**Contract Full-Stack JavaScript Developer**

📍 **Location:** Remote

📆 **Duration:** 6 Months

💼 **IR35 Status:** Outside IR35

💰 **Rate:** £450 - £550/day

Opus is partnering with a enterprise-level digital agency on the hunt for a **Contract Full-Stack JavaScript Developer** to work on a greenfield project. If you're passionate about creating beautiful front-ends, clean code, and modern tooling for headless CMS's - this one's for you!

🛠️ **Tech Stack:**

*   ⚛️ React.js
*   🟩 Node.js
*   🧠 TypeScript
*   🌐 REST APIs
*   🧪 Jest / Enzyme / Cypress
*   ☁️ Headless CMS Experience

📩 **Interested?**

Apply now or send your latest CV to **matthew.carter@opusrs.com** ASAP!

If you haven’t heard back within 48 hours, please assume your application was not successful this time.

Contract Full-Stack JavaScript Developer

**Product Engineer (Remote, Equity-Based) | Founding TeamCompany Description:**

Fluck empowers Gen Z and Millennials to save, earn, connect, and grow through personalization and gamification powered by AI and data. Our platform makes shopping rewarding, spending insightful, and encourages real-life social gatherings. We provide financial recommendations and challenges to foster friendly competition and enhance financial well-being. For businesses, we offer customer insights and transaction cost reduction via our merchant portal to boost loyalty and inventory management.

**Role Overview:**

Join our founding team as a Product Engineer driving the design, development, and optimization of innovative products. This hands-on role requires full-stack expertise across frontend, backend, and devops, combined with strong product engineering and UX design insight. You will be the technical and product owner, working remotely with cross-functional teams, managing sprints, and steering end-to-end product lifecycle from research through release.

**What You'll Do:**

*   Architect, develop, and own core product features with React Native, Next.js, Node.js (NestJS), and Java Spring Boot
*   Design scalable microservices and APIs connecting frontend, mobile app, and backend
*   Manage MySQL and PostgreSQL databases for efficient, secure data handling
*   Lead DevOps initiatives on Azure for cost-efficient build, deployment, monitoring, and scaling
*   Drive product design and user experience using UX/UI principles and user-centered design
*   Enforce GDPR and cybersecurity best practices for UK and EU markets
*   Manage remote engineering teams, plan sprints, and track progress with Jira
*   Conduct R&D, analyze data, and communicate progress to stakeholders
*   Prepare for future fintech features including payments and financial analytics integrations

**What We’re Looking For:**

*   5+ years of startup & multi-product experience as a Product Engineer, Full Stack Developer, DevOps Specialist, and Product Owner
*   Expertise in React Native, React/Next.js, Node.js/NestJS, Java Spring Boot
*   Strong knowledge of relational databases: MySQL & PostgreSQL
*   Experience architecting microservices and end-to-end product lifecycle ownership
*   Skilled in Azure cloud services, containerization, CI/CD pipelines, and cost optimization
*   Solid understanding of product design, UI/UX, and agile product management
*   Experience working in compliance with GDPR and cybersecurity standards in UK/EU markets
*   Proven ability to lead and manage remote development teams and sprint cycles
*   Excellent communication skills, analytical mindset, and independent working capability
*   Fintech experience or AI-driven product exposure is a plus.

**Why Join Us:**

*   Be a vital founding team member shaping innovative, gamified fintech products.
*   Equity-based role now; salary to follow as we raise funding or achieve revenue.
*   Fully remote, flexible work environment with a highly collaborative culture.
*   You can work along with any other current job or discuss any arrangements.

