Senior Machine Learning Engineer, GB Group
Identity verification and fraud prevention solutions
Open for applications
Identity verification and fraud prevention solutions
1001+ employees
Open for applications
1001+ employees
Company mission
To ensure more genuine people have digital access to opportunities, and businesses have access to more genuine people.
Role
Who you are
- Bachelor’s degree or higher in Computer Science, Electrical Engineering, or a related field or equivalent experience
- Strong hands‑on experience developing and deploying machine learning models in production environments
- Advanced understanding of supervised, unsupervised, and semi‑supervised learning techniques
- Expertise in classification, regression, clustering, and anomaly detection
- Solid experience with convolutional neural networks, recurrent neural networks, and transformer‑based models
- Strong proficiency in Python (C++ is a plus) and PyTorch (TensorFlow is a plus)
- Hands-on experience with modern neural network architectures and loss functions across tasks such as object detection, image segmentation, and representation learning
- Experience using computer vision and scientific computing libraries such as OpenCV
- Familiarity with model deployment, monitoring, and CI/CD workflows
- Beneficial to have experience working with large‑scale datasets and performance‑critical ML systems
- Prior experience mentoring or technically guiding other ML engineers
- Beneficial to have exposure to production MLOps practices and model lifecycle management
- Able to balances research‑driven exploration with pragmatic, production‑focused execution
What the job involves
- The Senior Machine Learning Engineer is a senior individual contributor responsible for designing, developing, deploying, and continuously improving machine learning and computer vision models that power production‑grade systems
- This role combines strong hands‑on technical execution with mentorship, collaboration, and data‑driven problem solving
- Operating within an Agile environment, the Senior ML Engineer works closely with the machine learning team and cross‑functional partners to translate product requirements into robust ML solutions
- The role requires deep expertise in modern ML and computer vision techniques, experience operating models in production, and the ability to guide junior engineers through the full ML lifecycle while driving measurable improvements in model performance and product quality
- Technical Development & Innovation
- Design, implement, and optimize state‑of‑the‑art machine learning and computer vision models to enhance product capabilities
- Research, evaluate, and apply modern architectures and techniques, including CNNs, transformers, and vision‑language models
- Implement and benchmark newly developed algorithms on large‑scale datasets, validating both accuracy and throughput
- Fine‑tune large‑scale models using efficient adaptation techniques such as LoRA and QLoRA
- Model Evaluation & Data Analysis
- Define, implement, and monitor appropriate evaluation metrics (e.g., precision, recall, ROC‑AUC, confusion matrices)
- Analyze training, test, and production data using statistical and visual techniques to identify performance gaps and reliability risks
- Propose and implement data‑driven enhancements to model accuracy, robustness, and system stability
- Production Deployment & MLOps
- Support end‑to‑end ML workflows, including data preparation, training, deployment, monitoring, and iterative improvement
- Contribute to CI/CD pipelines and production monitoring to ensure reliable, reproducible, and scalable model delivery
- Assist in diagnosing and resolving model performance regressions and production issues
- Mentorship & Team Contribution
- Mentor and support junior CVML engineers across all phases of ML projects, including planning, data collection, annotation, training, deployment, and iteration
- Participate in design reviews, technical discussions, and knowledge‑sharing initiatives to raise overall team capability
- Contribute actively to Agile ceremonies and collaborative problem‑solving efforts
- Continuous Improvement & Collaboration
- Proactively suggest improvements to existing models, workflows, tools, and product features
- Collaborate effectively with engineering, product, and data stakeholders to deliver high‑impact ML solutions
- Maintain awareness of emerging ML and computer vision trends and assess their applicability to real‑world problems
Our take
Founded in 1989 as a mailing system in Cheshire, GB Group became an information management company before several acquisitions and name changes led it full circle back to operations under GB Group - or GBG. Now valued at $706M, the company created an international identity verification service that is its current leading product.
With 21 countries under its wing and companies such as IBM and HSBC using its services, GBG simplifies employee onboarding, cyber security, and personal data protection with a friction-free digital platform.
With international revenues steadily growing, GBG managed to navigate the market from acquired startup to company-acquiring global leader. However, the rocky economic climate in the UK has led to GBG's purchase by US private equity firm GTCR in September 2022, a growing trend among foreign companies in the UK tech industry. Since then, however, GBG has gone on to win contracts with award-winning companies like Shoplazza, indicating that it has retained its momentum post-acquisition and is ready to continue upwards.
Freddie
Company Specialist at Welcome to the Jungle
Insights
0% employee growth in 12 months
Company
Leadership
Dev Dhiman
(CEO)Dev has been with GBG since 2020, initially joining as a Managing Director of Asia Pacific before becoming CEO in 2024. They previously spent 12 years at Experian in various Directorial roles and 3 years at Deloitte UK as a Senior Associate and Assistant Manager.
David Ward
(CFO)Prior to joining GBG in 2021, David spent over 10 years at AVEVA as Head of Finance, CFO and Finance Director & Company Secretary. He was also an Senior Assurance Manager for over 13 years at EY.
James Gothard
(COO)James joined GBG in 2025 as the Chief Strategy Officer, he moved into the role of Chief Operating Officer in 2026. Prior to GBG, he spent 20 years at Experian in various roles, including GM of Credit Services & Strategy, South East Asia.
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