Team Lead - Platform Engineering

ZEAL Network

ZEAL Network SE is a dynamic, international group of companies that has been creating exciting and innovative lottery experiences for over 20 years. As Germany’s largest provider of online lotteries through our brands LOTTO24 and Tipp24, and a trusted partner of Spain’s ONCE, the second-largest national lottery, we’re shaping the future of the lottery industry. We are passionate about driving innovation, as demonstrated by our newest brands, Freiheit+ and Traumhausverlosung, which bring fresh and exciting dreams to life. Additionally, through ZEAL Ventures, we invest in inspiring e-commerce start-ups like Omaze and DAYMADE, fueling fresh ideas and opportunities. Our team of 350+ professionals from diverse backgrounds is united by a visionary mindset, a passion for collaboration, and a commitment to inspire dreams. At ZEAL, we empower our people to think ambitiously and work together toward a shared purpose: helping people imagine and achieve their aspirations. As our Engineering Team Lead (f/m/d), you combine strong people leadership with hands-on technical expertise to guide and grow a high-performing team. Your team owns its domain and sits at the heart of Zeal's B2B core platform: its customers are the core platform teams themselves, whom you enable with reliable, scalable shared services. YOUR TASKS: * You lead a platform-focused engineering team responsible for building reliable, scalable shared services that enable all product teams * Hire, Build and lead a team of 2 engineers: Hire, develop, and grow a high-performing team, fostering an ownership-driven and reliability-focused engineering culture * Lead technically and strategically, define and drive architectural decisions together with your team * Code as part of the team: While guiding architecture and strategy, you’ll regularly write code, contribute to features, and help solve complex technical challenges together with your team * Champion the effective use of AI in your team's engineering workflows (e.g. AI-assisted development and tooling) and explore opportunities to apply AI within the platform's capabilities * Establish and drive reliability practices: Design and implement monkey testing and load testing strategies to proactively identify weaknesses and continuously improve platform resilience and stability * Own prioritization and backlog: Balance reliability, tech debt, operational, and business demands with stakeholders across Core, Product, and Platform, keeping a transparent roadmap focused on the highest-value work. * Own core technical services: Take end-to-end ownership of internally developed platform services such as Auth Service, API Gateway, ensuring they are scalable, reliable, and easy to consume * Act as the bridge between domains: Collaborate closely with Core domain teams and the Platform team to understand needs, identify gaps, and provide efficient, reusable technical solutions * Enable data and event flows: Own and evolve solutions core technical tracking infrastructure, ensuring reliable and scalable event collection and forwarding to downstream systems * Deliver secure, robust and maintainable technical solutions while focusing on great customer experiences and business needs WHAT YOU OFFER US: * Proven people leadership skills with the ability to grow teams from early stage to high performance * Strong hands-on engineering background in Kotlin/Spring Boot, Mongo/PostgresDB ideally paired with DevOps experience * Experience designing and operating reliable, scalable distributed systems, including resilience patterns and failure handling * Strong understanding of observability, monitoring, and performance testing including load/monkey testing * Experience building and evolving internal platform services and APIs that are easy for other teams to consume * “You build it, you run it” mindset with hands-on experience running services in Kubernetes-based environments * Ability to balance standardization vs. team autonomy * Strong collaboration and alignment skills across multiple engineering teams and stakeholders from other deparments * Pragmatic, ownership-driven mindset with a focus on enabling others and reducing complexity * Strong engineering fundamentals in building secure, scalable, and reliable systems, including security-by-design, resilience patterns, and operating production systems at scale. WHAT WE OFFER: * State-of-the-art technologies and an agile environment (Check our Tech Radar: https://lotto24.github.io/tech-radar/) * A modern, dynamic culture grounded in the success of a leading-edge e-commerce company. * A talented team of ambitious, like-minded colleagues where your knowledge and ideas truly make an impact. * Ongoing personal growth, supported by an annual development budget of €1,500 to invest in your professional development. * Trust and autonomy, no micromanagement, just confidence in your ability to deliver and excel. * Flexible work options with a hybrid setup focused on results. * Unlimited vacation days in addition to your yearly 30-day vacation allowance. * Opportunity for workations abroad using our WorkFlex tool. * Monthly mobility allowance of €30 to use on the mobility option of your choice (e.g., the Deutschlandticket), plus access to a company bike leasing program. * Company pension scheme, provided in partnership with Degura, to support your future financial security. * Subsidized EGYM WELLPASS membership, with a contribution of only €25 per month, giving you access to a wide range of gyms and sports options across Germany. * Monthly company events, team activities, and informal gatherings, including our popular company-wide lunches provided four days a week.