Product Engineer

😎 **Our Culture** Quantum Metric's number one objective is happy people, diverse and inclusive culture. We’re passionate about empowering our people to become the best version of themselves, offering coaching and training programs designed to accelerate their career in whatever direction they choose. As a remote-first company, we understand the importance of building an engaged, diverse, and fun place to work. We hold regular company-wide events, seasonal challenges, and Quantum Metric sponsored local outings when Zoom becomes too much. We also have a number of Employee Resource Groups that provide spaces to discuss, share, and reflect on topics that impact us both inside and outside of work - from being new to SaaS or navigating it as a first-time parent, to overcoming the barriers faced as Black, Hispanic, Asian American and Native Hawaiian/Pacific Islander, LGBTQIA or other underrepresented backgrounds. We are also passionate about the connections we build with our customers. You’ll not only work with some of the world’s most recognized brands, but build lasting relationships. At Quantum Metric we value all types of experience and education and don’t expect you to meet every qualification for this position. We are most interested in the unique perspective you can bring and your ability to uphold our values of passion, persistence, and integrity. **🚀 About The Role** As a Customer Success Engineer at Quantum Metric, you will help to support a portfolio of clients and manage the technical details of their implementation, onboarding, adoption and growth. You will understand the challenges faced by your clients, guide them to define meaningful requirements, and create innovative solutions to ensure they are successful in achieving their objectives. **🔧 Responsibilities**

*   Adapt quickly to changing priorities and capable of operating in an ambiguous environment.
*   Architect: Equip stakeholders with the capabilities to effectively execute their digital strategy. Understand your client’s objectives, define their implementation plan, and configure the Quantum Metric platform to satisfy their requirements.
*   Engineer: Develop custom JavaScript functions to capture data analytics and satisfy complex use cases. Configure alerts, dashboards, and reports to give clients real-time visibility to the performance of their digital platforms

**💡 Requirements**

*   Past experience developing, implementing, or managing digital solutions
*   Experience in Professional Services, Customer Success, Sales Engineering, Solutions Consulting, or other client facing roles is preferred
*   Solid understanding of web technologies, analytics, front-end development, and best practices for UX/UI
*   Development experience with HTML, CSS, and JavaScript
*   Experience with React, Angular, Vue, or native mobile is a plus
*   Must exhibit proficiency in JavaScript development
*   Hands-on experience with digital analytics solutions such as Adobe Analytics, Adobe Target, Google Analytics, Optimizely, or Tealeaf
*   Expert knowledge of browser developer tools to test scripts & diagnose issues
*   Familiarity with the page load lifecycle & techniques for performance optimization
*   Strong project & time management skills. Must be able to multi-task while simultaneously juggling the needs of multiple clients
*   Able to adapt quickly to changing priorities and capable of operating in an ambiguous environment
*   Excellent verbal and written communication skills, including presentation skills
*   Socially capable and be able to connect with a diverse audience: senior leaders, middle managers, and individual contributors, both technical and non-technical
*   Travel - estimated once per month

🏆 **Perks & Benefits** Group Health Plans (100% paid) Life Assurance Employee Assistance Program Stock Options Employee Lead Referral Program Internal Lead Referral Program One-Time Home Office Enhancement Stipend Monthly Business Expense Stipend Parental Leave Company-Wide Unlimited Paid Time Off policy (In addition to statutory vacation entitlement) RECHARGE PROGRAM (after 3 years, disconnect for 3 weeks, no email/slack) Sick Pay in accordance with statutory requirements Automatic enrollment in QM Pension Plan with 4% match MacBook and awesome swag delivered to your door Encouraging and collaborative culture **🐉 About Quantum Metric** As the leader in Continuous Product Design, Quantum Metric helps organizations put customers at the heart of everything they do. The Quantum Metric platform provides a structured approach to understanding the digital customer journey, enabling organizations to recognize customer needs, quantify the financial impact and prioritize based on the impact to the customer and business’ bottom line. Today, Quantum Metric captures insights from 40 percent of the world’s internet users, supporting nationally recognized brands in ecommerce and retail, travel, financial services and telecommunications. Our customer retention rate is 98%. Quantum Metric has been named to the Inc 5000 and the Deloitte 500 for the last five-consecutive years, and has made the Best Places to Work lists by Glassdoor, BuiltIn, Fast Company and Forbes. If the above role seems like a match and you’re interested in joining a team of people with exceptional potential from diverse backgrounds, perspectives, and life experiences, we want to hear from you! The job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Quantum Metric reserves the right to change, edit, and add duties and responsibilities of all job descriptions at any time, at its sole discretion, and to notify the respective employee accordingly. **Quantum Metric will only provide offers of employment and all communications regarding employment from an official @quantummetric.com email address and/or LinkedIn inMail. Quantum does not recruit via channels such as WhatsApp or Telegram, and will not ask for a candidate’s sensitive information and/or any upfront fees/costs during the job application process. Quantum asks that any candidates report any suspicious recruitment efforts to security@quantummetric.com.** Quantum Metric is an E-Verify employer: https://e-verify.uscis.gov/web/media/resourcesContents/E-Verify\_Participation\_Poster\_ES.pdf Applicant Privacy Policy: https://www.quantummetric.com/legal/applicant-privacy-policy/ #BI-Remote

