Senior Full Stack Software Engineer

MFK Recruitment; Greater London; Hybrid; GBP 85,000 - 105,000; Full time

Benefits offered by this job

Remote work

Occasional Mayfair office visits

Job summary

MFK Recruitment is helping a UK energy-tech client hire a Senior Full Stack Engineer.

The role is remote with occasional visits to the Mayfair office. You’ll own frontend and backend development using React, TypeScript, Python, APIs and databases, turning complex energy workflows into scalable products.

You’ll set engineering direction, influence architecture, and collaborate with product and data teams as the business grows.

Qualifications

• Strong commercial experience across frontend and backend engineering.
• Excellent React and TypeScript capability.
• Strong backend development experience, ideally Python.
• Experience with APIs, databases, SQL, and system integrations.
• Track record of leading projects or owning major technical workstreams.
• Experience building customer-facing software from scratch.
• Strong product instincts and autonomous work.
• Excellent communication with stakeholders.
• Positive, proactive, collaborative attitude.

Responsibilities

• Lead the development of customer-facing products from concept to production.
• Build modern frontend apps using React and TypeScript.
• Design and develop backend services, APIs, integrations, and business logic.
• Work with Python, SQL, databases, and data platforms.
• Own architecture, technical decisions, and engineering standards.
• Turn complex energy data into clear, scalable product experiences.
• Collaborate with product, data, leadership, and external partners.
• Build a scalable and maintainable codebase from scratch.
• Help shape the future engineering team and technical direction.

Skills

React

TypeScript

Python

APIs

Databases

Data platforms

Leadership

Communication

Collaboration

Product thinking

Job description

Senior Full Stack Engineer

£85,000 to £105,000

Permanent

Remote, with occasional London office visits

The opportunity

Our client is hiring a Senior Full Stack Engineer to take ownership of building the next generation of customer-facing software in the energy market.

The business operates in a complex, high-value sector and is using technology, data, and strong product thinking to modernise an industry that has historically been underserved by great software.

We have already recruited 4 people into the business, and all 4 are still there. We know the company and team well and are pleased to be supporting them again on this important hire.

This is a genuinely high-impact opportunity for an experienced engineer who is equally comfortable across frontend and backend development. You will take the lead on building new products and developing the codebase, with significant autonomy over technical decisions, architecture, and delivery.

The position can be fully remote, although the business would welcome occasional visits to its Mayfair office for collaboration and team time.

The role

This is a true full stack position.

They need someone strong in React and TypeScript who can build polished, reliable customer-facing software, but who is equally capable of contributing across backend services, APIs, application logic, databases, and data-rich workflows.

The platform supports complex energy processes across areas such as billing, metering, consumption, reporting, and asset performance. You will be responsible for taking those workflows and turning them into clear, scalable products that customers genuinely value.

Initially, you will lead much of the engineering work independently. You will not, however, be expected to operate without support. The business can provide access to external engineering expertise and additional coding support where needed as the platform and codebase develop.

This role offers genuine autonomy. You will have the freedom to make sensible technical decisions, shape engineering standards, and influence how the product evolves as the company grows.

What you will be doing

• Leading the development of customer-facing products from initial concept through to production
• Building modern frontend applications using React and TypeScript
• Designing and developing backend services, APIs, integrations, and application logic
• Working with Python, SQL, databases, and data platforms
• Taking ownership of architecture, technical decisions, and engineering standards
• Turning complex energy and operational data into clear, intuitive product experiences
• Working closely with product, data, leadership, and external engineering partners
• Building a scalable and maintainable codebase from the ground up
• Helping define the future engineering team and technical direction as the business expands

What they are looking for

• Strong commercial experience across both frontend and backend engineering
• Excellent React and TypeScript capability
• Strong backend development experience, ideally including Python
• Good experience with APIs, databases, SQL, and system integrations
• A track record of leading projects or taking ownership of major technical workstreams
• Experience building customer-facing software from scratch
• Strong product instincts and the ability to think beyond individual tickets
• Confidence making technical decisions and working with a high level of autonomy
• Excellent communication skills and the ability to work closely with technical and non-technical stakeholders
• Personality and attitude are particularly important. They want someone positive, proactive, collaborative, and genuinely enthusiastic about building great software. The right person will bring energy to the team, take responsibility, and approach challenges with a practical and constructive mindset.

Nice to have

• Startup or scale-up experience
• Energy, utilities, trading, sustainability, or fintech experience
• Data visualisation experience
• Experience working with Databricks or similar data platforms
• Experience using AI-assisted development tools
• Previous involvement in shaping engineering teams, standards, or architecture

Why join

• A salary of £85,000 to £105,000 + Bonus
• The flexibility to work remotely
• Occasional collaboration from the Mayfair office
• Real autonomy over what gets built and how it is delivered
• The opportunity to lead a major product and codebase from an early stage
• Direct influence over product and technical direction
• Support from external engineering resources when required
• Broad exposure across frontend, backend, data, architecture, and product
• Long-term scope to help build and shape the engineering function
• A growing business operating in a complex and important energy market

Summary

This is an excellent opportunity for a Senior Full Stack Engineer who wants meaningful ownership rather than simply maintaining an established platform.

You will lead the development of customer-facing software, work across React, TypeScript, Python, APIs, databases, and data-rich systems, and have the autonomy to shape the technical direction of a growing energy business.

They are looking for someone technically strong, but equally importantly, someone with an excellent attitude who is positive, engaging, and excited by the opportunity to build.