Sales Development Representative (SDR)

Sales Development Representative (SDR)

London, United Kingdom (Hybrid – 3 days per week in office) | Up to £50,000 + Benefits

With a recent strategic investment from Zurich Insurance and backing from the people behind Deliveroo, Zoopla, and Delivery Hero, we’re continuing to grow and evolve. Our journey has already been featured in The Economist, TechCrunch, and The Times—just to name a few.

A brief overview

As an SDR, you’ll be the driving force at the top of our sales funnel, building repeatable processes to generate qualified leads and create pipeline stability. With a targeted outbound strategy and high-quality prospecting, you’ll help fuel new business by delivering opportunities for our Account Executive to convert. The focus is building an engineer that powers our growth.

What you will do

• Generate pipeline through consistent, high-quality outbound activity
• Own multi-channel outreach across cold calls, email sequences and LinkedIn
• Build and execute repeatable outreach cadences that drive engagement and can be scaled across the team
• Leverage the sales tech stack to maximise prospecting efficiency
• Identify, research, and target ICP accounts and buyer personas, creating tailored outreach strategies
• Collaborate closely with Account Executives to ensure seamless handover of opportunities and alignment on target accounts
• Track and report on KPIs and conversion rates (dials, meetings booked, opps accepted, opp-to-close) to maintain a data-driven approach
• Continuously test and optimise messaging and cadences based on performance metrics and market feedback
• Maintain impeccable CRM hygiene in Salesforce, ensuring all activities, contacts, and opportunities are logged and accurate
• Engage with senior decision-makers credibly, understanding their business challenges and positioning Onsi’s value effectively
• Self-coach using call recordings and feedback loops to continually refine outreach techniques

This role isnor you if …

• You want a pure play strategy & management role. We’re all individual contributors here too.
• Don’t thrive in unpredictable, unstructured environments. Things change here, often.
• Struggle with ambiguity or uncertainty. We’re on a continuous learning journey, and things are often in flux.
• Want a highly specialised & defined role. We tend to operate more as hands-on generalists, which has a high degree of fluidity. “That’s not in my job description” isn’t a phrase we tend to use!
• You work best independently and remotely – we collaborate often and value being together and exchanging ideas in real time.

You will love this opportunity if

You’re someone who thrives when taking ownership, challenges the norm, and celebrates the small wins along the way. Whether it’s navigating ambiguity or owning your impact, this role will allow you to stretch your limits and grow. There is no ‘I’ in Onsi, we don’t take ourselves too seriously and always win as a team.

You will need

• Proven track record as an SDR with consistent success meeting or exceeding targets in a B2B tech sales environment
• Strong outbound experience (phone, email, LinkedIn) with ability to build pipeline across multiple channels
• Experience developing, testing and refining repeatable, scalable sales processes
• Strong copywriting for sales emails and LinkedIn outreach
• Commercial acumen and confidence engaging senior stakeholders
• Fluency with sales tech stack (e.g. Salesforce, Salesloft, Apollo/Cognism/ZoomInfo, LinkedIn Sales Navigator, Gemini/call recording tools) with willingness and ability to adopt new stacks

Excited about this opportunity? We’d love to hear from you! Please apply directly through the application link. We kindly ask that you apply through the link rather than reaching out directly, as it\’s the quickest way for us to give your application the attention it deserves. We can’t wait to review your application and hopefully get to know you soon!

What will you get in return?

Benefits:

• Pension Contributions – tiered matching up to 7% (UK)
• Access to Onsi ODP and Marketplace
• 25 days annual leave plus bank holidays. Increased holiday allowance scheme up to 35 days plus holidays with tenure
• Birthday day off, because no one should have to work on their birthday
• Special days off – up to 3 extra days for life events like weddings and moving days
• 1 month paid sabbatical after your 5th year of service
• Enhanced Parental Leave – enhanced pay and staggered return to work
• Family Leave, starting (or growing) a family is a major life event. We’re here to support you through everything, from fertility treatment to appointments
• Personal development budget to help you grow. £500 per annum increasing to £1500 after 3 years
• Dedicated Learning & Development days – 12 days per annum

Perks

• Flexible working hours and location: Split your time between your home and any of our offices in London or Amsterdam
• Work from abroad – up to 20 days per annum
• Office Snacks & Drinks Enjoy a variety of snacks, coffee, tea, and more
• Social and team activities: Team lunches, coffee catch-ups, after-work get-togethers, and quarterly events — there’s always something happening to bring everyone together
• Onsi swag: Onsi-branded gear like hoodies, notebooks, and water bottles, as welcome gifts and for milestone anniversaries
• Knowledge Sharing: Lunch & Learns, Monthly Speaker Series, Team workshops and offsites
• Keep healthy with 24/7 GP, Mental Health Support & Gym Discounts
• Cycle to work and Tech schemes saving you money and spreading the cost

Our Values

• Get Onside: We recognise that we’re strongest as a team when we unite to achieve our mission. We’re committed to supporting & bringing out the best in each other. Put simply, we’re on each other’s side.
• Say It Like It Is: We embrace clarity, concision and transparency. Why? Because candour enables quality conversation, better decisions and greater speed.
• Bring Your Edge: Our creativity and innovation stems from our unique perspectives. We celebrate our diversity of thought, welcome new ideas and cultivate the talents that set us apart. We actively participate in creating an inclusive and respectful community where everyone feels valued.
• Make It Count: We pursue our goals with determination and a laser focus on what’s important while disregarding what’s not. We strive to succeed, accomplish and perform.

Our Commitment

We aim to foster a diverse and inclusive workplace where differences are valued and where employees are treated fairly and supported in achieving their full potential.

Onsi is therefore fully committed to ensuring that it recruits, develops and retains employees solely on merit and that no one is treated less favourably because of age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex or sexual orientation.

Thank you for considering Onsi. We’re looking for passionate individuals to help us shape the future of work. If this opportunity excites you, we’d love to hear from you!