Senior Software Developer (PYTHON/AWS/REACT) - Health tech - tech for good, make a positive impact on the world

Highly successful and fast growing organisation has an exciting opportunity for a Senior Software Developer (PYTHON/AWS/REACT).

They are looking for a talented individual who will design, implement, and maintain their publishing software, systems, and customer-facing digital products.

Requirements

• Design and implement systems and software to meet requirements using appropriate tools and methods.
• Promote the creation of high-quality code by commitment to practices such as test-driven development, pair programming and code review.
• Be responsible for the technical development of all stages of software creation, including testing; ensure that implementation meets security, performance, and safety requirements.
• Suggest improvements to the code base, development processes, tooling and working practices. Encourage innovation by identifying, evaluating and adoption of emerging technologies.
• Assist with the design, implementation, and testing of APIs that adhere to the Open API specification

Knowledge & Skills for this job

• Able to demonstrate commercial software development experience.
• Practical experience in system design, development, testing and operational stability.
• Deep knowledge and experience in Python and its ecosystem, patterns and pitfalls.
• Experience applying continuous delivery, test driven development and pair programming.
• Experience of working in an agile environment and an understanding of Scrum principles in particular.
• Experience writing and consuming RESTful APIs in Python.
• Experience with AWS services (Lambda, DynamoDB, ElasticSearch).
• Experience with creating web application UIs using ReactJS and with TypeScript

The Directorate

This role will work closely with our Head of Engineering, Head of Data Science, QA Manager, Lead Software Developers, Software Developers and Chief Technology Officer.

The Team

As well as the above teams, you will be working across the organisation. We are welcoming someone who sees opportunities, is proactive and energetic wanting to make a difference to the way we work and the way we support our members.

Excellent opportunity to positively impact patient safety whilst working on complex, challenging and career defining projects.

Basic salary £68,000 - 70,000 + excellent benefits

Hybrid role - between 4 - 8 days per month in the London office, the rest remote

This is an excellent opportunity to be one of the key people involved in governing digital and marketing platforms and roadmap across the organisation. As part of the Corporate Technology Architecture team, your role is to guide, advise, and recommend how our digital landscape evolves over the coming years and support the delivery teams offering outstanding solutions.

Role Overview:

We are looking for a seasoned AWS Solution Architect with over 10 years of experience in designing and delivering robust, scalable, and secure cloud solutions. The ideal candidate should have deep technical expertise across a broad range of AWS services, with a strong focus on data integration, serverless computing, enterprise search, and secure web hosting. This role is critical in shaping our cloud architecture strategy and ensuring alignment with business goals.

Key Responsibilities:

• Solution Architecture and implement solutions using AWS Glue, Lambda, API Gateway, and Kafka for both real-time and batch data processing.
• Design and deploy enterprise search platforms such as Elasticsearch to support scalable and efficient data discovery.
• Lead the development and hosting of web applications on AWS, ensuring high availability, performance, and cost-efficiency.
• Define and implement security architectures, including WAF (Web Application Firewall) policies and CDN caching strategies (e.g., CloudFront).
• Collaborate with cross-functional teams to ensure cloud solutions meet security, compliance, and operational requirements.
• Conduct architecture reviews, performance tuning, and cost optimisation exercises.
• Document architectural decisions, patterns, and best practices.
• Work with Business Stakeholders, Product Owners, Business Analysts to understand functional and non-functional requirements and interact with other cross-functional teams.
• Contribute to Customer’s digital marketing strategies based on industry best practices.
• Help project team to size & estimate project implementation and identify resources and skillset needed for delivery of solution.

Required Skills & Experience:

• 10+ years of experience in cloud architecture, with a strong focus on AWS.
• Hands-on expertise with AWS Glue, Lambda, API Gateway, Kafka.
• Experience with Elasticsearch or similar enterprise search technologies.
• Proficiency in CloudFront, WAF, and other AWS security services.
• Experience hosting and scaling websites using AWS (e.g., S3, EC2, ECS, Amplify).
• Strong understanding of cloud security, IAM, and compliance frameworks.
• Experience with CI/CD pipelines and Infrastructure as Code (e.g., CloudFormation, Terraform).
• Excellent communication and stakeholder engagement skills.

Preferred Qualifications:

• AWS Certified Solutions Architect - Professional (preferred but not mandatory).
• Experience in enterprise-scale environments or regulated industries.
• Familiarity with observability tools (e.g., CloudWatch, Datadog).

Personal skills and capabilities

• Strong verbal and written communication skills, with the ability to communicate technical information to non-technical partners and to listen to identified concerns and adapt accordingly.
• Ability to influence across multiple functions (technical and non-technical)
• Quick Leader: Should understand the new implementation patterns and adapt.
• A continuous desire and willingness to learn and develop your current knowledge and abilities.
• Flexible in approach, adapting plans and strategies to help handle risks around ambiguity.
• Problem solver with a strong intuition for business and proficient in current technological trends and business concepts

