1 to 25 of 38 Unit Testing Jobs in London

Senior Quantitative Developer

Hiring Organisation
Centrica - CHP
Location
Hayes, London, United Kingdom
Employment Type
Permanent
quality increments to the team's model library - working both individually and collaboratively. Providing leadership in areas such as object modelling & interface design, automated testing & refactoring and performance optimisation. Provide support to Trading & Origination on model usage and behaviour. Leverage the teams cross-asset expertise to connect business locations … mathematics or other quantitative subject. Solid experience of code development in Python, including: Experience developing in an Agile environment Use of math/stats & testing libraries, as well as modern build tools. Ability to refactor code and work effectively with legacy systems. Knowledge of Object Orientation, Software Architecture ...

Lead MuleSoft Developer

Hiring Organisation
Alexander Edward James Consulting Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
premises environments. Oversee the development and governance of APIs, documentation, and reusable assets within Anypoint Exchange. Establish and enforce best practices for unit testing using MUnit, ensuring high test coverage and quality standards. Lead deployment strategies and contribute to the design and optimisation of CI/CD pipelines. … Azure). Deep understanding and hands-on experience implementing security protocols such as OAuth 2.0, JWT, and SSL/TLS. Proven experience leading unit testing practices using MUnit and contributing to mature CI/CD pipelines. MuleSoft Certified Developer Level 1 minimum (Level 2 or Architect certifications advantageous ...

Principal Oracle Business Systems Analyst (Order Management & Pricing)

Hiring Organisation
Entrust
Location
London Area, United Kingdom
Delivery Ownership Lead and contribute to sprint planning, backlog prioritization, and roadmap development aligned with business objectives. Develop and execute comprehensive test plans, including unit testing, system testing, and UAT. Drive end‐to‐end solution delivery, including configuration, testing, deployment, and post‐go‐live support. Play … role in Oracle upgrades, quarterly releases, and patch cycles, including regression testing and change management. Operational Excellence & Support Provide post‐implementation support, troubleshoot issues, and ensure system stability and performance. Act as a senior escalation point for complex issues, cross‐functional problem resolution, and enhancement identification. Ensure adherence ...

Principal Consultant – Service Now Tech Lead

Hiring Organisation
STACKSTUDIO DIGITAL LTD
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
enhancements and bug fixes to full application suite deployment. Carry out agile sprint-defined development tasks to support release cycles, including execution of development, unit testing, functional testing, and overall peer review of team member work. Reviews design and code per sprint to ensure quality. Creation … ServiceNow Developers Stay current with new and updated capabilities of the ServiceNow Platform Coordinate upgrades to Production and Sub-Production instances Coordinate sub-production testing, evaluation, and regression remediation Participate in blueprinting workshops and contribute with documentation and effort estimation. Support COE in continuous development of training paths ...

ServiceNow Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £500 to £550 per day
Actions Forms and Service Catalog Develop inbound and outbound integrations with third-party systems Support data migration, transformation, and validation activities Perform unit testing, system testing, and support UAT Troubleshoot and resolve platform and integration issues Maintain documentation for technical designs and configurations Collaborate with architects, business ...

Senior C# Developer

Hiring Organisation
RED Global
Location
City of London, London, United Kingdom
with Python, ensuring seamless integration and high availability. Beyond hands-on coding, you will drive technical excellence by mentoring engineers, enforcing security and testing standards, and collaborating with cross-functional teams to deliver robust solutions that align with business goals and Agile timelines. Specific skills/experience required: Minimum … Developer Strong knowledge of core AWS Database services Hands-on experience with Infrastructure as Code, specifically using AWS CDK in Python Experience with automated testing frameworks and good understanding of unit testing principles Strong experience with Agile environments Excellent problem-solving skills, and strong leadership/collaboration ...

MERN Stack SME

Hiring Organisation
HCLTech
Location
City of London, London, United Kingdom
with RESTful APIs, GraphQL (preferred), and microservices architecture. Solid understanding of HTML5, CSS3, JavaScript (ES6+). Strong knowledge of Git, CI/CD pipelines, unit testing frameworks (Jest, Mocha, etc.). Experience deploying applications on Azure , AWS , or GCP . Familiarity with containerization tools (Docker, Kubernetes). Preferred ...