Customer Success Engineer - UK

**📈 Who We Are:We're rebuilding the energy transaction system, making it transparent and fair.** tem exists to put power back in the hands of people. Today’s wholesale energy market is stacked in favour of the few. It's a product of an age of oil and gas, riddled with markups and middlemen. We’re changing that. Our product, RED™, built on a proprietary pricing engine that bypasses the wholesale market, enables businesses to buy the energy produced by renewable generators directly. That's 100% transparent transactions, ensuring affordable bills and fair compensation, to give every business ownership and control over where their energy comes from. Since launching in 2021, we’ve saved UK businesses and generators over £20 million, powering a growing network of forward-thinking companies, from Pizza Pilgrims to Silverstone. Backed by top-tier VCs such as Atomico and Albion, we’re creating a new category in energy - one that’s local, decentralised, and built on trust. **🏅 The Role:** We’re looking for a **Senior Full Stack Engineer** to design and build the systems that power our customer acquisition and success platforms. You’ll be at the heart of delivering new features that improve how brokers, customers, and internal teams engage with energy services. In your first 12 months, you’ll lead development of intuitive customer-facing portals, streamline internal workflows through automation, and contribute to the foundations that enable us to scale quickly. You’ll work closely with Product Managers, Designers, and fellow Engineers to bring ideas to life - from concept to production. **🚀 Responsibilities:**

*   Build with impact: Develop full-stack features across modern front-end frameworks and serverless back-end systems, with a focus on performance, reliability, and usability.
*   Shape the experience: Build intuitive, high-quality interfaces and tools that improve the way customers and brokers interact with our platform.
*   Improve how we ship: Contribute to internal tooling, frameworks, and engineering workflows that help us deliver faster and with greater confidence.
*   Collaborate cross-functionally: Partner with Product, Design, and other Engineers to design thoughtful, user-centred solutions to complex problems.
*   Maintain high standards: Write clean, well-tested code, contribute to code reviews, and help improve team practices and documentation.

**🎯 Requirements:Must-Haves:**

*   Proven product delivery experience: Experience as a Full Stack Engineer in a startup or fast-paced product environment, with ownership of key projects from start to finish.
*   Front- and back-end fluency: Strong experience with Python and/or Node.js, and modern JavaScript frameworks like React.
*   Cloud-native skills: Experience working with AWS services, especially serverless tools like Lambda, API Gateway, and DynamoDB.
*   User-focused mindset: Comfortable turning product and user problems into simple, elegant technical solutions.
*   Team-first approach: Experience working in cross-functional teams where Engineers, Designers, and Product Managers collaborate closely.

**Desirable:**

*   Experience building platforms or tools for brokers, sales partners, or operational teams.
*   Exposure to the energy sector or other regulated industries.
*   Familiarity with real-time data systems or internal workflow automation.

**✨ Benefits & Perks:**

*   Competitive salary - our current band for this role is £80,500 or equivalent in local currency.

*   We review salaries twice a year using real-time market data, with transparent, consistent pay for the same role and level.

*   Stock Options - everyone on the team has ownership in our mission.
*   25 days holiday + public holidays - Swap public holidays for ones that matter most to you. Plus, get an extra day off for your birthday 🎉.
*   Remote & flexible working - We’re fully remote with clear core hours, and no internal meetings on Friday afternoons.
*   Home working & wellbeing budgets:

*   Up to £1,200 / €1,200 annually to upgrade your remote setup (co-working passes, equipment, etc.).
*   Up to £150 / €150 monthly on anything that supports your wellbeing - from therapy to gym memberships to meditation apps.

**🗣️ Interview Process:** Our processes normally take around 2-3 weeks from first call to offer - please let us know about any adjustments to timelines that may be required.

