Software Engineer (Full stack indicatively 50:50 - Mid-Senior Level)

Job Title: Software Engineer (Full stack indicatively 50:50 - Mid-Senior Level)

Position: Full Time

Reporting to: Lead Software Engineer (eCommerce)

Location: UK Hybrid (typically up to 1 day week in the Central London office)

Remuneration: £55k to £65k (based on level of experience)

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Company Profile

Segen was formed in 2004 and is the UK’s largest Wholesale Distributor of Solar PV, Energy Storage Systems and EV-charging. With a growing European and international focus Segen is now part of the Labora Group since 2021. Segen Group turnover is more than £300m and growing at over 50% per year so there has never been a better time to join the team. Our customer base consists of commercial and residential installation companies. Access to our unique on-line portal and design tool, plus our emphasis on product quality, consistency and availability sets us apart in the market. Segen is a fast-moving business that responds quickly to any market changes supported by its bespoke ERP system and database and team.

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Our Mission

We seek to be at the forefront of making a positive impact on the world. Our focus is providing Clean Technology to make the world a more sustainable place and every single transaction we make creates a brighter future. Join Segen for an opportunity to help change the world with every action you make. It’s fast paced, challenging, dynamic and incredibly rewarding, because changing the world isn’t easy!

Segen Group has a vibrant and well‑established in‑house Software Engineering capability, supported by specialist partners. Within eCommerce, we lead the definition, design, and engineering of new B2B experiences in how we sell and service our products. The services you build will be both customer‑facing and colleague‑facing, integrating deeply with Commercial, Finance, Warehouse, and Fulfilment systems across our wider estate.

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The Role

You are an accomplished mid to senior-level Software Engineer (full stack) and strong communicator, with deep expertise in building and scaling complex, composable solutions — ideally with experience developing eCommerce SaaS platforms (e.g., Shopify, BigCommerce, or commercetools) and leveraging AI and CICD within a collaborative development process.

You will develop software within an Agile squad to deliver a high‑performance, scalable solution that integrates front‑end systems with back‑end services to create seamless, powerful digital experiences for our customers and colleagues. You will work closely with senior Product and Engineering leaders and cross‑functional teams to ensure our platform meets both technical and business needs.

This is a high‑impact position where you will meaningfully contribute to the platform’s success in a dynamic, fast‑paced environment.

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Main Duties

• This is a hands‑on contributor role, designing, delivering, and supporting software for a complex, scalable, composable eCommerce platform leveraging SaaS/PaaS to serve business customers and colleagues across multiple geographic locations (based from the UK).
• Developing and integrating APIs, microservices, and third‑party solutions (e.g., ERP, PIM, CRM) to create a seamless customer experience.
• Ensuring high‑quality, maintainable code aligned with engineering best practices.
• Participating in collaborative code reviews, architecture discussions, and technical workshops.
• Working closely with Product Management, UX/UI Designers, eCommerce SaaS providers, and DevOps to ensure the platform meets business requirements and delivers a high‑quality user experience.
• Collaborating with stakeholders to understand customer‑specific workflows, journeys, and technical requirements.
• Implementing personalisation, catalogue management, pricing engines, and B2B‑specific capabilities such as complex order workflows, bulk ordering, and account‑based pricing.
• Ensuring platform scalability and reliability to support large volumes of data and transactions, with a strong focus on uptime and responsiveness.
• Implementing and maintaining high standards for security, data privacy, and compliance across all systems.
• Leading initiatives for process improvement, performance optimisation, and technical‑debt reduction.

Note: This job description is not exhaustive. The jobholder should be flexible in undertaking other reasonable duties to meet business needs.

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What We’re Looking For

You don’t need to tick every box, but strong candidates will demonstrate many of the following:

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Must‑haves:

• Extensive capability as a mid to senior level software engineer (full-stack development and testing) delivering complex digital products within a software development team (or equivalent) including CICD pipelines.
• Strong capability with Infrastructure As Code such as Terraform (Bicep is preferred)
• Strong understanding of API‑driven development, including RESTful APIs, GraphQL, and event‑driven architectures.
• Experience integrating with enterprise systems
• Excellent communication skills, with the ability to influence and adapt communication styles.
• A deeply customer‑focused and curious mindset, comfortable engaging directly with users.
• Capability to lead the technical delivery of complex initiatives, collaborating with cross‑functional partners to define the right outcomes.
• Ability to influence team direction, roadmap discussions, and decision‑making.

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Nice‑to‑haves:

• Expertise working with our technology stack: TypeScript, Node, Shopify Liquid, Bicep, Azure DevOps and Pipelines
• Experience with other modern front‑end frameworks (e.g., React, Vue.js) and backend technologies (e.g. Python, Ruby).
• Hands‑on experience with microservices architecture, serverless functions, and cloud infrastructure (Azure preferred, but AWS or GCP transferable).
• Interest in emerging technologies and AI‑assisted design/development workflows (e.g. Cursor).
• Complimentary skills in technical operations, security, user experience, software architecture, or Agile delivery.
• Knowledge and or experience within the photovoltaic industry

For clarity the role does not involve line managing other colleagues.

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What We Offer

• Competitive salary
• 25 days holiday (plus bank holidays)
• Pension
• Life Assurance
• Discounted company products
• Cycle to Work Scheme
• Electric Car scheme
• Career Development
• Employee Assistance Scheme
• Staff events and surprises
• A supportive and inclusive work environment with opportunities for professional development

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Inclusivity

Our differences make up a significant part of our strengths.

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At Segen, we seek an inclusive and diverse workplace where every individual feels valued, respected, and empowered to bring their authentic selves to work. We believe that diversity drives innovation and creativity, and we actively seek to build on our already inclusive culture. (#Actions not words)

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We encourage applications from candidates of all backgrounds, race, national or ethnic origin, colour, religion, age, sex, sexual orientation, gender identity or expression, marital status, family status, genetic characteristics, disability. If you need any adjustments during the application or interview process, please let us know.

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We are dedicated to creating equal opportunities for all, and we encourage candidates from underrepresented groups to apply.

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Work Location: In person