Backend Python Developer – AWS (Energy Trading Platform) - CONTRACT in London

Backend Python Developer – AWS (Energy Trading Platform) - CONTRACT in London

London Freelance Home office (partial)
Harrington Starr

At a Glance

  • Tasks: Design and develop backend services using Python for a cutting-edge energy trading platform.
  • Company: Join a leading energy trading organisation in a dynamic London team.
  • Benefits: Competitive daily rate, hybrid working, and the chance to work on impactful projects.
  • Other info: Great opportunity for mid-to-senior developers looking for impactful contract work.
  • Why this job: Be part of a fast-paced environment that directly influences trading operations.
  • Qualifications: Hands-on Python experience and strong AWS skills required.

We’re working with a leading energy trading organisation that’s looking to hire a Backend Python Developer to join their London team, working on a modern, AWS-based post-trade platform. This is a hands-on contract role focused on backend development, supporting live intraday trading, position management and P&L reporting for a front-office energy trading environment. You’ll be part of a fast-moving engineering team building and enhancing business-critical systems used daily by trading and operations teams.

The role:

  • Design, develop and maintain backend services using Python
  • Build scalable, reliable and secure applications running on AWS
  • Contribute to a modern post-trade platform providing live intraday position and P&L reporting
  • Work closely with product, trading and technology teams to deliver new features
  • Propose and implement technical solutions to solve real business problems
  • Use and improve CI/CD pipelines to release functionality frequently
  • Produce high-level technical designs and ensure alignment with cloud, security and architectural standards
  • Collaborate with infrastructure, cloud and security teams as required

Key requirements:

  • Hands-on Python development experience (backend-focused)
  • Strong experience working with AWS in a production environment
  • Solid understanding of object-oriented programming
  • Experience building and consuming APIs (REST and/or GraphQL)
  • Familiarity with relational databases (Postgres preferred)
  • Experience working in Agile teams
  • Pragmatic, delivery-focused mindset

Nice to have:

  • Experience with AWS services such as S3, ECS, AppSync
  • Exposure to Kafka or other messaging systems
  • Frontend experience with React or Svelte
  • Background in commodities trading or financial services

Location & setup:

  • London-based
  • Hybrid working – typically 3 days onsite
  • Contract role within a long-running, business-critical programme

This is a strong opportunity for a mid-to-senior backend Python contractor who enjoys working close to the business on high-impact trading systems. Apply now or get in touch for a confidential discussion.

Backend Python Developer – AWS (Energy Trading Platform) - CONTRACT in London employer: Harrington Starr

Join a leading energy trading organisation in London as a Backend Python Developer, where you'll be part of a dynamic engineering team dedicated to enhancing critical systems for live intraday trading. With a hybrid working model and a focus on employee growth, this role offers competitive daily rates and the chance to work on innovative AWS-based solutions in a collaborative environment that values your contributions and expertise.

Harrington Starr

Contact Details:

Harrington Starr Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Backend Python Developer – AWS (Energy Trading Platform) - CONTRACT in London

Get Involved in Local Energy Groups

Dive into local energy-focused meetups or industry forums—often, these are where freelancers get noticed. Connect with professionals and companies that are looking for freelancers like us; it’s a great way to score projects by tapping into community needs!

Show Off Your Expertise with a Public Portfolio

Create an online portfolio highlighting your previous work in energy projects. Include case studies, past clients, and any innovative solutions you've provided. When potential clients see your skills, they're more likely to reach out with freelance opportunities.

Stay Updated on Regulations and Trends

Freelancing in the energy-utilities sector means we need to be on top of the latest regulations and industry trends. Subscribe to relevant newsletters or join industry forums to keep our knowledge fresh; this can make us more appealing to potential clients!

Tap into Online Freelancing Platforms

Don’t forget to leverage platforms like Upwork or Freelancer, which can be gold mines for energy projects. Make your profile stand out with keywords related to the energy sector, so those searching for experts find us easily!

We think you need these skills to ace Backend Python Developer – AWS (Energy Trading Platform) - CONTRACT in London

Python Development
AWS
Backend Development
API Development (REST and/or GraphQL)
Object-Oriented Programming
Relational Databases (Postgres preferred)
CI/CD Pipelines

Some tips for your application 🫡

Showcase Your Energy Knowledge:When you're applying for a freelance role in the energy and utilities sector, make sure your application highlights your understanding of current trends, regulations, and technologies. Reference any certifications or courses you've completed that are relevant to the industry. This shows that you not only have the skills but are also genuinely invested in the field.

Detail Your Freelance Experience:Since it's a freelance gig, it's crucial to illustrate your past freelance projects. Include a portfolio that showcases relevant work you've done within the energy and utilities sector. Focus on outcomes and the value you provided to previous clients – specific metrics or success stories can really catch attention!

Be Clear About Your Availability:In your application, be honest about your availability and the number of hours you can commit to the project with Harrington Starr. Freelancers often juggle multiple clients, so letting them know when you're free to start and how much time you can dedicate is key for setting expectations right from the start.

Express Your Passion for Sustainability:The energy sector is increasingly focused on sustainability, so make sure to weave your passion for eco-friendly practices into your application. If you’ve been involved in any initiatives, projects, or studies related to renewable energy, be sure to mention them and how they align with the mission of Harrington Starr. This will show that you share their vision!

How to prepare for a job interview at Harrington Starr

Showcase Your Expertise in Energy

Being in the energy-utilities sector means you should be ready to discuss industry trends, energy efficiency technologies, and sustainability practices. Let's make sure you can chat confidently about your previous projects or relevant work experiences that demonstrate your knowledge and skill set in this area.

Prepare Your Portfolio

As a freelancer, your portfolio is your best friend. Bring a strong collection of case studies or project summaries that demonstrate how you've tackled challenges in the energy field. Be prepared to talk about results you’ve achieved, as clients will want to see the impact of your work.

Brush Up on Technical Questions

Expect some technical questions relevant to the energy-utilities sector, like discussing renewable energy sources or efficiency evaluations. It’s a good idea to have a few key concepts and tools fresh in your mind, so you can show off your technical prowess without breaking a sweat.

Be Ready to Discuss Your Rates

Freelancing means talking numbers, so think about your rate and how it justifies the value you bring. Prepare to explain how you determine your pricing based on your experience, skills, and the complexity of projects you’ve worked on.