Mobile Engineer (Kotlin Multiplatform)

Hiring Organisation
MORGAN PHILIPS UK LIMITED
Location
City of London, London, United Kingdom
Employment Type
Permanent
complex mobile features using Kotlin Multiplatform. Influence sprint planning, estimation, and technical direction for larger delivery areas. Champion clean architecture, maintainable code, and robust testing practices. Conduct high-quality code reviews and elevate engineering standards across the team. Drive end-to-end delivery: design build test release support. Partner … Kotlin Multiplatform. Strong understanding of mobile architecture, modularisation, and design patterns. Excellent experience integrating mobile apps with backend APIs and services. Strong experience with unit testing and automated testing approaches. Proficient with Git, code review culture, and collaborative engineering workflows. Strong debugging, problem-solving, and communication skills. ...

Mobile Engineer (Kotlin Multiplatform)

Hiring Organisation
Morgan Philips Specialist Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
complex mobile features using Kotlin Multiplatform. Influence sprint planning, estimation, and technical direction for larger delivery areas. Champion clean architecture, maintainable code, and robust testing practices. Conduct high-quality code reviews and elevate engineering standards across the team. Drive end-to-end delivery: design build test release support. Partner … Kotlin Multiplatform. Strong understanding of mobile architecture, modularisation, and design patterns. Excellent experience integrating mobile apps with backend APIs and services. Strong experience with unit testing and automated testing approaches. Proficient with Git, code review culture, and collaborative engineering workflows. Strong debugging, problem-solving, and communication skills. ...

Software Engineers - Java/AWS (Mid to Lead Level)

Hiring Organisation
Omega Resource Group
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
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. ...

Software Engineer

Hiring Organisation
Gold Group
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
serverless architectures. Advanced understanding the development challenges moving on-prem workload to cloud. Experience of developing on Linux. Advanced understanding of mocking and unit testing frameworks such as JUnit 5.x (Jupiter). Expert with Git version control. Proficient in Agile Development using SCRUM. Advanced knowledge of Oracle/ ...

Senior Quality Assurance Engineer

Hiring Organisation
Gravitas Recruitment Group (Global) Ltd
Location
London Area, United Kingdom
seeking an experienced QA Engineer to define and deliver a robust test strategy across a high‐profile digital service. This role involves shaping testing approaches, supporting CI/CD improvements, and working closely with engineering, product, and user‐research teams to ensure high‐quality delivery. Key Responsibilities Define … overall test strategy, covering unit, integration, regression, and non‐functional testing. Design and implement the approach for load and performance testing. Contribute to CI/CD pipeline improvements to align with testing objectives. Participate in Scrum ceremonies and wider delivery meetings. Collaborate with internal stakeholders for approvals ...

Full Stack Developer

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £72000/annum
services utilizing the Java Spring Boot ecosystem. Data Management: Design and maintenance of SQL/NoSQL databases and ORM integration. Quality Control: Execution of unit testing, code reviews, and performance optimization to ensure high standards. Essential Skills Core Languages: Advanced proficiency in Java, JavaScript, HTML, and CSS. Back ...

Full Stack Developer

Hiring Organisation
Randstad Technologies
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 - £72,000 per annum
services utilizing the Java Spring Boot ecosystem. Data Management: Design and maintenance of SQL/NoSQL databases and ORM integration. Quality Control: Execution of unit testing, code reviews, and performance optimization to ensure high standards. Essential Skills Core Languages: Advanced proficiency in Java, JavaScript, HTML, and CSS. Back ...

Frontend Developer

Hiring Organisation
Solirius Reply
Location
London Area, United Kingdom
speed and scalability Ensure cross-browser compatibility and mobile responsiveness Collaborate with back-end developers to integrate APIs and services Maintain code quality through testing, debugging, and code reviews Stay up to date with emerging front-end trends, tools, and best practices Key Skills/Experience: You need … Experience of working with cloud infrastructure (Azure or AWS, GCP is beneficial) Ability to work with senior stakeholders and detailed technical specialists Experience in unit testing frameworks (Karma, Jasmine or others) and exposure to TDD is beneficial Analytical mind with problem-solving aptitude Package and Benefits: Competitive Salary ...

MS Dynamics 365 CE Developer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £600 per day
platform Develop Power BI dashboards and reports integrated into D365/Power Apps to deliver actionable insights to project and operational teams Perform unit testing, troubleshoot issues, and resolve bugs to ensure system stability. Deliver and configure solutions using Copilot Studio and Copilot for Sales, ensuring high-quality ...