*   First call with our Talent Team (30 Mins). This is to understand your experience, motivations, and discuss the role in more detail.
*   Behaviour Interview with our Engineering Managers (60 Mins). This is your chance to really understand the role, the expectations, and ensure alignment on ways of working.
*   Technical Interview with the Team (90 Mins). You’ll meet with potential peers in this session and will discuss technical topics and experiences.
*   Culture-Add Interview with Stakeholders (45 Mins). The final session will be with two cross-functional stakeholders, and will explore how your values align with ours, and is designed to be a genuine two-way conversation, your chance to understand what it’s really like to work at tem.

_We welcome applications from people of all backgrounds, experiences, and identities, including those that are traditionally underrepresented in the tech and energy sectors. If you’re excited about this role but not sure you meet every requirement, we’d still love to hear from you. Your unique perspective could be exactly what we’re looking for._ Compensation Range: £80.5K

Senior Full Stack Engineer

**Head of Mobile, Solution Architect | Native &/or Cross-platform, Enterprise Mobile Architecture | Large-Scale Clients, Pre-Sales | £100k-135k + Benefits | Full-time | UK or Europe (Remote)Opportunity:**

We're supporting a leading global consultancy with strong enterprise partnerships, who are urgently hiring Mobile Architects to drive large-scale client delivery. This is a client-facing, senior architectural role - shaping strategy from the ground up, engaging with senior stakeholders, and ensuring delivery teams are set up for long-term success.

**What You'll Be Doing as a Head of Mobile, Solution Architect | Native &/or Cross-platform, Enterprise Mobile Architecture | Large-Scale Clients, Pre-Sales | £100k-135k + Benefits | Full-time (& Contract) | UK or Europe (Remote)**

*   Act as the bridge between business goals and technology: translate client objectives into scalable mobile solutions.
*   Lead discovery sessions, workshops, and pre-sales engagements, producing artefacts such as HLA diagrams, context diagrams, LLDs, and NFRs.
*   Define and implement mobile architectures including super apps, micro-frontends, and modular frameworks.
*   Engage with VP-level and senior stakeholders, presenting recommendations and influencing governance decisions.
*   Respond to RFIs and RFPs with formal documentation for large enterprise clients.
*   Set up and lead teams (8+ Mobile engineers), providing the roadmap, structure, and environment for delivery success.
*   Make and present Architecture Decision Records (ADRs), clearly evaluating options and recommending solutions.
*   Ensure compliance and best practice for regulated industries (insurance, medical, fintech, and beyond).

**Core Skills for the Head of Mobile, Solution Architect | Native &/or Cross-platform, Enterprise Mobile Architecture | Large-Scale Clients, Pre-Sales | £100k-135k + Benefits | Full-time (& Contract) | UK or Europe (Remote)**

*   Proven experience as a Mobile Architect and or Leader
*   Strong technical breadth across Native and/or React Native and/or Flutter mobile stacks.
*   Track record of working on large-scale, enterprise mobile applications.
*   Experience leading workshops, discovery, and strategy sessions with stakeholders.
*   Skilled in diagramming and technical documentation (HLA, context, LLD, NFRs).
*   Strong stakeholder engagement skills, able to own client relationships and drive delivery outcomes.
*   Previous exposure to pre-sales, governance, and regulated environments.
*   Excellent English communication skills (B1+ minimum).

**Details for theHead of Mobile, Solution Architect | Native &/or Cross-platform, Enterprise Mobile Architecture | Large-Scale Clients, Pre-Sales | £100k-135k + Benefits | Full-time (& Contract) | UK or Europe (Remote)**

Contract type: Permanent (contract-to-perm considered)

Location: UK or Western Europe, ideally near an EU/UK office

Salary: £100k – 135k + bonus + benefits

Start: ASAP

Scale: Opportunity to be the first of multiple hires in this area

**If you're interested in this Head of Mobile, Solution Architect | Native &/or Cross-platform, Enterprise Mobile Architecture | Large-Scale Clients, Pre-Sales | £100k-135k + Benefits | Full-time (& Contract) | UK or Europe (Remote), please apply here and we'll be in touch if it's a good match!**

