Javascript jobs in United Kingdom

Job Focus: Pre to Post Sale Engineering for SaaS

Salary: 60-65k, OTE Scheme ~ 10% base

Location: Reigate/Manchester

Department: Product Activation

Reports to: Solutions Engineer Team Lead

Job Type: Full Time, Permanent

Working Pattern: 2 days per week onsite |4.5 day working week (Half day Fridays)

When it comes to helping marketing, sales, and customer service teams make smarter business decisions with call intelligence - Infinityleads the way.

Since 2011, enterprises across the world have been using our call tracking and speech analytics tools to optimise marketing campaigns, improve sales performance, streamline contact centre operations, and improve experiences for their customers.

If you want to be part of a forward-thinking, progressive team, at the forefront of tech and growing AI innovations, there’s never been a better time to join Infinity.

As a Solutions Engineer, you’ll be a trusted technical advisor and partner to staff and customers across the customer journey, spanning new business and onboarding to ongoing technical success. This role is about perfectly balancing technical diligence with commercial prowess and intuition, helping prospective and existing customers get maximum value from our call tracking and intelligence platform.

You’ll play a critical role in revenue generation by translating product features into meaningful business value in commercial conversations, helping prospects and customers understand how our capabilities directly support their goals and drive ROI. You’ll support innovation through exploring new capabilities that solve real customer problems - including crafting proof‑of‑concepts (POCs), utilising new and emerging AI technologies, and initiating early‑stage technical solutions that can evolve into productised features.

Driving Growth as a partner to Sales and Customer Success Managers you will:

• Translate customer/prospect needs into tailored solution proposals with clear technical documentation (e.g. SOW’s or CSD support), inc diagrams and success criteria
• Facilitation of business cases that articulate ROI, ensuring commercial proposals are anchored in outcomes, not just technical capabilities
• Facilitation of technical requirements such as RFP’s, RFI’s, and InfoSec
• Lead discovery sessions to uncover technical requirements, constraints, and opportunities, removing risk, ambiguity
• Deliver compelling product demos, proof-of-concepts, and solution walk-throughs to prospects and existing customers
• Ensure seamless handoff from sales to onboarding, managing expectations, scope, minimising customer effort and setting up onboarding and long term success

Enabling Success as a partner to Onboarding, Support and Success Managers you will:

• Assist the onboarding team with any advanced or custom implementation requirements, including API usage, call routing logic, tracking setup, and integrations.
• Document and communicate customer requirements and technical configurations clearly to internal teams
• Act as a trusted technical advisor for customers especially during escalated or high-impact scenarios requiring complex troubleshooting or solution design
• Proactively identify and facilitate adoption of advanced product solutions to boost customer maturity, value, and stickiness
• Support the creation of knowledge base articles, guides and other documentation relating to technical product solutions, both for customers and internal teams

Fostering Innovation as a partner to Product, Engineering and Commercial teams you will:

• Proactively identify and collaborate to bring through new and exciting solutions that can translate into meaningful customer and business value
• Craft POCs and initiate early‑stage technical solutions to test and validate
• Champion customer needs and insights during product ideation and roadmap planning
• Partner with relevant teams especially Product and Engineering to raise and aid resolution of matters impacting quality, scale, efficiency of new and existing solutions

You have a background in solutions engineering, technical consulting, or sales engineering in a SaaS, martech, or analytics environment.

• Thrive in a high‑energy, growth‑focused environment
• Enjoy working cross‑functionally — with Sales, Success, Product and Engineering
• A proactive problem‑solver who takes ownership and thrives in customer‑facing roles
• Always looking to develop yourself and your skills, a curiosity and drive to improve
• Bring positivity and resilience to your work, and help foster a culture of accountability, humour, and support
• Care about doing meaningful work and want to be part of a business where people and performance both matter

• 3+ years in a customer‑facing technical role (Solutions Engineer, Presales, Technical Consultant, etc.)
• Strong understanding of SaaS technologies — especially APIs, data platforms, CRM integrations, and analytics.
• Experience with web technologies (e.g. JavaScript, tracking snippets, webhooks) and marketing tech is a plus.
• Comfortable with light scripting or data query logic is a bonus (e.g. SQL, Python, etc.)
• Experience contributing to product innovation or building POCs is highly desirable.

Work at the forefront of AI‑powered marketing analytics and call intelligence.

Play a key role in shaping commercial outcomes and product evolution.

Collaborate with passionate, expert teams across the UK and US.

Hybrid and flexible working, plus opportunities for professional growth and development.

• Work/balance:4 and‑a‑half day working week - Every Friday is a half day
• 25 days holiday (with the option to buy up to an additional 5 days per year)
• Private single medical insurance
• Employee Assistance Programme
• Life Assurance (4x Salary)
• Enhanced Maternity and Paternity Pay
• Tech Scheme Loan (of up to £2,000 per year)
• Ride to Work Scheme
• Season Ticket Loan
• Dedicated annual company and team social budget

At infinity, our aim is to be the best call tracking provider in the world and to do that we welcome our employees with open arms and create an environment where you can bring your best self, every day! We're an equal opportunities employer. That means we'll never discriminate based on race, religion, origin, gender expression, sexual orientation, age, marital status, social economics status or disability status. In fact, our recruitment process is completely anonymised, and we don't see any of your personal details when we review your application.

At Infinity, we don't treat our hiring process as a box ticking exercise and we're just as interested in team fit as we are technical fit. So, even if you don't meet all the requirements listed in one of our vacancies, get in touch with us anyway because we'd love to hear from you