Full Stack Developer X2 (Mid-Level - React.js, Node.js) - Product Development (Remote, UK-based)

£50k - £60k

Full Stack Software Developer required to join our client’s growing Product Development team. This is a unique opportunity to work remotely in the UK, contribute to modern digital platforms, and shape the future of our products in a collaborative and progressive tech environment.

As part of their team, you’ll help rebuild and enhance our web platform, Back End systems, and APIs, as well as maintain and improve internal and customer-facing applications already in production.

Key Responsibilities

• Develop new software products and features using modern engineering practices
• Maintain and improve existing applications and services
• Write clean, well-tested, and well-documented code
• Collaborate closely with other developers through paired or mob programming
• Contribute to a microservices-based architecture

They work with a variety of technologies. You’ll ideally have experience with some of the following, or be open to learning:

• JavaScript: React, Node.js, Jest, Cypress
• Ruby (non-Rails environment) - nice to have
• AWS: EC2, ECS, Lambda, S3, SQS
• Databases: MongoDB & PostgreSQL

They are looking for someone who is:

• Proactive, collaborative, and adaptable
• Approachable and supportive of colleagues
• A strong communicator with empathy for others

In return, our client can offer:

• Fully remote work within the UK
• A key role in a growing, successful team
• A chance to make a tangible impact with your ideas
• Competitive salary and benefits package
• Exposure to modern tech practices in a progressive environment

Please send through your CV to ARC IT Recruitment for consideration today!

Senior Java Engineer Modern Stack | TDD & CI/CD | Complex Systems Remote First (office visit once a month) - you must live within 1hr 30 of South Manchester £60,000 - £70,000 + Bonus + Excellent Benefits \*\*my client is not able to provide sponsorship We're working with a long-established tech company who are continuing to modernise a complex platform within a highly regulated domain. They've built a strong engineering culture around Agile and XP practices, and they're now looking for a Senior Java Engineer to join one of their Scrum teams. This is a role for someone who is genuinely hands-on, enjoys solving tricky problems, and cares about building software the right way - clean code, testing, collaboration, and continuous improvement. The Opportunity You'll join a cross-functional team working on large-scale systems that have real-world impact. Engineering standards are taken seriously here, but it's not dogmatic - it's practical, delivery-focused, and built around doing things sustainably. The Senior role is almost entirely hands-on, but they're looking for someone with the experience and maturity to: \*\*mentor other engineers \*\*lead by example \*\*contribute to good engineering practices \*\*help the team deliver reliably Tech Stack & Practices The core platform is Java-based, supported by a modern mix of tooling: \*\*Java, Spring Boot \*\*TDD / automated testing \*\*CI/CD and modern delivery pipelines \*\*AWS (including serverless approaches in places) \*\*Docker, Kubernetes \*\*Infrastructure as Code (Terraform, etc.) You don't need to tick every box - strong Java + good engineering habits are the priority. Exposure to AWS and DevOps tooling is a nice bonus. What They're Looking For \*\*Strong experience building backend systems with Java & Spring Boot \*\*Comfortable working with TDD and modern engineering practices \*\*Experience delivering production software in Agile teams \*\*Someone who enjoys mentoring and helping others grow \*\*Collaborative mindset - pairing, code reviews, shared ownership \*\*Bonus points for AWS, Docker/Kubernetes, Terraform, etc. What's In It For You? \*\*Remote-first working with minimal office travel \*\*Strong salary, bonus and excellent benefits \*\*A genuinely good engineering culture (not just "Agile" on paper) \*\*Meaningful work, complex systems, and long-term platform thinking \*\*Plenty of room to learn and grow Interested? Apply now or get in touch for more info - even if you don't have a CV ready, we're happy to chat. Cathcart Technology is acting as an Employment Agency in relation to this vacancy

