward to hearing from you!

Thank you for your interest in Flexidao. Please fill out the following short form. Should you have difficulties with the upload of your data, please send an email to careers@flexidao.com