Lead back end engineer Work, Jobs in Hemel Hempstead (with Salaries)

Lead Engineer (Back-End)
TransitionZero —London
- £87,000 - £95,000 a year
- Hybrid work
- DevOps
- Team management
Quick apply
Back-end Engineer (Senior)
Xe —London
- Full-time
- SQL
- AI
- Leadership
- Employee stock purchase plan
- Annual leave
Quick apply
Lead Back End Engineer
mkodo Ltd —London
- Mentoring
- Communication skills
- Life insurance
- Referral programme
Back-end Engineer
Magentic —London
- £125,000 - £140,000 a year
- Full-time
- Hybrid work
- ERP systems
- Master's degree
- AI
Lead Software Engineer
Searchland —London
- £95,000 - £110,000 a year
- Hybrid work
- Mentoring
- AI
- Leadership
Quick apply
Software Engineer
Blackhawk Network —Hemel Hempstead
- Full-time
- Computer Science
- Java
- AWS
- Annual leave
- Employee assistance programme
Lead Machine Learning Research Engineer
Blankstate —London
- £95,000 - £140,000 a year
- Full-time
- Research
- Machine learning
- Leadership
Quick apply
Senior II - Back-End Engineer
Preply —London
- Full-time
- Hybrid work
- Java
- Continuous improvement
- Mentoring
Quick apply
Head of Technology – EV Systems & Solutions
SWARCO —Hemel Hempstead
- £80,000 - £90,000 a year
- Full-time
- Hybrid work
- Computer Science
- AI
- Leadership
- Annual leave
- Employee assistance programme
Quick apply
Back-End Software Engineer (Mid)
Xe —London
- Full-time
- SQL
- AI
- Communication skills
- Employee stock purchase plan
- Annual leave
Quick apply
SDET (Front End)
National Westminster Bank PLC —London
- £75,520 - £113,280 a year
- Full-time
- Hybrid work
- Software development
- Agile
- Annual leave
2d
Senior Software Engineer (Back End)
TP ICAP —London
- Full-time
- Mentoring
- AI
- SDLC
Lead Engineer
Ten Group —London
- Full-time
- Hybrid work
- Databases
- Team management
- Training & development
- Annual leave
- Employee discount
Quick apply
Dispatcher Supervisor
InPost UK —Hemel Hempstead
- Hybrid work
- Continuous improvement
- Team management
- Leadership
- Annual leave
Quick apply
Tech Lead
Log my Care —London
- £90,000 - £100,000 a year
- AI
- Leadership
Back End Engineer
Thought Machine —London
- Full-time
- Hybrid work
- Databases
- AWS
- Flexible schedule
- Life insurance
Software Engineer
ELMOgroup —London
- Hybrid work
- AWS
- Quality control
- Mentoring
- Employee assistance programme
- Employee discount
Financial Services Manager - Financial Systems
BAM UK & Ireland —Hemel Hempstead
- Continuous improvement
- Communication skills
6d
Lead ML Engineer / Scientist
Wise —London
- £90,500 - £127,000 a year
- Full-time
- Hybrid work
- Java
- Machine learning
- Communication skills
Quick apply
Staff Back-end Engineer
Preply —London
- Full-time
- Hybrid work
- Continuous improvement
- APIs
- Python
Quick apply

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Lead Engineer (Back-End)

TransitionZero
London

Quick apply

Job details

£87,000 - £95,000 a year

Qualifications

CI/CD
Cloud infrastructure
Stakeholder collaboration
IT team management
DevOps
Mentoring junior staff
NumPy
Microservices
Pandas
CI/CD pipelines
Team management
Terraform
Back-end development
Scrum
Professional development mentoring
Multidisciplinary collaboration
Technical roadmaps
DevOps implementation
Infrastructure provisioning automation
Terraform provisioning

Full job description

About the Role

We are looking for an experienced Lead Engineer (back-end) to lead the team building and scaling the infrastructure behind Scenario Builder, our electricity grid modelling platform. Scenario Builder is an in-browser platform that currently provides capacity expansion and dispatch modelling through an accessible no-code interface. The vision for Scenario Builder is to expand into power flow modelling to create a fully integrated grid modelling platform with the features and functionality needed to enable users to develop bankable scenarios that support energy investment decisions.