Senior Java Engineer Modern Stack | TDD & CI/CD | Complex Systems Remote First (office visit once a month) - you must live within 1hr 30 of South Manchester £60,000 - £70,000 + Bonus + Excellent Benefits \*\*my client is not able to provide sponsorship We're working with a long-established tech company who are continuing to modernise a complex platform within a highly regulated domain. They've built a strong engineering culture around Agile and XP practices, and they're now looking for a Senior Java Engineer to join one of their Scrum teams. This is a role for someone who is genuinely hands-on, enjoys solving tricky problems, and cares about building software the right way - clean code, testing, collaboration, and continuous improvement. The Opportunity You'll join a cross-functional team working on large-scale systems that have real-world impact. Engineering standards are taken seriously here, but it's not dogmatic - it's practical, delivery-focused, and built around doing things sustainably. The Senior role is almost entirely hands-on, but they're looking for someone with the experience and maturity to: \*\*mentor other engineers \*\*lead by example \*\*contribute to good engineering practices \*\*help the team deliver reliably Tech Stack & Practices The core platform is Java-based, supported by a modern mix of tooling: \*\*Java, Spring Boot \*\*TDD / automated testing \*\*CI/CD and modern delivery pipelines \*\*AWS (including serverless approaches in places) \*\*Docker, Kubernetes \*\*Infrastructure as Code (Terraform, etc.) You don't need to tick every box - strong Java + good engineering habits are the priority. Exposure to AWS and DevOps tooling is a nice bonus. What They're Looking For \*\*Strong experience building backend systems with Java & Spring Boot \*\*Comfortable working with TDD and modern engineering practices \*\*Experience delivering production software in Agile teams \*\*Someone who enjoys mentoring and helping others grow \*\*Collaborative mindset - pairing, code reviews, shared ownership \*\*Bonus points for AWS, Docker/Kubernetes, Terraform, etc. What's In It For You? \*\*Remote-first working with minimal office travel \*\*Strong salary, bonus and excellent benefits \*\*A genuinely good engineering culture (not just "Agile" on paper) \*\*Meaningful work, complex systems, and long-term platform thinking \*\*Plenty of room to learn and grow Interested? Apply now or get in touch for more info - even if you don't have a CV ready, we're happy to chat. Cathcart Technology is acting as an Employment Agency in relation to this vacancy.

Senior Full Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer who thrives in structured architectural environments and enjoys building scalable, enterprise-grade systems using the latest .NET and Angular technologies. Key Responsibilities You will be responsible for: Designing and developing scalable backend services using .NET 10 and ASP.NET Core Web APIs Building and maintaining Angular 21 front-end applications using DevExpress DevExtreme v25 Implementing Azure-native solutions (App Services, Azure SQL, Storage) Developing and maintaining Infrastructure as Code using Bicep Integrating Azure Entra ID for authentication and role-based access control Managing secure secrets via Azure Key Vault Writing and maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10 / ASP.NET Core Angular 21 (mandatory) DevExpress DevExtreme v25 (mandatory) Entity Framework Core TypeScript / RxJS Microsoft Azure Azure Entra ID Azure Key Vault Bicep (Infrastructure as Code) CI/CD pipelines Bitbucket (Git) You'll also work closely with UI/UX teams using Figma and operate within Agile delivery frameworks. What They're Looking For 5+ years' commercial software development experience Strong expertise in modern .NET Proven experience with modern Angular (15+ ideally) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code (Bicep preferred) Experience integrating Azure Entra ID authentication Strong understanding of RESTful API design Experience implementing CI/CD pipelines Background working in regulated or security-sensitive environments Experience with DevExpress / DevExtreme is highly desirable. Why This Role? This is a standout opportunity for a senior engineer who values secure architecture, clean code, and modern Azure cloud engineering. You'll join a mature technical environment with clearly defined standards, strong DevOps practices, and a genuine commitment to security and scalability. If you're open to a confidential discussion, apply now and I'll be in touch. Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website. TPBN1\_UKTJ

The Data Platform Engineer designs, develops, automates, and maintains secure, scalable, and compliant data platforms that enable the firm to efficiently manage, analyse, and utilise data. The role ensures that data solutions are robust and reliable while meeting regulatory obligations and safeguarding client confidentiality.

Key Responsibilities

• Design and architect scalable, secure, and compliant data platforms and solutions, producing technical documentation and securing approvals through governance bodies such as Architecture Review Boards.
• Build and deliver robust data solutions using Databricks, PySpark, Spark SQL, Azure Data Factory, and Azure services.
• Develop APIs and write efficient Python, PySpark, and SQL code to support data integration, processing, and automation.
• Implement and manage CI/CD pipelines and automated deployments using Azure DevOps to enable reliable releases across environments.
• Develop and maintain infrastructure-as-code (eg, Terraform, ARM) to provision and manage cloud resources, including ADF pipelines, Databricks assets, and Unity Catalog components.
• Monitor, troubleshoot, and optimise data platform performance, reliability, and costs, identifying bottlenecks and recommending improvements.
• Create dashboards and observability tools to report on platform performance, usage, incidents, and operational KPIs.

Knowledge, Skills & Experience

• Degree in Computer Science, Data Engineering, or a related field.
• Proven experience designing and building cloud-based data platforms, ideally within Azure.
• Strong hands-on expertise with Databricks, PySpark, Spark SQL, and Azure Data Factory.
• Solid understanding of Data Lakehouse architecture and modern data platform design.
• Proficiency in Python for data engineering, automation, and data processing.
• Experience developing and integrating REST APIs for data services.
• Strong DevOps experience, including CI/CD, automated testing, and release management for data platforms.
• Experience with Infrastructure as Code tools such as Terraform or ARM templates.
• Knowledge of data modelling, ETL/ELT pipelines, and data warehousing concepts.
• Familiarity with monitoring, logging, and alerting tools (eg, Azure Monitor).