Career Stage:
Manager

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Senior Site Reliability Engineer (Observability) Location: London/UK (Remote) Contract: 12 Months Initial Day rate : £55 Per Hour - £62 Per Hour Inside IR35 Job Overview We are looking for a Senior Site Reliability Engineer with strong experience in Observability, Monitoring and Distributed Systems to support large-scale cloud infrastructure supporting millions of devices globally. The role focuses on building and scaling monitoring, logging and alerting platforms to ensure high availability and performance of cloud services. Responsibilities Design, deploy and scale observability platforms Manage and scale Prometheus monitoring systems Deploy and maintain large Elasticsearch clusters Build and maintain data pipelines using Kafka Develop alerting and monitoring frameworks Automate infrastructure using Terraform and Ansible Develop tools and scripts using Python, Go, Ruby or Bash Work with Linux systems (Debian/Ubuntu) Participate in on-call rotation Improve system reliability, performance and scalabilityRequired Skills 5+ years experience in Site Reliability Engineering / DevOps Strong Linux systems experience Observability and Monitoring tools experience Prometheus, Grafana, ELK Stack (Elasticsearch, Logstash, Kibana) Kafka Terraform / Infrastructure as Code Ansible / Configuration Management Programming experience (Python, Go, Ruby or Bash) Distributed systems and cloud infrastructure experienceThis is an urgent vacancy where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your CV or send it khushboo. pandey @ randstad. Co. uk Randstad Technologies is acting as an Employment Business in relation to this vacancy

Senior Site Reliability Engineer (Observability)

Location: London/UK (Remote)

Contract: 12 Months Initial

Day rate : 55 Per Hour - 62 Per Hour Inside IR35

Job Overview

We are looking for a Senior Site Reliability Engineer with strong experience in Observability, Monitoring and Distributed Systems to support large-scale cloud infrastructure supporting millions of devices globally. The role focuses on building and scaling monitoring, logging and alerting platforms to ensure high availability and performance of cloud services.

Responsibilities

• Design, deploy and scale observability platforms
• Manage and scale Prometheus monitoring systems
• Deploy and maintain large Elasticsearch clusters
• Build and maintain data pipelines using Kafka
• Develop alerting and monitoring frameworks
• Automate infrastructure using Terraform and Ansible
• Develop tools and scripts using Python, Go, Ruby or Bash
• Work with Linux systems (Debian/Ubuntu)
• Participate in on-call rotation
• Improve system reliability, performance and scalability

Required Skills

• 5+ years experience in Site Reliability Engineering / DevOps
• Strong Linux systems experience
• Observability and Monitoring tools experience
• Prometheus, Grafana, ELK Stack (Elasticsearch, Logstash, Kibana)
• Kafka
• Terraform / Infrastructure as Code
• Ansible / Configuration Management
• Programming experience (Python, Go, Ruby or Bash)
• Distributed systems and cloud infrastructure experience

This is an urgent vacancy where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your CV or send it khushboo. Co. uk

Randstad Technologies is acting as an Employment Business in relation to this vacancy.

Location: London
Type: Permanent
Working Pattern: 4xFlex, 37.5 hours per week

We are currently working with a client in the Aerospace & Defence sector who are expanding their London-based team and are looking to hire Software Engineers (Java/AWS) at mid to lead level.

This opportunity sits across a range of Defence, Cyber and Intelligence programmes, focused on developing secure, cloud-based solutions within mission-critical environments.

A key requirement for this position is the ability to obtain and maintain high-level security clearance. If you do not currently hold this, support will be provided throughout the application process.

The Role:

You will work under the guidance of a Software Engineering Lead or, at senior level, take on additional responsibility for technical delivery and supporting wider engineering activities. You may specialise in a particular area or work across multiple disciplines, with a strong focus on the Cyber domain.

Typical responsibilities include:

Conducting software development activities and contributing to technical delivery
Designing and developing tests to debug and validate software
Working with customer requirements to develop mission/business applications
Supporting the full software development lifecycle using appropriate tools, standards and processes
Analysing system capabilities and resolving technical queries
Correcting program errors and maintaining documentation
Preparing operating instructions and technical documentation
Championing automation through Infrastructure as Code (IaC), CI/CD and test automation
Skills & Experience:

Strong proficiency in Java
Knowledge of additional languages such as Python, C++, JavaScript, TypeScript or React (desirable)
Experience developing software for cloud environments, particularly AWS
Understanding of microservices and/or serverless architectures
Familiarity with CI/CD pipelines for cloud deployments
Awareness of challenges when migrating on-premise workloads to the cloud
Knowledge of AWS services such as EC2, EKS, Fargate, IAM, S3 and Lambda
Experience working in Linux environments
Understanding of unit testing and mocking frameworks (e.g. JUnit 5)
Experience with Git version control
Knowledge of Agile development methodologies (SCRUM)
Understanding of relational databases (e.g. Oracle) and/or MongoDB
Familiarity with GitLab CI/CD pipelines
Experience using Atlassian tools (Bitbucket, Jira, Confluence)
Understanding of Elasticsearch, Kibana and Hibernate
Desirable Certifications:

Oracle Java Certification / AWS Certification / ISTQB Certification / OSCP Certification / CCNA Certification

PLEASE NOTE: eDV clearance is required to start. The process can take up to 18 months

Omega is an employment agency specialising in opportunities at all levels within the Engineering, Manufacturing, Aerospace, Automotive, Electronics, Defence, Scientific, Energy & Renewables and Tech sectors