RTB House

Location: [Poland]  We Are:  RTB House is a next-generation performance demand-side platform (DSP) that uses proprietary Deep Learning AI algorithms to help brands grow. The company is the market leader in driving performance using Deep Learning across the entire purchase funnel.  Founded in 2012, and now operating in 90+ markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients. Why RTB House? If you are looking for a place where you can really make a difference , then RTB House might be the right fit for you. The Bidding Platform organization is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. The Platform Engineering team, which this job advert relates to, sits within the Bidding Platform and owns the platform and infrastructure that our bidding applications run on — deployment, monitoring, databases, load balancing and Kubernetes. The team makes sure these foundations stay reliable and scalable under massive, low-latency load, and provides self-service tooling with clear usage contracts, so the vertical (business) teams can build and ship autonomously. The exact scope is likely to evolve over time as our platform grows in scale and complexity. You Will: * Lead, mentor, and grow a team of ~8–10 strong systems and backend engineers, fostering a culture of technical excellence and high code quality. * Own the vision and roadmap for the platform layer of the Bidding Platform - planning its evolution with platform efficiency, reliability, scalability and security as the guiding lens. * Take part in defining the team's evolving scope — as the platform grows, we anticipate the need for multiple platform teams, leaving meaningful room to shape the scope around the areas that interest you most. * Delegate ownership of whole platform areas (e.g. monitoring, deployment, security) to senior engineers advising and supporting them when needed. * Deliver the team's capabilities as self-service platforms with clear usage contracts. For example, in monitoring the team provides and operates the monitoring platform and defines the contract for using it - while creating individual metrics and watching them day-to-day stays with the vertical (business) teams that own the applications. * Base decisions on data - complex projects often require running experiments and gathering evidence before deciding * Take part in IT-wide capacity planning for further platform scaling. * Own the framework for dispatching on-call alarms to the right teams and drive the continuous elimination of noisy alarms. The lead does not need to take part in the duty rotation personally. Desired Experience:  * 2+ years in a technical leadership role (Team Lead / Engineering Manager), including leading project teams. * Strong previous hands-on background in distributed systems and systems engineering - deployment, monitoring, databases, and load balancing within large-scale infrastructure. The role is not about writing code day-to-day, but this background is essential to understand and lead the engineers. * Comprehensive understanding of complex IT systems spanning hardware, software, and algorithms. * Knowledge of concurrent programming and distributed systems. * Critical performance analysis skills - from theoretical estimation to production optimization. * Strong programming background and the ability to dive deep into code reviews when needed.. * Experience building platform capabilities as products for other engineering teams - defining clear usage contracts and best practices, and driving cross-team technical rollouts by enabling and guiding those teams rather than doing all the work yourself;  * Comfortable owning a technical area end-to-end and communicating across teams. * Self-directed, proactive approach. * C1-level English and Polish fluency. Selected Technologies:  You will have the autonomy to select the best tools for the job. The current stack includes: Java, Python, Kubernetes, Prometheus, Aerospike, Memcached, Google Cloud Platform, BigQuery, MinIO, Kafka, ClickHouse, PostgreSQL, Elasticsearch, Jenkins, Graphite. We Offer:  * Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard. * Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). * Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects. * Cooperation based on B2B contract. * You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow. Apply now!  You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.