Desirable

• Experience with additional Azure services (eg, Fabric, Azure Functions, Logic Apps).
• Knowledge of cloud cost optimisation for data platforms.
• Understanding of data governance and regulatory compliance (eg, GDPR).
• Experience working in regulated or professional services environments.

Title: Senior Software Engineer (GPU Drivers)

Company: AI Acceleration

Location: London (very flexible WFH)

Pay: Up to £160,000 + bonus and benefits

Company:

An advanced HPC R&D firm, looking to expand their GPU Driver team. Most of the team are ex-Big-Tech, ex-FAANG or ex-Chip firms. They joined because they get more flexibility and have more challenging/interesting work to do as the team is significantly smaller, with highly technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring.

Role:

Senior Software Engineer position. You will be a significant hire spearheading much of their 2025 development. Much of the team will be built around you, and significant hires have already been made. You will develop, optimise and maintain their GPU driver stack, focusing on the performance and efficiency of graphics and compute workloads on cutting-edge GPU architectures.

About you:

• 2 years+ in GPU Driver Development
• Strong C++ or C programming skills
• Experience with OpenCL or Vulkan

Full details are available. Please don’t hesitate to get in touch.

Senior Full Stack Engineer - UK (Remote) - £60k-£70k I'm working with a UK-based organisation that is building a secure, offline-capable property visiting platform using modern Microsoft technologies. They are looking for a Senior Full Stack Engineer to play a key role in delivering the first iteration of a strategic cloud platform that will expand under a 'fail fast' innovation model. This is an excellent opportunity for a senior engineer who thrives in structured, security-focused environments and enjoys building clean, scalable systems from the ground up. The Opportunity You'll join a senior engineering team delivering a greenfield platform consisting of a .NET MAUI mobile application (iOS & Android), an Angular 21 web application, and Azure-hosted backend services built using clean architecture principles. Reporting into technical leadership, you'll contribute to architectural decisions while remaining hands-on across backend, frontend, cloud infrastructure, and mobile. This is a role for someone who thinks architecturally but delivers incrementally, maintaining high standards for quality, security, and performance. The initial programme will establish the engineering standards and cloud foundation that future products will be built upon. Key Responsibilities You will be responsible for: Writing production-quality, well-tested, secure code across backend, web, and mobile Designing and building RESTful APIs using clean architecture principles Developing offline-first mobile functionality using .NET MAUI Building secure Angular 21 frontends using strict TypeScript and MSAL authentication Implementing Infrastructure as Code using Bicep Deploying and managing Azure-hosted services using enterprise DevOps practices Integrating Azure Entra ID authentication and role-based authorisation Collaborating closely with Product, UX (Figma), and QA teams Challenging ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10 / ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure (App Services, Azure SQL, Blob Storage, Key Vault, Application Insights) Infrastructure as Code (Bicep) Azure Entra ID (authentication & RBAC) NUnit (backend and mobile testing) Vitest & Playwright (frontend and E2E testing) Desirable Experience: Power BI report templating Azure Fabric / Data Lake familiarity Geospatial or mapping APIs (Google Maps preferred) iOS exposure (ARKit / LiDAR / sensor APIs) Experience in regulated or security-sensitive environments What They're Looking For At least 5 years' commercial software engineering experience Strong expertise in modern .NET Proven experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural standards Clear and confident communication skills Highly desirable: experience with DevExpress / DevExtreme. Why This Role? This is a rare opportunity to shape a foundational cloud platform from day one using the latest Microsoft stack. You'll work in a disciplined, enterprise-grade engineering culture where security, performance, and quality are non-negotiable - while also contributing to a wider innovation strategy that will evolve beyond the initial product. If you're open to a confidential discussion, apply now and I'll be in touch. Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website. TPBN1\_UKTJ

