CI/CD Jobs in England

476 to 500 of 1,344 CI/CD Jobs in England

Senior DevOps Engineer

North East, United Kingdom
Anson Mccade
confidently Infrastructure as Code (Ansible, Terraform, or equivalent) Containerisation using Docker, with orchestration via Kubernetes or Docker Swarm Monitoring expertise with ELK, Grafana, or equivalent tools CI / CD experience with TeamCity Knowledge of Microsoft SQL Server Experience in both Windows and Linux administration Excellent communication skills for both client and team interactions A minimum … Bitbucket, JIRA Artifact storage using Artifactory Octopus Deploy Static analysis tools such as SonarQube Control-M Cloud platforms ( Azure, AWS, or GCP ) VMware (vSphere) and SAN technologies Reference: AMC / RHU / DVP #ryhu More ❯
Employment Type: Permanent
Posted:

Senior Solutions Architect

Holborn, Greater London, England
Nexus Jobs Limited
Understanding of distributed computing paradigm and exposure to building highly scalable systems. " Experience with platform modernization and cloud migration projects " Expertise in Agile development methodologies like TDD, BDD, Performance / Load testing etc. " DevOps experience - CI / CD, Test Automation, Containerization - tools and processes " Should be conversant with emerging technologies - chatbots, voice / conversational interfaces, RPA, Machine Learning, etc. " In-depth, hands-on experience in developing web / mobile applications or platform with either Java / J2EE or .NET tech stack and database technologies such as Oracle, MySQL, etc. " Exposure to polyglot programming languages like Scala, Python and Golang will be a plus " Ability to read / write code … customer proposals - solution architecture, pitch decks, estimating solution effort, resourcing and timelines " Translate requirements into solution architecture diagrams, implementation roadmap, delivery approach and other artifacts " Understand business & technology issues / challenges and translate that to modern technology solutions " Engage with business and IT groups to align solution architecture with strategic business direction " Build a trusted advisor relationship with business More ❯
Employment Type: Permanent
Posted:

Managing Architect

Central London, London, United Kingdom
Aker Systems Limited
to be 90% or more of the time across one or more client assignments. Technical Leadership : Part of the client leadership team as the Client CTO for assigned projects / services, supporting the Client Delivery Director, Client Account Director and the delivery team to ensure we deliver against all client deliverables and payment milestones. Lead Architect: Lead solution, data … cloud, service and security architects / engineers during design and delivery projects and services, and responsible for delivering design documents and other key artefacts to support governance and delivery. Senior Influencer: Need to be a leader and able to influence through excellent communication skills. You will relish collaboration and embrace challenges. You will understand the nuances of business and … specifically bespoke software solutions, particularly in streaming and cloud-native solutions. Data Platforms designing modern data platforms with appropriate architecture coving Data Mesh, Data Fabric, Data Lake etc. Data / Analytics - solving enterprise data and analytics problems using technology Cloud - hands-on Public Cloud experience in either AWS / Azure / Google, both their 'services' and 'how More ❯
Employment Type: Permanent
Posted:

Senior Fullstack Developer

Huddersfield, West Yorkshire, Yorkshire, United Kingdom
Hybrid / WFH Options
Erin Associates
Senior Full Stack Developer Huddersfield / Hybrid £55 - 65k + benefits Were looking for a Senior Full Stack Developer to join this growing team, working on a high-traffic ecommerce website and bespoke internal tools. Their tech stack is Laravel, Inertia, Tailwind, TypeScript, React, which is deployed serverlessly in AWS via Laravel Vapor. Key Responsibilities Deliver high-quality full … to translate business needs into efficient technical solutions. Essential Skills 5+ years experience with Laravel 5+ years experience with React 3+ years with TypeScript Strong Git & CI / CD knowledge Solid experience working with AWS (ideally serverless / Laravel Vapor) Confident mentoring junior developers and giving constructive feedback Strong problem-solving and communication skills … Desirable skills : Ecommerce experience (Shopify, Magento), Storybook & accessibility (WCAG 2.2), integrations with payments / WMS / PIMs, automated testing (Playwright, Selenium), load testing tools (Locust, JMeter). Whats on Offer £50k£66k DOE (flexible for the right candidate) 25 days holiday + bank holidays Training & development budget Hybrid working (on-site during onboarding) Private healthcare, pension, enhanced leave More ❯
Employment Type: Permanent, Work From Home
Salary: £65,000
Posted:

Machine Learning Engineer

London, United Kingdom
Optimove
an experienced Machine Learning Engineer to work on incredibly interesting projects as we take our personalization capabilities to the next level. You will focus on developing and advancing ML / AI across our platforms, researching and investigating new machine learning applications within the company, and improving pre-existing models. Role & Core Responsibilities Own the model development and release process … Models (LLMs), to enhance our products and services. Fully real-time architecture for data processing, model development, and deployment. Deploying and enhancing ML frameworks, optimizing for inference, and training / retraining cycles. Online testing for models with live data using proprietary A / B / N testing technology to rapidly determine what works (and what doesn't … including sports betting and gaming, where it might add value and what best practices look like. Full understanding of recommendation algorithms and their applications. Professional experience in personalization and / or predictive CRM, and micro-segmentation. Experience with CI / CD pipelines and Infrastructure as Code (IaC) tools (Terraform, Bicep, etc.). More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Machine Learning Engineer - Customer Solutions

London, United Kingdom
Hybrid / WFH Options
Unitary
startup experience A background in building and operating agentic AI systems Experience with MLOps practices and tools, and monitoring machine learning systems in production Knowledge of CI / CD practices and tools such as GitLab CI, Argo CD Proficiency with SQL and NoSQL databases Worked with Kubernetes and infrastructure as code More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Staff Machine Learning Engineer

London, United Kingdom
Hybrid / WFH Options
Unitary
startup experience A background in building and operating agentic AI systems Experience with MLOps practices and tools, and monitoring machine learning systems in production Knowledge of CI / CD practices and tools such as GitLab CI, Argo CD Proficiency with SQL and NoSQL databases Worked with Kubernetes and infrastructure as code More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Embedded SW Engineer

Kemble, Gloucestershire, United Kingdom
Hybrid / WFH Options
Circuit32 Recruitment Solutions Ltd
I'm recruiting for a start-up company in Cirencester who are looking to recruit an experienced Embedded SW Engineer. The role involves development of code in C / C++ and Python on ARM based micros, for use in the telecoms / IoT space. ROLE: Embedded Software Engineer LOCATION: Kemble SALARY: up to £65,000 START: ASAP Skills … required for the Embedded Software Engineer are: C / C++ / Python ARM based micros (Raspberry Pi ideally) Comms protocols (UART, I2C, SPI etc) IP networking (TCP / IP, DHCP and UDP) Embedded Linux OS Beneficial skills are: Raspberry Pi chip CI / CD or Docker for embedded development Whilst some remote More ❯
Employment Type: Permanent
Salary: £45000 - £65000/annum
Posted:

Full Stack Developer

Jarrow, Tyne and Wear, North East, United Kingdom
Hybrid / WFH Options
Catalyst
Write clean, maintainable, and well-documented code Troubleshoot, debug, and resolve software defects and issues Participation in regular meetings with internal customers As Full Stack Software Developer youll offer / need: A strong foundation or extensive experience as a highly skilled and versatile Full Stack Developer or similar - both front-end and back-end development, with hands-on experience … across a wide range of technologies including C#, PHP, SQL Server, MySQL, mobile development (iOS / Android), and Windows Forms. Understanding of object orientated programming techniques Familiar with applying concepts of Databases, GUIs, REST APIs, Computer Networks and Protocols for application layer integrations. Experience in handling CI / CD pipelines, creating & maintaining the required … infrastructure in Azure and AWS. A relevant Computing / Software qualification is desirable Strong knowledge / experience of the Microsoft .Net stack including, C# .Net Framework & Core Working knowledge of T-SQL, LINQ and Entity Framework, Javascript, HTML and CSS, IIS, PHP Hands-on experience in mobile development for iOS and Android (native or hybrid frameworks) Experience with More ❯
Employment Type: Permanent, Work From Home
Salary: £35,000
Posted:

Solutions Architect

London, United Kingdom
Jas Gujral
Understanding of distributed computing paradigm and exposure to building highly scalable systems. Experience with platform modernization and cloud migration projects Expertise in Agile development methodologies like TDD, BDD, Performance / Load testing etc. DevOps experience - CI / CD, Test Automation, Containerization - tools and processes Should be conversant with emerging technologies - chatbots, voice / conversational interfaces, RPA, Machine Learning, etc. In-depth, hands-on experience in developing web / mobile applications or platforms with either Java / J2EE or .NET tech stack and database technologies such as Oracle, MySQL, etc. Exposure to polyglot programming languages like Scala, Python and Golang will be a plus Ability to read / write code … customer proposals - solution architecture, pitch decks, estimating solution effort, resourcing and timelines Translate requirements into solution architecture diagrams, implementation roadmap, delivery approach and other artifacts Understand business & technology issues / challenges and translate that into modern technology solutions Engage with business and IT groups to align solution architecture with strategic business direction Build a trusted advisor relationship with business More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Consulting Principal Lead (Presales)

London, United Kingdom
Amdocs
closely with delivery leads to ensure smooth transition from presales to delivery Helping to build & introduce clients to automated delivery methodologies including Infrastructure As Code and CI / CD pipelines leveraging Agentic AI Partnering with Hyperscale partners, and internal account teams to develop end to end solutions to address the client needs. All you need … infrastructure architecture, and application modernization. An understanding of security principles and other associated controls and features in CSPs. Experience in working in, and with, Agile delivery teams. Professional and / or Specialty-level AWS / Azure / GCP certifications. Good-to-Have Experience with security architecture, connectivity, account structure, or tenant design. Experience working with a wide More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Data Solutions Architect GCP

London, South East, England, United Kingdom
Hybrid / WFH Options
Tenth Revolution Group
decision-making. The role also involves significant pre-sales engagement, translating client needs into solution designs and supporting proposal development. Key Responsibilities Pre-Sales Engagement Support responses to RFPs / RFIs / RFSs by translating client requirements into solution blueprints and proposal narratives. Collaborate with sales, pricing, and delivery teams to shape commercially viable and technically sound solutions. … using GCP technologies such as BigQuery, Cloud Storage, Databricks, and Snowflake. Cloud Data Strategy Lead cloud migration and modernisation strategies using GCP and tools like Terraform, CI / CD pipelines, Azure DevOps, and GitHub. Data Modelling Apply hands-on expertise in enterprise data modelling using tools such as ERwin, ER / Studio, or PowerDesigner … to ensure performance, scalability, and maintainability. ETL / ELT Frameworks Design robust data pipelines using tools like Cloud Composer, Dataflow, Dataproc, Informatica, or IBM DataStage, supporting both batch and streaming ingestion. Data Governance & Quality Implement governance frameworks, metadata management, and data quality controls using platforms such as Unity Catalog, Alation, Profisee, or DQ Pro. Client Advisory Act as a More ❯
Employment Type: Full-Time
Salary: £100,000 - £125,000 per annum
Posted:

Data Solutions Architect (GCP)

City of London, London, United Kingdom
Hybrid / WFH Options
Tenth Revolution Group
decision-making. The role also involves significant pre-sales engagement, translating client needs into solution designs and supporting proposal development. Key Responsibilities Pre-Sales Engagement Support responses to RFPs / RFIs / RFSs by translating client requirements into solution blueprints and proposal narratives. Collaborate with sales, pricing, and delivery teams to shape commercially viable and technically sound solutions. … using GCP technologies such as BigQuery, Cloud Storage, Databricks, and Snowflake. Cloud Data Strategy Lead cloud migration and modernisation strategies using GCP and tools like Terraform, CI / CD pipelines, Azure DevOps, and GitHub. Data Modelling Apply hands-on expertise in enterprise data modelling using tools such as ERwin, ER / Studio, or PowerDesigner … to ensure performance, scalability, and maintainability. ETL / ELT Frameworks Design robust data pipelines using tools like Cloud Composer, Dataflow, Dataproc, Informatica, or IBM DataStage, supporting both batch and streaming ingestion. Data Governance & Quality Implement governance frameworks, metadata management, and data quality controls using platforms such as Unity Catalog, Alation, Profisee, or DQ Pro. Client Advisory Act as a More ❯
Employment Type: Permanent
Salary: £100000 - £125000/annum
Posted:

