Staff Engineer (m/w/d)

Job Description

We hope you want join our friendly and open minded team. You'll be able to contribute to the company's development as well as a sustainable future. Together we will work for a better tomorrow!

At Greenely, we're building the next generation of cloud‑native energy systems that process real‑time data from millions of connected devices. Our mission is simple but bold: help households lower energy consumption and accelerate the shift toward a more sustainable future.

As a Staff Engineer (Back‑End/Platform), you'll lead cross‑team architecture and be a hands‑on builder. You'll set technical direction for high‑scale data and API systems, raise the bar on reliability and developer experience, and create a psychologically safe environment where engineers can do the best work of their careers.

What you'll lead

• Own technical strategy for key platform domains (e.g., real‑time ingestion, time‑series storage, APIs, event pipelines), balancing performance, reliability, and cost.
• Level up the platform: establish standards for testing, observability (metrics/logs/traces), CI/CD and deployment, and resiliency (SLOs, error budgets, incident response).
• Drive cross‑team initiatives: author and review RFCs, define service boundaries and contracts and lead design reviews that align product, data, and platform needs.
• Mentor and educate: coach senior and junior engineers, model inclusive communication, and foster psychological safety-invite dissenting views and make trade‑offs explicit.
• Ship meaningful outcomes: contribute code in Python; guide migrations, de‑risk complex changes, and improve developer productivity (tooling, guardrails, docs).

What you'll bring

• Extensive back‑end experience with deep proficiency in Python and distributed systems.
• A track record designing and scaling APIs and data platforms handling high‑volume time‑series/real‑time data under performance constraints (REST/gRPC, Django/FastAPI, PostgreSQL, Aerospike, Redis).
• Practical expertise with microservices, containers, and cloud (AWS preferred), plus infrastructure as code (Terraform), and orchestration (Kubernetes).
• Comfort with event‑driven patterns and streaming/messaging (e.g., Kafka/Kinesis/SNS/SQS) and strong data‑modeling instincts.
• Experience implementing and operating application performance monitoring (APM) and full observability systems-metrics, logs, and distributed tracing-and using these insights to design, scale, and maintain highly reliable distributed services
• Proven ability to lead through influence: communicate clearly with engineers and stakeholders, write crisp design docs, and challenge assumptions respectfully ("dare to speak up").
• Commitment to security, privacy, and reliability by default; experience running on‑call and post‑incident learning.
• Fluency in English; Swedish is a plus.

Bonus points

• Experience with IoT data pipelines, MQTT/edge connectivity, or device telemetry at scale.
• Observability at scale (OpenTelemetry), performance tuning, and FinOps/cost optimization.
• Experience with data engineering tools such as Apache Iceberg, Airflow, Spark or DBT
• Leading large migrations (e.g., monolith → services, storage transitions, multi‑region).

What success looks like (first 6-12 months)

• A clear architectural roadmap for a core domain, executed via collaborative RFCs and phased delivery.
• Improved availability, and measurable reduction in incident frequency/severity.
• Standardized design review and SLO practices adopted across teams; stronger developer experience and velocity.
• Mentored engineers stepping up to lead components and cross‑team efforts.

Why join Greenely?

• Tech with purpose: Tackle high‑impact platform challenges that directly help people reduce energy use and CO₂ emissions.
• Impact at scale: Shape cloud‑native systems processing real‑time data from smart meters and edge‑connected devices.
• Growth and influence: Your decisions will guide how we design, scale, and evolve our backend architecture and developer experience.
• Culture and benefits: Wellness allowance (5,000 SEK/year), paid wellness hour, private health insurance, occupational pension, competitive salary, and a centrally located office at Vasagatan 40. We value in‑person collaboration and offer flexibility: 4 days in the office and 1 day remote per week.
• Start date: Flexible
• Location: Stockholm, Sweden

Greenely is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive, psychologically safe environment for all employees.