Senior Data Scientist

About Us: 

Solirius Reply, part of the Reply Group, delivers technical consultancy and application delivery to our clients in order to solve real world problems and allow our clients to respond to an ever-changing technical landscape. We partner closely with our clients, embedding our consultants into their businesses in order to provide a bespoke service, allowing us to truly understand our clients’ needs.

It is this close collaboration with our clients that has enabled us to grow rapidly in recent years and will drive our ambitious future growth plans. We currently have over 300 consultants working with a variety of key clients from both the public and private sectors such as the Ministry of Justice, Department for Education, FCDOS, UEFA, International Olympic Committee and Mercedes Benz; with plans to increase our client base further in the near future. 

We operate as a flat organisation and believe in trusting and supporting our team to operate independently. We pride ourselves on being specialists at what we do, making the most of our consultants’ expertise in their fields in order to provide a best-in-class service to our clients. All our consultants have the opportunity to work on a range of different projects, providing a broad range of knowledge on which to develop their careers and progress in the direction they choose.

About You:

You are a motivated and adaptable professional with a strong analytical mindset and a passion for using technology to solve real-world problems. You enjoy working in collaborative, agile teams and take pride in delivering high-quality solutions that make a tangible impact. With strong communication skills and a consultative approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. You understand and align with Solirius Reply Values.

The Role:
We are looking for an experienced Senior Data Scientist to join our team here at Solirius. You will be working as part of a team, developing and delivering exciting projects with a fantastic team of technology experts.
You will be responsible for designing, developing, and maintaining data pipelines and systems that enable data analysis and machine learning. You will also collaborate with data engineers, analysts, and other stakeholders to ensure data quality and reliability.

Requirements

Key Responsibilities:

• Lead end-to-end data science projects, from ideation and data exploration to model development and deployment.
• Build and optimise machine learning models for prediction, classification, recommendation, or segmentation.
• Collaborate with data engineers, product managers, analysts, and business stakeholders to translate complex problems into analytical solutions.
• Drive experimentation through A/B testing, causal inference, and other statistical methodologies.
• Present actionable insights and recommendations to senior leadership.
• Mentor junior data scientists and contribute to the growth of the data science function.
• Stay current with emerging tools, technologies, and best practices in data science and machine learning.
• Assist with defining the processes needed to achieve operational excellence
• Ensure data quality across all projects/clients
• Define and manage SLA’s for data sets and processes throughout production
• Lead on the design, build and launch of new data models and pipelines

Key Skills/Experience:

• Experience in data science or machine learning roles, preferably in a fast-paced tech or enterprise environment.
• Proficient in Python or R, SQL, and common machine learning frameworks (e.g., scikit-learn, TensorFlow, XGBoost, PyTorch).
• Strong foundation in statistics, probability, and hypothesis testing.
• Experience with cloud platforms (AWS, GCP, Azure) and big data tools (Spark, Hive, Databricks, etc.) is a plus.
• Excellent communication and storytelling skills with the ability to explain complex concepts to non-technical stakeholders.
• Proven track record of delivering impactful data science solutions in a business setting.

• Experience in operating as part of data engineering teams and independently.
• Line/Team management experience, leadership experience 
• SQL and relational databases (e.g. MS SQL/Azure SQL, PostgreSQL)
• You have framework experience within either Flask, Tornado or Django, Docker
• Experience working with ETL pipelines is desirable e.g. Luigi, Airflow or Argo
• Data acquisition and development of data sets and improving data quality
• Preparing data for predictive and prescriptive modelling
• Hands on coding experience, such as Python
• Reporting tools (e.g. Tableau, PowerBI, Qlik)
• GDPR and Government Service Standard (desirable)
• Experience working in an Agile development environment
• Data architecture experience.

Benefits

Package and Benefits:

• Competitive Salary
• Bonus Scheme
• Private Healthcare Insurance
• 25 Days Annual Leave + Bank Holidays
• Up to 10 days allocated for development training per year
• Enhanced Parental Leave
• Paid Fertility Leave (5 Days)
• Statutory & Contributory Pension
• EAP with Help@Hand
• Gym Membership Benefits
• Flexible Working
• Annual Away Days/Company Socials

Equality & Diversity:
Solirius Consulting is an equal opportunities employer. We are committed to creating a work environment that supports, celebrates, encourages, and respects all individuals and in which all processes are based on merit, competence and business needs. We do not discriminate on the basis of race, religion, gender, sexuality, age, disability, ethnicity, marital status or any other protected characteristics.
Should you require further assistance or require any reasonable adjustments be put in place to better support your application process, please do not hesitate to raise this with us.