DigitalGenius is a venture-backed artificial intelligence company bringing practical applications of deep learning and AI to some of the largest ecommerce customer service operations in the world, as well as high-growth companies. We’re a dedicated team of thoughtful and hard-working people committed to transforming customer service through the application of artificial intelligence. Role The continuous improvement of our products and the range of innovation projects we are committed to require us to scale our Machine Learning team. We are searching for a Machine Learning Engineer to join our core AI Team. This is a highly technical role for an outstanding individual who can take ownership of projects and start new initiatives. As a Machine Learning Engineer at DigitalGenius, you will be responsible for building and improving our Natural Language Processing, Image Recognition, and Recommendation solutions to maximise the product’s performance for our customers. Your time will be divided between improving the core product, researching and developing new ML applications and working closely with our clients. This is an excellent opportunity for those with strong programming capabilities and a deep understanding of AI. We are looking for someone with complementary skills that extend beyond NLP, preferably somebody with experience in ecommerce. The AI team at DigitalGenius owns all ML-related research, implementation and maintenance. In practice, this means keeping up to date with the SOTA research, data analysis, and developing scalable production services and infrastructure. Responsibilities - Proactive approach with team members and clients - Continuous improvement of core AI services - Take ownership of the services within your expertise - Contribute to the ongoing innovation R&D projects - Implement and maintain ML Infrastructure - Requirements - Degree in relevant field with 3+ years of industry experience - Strong Technical Skills: Python, Production APIs, Infrastructure as Code, - AWS or other Cloud provider - Deep understanding of Natural Language Processing / Generative AI / - Image Recognition - Extensive experience with machine learning techniques and algorithms such as supervised and unsupervised learning techniques, predictive modelling and statistics. - Experience with MLOps - Excellent organisation skills, working independently and ability to deliver results for deadlines. - A proactive, innovative, pragmatic approach to problem-solving and an ability to think critically and objectively. - Good customer-facing skills and ability to communicate technical concepts to technical and non-technical audiences. - Experience in ecommerce space Benefits - Competitive Salary - Generous vacation time (25 days of annual leave) - Yearly "Reset Week" in addition to annual leave allowance - Freedom to experiment with your own ideas - Environment to develop your skills without bureaucracy or red tape - Monthly fitness stipend of $210 or fully paid Third Space Membership We are an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

_Haystack is working with a direct employer on this opportunity._ Company We are using AI Agents to transform customer experience for ecommerce brands. With a proprietary approach to agentic AI, we have a unique opportunity to become the undisputed leader in our industry. We’re looking for excellent candidates to join our dedicated, thoughtful, and hardworking team to help us achieve that goal. We are a global company with offices in London, New York, and people across the world. Our customers include some of the biggest names in retail including On, Rapha, Air Up, Holland & Barrett, AllSaints, Honeylove, and Clarins. Role We are looking for an experienced software engineer to help us build our product. You will be working on the platform and backend services of the product and also the middle layer that sits between third party customer support tools and our proprietary AI platform. We value autonomy, excellence, pragmatism and impact. Responsibilities include: - Building microservices for our no-code platform, analytics, admin console, data management functionality and others - Designing and implementing maintainable and scalable architecture for consuming and providing APIs - Integrating with 3rd party systems Required Experience - Scala (3+ years of real, hands-on experience in Scala in a professional environment) - Functional programming and hands-on experience with functional programming libraries - Experience developing HTTP RESTful APIs - Excellent knowledge of SQL and relational databases (PostgreSQL) - Knowledge of Terraform (hands-on experience), Docker, AWS - Experience building and deploying microservices-based architectures - We use a functional Scala stack, primarily built on the Typelevel ecosystem, including: http4s, Circe, Cats, Cats Effect, FS2, Monix, and Slick. Interview Process - Our interview process is designed to be clear, fair, and human — just like how we work day to day. - Intro Call (40 mins) — A relaxed chat to learn more about you and share what we’re building. - Technical Stage — Show us how you think and solve problems, including a take-home challenge. - Culture Stage — We’ll explore how you collaborate, communicate, and align with our team values. - Final Chat — Meet a senior team member to discuss long-term goals and mutual fit. - We keep things efficient and most candidates complete all stages within 2–3 weeks. Benefits 🚀 Thrive in a dynamic start-up culture 💰 £80k - £100k annual salary depending on experience 📈 Stock options 🏝️ 34 days off — 25 annual + 8 public + your birthday! 🎳 Quarterly team socials & perks 💪 Stay fit with a $210 monthly fitness stipend or Third Space membership 🎉 Celebrate your birthday with a day off! We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Office location: Manchester Hybrid role: 1-day a week in-office in Manchester if within a 1-hour commute | 1-day a month in-office if outside of a 1-hour commute Salary: up to £50k per annum dependent on experience Haystack has partnered with this client, a growing company, to find a talented and experienced Node Developer / Engineer to join their team in Manchester. You will be joining a full-time Node development team, working on a wide range of existing and new projects for their client base. About You We are looking for a professional who is passionate about their work, possesses an eye for detail, and has a zeal for well-crafted and tested code. You should be comfortable working on large-scale projects with challenging developments and be keen to learn and progress within a dynamic team. Key Skills and Experience Required - Proficient in Node.js - 2+ years of commercial experience - Experience with Apollo GraphQL - Strong understanding of JavaScript and Object-Oriented Programming (OOP) - Comfortable working with JSON and creating back-end architectures - Experience with Git - Ideally, agency experience or comfort working in a fast-paced environment with multiple projects