Lottie

🏷️ Title: Lead Platform Engineer 👫 Department: Engineering, reporting to the CPTO 💰 Salary: £90,000 - £115,000 (depending on experience and seniority) 🎁 Benefits & Culture: Lottie’s careers page here. Lottie’s tech careers page here 📈 Equity: A very generous EMI share offering. 🌴 Holiday: 26 days + bank holidays. 💗 Mission: Elevate later life for everybody and build the care sector of the future. 💻 Office Policy: Hybrid with two core office days or remote. 🌍 Office Location: London Bridge, London, UK or remote, Europe. 🔍 The Opportunity: We're looking for a Lead Platform Engineer to own the infrastructure and security foundation that Lottie's engineering teams build on. This is a broad, high-ownership role. You'll be the person who keeps our cloud infrastructure running well, starts to own our security posture, and looks for ways to improve how our engineers experience the platform underneath them every day. It's not a narrow specialism - we want someone who is energised by the full scope, not just one slice of it. Lottie's infrastructure is modern, simple and intentional. Our services run on Kubernetes (EKS), deployed following GitOps practices with GitHub Actions and ArgoCD, and monitored with OpenTelemetry-powered logs, traces and metrics. Our cloud surface is split across AWS for compute and GCP for data (BigQuery), with infrastructure managed as code through Terraform. We prioritise pragmatism, stability and solving real problems over technology for technology's sake, and this key role owns the future direction of the platform, observability, security and infrastructure as a whole. You'll join as the sole owner of this function, which means real autonomy and real accountability. The work is consequential: Lottie is scaling fast, our products carry serious responsibility for the families and care providers who rely on them, and the platform needs to be in safe hands.   💻 What you'll be doing * Own Lottie's cloud infrastructure end-to-end - reliability, performance, cost, observability and developer experience * Champion an observability culture where engineers own what they ship - giving teams the dashboards, alerting and tooling to genuinely run their own services, not just deploy them * Set the guardrails for how we use AI safely - establishing security best practices and ways of working that let teams move fast with AI tooling without creating risk * Lead our information security accreditations, including ISO 27001 and Cyber Essentials - treating them as a chance to genuinely strengthen our posture, not a box-ticking exercise * Take genuine ownership of our security posture: auditing where we are, identifying gaps, and making pragmatic improvements over time * Work closely with engineering teams to understand what they need from the platform and build things that actually help them move faster * Evaluate and improve our IT and vendor setup, including potential managed service arrangements * We want someone who ties every infrastructure decision back to what it unlocks for the business - not building for the sake of technical interest   👀 We think you'll be a great fit if… * You're breadth-first: you'd rather own a wide area well than be the deepest possible expert in one narrow slice * You have solid experience in cloud infrastructure, DevOps, or platform engineering - hands-on with GCP, AWS, or both * You know Kubernetes deeply - not just deploying to it, but running it in production: scaling, debugging, upgrades, and the operational realities that only come from owning clusters yourself * You have real observability expertise - you've built monitoring, alerting and tracing that engineers actually use, and you know the difference between collecting metrics and creating insight * You're comfortable owning security even if it's not your deepest expertise today - you're curious about it, you know what good looks like, and you're willing to learn * You come from a startup or cloud-native environment and you understand the difference between building for scale and over-engineering * You have good judgment about what problems are worth solving - you're not chasing technical perfection for its own sake * You can work well with engineers across teams; you build platform that helps people, not just infrastructure that's technically correct Sound like you but not quite 100%? Apply anyway — we're looking for judgment and potential, not a perfect spec match.   💔 This role isn't for you if… * Our mission to elevate later life care doesn’t resonate with you. * You want to go deep in one specialism and leave the rest to someone else * Security feels like a different team's problem * You're most comfortable in a large, structured engineering org rather than a fast-moving startup * You'd rather build technically impressive things than pragmatically useful ones   🔢 Lottie's Interview Process 1. Talent Screen with Alice Rooke, Talent Lead (20 minutes, remote) 2. Interview with Julien Lavigne du Cadet, CPTO (45 minutes, remote) 3. Two one hour technical interviews with members of Lottie engineering team (2 hours, remote) 4. Behavioural Interview with one of Lottie’s Engineering Leaders (45 minutes, remote) 5. Final interview with Will Donnelly, Co-Founder & CEO (30 minutes, in person)   🤩 Candidate Experience The majority of feedback will be given via email and we try our very best to give specific and constructive feedback where possible. * Application Review: You will be informed of the outcome but will not receive specific feedback. * Talent Screen: You will be informed of the outcome but will not receive specific feedback. * Interview with Julien: If you are unsuccessful, you will receive constructive feedback via email. * Technical & Behavioural Interviews: If you are unsuccessful, you will receive constructive feedback via email and will be offered a debrief call with our Talent Lead. * Final Interview: For final-stage candidates who are not offered the role, we will provide feedback live via a phone call and offer written feedback.   🚀 Meet Lottie Founded with a mission to build the care sector of the future, Lottie is creating the AI operating system for social care — designed to fix care search for families and unlock profitability for care providers. Launched in London in July 2021, Lottie has raised over £25m from tier 1 venture capital funds (Accel and General Catalyst) and is widely recognised as one of Europe's fastest growing tech companies. Most recently, Lottie was the acclaimed winner of Deloitte Fast 50, LinkedIn Top Startups and Startups 100. As of today, Lottie offers three core products and services, including: * Lottie (B2B2C Marketplace) - Free service that helps families find the UK’s best care homes and home care services. Think Rightmove for care. * Found by Lottie (B2B Vertical SaaS) - AI-native CRM software supporting care providers to effectively manage their enquiries, occupancy and finances. * Seniorcare by Lottie (B2B Vertical SaaS) - Employee benefit helping companies deliver outstanding eldercare support to their employees. * Eliza by Lottie (B2B Vertical SaaS) AI agents that handle care home enquiries - so no family goes unanswered. Launch video here.   🤩 Why Lottie? * Career Opportunity - A chance to own platform engineering at one of the UK's fastest growing startups, with real scope to shape the function as the company scales. * Mission - Tech for good that aims to build the care industry of the future and positively impact millions of people's lives. Care is one of the final remaining large consumer industries yet to be disrupted by technology. * Investors - Series A backed having raised £25m+ from tier 1 VCs including Accel and General Catalyst. * Global Opportunity & Scalability - Be part of a company solving a real problem that every family around the world faces at some point in their life. * People - Join a kind, talented and mission driven team that loves coming to work every day. * Culture - Excellent employee compensation/benefits, hybrid office policy and outstanding company culture with a 5/5 Glassdoor score. * Award Winning - Acclaimed winner of LinkedIn's 2024 Top Startups, named the UK's number one startup for 2025, and voted one of the Best Places to Work by The Sunday Times 2026.   We want to create an inclusive environment that celebrates the diversity of our people whilst enabling them to do the best work of their careers. We are committed to ensuring that all our people processes are equitable. All applicants will be considered for employment without attention to ethnicity, religion, sexual orientation, gender identity, family or parental status, national origin, veteran, neurodiversity status or disability status. If you require reasonable accommodations during the application or interview process, please let us know at Alice.Rooke@lottie.org