Head of Mobile, Solution Architect | Native &/or Cross-platform, Enterprise Mobile Architecture | Large-Scale Clients, Pre-Sales | £100k-135k + Benefits | Full-time | UK or Europe (Remote)

\*\*\*In order to apply for this role, please create a profile on Haystack and submit your application to the job advert on the portal\*\*\*

**DescriptionReact/JavaScript Developer roleOverview**

We are passionate about the impact our product is making, particularly in areas like sustainable supply chain management and traceability. Our flagship application enables organisations to track forest-risk commodities across their supply chains, helping them meet sustainability targets and comply with relevant regulations. In doing so, we aim to combat deforestation and illicit trade in commodity supplies. Designed for scalability, our platform supports an expanding number of supply chains and organisations, with the flexibility to onboard other industries and products seamlessly.

**The Role**

We’re a small, distributed team based across Europe. We're looking not only for strong technical expertise but also for individuals who are kind, curious, and collaborative. Our culture empowers engineers to deeply understand and own the problems they’re solving—not just to write code that’s "good enough."

In this role, you’ll be at the forefront of developing our flagship application, involved in all stages of the product lifecycle—from design and development to ongoing maintenance. You’ll focus on building intuitive, user-friendly interfaces through maintainable, high-quality code, while actively participating in the product’s evolution by contributing ideas and suggesting improvements.

**What we’re looking for:**

*   A passion for web application development and a drive to deliver impactful solutions
*   Proficiency in TypeScript, React, CSS3/SCSS, and HTML5
*   Experience working with RESTful and GraphQL APIs

**What we offer:**

*   A competitive salary
*   25 days of paid leave, plus paid public holidays
*   An enhanced pension scheme
*   The flexibility to work remotely from anywhere in Europe or from a shared workspace in London
*   A meaningful technical challenge on a project with real-world impact

Would you like to join a team building a product that truly makes a difference?

Javascript Developer

**About us:** Outliant is a fully remote, US-based digital product development and startup consulting company with a team of culturally diverse creators whose exceptional skills and talents help conceive seamless digital products. Our teams exhibit work-play energy that supports individual growth as well as encourages the freedom of creativity and “thinking outside the box.” **Our Core Values:**

*   Pursuit of Excellence: We are extremely competitive, ambitious, and driven to be exceptional – as individuals, teams, and an organization. There is no standard high enough, and we will never settle. We aspire to attract, retain, and empower the very best people.
*   Startup Mentality: Outliant began with 5 startup founders, and startup culture is deep in our DNA. It’s a critical advantage that allows us to move faster, be more resourceful, and empower our team at all levels. We are in the early chapters of our journey.
*   World-Class Remote Collaboration: Outliant is (and always has been) a 100% remote company – we have no offices, and our teams are distributed around the world. Given the freedom and autonomy this provides, we require that our people excel in this remote structure.

**About the role:** We’re looking to hire a full-time remote **Solutions Architect II** for **Webflow-based projects**. You'll be empowered to define your own work and set the technical vision for assigned projects. Given broad business direction, you'll generate new frameworks, concepts, and methodologies within the solution architecture field. You'll be responsible for crafting your own roadmap and creating challenging yet achievable projects, fostering an environment of continuous learning and growth. **This role requires working in EST (Eastern Standard Time).Seniority Level:** Senior Level **Responsibilities:**

*   Strategic Collaboration: Collaborate with stakeholders across various departments to understand their needs and challenges at a strategic level.
*   Complex Requirements Analysis: Analyze complex business requirements and translate them into innovative and future-proof technical solutions.
*   Concept Generation: Generate and promote new concepts, principles, and methods within the solution architecture discipline.
*   Solution Design and Architecture: Design and architect highly scalable, secure, and cost-effective solutions, considering emerging technologies and industry best practices.
*   Technology Integration: Select and integrate cutting-edge technologies (hardware, software, cloud) to build robust and efficient solutions, including Webflow, React, Node.js, Google Tag Manager, and Google Analytics.
*   Technical Documentation: Develop and maintain comprehensive technical documentation to ensure knowledge transfer and ongoing solution effectiveness.
*   Presentation Leadership: Lead presentations and discussions, effectively defending your proposed solutions to both technical and non-technical audiences.
*   Implementation Collaboration: Collaborate with development teams to ensure seamless implementation of your designed solutions.
*   Optimization Identification: Identify opportunities for optimization within existing systems and propose innovative solutions to improve overall efficiency.
*   Emerging Technologies Monitoring: Stay at the forefront of emerging technologies, actively evaluating and integrating them into your solution strategy.
*   Mentorship and Knowledge Sharing: Mentor junior Solution Architects and share your expertise by contributing to internal knowledge sharing initiatives.
*   Team Leadership Experience: Demonstrated experience leading and guiding teams to achieve project and organizational goals.

