Full-Time

Senior Backend Developer

Posted on 9/11/2025

Octopus Energy

Octopus Energy

1,001-5,000 employees

Supplies 100% renewable electricity and gas

No salary listed

London, UK

Hybrid

Category
Software Engineering (1)
Required Skills
FastAPI
Python
Git
SQL
Apache Kafka
Postgres
Redis
MongoDB
Celery
Data Analysis
Django
Requirements
  • A strong understanding of the Python ecosystem with 3+ years of experience
  • Knowledge of RESTful APIs is a must, preferably with web frameworks like Django or FastAPI
  • Experience with maintaining versioned APIs
  • Experience maintaining event-driven processing systems (AMQP, Celery)
  • Experience with monitoring and debugging applications and infrastructure
  • Experience working on processing large volumes of data
  • Strong SQL and query analysis skills
  • Strong skills in testing and test-driven development
  • Proficient understanding of Git
Responsibilities
  • Build and maintain the critical OCPI infrastructure that connects our platform with Charge Point Operators worldwide, ensuring reliable and scalable integrations
  • Develop core backend features including pricing/tariff flows, location ingestion, session processing, and token management that power the entire Electroverse ecosystem
  • Support CPO integrations through technical troubleshooting, onboarding assistance, and data quality monitoring as part of our team rotation
  • Work in a cross-functional team to deliver robust, well-validated systems that serve as the foundation for innovation across the organization
  • Contribute to infrastructure monitoring and maintenance across APIs, message queues, databases, and caching layers to ensure optimal performance at scale
  • Adapt and optimise systems to handle increased scalability demands as we onboard large new contracts that will significantly increase traffic through the platform
Desired Qualifications
  • Experience with Pydantic for data validation and serialization
  • Experience with ElasticSearch for search and analytics
  • Experience with maintaining high quality documentation for an externally facing product
  • An ability to discuss vision and features within a team and propose creative solutions
  • Familiarity with continuous integration and continuous deployment
  • A knowledge of the protocols used within the EV charging industry

Octopus Energy Group supplies 100% renewable electricity and gas to homes and businesses in multiple countries, offering tariffs such as Agile that adjust with wholesale costs. It operates Kraken, an in-house platform that automates billing, customer service, and grid management using AI to balance supply and demand; Kraken is licensed to other suppliers and will be spun off as a separate company. The group differentiates itself through clear pricing, strong customer service, and a scalable energy-technology platform that supports retail, generation, grid flexibility, and EV services. Its goal is to decarbonize energy use globally by making renewables more accessible and by enabling smarter grids, better pricing, and services like EV leasing and demand-response programs.

Company Size

1,001-5,000

Company Stage

Growth Equity (Venture Capital)

Total Funding

$2.9B

Headquarters

London, United Kingdom

Founded

2016

Simplify Jobs

Simplify's Take

What believers are saying

  • Kraken spinoff at $8.65B valuation unlocks $1B funding for global SaaS expansion.
  • Uplight acquisition accesses 85 North American utilities and 8.5GW flexible load.
  • Bitong JV targets 140TWh renewable trading in China by 2030.

What critics are saying

  • Kraken spinoff erodes Octopus's tech edge as rivals EDF license independently.
  • Origin cuts FY26 EBITDA to -A$70M–+A$30M from UK gas charges and regulations.
  • China JV halts from Beijing spot market reversals within 18 months.

What makes Octopus Energy unique

  • Kraken platform manages 70 million accounts for EDF, E.ON, and Origin Energy.
  • Octopus Energy Generation oversees £6 billion renewable portfolio across Europe.
  • Kraken Flex uses AI for virtual power plants with 350,000 enrolled EVs.

Help us improve and share your feedback! Did you find this helpful?

Benefits

Health Insurance

Dental Insurance

Vision Insurance

Paid Vacation

401(k) Company Match

Parental Leave

Flexible Work Hours

Company Equity

OE Group Share Scheme

Growth & Insights and Company News

Headcount

6 month growth

-1%

1 year growth

-1%

2 year growth

0%
Business Wire
Mar 24th, 2026
Octopus Energy takes majority stake in Uplight to scale flexible grids across North America

Octopus Energy Group is acquiring a majority stake in Uplight, a North American grid flexibility provider, in partnership with Schneider Electric, which will remain a significant minority partner. The transaction is subject to regulatory approvals and expected to complete later this year. Uplight serves over 85 utilities across North America, including eight of the ten largest in the US, managing over 8.5 gigawatts of flexible load through demand response and distributed energy resource management solutions. The company will continue operating as an independent platform. The partnership combines Octopus Energy's consumer innovation and flexibility expertise, Uplight's utility relationships and technology, and Schneider Electric's grid management systems. Octopus Energy operates the world's largest virtual power plant with more than 350,000 electric vehicles enrolled globally.

Nikkei Asia
Mar 22nd, 2026
Britain needs China to build clean tech, says Octopus Energy CEO

Octopus Energy, Britain's leading renewables supplier, is pursuing partnerships with Chinese companies whilst expanding into Japan and South Korea. The company's chief executive cited China's superior expertise in clean technology as crucial for Britain's renewable energy development. The move comes as the firm seeks to diversify its operations and leverage Chinese know-how in the renewables sector. Octopus Energy is positioning itself for growth across Asian markets, balancing collaboration with Chinese expertise against expansion opportunities in other regional economies. The company's strategy reflects growing recognition of China's technological capabilities in clean energy, despite geopolitical tensions affecting international business relationships.

UKTN
Feb 16th, 2026
Octopus Energy invests $1B in California clean tech and solar projects

Octopus Energy is investing nearly $1 billion into California's clean technology sector through its Octopus Energy Generation subsidiary. The investments will target two carbon removal companies focused on grassland restoration and reforestation, plus a solar and battery project expected to be operational by July 2026. The move deepens the UK energy giant's presence in the US market, forming part of its broader $2 billion commitment to America's energy transition by 2030. Octopus Energy Generation chief executive Zoisa North-Bond cited California's supportive policies and Silicon Valley entrepreneurship as key factors behind the investment. The announcement came during California Governor Gavin Newsom's visit to Octopus Energy's London headquarters on Monday.

Yahoo Finance
Jan 30th, 2026
Octopus Energy enters China with PCG Power to trade 140TWh renewable electricity annually by 2030

Octopus Energy has entered China's clean energy market through a joint venture with PCG Power, announced during the UK Prime Minister's visit to China. The partnership will create Bitong Energy, focused on trading renewable electricity across China's expanding spot power markets. The venture combines PCG Power's position in China's commercial and industrial renewable sector with Octopus Energy's technology for real-time power trading and asset management. It will launch initially in Guangdong province before expanding nationwide. By 2030, Bitong Energy aims to trade up to 140 terawatt-hours of renewable electricity annually and targets annual profits of around £50 million. The partners expect the business to achieve a valuation exceeding £500 million within five years, making it one of Britain's most significant clean tech exports to Asia.

Kraken
Dec 30th, 2025
Kraken | Energy Technology Upgraded

Kraken optimizes green generation, helps manage the network, improves field operations and supports utilities in delivering excellent experiences for customers.

INACTIVE