Staff Engineer (Back‑End/Platform)

- Scale the Systems Powering the Energy Transition

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.

About Greenely

Greenely is on a mission to create the best customer experience for the modern energy consumer through technology. As a digital energy provider, we help people reduce their electricity costs by optimizing their home and car's electricity usage with our smart app. Supported by Nordic venture capital companies, we aim to enable households worldwide to connect, control, and optimize their energy usage. We believe that the best electricity is the one that is never used - a win-win for both wallets and the environment!

WE ARE bold and push the limit.

WE energize each other.

WE think like owners.

WE lead with knowledge.

Please note that we do not accept applications via email as we protect your privacy.

We kindly request recruitment agencies to refrain from contacting us regarding this position as we handle our recruitment efforts in-house. Thank you for your understanding.