You will line-manage a small team of engineers while remaining a highly active individual contributor. You will own the technical shape of engineering work on the back-end team — leading planning, architecture, and code quality. You will work closely with the wider product and engineering team to design, develop, and maintain the back-end services that power our platform.

This hybrid role is based out of our London office near Waterloo Station and reports to the Head of Platform.

Responsibilities

Back-end development & architecture

Design, develop, and maintain scalable back-end services and APIs using Python and modern frameworks (FastAPI).
Design and build high-performance API endpoints to handle complex hierarchical data queries and multi-dimensional aggregations for grid modelling computations
Ensure system reliability, performance, and security through best practices in code quality, testing, and monitoring.
Collaborate with front-end engineers to design and implement RESTful APIs that support our web application.
Collaborate with data engineers and domain experts on the evolving core data model

Infrastructure & DevOps

Manage and optimise cloud infrastructure (GCP) to support our computational workloads.
Implement and maintain CI/CD pipelines to enable rapid, reliable deployments.
Monitor system health and performance, proactively identifying and resolving issues.
Implement and maintain infrastructure-as-code

Technical leadership & collaboration

Participate and lead in code reviews, architectural discussions, and technical planning sessions.
Own technical planning: break down roadmap items into well-scoped engineering work, lead estimation, and drive architectural decision records (ADRs).
Collaborate with cross-functional teams, including product, data engineering, and modelling, to deliver impactful features.
Set and uphold the team's technical standards — code quality, testing strategy, API design — through direct example and code review.

People & line management

Line-manage a team of 3–5 engineers: run regular 1:1s, support career development, and provide timely, constructive feedback.
Partner with the Head of Platform on performance reviews and personal development plans.
Act as the first point of escalation for day-to-day technical blockers

About You

You should have a long-term commitment to advancing the energy transition and be driven to build robust, scalable systems that power our grid modelling platform. Passionate about creating highly performant back-end services, you understand the technical challenges associated with building niche B2B products that handle complex computational workloads. In addition to seeking out people with a proactive, problem-solving attitude and an eye for detail, as a growing organisation, collegiality and empathy for our coworkers are a requisite. While we are a rapidly growing tech startup, we are also a non-profit, so a high level of adaptability and willingness to approach challenges with creativity and curiosity is essential.

Skills & Experience

Essential

7+ years of experience in back-end software development, with strong proficiency in Python.
Experience designing and building RESTful APIs and microservices architectures.
Strong understanding of database technologies (PostgreSQL, Redis, Firestore), ORMs and data modelling principles.
Experience with cloud platforms (preferably GCP) and containerisation technologies (Docker).
Solid understanding of software engineering best practices, including testing, code review, and documentation.
Excellent problem-solving skills and ability to work independently on complex technical challenges.
Experience line managing or formally mentoring engineers, with confidence running 1:1s and supporting career development.
Understanding of OAuth and web security best practices.
Experience with AGILE/Scrum based ways-of-working

Desirable

Experience in the energy sector or with computational modelling/simulation software.
Familiarity with scientific computing libraries (NumPy, Pandas) and optimisation frameworks.
Experience with generative AI/LLMs in applied engineering contexts
Experience with infrastructure-as-code tools (Terraform, Terragrunt) and GitOps practices.

About us

TransitionZero is a climate tech non-profit founded in 2021. TransitionZero builds software to reduce the time to build clean energy at scale. We pioneer open-access and open-source tools that make electricity system modelling more transparent, accessible, and actionable for governments, financiers and grid operators worldwide.

Our flagship tool, Scenario Builder, enables policymakers, planners and investors to rapidly build, analyse and share energy system and electricity grid models without coding expertise or external consultants. Supported by model-ready datasets, training and market insights, our tools strengthen in-house capacity and support resilient, affordable and locally-led energy transitions.

Quick apply

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