**Requirements:**

*   Minimum 7 years of experience in solution architecture or a related technical role (e.g., software development, DevOps, systems engineering).
*   Hands-on experience with Webflow, ReactJS and Node.js.
*   3-5 years of experience in solution design and implementation, with expertise in a specific domain (e.g., cloud computing, security).
*   Proven track record of successfully leading and executing complex technical projects.
*   Mastery of a broad range of technical skills relevant to the role, including cloud computing, enterprise architecture, and IT security.
*   Strong ability to generate innovative solutions and develop new approaches within the solution architecture field.
*   Strong communicator who can bridge the gap between technical and non-technical audiences.
*   Exceptional analytical and problem-solving skills, with the ability to think strategically and consider long-term implications.
*   Experience implementing and managing Google Tag Manager and Google Analytics for web projects.
*   Certification in solution architecture (e.g., AWS/Azure Solutions Architect or Google Cloud Certified Professional Cloud Architect) is a plus.
*   Experience with enterprise integration patterns and best practices.
*   Hands-on experience with cloud platforms, preferably AWS.
*   Strong understanding of microservices architecture and containerization technologies (e.g., Docker, Kubernetes).
*   Ability to create and maintain comprehensive documentation of architecture designs and solutions.
*   Experience with automation and orchestration tools.
*   Familiarity with compliance and regulatory requirements (e.g., GDPR, HIPAA).
*   Strong leadership skills with the ability to influence and guide technical teams.
*   Ability to stay current with emerging technologies and industry trends.
*   Experience in managing stakeholder expectations and delivering high-quality solutions on time and within budget.
*   A personal computer with stable internet connection.

**What’s in it for you?** As a full-time member of our team, you’ll enjoy:

*   Paid Time Off.
*   Non-working holidays per country of residence.
*   Pro-rated 13th-month bonus in select regions.
*   Salary increases and performance-based bonuses.
*   Referral bonuses.
*   Monthly internet stipend.
*   Fun and casual work environment.
*   Employee engagement activities and virtual gatherings.
*   We are a diverse, global team! 🌍

**Important Notice** To ensure the legitimacy of job opportunities, we strongly recommend that you solely rely on positions posted here on our official website: **outliant.com/careers**. All our current job openings require video interviews conducted in either or both synchronous (via Google Meet) and asynchronous (via Willo) formats. Kindly refrain from accepting offers that appear suspicious. For any inquiries or concerns, feel free to reach out to us via email at **recruitment@outliant.com**. Please be assured that we are fully committed to maintaining integrity in our hiring process.

Solutions Architect II (Webflow experience)

About the company:

Our client is a seed stage DeFi start up with $9m funding with an engineering team of 6 people across the world.

**Key Job Requirement:**

*   At least 5 years in frontend or full-stack development.
*   Strong expertise in React and TypeScript (React Native and Node.js is a plus).
*   Proven high-performance mindset with a top 10% track record.
*   Interest in crypto/DeFi (prior experience not necessary).
*   Comfortable working in remote, async-first environments.

**Key Job Responsibilities:**

*   Develop and scale the company's crypto wallet product.
*   Collaborate with design and product teams to implement features.
*   Influence architecture decisions and enhance our codebase and engineering practices.

**Desired Skills and Experience** crypto; web3 wallet; DeFi; React; Typescript; React Native;Node.js

**Robert Walters Operations Limited is an employment business and employment agency and welcomes applications from all candidates**

Contract Full-Stack JavaScript Developer

Job Description

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