Salesforce Developer (SC Required)

Hiring Organisation
Teksystems
Location
London, United Kingdom
Employment Type
Contract
test, and deploy Apex code (classes, triggers, and components) to extend Salesforce functionality. · Participate in the full software development lifecycle, including requirements gathering, development, testing, deployment, and maintenance. · Implement and maintain robust DevOps practices, including source code management, branching strategies, pull requests, and commits. · Utilize DevOps tools such … documentation, including design specifications, code comments, and user guides. · Provide technical support and troubleshooting for Salesforce applications. · Adhere to best practices for Apex, Flows, Unit Testing and participate in peer reviews to ensure code quality and system integrity. Job Title: Salesforce Developer (SC Required) Location: London ...

KDB Developer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
changes * Troubleshoot complex system issues and ensure high system reliability * Contribute to technical design with a focus on code reuse and maintainability * Support automated testing and continuous integration processes Key Requirements * Strong experience with KDB/Q * Excellent troubleshooting, unit testing, and problem-solving skills * Technical design … JavaEE * Exposure to JSCRIPT and Web UI technologies (big plus) * Knowledge of equities and equities trading flows (big plus) * Familiarity with Azure, Fitnesse, automated testing tools, GitLab & ServiceNow (plus) Additional Information * Interview Process: 2 Rounds of interview. How to Apply If you're interested in this role, click 'apply ...

Senior Salesforce Developer - Service Could - Experience Cloud - Marketing Cloud - Apex - LWC

Hiring Organisation
Nexere Consulting Limited
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 80,000 - 95,000 Annual
solutions. Build and configure functionality across Service Cloud and Marketing Cloud. Write clean Apex code and use declarative tools to meet business needs. Complete unit testing, documentation, and support system testing. Collaboration & Stakeholder Engagement Work with Product Owners and Business Analysts to translate requirements into effective solutions. Participate ...

Swaps Developer Contract

Hiring Organisation
Jefferies
Location
City of London, London, United Kingdom
specific projects or issues from start to finish. Documenting. Working with global colleagues, stakeholders and management to ensure appropriate prioritisation. Write high quality code, unit testing, working with QA, and overseeing the production release cycle. Trade support queries (2nd line) Person Specification The following skills and experience ...

PEGA Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £450 to £500 per day
analytics, reporting, and operational decision-making. Design and develop user interfaces using Pega UI frameworks, ensuring usability, consistency, and alignment with enterprise standards. Perform unit testing, debugging, and performance tuning, proactively identifying and resolving defects and bottlenecks. Support application releases and deployments, working closely with DevOps ...

Artificial Intelligence Engineer

Hiring Organisation
Deloitte
Location
Greater London, England, United Kingdom
team to build and deliver high-impact solutions. Essential Skills and Experience Expert-level Python programming skills; strong advocate for PEP8 compliance, clean code, unit testing, and version control (Git, Unix, pytest). Experience retrieving data from structured, unstructured and web sources (Selenium/PlayWright, Pandas ...

Machine Learning Engineer

Hiring Organisation
The Change Partners - Global talent specialists for a connected world
Location
London Area, United Kingdom
Production Experience: You’ve built and shipped scalable systems before (ideally with ML/AI components) DevOps Mindset: You’re comfortable with version control, unit testing, and automated deployment pipelines (GitHub Actions). You built reusable frameworks and modular code that lasts. Bonus Points: If you’ve worked … with AWS/GCP, understand the nuances of A/B testing, or have a passion for open-source development, we definitely want to talk. Please note this role doesn’t offer sponsorship. Please apply to learn more about the role. ...

KDB Developer

Hiring Organisation
Hays
Location
City of London, London, United Kingdom
regulatory driven changes. Skills: • Experience with KDB/Q • Technical design skills that focus on code reuse and ease of maintenance • Excellent troubleshooting, unit testing, and problem-solving skills • Experience with Java and JavaEE applications • Experience with JSCRIPT and Web UI technologies is a big plus • Previous exposure … equities trading flows is a big plus • Previous exposure to Microsoft Azure or other cloud technologies a plus • Previous experience with Fitnesse, Automated testing tools, GITLAB & ServiceNow is a plus This role is advertised via Hays ...

Lead PySpark Engineer

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£281 - £292/day 388
Performance Tuning: Optimise Spark execution (partitioning, shuffling, caching) to ensure cost-efficient processing of massive financial datasets. Quality & Governance: Implement rigorous CI/CD, unit testing, and data reconciliation frameworks to ensure "penny-perfect" accuracy. Technical Stack Engine: PySpark (Expert), Python (Clean Code/SOLID principles). ...