Software Engineer

City of London, London, United Kingdom
cer Financial
Software Engineer City of London Hybrid (3 / 2 split) Contract £900 - £1000 per day (Via Umbrella) cer Financial are working alongside an international bank, who are based in the City of London. They are seeking a Software Engineer to work with them on a contract. The responsibilities of the Software Engineer will include: Hands-on Full Stack development … operation team and users and provide level 3 support as required. The successful Software Engineer will have: Strong fundamental Computer Science knowledge including Concurrency; Algorithms and data structures Scrum / agile methodology (Product owner and / or Scrum master), or ability to deliver software on short cycles Evidence of delivering application from inception, to design, and to production … understanding of distributed systems, developing, profiling, and maintaining multi-threaded, asynchronous applications JVM monitoring, profiling, performance tuning, and debugging. Experience with analysis tools such as JConsole, JVisualVM, Elastic Search / Logstash, Prometheus; Open tracing Extensive experience of test driven development Knowledge of CI / CD on large complex systems Experience from working in the More ❯
Employment Type: Contract
Posted:

Senior Full Stack Software Engineer Angular /Python

Bristol, Avon, England, United Kingdom
Hybrid / WFH Options
Adecco
Job Title: Senior Full Stack Engineer (Angular / Python) Location: Hybrid - 2 days per week in Bristol office Contract Type: Permanent Salary: £65,000 - £90,000 (higher end for stand-out candidates with strong ownership experience) Role Overview for Senior Full Stack Software Engineer Angular / Python About the role My client is expanding the Engineering team, with … an additional Senior full stack software engineer to support and eventually take ownership of their new in-house underwriting workbench . This is TypeScript / Angular and Python / FastAPI based application. They are looking for a really stand out candidate who has strong ownership experience. We are seeking an experienced Senior Full Stack Engineer (Angular / … how users interact with complex data and models, while contributing to the growth and technical leadership of the engineering team. Key Responsibilities for Senior Full Stack Software Engineer Angular / Python Design, develop, and maintain responsive and performant Angular components. Develop and optimise backend services in Python (FastAPI), including REST API design and integration. Build interactive data visualizations (e.g. More ❯
Employment Type: Full-Time
Salary: Competitive salary
Posted:

Full Stack Developer - AI/Innovation

West London, London, England, United Kingdom
Adecco
name in the energy sector is looking for a full-stack developer with strong frontend capabilities, ideally in React . The candidate must have hands-on experience with AI / LLM technologies, including RAG, prompt engineering, or GenAI systems, with clear evidence of active contribution to such projects. The role offers flexible working arrangements, with travel to the client … s offices in Windsor twice a month Key skills include: JavaScript / TypeScript React Cloud-native development (AWS / Azure), CI / CD Ability to collaborate with designers to create user-friendly AI experiences Desirable Experience Experience in innovation teams, startups, or experimental environments Personal projects showing creativity and innovation Strong communication and More ❯
Employment Type: Contractor
Rate: Salary negotiable
Posted:

Senior Frontend Engineer

Salford, Lancashire, England, United Kingdom
Hybrid / WFH Options
AJ Bell
Expertise in building modular and reusable components for Single Page Applications with one or more of the following frameworks: Angular, React, Vue, Svelte, etc. Good knowledge of JavaScript (ES5 / 6 and up) Experience with at least one version control tool: GitHub, BitBucket, GitLab, etc. Experience with at least one UI framework: Bootstrap, Tailwind, Material, etc, Experience of common … Protractor, etc. Knowledge and interest in Web APIs Practical experience of solving inconsistency across multiple platforms (IE11, Safari, Firefox, Chrome on Windows or Mac) Familiar with CI / CD practices Understands principles behind highly performing web pages Agile / Scrum / Kanban Strong communication skills, written and verbal Very motivated with high levels … of drive and enthusiasm E-commerce and / or financial services experience About us: AJ Bell is one of the fastest-growing investment platform businesses in the UK offering an award-winning range of solutions that caters for everyone, from professional financial advisers to DIY investors with little to no experience. We have over 620,000 customers using our More ❯
Employment Type: Full-Time
Salary: Competitive salary
Posted:

