Software Engineering Manager - Flex

About ENSEK

ENSEK builds the cloud‑native SaaS software that’s transforming how energy retailers operate, innovate and manage at scale.

We help retailers lower operating costs, improve billing accuracy for consumers, and enhance customer experience through automation and AI‑driven insight, all underpinned by modern, cloud‑native architecture.

ENSEK is at an exciting inflection point as we scale at pace towards new international horizons. If you’re driven by solving complex, real‑world problems and want to build modern technology that accelerates the global energy transition, you’ll feel right at home with us.

Flex is a platform that makes every home or business with solar, batteries or EVs earn from them, while protecting the grid. It decides when batteries, EVs, solar panels and heat pumps charge, use their energy or export to the grid, so each device delivers as much value as possible.

Flex is central to ENSEK's growth strategy and a key differentiator in the market, and we're investing in both our product and our people. We're bringing teams together across the UK and Europe, so you'll help shape how we work as one team, alongside experienced engineering and product leaders, on a product with real strategic importance to the business.

About the role

We are looking for an experienced Engineering Manager to lead a team within Flex and help us build the right products in the right way. Reporting to the Engineering Director, you'll be responsible for creating a high-performing engineering environment where people can thrive, grow, and deliver meaningful outcomes for customers.

This is not a delivery management role. We're looking for a technically credible engineering leader who can coach engineers, challenge technical decisions, drive engineering quality, and partner closely with Product to shape solutions that solve real customer problems.

You'll lead a team of around 7-8 engineers and work closely with the Flex Product Director, fellow Engineering Managers, Staff Engineers, and the wider leadership team. You'll play a key role in strengthening the partnership between Engineering and Product, ensuring teams remain focused on delivering commercially valuable outcomes rather than simply shipping features.

As the Flex and DSR organisations continue to integrate, you'll also help shape the future team model and contribute to the growth and evolution of the wider engineering organisation.

Success in this role will be measured through the health and development of your team, sustained delivery performance, strong product partnership, and your contribution to building an effective engineering organisation that can support Flex's continued growth.

Key responsibilities:

• Team Leadership: hiring exceptional talent, developing engineers through meaningful 1:1s, coaching and career pathways, and creating a culture of ownership, accountability and high standards.

• Delivery & Planning : Drive clarity and predictability. Own sprint planning, backlog prioritisation and execution in partnership with Product, ensuring the team consistently delivers valuable, high‑quality features and fixes at pace.

• Engineering Excellence: Raise the engineering bar. Champion best‑in‑class design, testing, code review and CI/CD practices to ensure the team ships maintainable, dependable and well‑engineered software.

• Technical Ownership: Provide strong technical leadership. Shape architectural decisions, make pragmatic trade‑offs, and partner with architects and SRE to build scalable, secure and observable systems.

• Cross‑Functional Collaboration: Work seamlessly with Product, UX, Data and SRE to align on priorities, define clear acceptance criteria and coordinate smooth, confident releases.

• Operational Responsibility: Ensure operational excellence. Support on‑call readiness, lead blameless post‑incident reviews, strengthen runbooks, monitoring and alerting, and embed SLIs/SLOs for the services your team owns.

• Continuous Improvement: Remove friction, automate manual processes, embed learning loops, and foster a culture where experimentation, improvement and innovation are the norm

Key outcomes:

• High‑performing team: Engineers are engaged, growing and delivering predictable outcomes against roadmap commitments.

• Reliable product delivery: Features are delivered with high quality, appropriate test coverage and minimal production incidents.

• Operationally robust services: Services meet agreed SLAs/SLOs with clear dashboards, playbooks and reduced MTTD/MTTR.

• Strong cross‑team alignment: Close partnership with Product and SRE results in faster, lower‑risk launches and improved customer outcomes.

Experience required:

• Proven engineering management experience: 3+ years managing engineers with a track record of hiring, coaching and developing teams.

• Software delivery at scale: Experience shipping production microservices or cloud‑native applications using public cloud (AWS preferred).

• DevOps & CI/CD: Practical understanding of automated pipelines, Infrastructure as Code and container orchestration (Kubernetes or equivalent).

• Quality & testing: Experience driving test strategy, automated testing and code quality initiatives.

• Observability & incident response: Familiar with monitoring, logging and incident management practices to support reliable operations.

• Stakeholder management: Strong communicator able to influence across product, design, SRE and senior leadership.

• Technical background: Strong coding experience in at least one modern language (e.g. Java, Kotlin, Python, Go, C#) and familiarity with system design and architecture patterns.

Company Benefits

• 25 days’ holiday + bank holidays

• Option to buy or sell 5 extra annual leave days per year

• Vitality Health Insurance, including private healthcare, virtual GP access, mental‑health support and wellbeing perks (50% off gym memberships -Virgin Active, Nuffield, PureGym)

• Pension with 5% matched contribution

• Regular team‑wide and company‑wide events

• 2 volunteering days per year to give back

• Remote‑first working environment with offices in London and Nottingham