Junior Software Engineer jobs in United Kingdom

Amsterdam, North Holland, Netherlands; London, England, United Kingdom

We're quickly growing and super excited for you to join us!

Today, Topsort has 5 major hubs worldwide, and employees in 13+ countries, including Menlo Park, Boston, Santiago Chile, Sao Paulo Brazil, Barcelona Spain, and Sydney Australia. We are a truly global company that was born in the pandemic that’s had rapid growth since out of a genius product, a customer-first mentality, and a hardworking team of talented individuals. Since our founding in 2021, we’ve gained customers in retail, marketplaces, and delivery apps in 40+ countries and quickly approaching the #1 position in the industry.

Do you enjoy a fast-paced environment? Do you like seeing your work create real-time impact, being part of a rocket ship from the very beginning? Let’s do the unimaginable - let’s make ads clean and cool again, with AI and modern technology.

Our team is all about straightforward communication, embracing feedback without taking it personally, and fostering a super collaborative environment. It’s a sports team that’s hyper focused on winning, collaborative internally, and competitive externally - never the other way around.

We thrive on working in the open, lifting each other up, and getting things done with a sense of urgency. We\'re the kind of team that loves making bold choices, sharing extraordinary opinions, and maintaining a 100 mph pace. No endless meetings here – if it can be done today, we\'re all about getting it done today.

We are looking for a hands-on and client-facing Software Engineers - Integrations focused to join our team at Topsort. In this role, you will play a pivotal part in translating real-world business needs into powerful, scalable product solutions. You’ll collaborate directly with sales, product, and engineering teams to support Pre-sales conversations - partner with sales to understand customer pain points, lead technical implementations with Topsort.

You will:

• Engage with Prospects & Clients: Work closely with the sales and customer success teams to understand client requirements and propose tailored technical solutions.
• Own Technical Discovery & Demos: Lead technical conversations and run product demonstrations that align our platform’s capabilities with customer needs.
• Solution Design: Translate business challenges into feasible product configurations, data integrations, and implementation plans.
• Support RFPs and Security Questionnaires: Respond to technical and compliance-related questions in RFPs and trust questionnaires.
• Own the entire integration process – You won’t just be following instructions; you’ll be leading integrations end-to-end, solving complex challenges, and acting as a trusted technical advisor to our clients.
• Be the bridge between tech & customer success – Work directly with clients, engineers, and product teams to deeply understand their needs and ensure seamless API integrations. Your solutions won’t just be functional—they’ll be impactful and user-friendly, strengthening long-term customer relationships.

What (we think) you need to be successful - we’re open to not checking all the boxes and be proven wrong by outlier candidates as well!

• Industry Experience: 1+ years in software development, managing integrations, APIs, system interoperability, or ad tech is a plus. etc.
• API Expertise: Strong experience with RESTful APIs, authentication methods (OAuth), and data formats (JSON, XML).
• Proven ability to communicate complex technical ideas clearly to both technical and non-technical audiences.
• Demonstrated success working directly with enterprise clients, understanding their operational realities and constraints.
• Comfortable navigating ambiguity and making decisions with incomplete information.
• Clear sense of ownership — you lead the solution from pre-sales design through implementation and post-sale success.
• Experience collaborating with product and engineering teams to shape customer-driven roadmaps.
• Bachelor’s degree and above in Computer Science, Engineering, or related field from a top school.
• CRM & Platforms: Familiarity with customer relationship management (CRM) tools and integration platforms.
• Communication & Stakeholder Management: Strong ability to interact with both technical and non-technical audiences, translating complex concepts into actionable insights.

• Deep dive into details: Professionals who are not content with superficial answers and dive deeply into the details to uncover root causes and optimal solutions.
• Team first: A low need for individual recognition, always prioritizing collective results over personal credit.
• You thrive with ambiguity: Exceptional ability to tackle open-ended problems in unstructured environments, turning chaos into structured innovation.
• Adaptability: Willingness to learn, mentor, lead, and follow as the situation demands, fostering growth at all levels.
• Urgency: A disproportionate sense of urgency in execution, while keeping scalability and the creation of replicable processes in mind to ensure long-term success.
• Curiosity: Genuinely curious individuals who can quickly learn difficult concepts and apply them effectively.

Do you sound like the right fit? Let\'s dive right in!

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