Senior Java Developer

Manchester, Lancashire, England, United Kingdom
Interquest
What They're Looking For Strong expertise in Java and JVM-based systems (8+ years coding experience preferred) Solid background in system design, distributed systems, and cloud architectures (AWS / Azure / GCP) Passion for clean code, testing, and performance optimization Excellent communication, leadership, and decision-making skills A mindset for innovation, problem-solving, and continuous improvement Bonus … Points For Experience in microservices architecture and containerization (Docker, Kubernetes) Exposure to CI / CD pipelines and DevOps practices Background in agile methodologies and delivery management Contributions to open-source Java libraries or frameworks Why Join Them? Work with brilliant, passionate engineers Real ownership & influence over the product roadmap Flexible working hours and remote-friendly … as an employment agency for this vacancy. InterQuest Group is an equal opportunities employer and we welcome applications from all suitably qualified persons regardless of age, disability, gender, religion / belief, race, marriage, civil partnership, pregnancy, maternity, sex or sexual orientation. Please make us aware if you require any reasonable adjustments throughout the recruitment process. More ❯
Employment Type: Full-Time
Salary: Salary negotiable
Posted:

Senior Java Developer

Manchester, North West, United Kingdom
InterQuest Group (UK) Limited
What They're Looking For Strong expertise in Java and JVM-based systems (8+ years coding experience preferred) Solid background in system design, distributed systems, and cloud architectures (AWS / Azure / GCP) Passion for clean code, testing, and performance optimization Excellent communication, leadership, and decision-making skills A mindset for innovation, problem-solving, and continuous improvement Bonus … Points For Experience in microservices architecture and containerization (Docker, Kubernetes) Exposure to CI / CD pipelines and DevOps practices Background in agile methodologies and delivery management Contributions to open-source Java libraries or frameworks Why Join Them? Work with brilliant, passionate engineers Real ownership & influence over the product roadmap Flexible working hours and remote-friendly … as an employment agency for this vacancy. InterQuest Group is an equal opportunities employer and we welcome applications from all suitably qualified persons regardless of age, disability, gender, religion / belief, race, marriage, civil partnership, pregnancy, maternity, sex or sexual orientation. Please make us aware if you require any reasonable adjustments throughout the recruitment process. More ❯
Employment Type: Permanent
Posted:

Senior Software Engineer - Backend and Platform

London, South East, England, United Kingdom
Ithika Recruitment Ltd
Senior Software Engineer / Platform Developer - backend and platform TypeScript, AWS London - hybrid (Tues / Weds / Thurs in offices near Farringdon tube station) around £80,000 - £90,000 plus package Discretionary bonus (10%), Private Healthcare, 25 Days holiday, 5% pension, Life Insurance, 2 Volunteering days a year, Season Ticket Loan Do you love music, storytelling and … software so it’s quick, repeatable, and less error-prone. Skills they want: Comfortable coding in TypeScript (and ideally other strongly structured languages). Experience with CI / CD (automating the build, test, and release process). Know your way around AWS cloud services. Good at building REST APIs. Can work with databases and SQL. … features directly. What you'll be excited to work on: Modernising TeamCity into GitHub actions Improving dev productivity and quality of life Building a better AI pipeline - pier review / AI review - improving efficiencies and productivity with AI Transitioning old .NET API's to JS and Lambda (serverless) Building abstract provisioning tools Tools they use: TypeScript AWS (Terraform, AWS More ❯
Employment Type: Full-Time
Salary: £80,000 - £90,000 per annum
Posted:

Integration Developer - Salesforce Education Cloud-Student Systems Implementation

London, United Kingdom
Hybrid / WFH Options
InterQuest Group (UK) Limited
delivering integrations using Microsoft Azure PaaS (Functions, Logic Apps, API Management, Service Bus,) Expertise in integration strategy, API management, and canonical data models. Experience of integrating with Salesforce (REST / SOAP APIs, platform events) and Canvas LMS or similar SaaS platforms. Familiarity with integrating legacy systems (SITS) with modern cloud-native systems. Solid understanding of Agile delivery, sprint planning … backlog refinement, and DevOps principles. Experience with CI / CD pipelines, automated testing, and infrastructure-as-code (ARM / Bicep / Terraform). Exposure to integration monitoring and logging frameworks (e.g., Azure Monitor, Application Insights). Integration Developer- Salesforce Education Cloud-Student Systems Implementation Desirable Experience Experience working in Higher Education with a … as an employment agency for this vacancy. InterQuest Group is an equal opportunities employer and we welcome applications from all suitably qualified persons regardless of age, disability, gender, religion / belief, race, marriage, civil partnership, pregnancy, maternity, sex or sexual orientation. Please make us aware if you require any reasonable adjustments throughout the recruitment process. More ❯
Employment Type: Contract, Work From Home
Rate: £400 - 500 per day
Posted:

AI Engineer

London, United Kingdom
Hybrid / WFH Options
Hastings Direct
learn from experienced colleagues, contribute to responsible AI practices, and grow your skills in a collaborative and innovative environment. Skills we would love you to have: Experience in AI / ML engineering or applied machine learning. Basic experience delivering AI solutions in a collaborative environment. Proficiency in Python and familiarity with ML libraries Understanding of APIs, containers, and cloud … services with focus on Azure Familiarity with data engineering concepts and pipeline orchestration. Experience with version control (e.g. Git) and CI / CD practices. What we offer Join us and you'll find a different way of doing things. We call it the 4Cs. We focus on getting it right for our colleagues, customers, company … scheduled, that's why we have a range of support to help you keep yourself well. We have the thrive mental health app, our colleague assistance programme available 24 / 7, our own, in-house mental health first aiders, support groups and a dedicated team to make sure we are covering your needs There's more! - 25 days annual More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Automation Tester - Microsoft Dynamics 365

Wigan, Greater Manchester, North West, United Kingdom
Hybrid / WFH Options
Forward Role
need: Strong automation testing experience in enterprise environments Microsoft Dynamics 365 testing expertise (Field Service, Customer Insights) Azure technologies and API testing experience Azure DevOps and CI / CD pipeline knowledge .NET application and integration testing skills Strong automation mindset with frameworks like Playwright / Selenium Must be UK-based for this hybrid role … Bonus points for: TypeScript / Python / Java skills, Power Platform experience, SQL Server knowledge, energy sector background This is your chance to join a forward-thinking business shaping the future of technology solutions to better our planet. APPLY now or email *Please note you must be based in the UK and sponsorship is not available for this More ❯
Employment Type: Permanent, Work From Home
Salary: £45,000
Posted:

Junior/Mid Full stack developer .NET

Cheshire, United Kingdom
Hybrid / WFH Options
Blue Oak Recruitment
frameworks. Helping to reimagine older applications for the web and cloud. Writing clean, maintainable code and taking part in code reviews. Learning how to work with CI / CD pipelines, cloud environments, and testing tools. Collaborating with colleagues across product, QA and operations to deliver solutions. What we re looking for A good grounding in … C#, .NET Core / 6+, HTML / CSS and JavaScript / TypeScript. Experience with at least one modern frontend framework (React, Angular, etc.). Familiarity with SQL Server or similar databases. Curiosity about DevOps practices and cloud platforms like Azure. A positive, proactive attitude and a willingness to learn from senior team members. What you ll get More ❯
Employment Type: Permanent
Salary: GBP 45,000 - 50,000 Annual
Posted:

Junior/Mid Full stack developer .NET

Cheshire West and Chester, Cheshire, United Kingdom
Hybrid / WFH Options
Blue Oak Recruitment
frameworks. Helping to reimagine older applications for the web and cloud. Writing clean, maintainable code and taking part in code reviews. Learning how to work with CI / CD pipelines, cloud environments, and testing tools. Collaborating with colleagues across product, QA and operations to deliver solutions. What we’re looking for A good grounding in … C#, .NET Core / 6+, HTML / CSS and JavaScript / TypeScript. Experience with at least one modern frontend framework (React, Angular, etc.). Familiarity with SQL Server or similar databases. Curiosity about DevOps practices and cloud platforms like Azure. A positive, proactive attitude and a willingness to learn from senior team members. What you’ll get More ❯
Employment Type: Permanent
Salary: £45000 - £50000/annum
Posted:
CI/CD
England
10th Percentile
£50,000
25th Percentile
£57,500
Median
£72,500
75th Percentile
£88,750
90th Percentile
£106,250