Fullstack Product Engineer (Learn & Agents)

Hemnet

At Hemnet, we build one of Sweden’s most widely used digital services. Every day, we help people navigate some of life’s biggest decisions, and that brings high expectations for quality, reliability, and long-term thinking. We’re now looking for a Fullstack Developer to join our B2B & Seller Domain. This team builds products and services that help homeowners and agents make the most of their opportunities in the housing market. About the role 🍏 You’ll be part of an experienced, cross-functional team working across both user-facing features and backend systems. You’ll contribute through hands-on development, technical leadership, and close collaboration with Product Managers, Designers, Analysts, and Engineers. Together, you’ll build solutions that create real value for sellers. You’ll design, build, and maintain scalable backend services using Ruby, Node.js and Nest.js, contribute to frontend development in React, and support and evolve APIs across GraphQL and REST. You’ll also play an active role in our transition toward a more service-oriented architecture, helping break down complex problems and move monolithic systems into modular services over time. Beyond day-to-day development, you’ll take part in technical discussions, contribute to architectural direction, support other engineers through collaboration and knowledge sharing, and help us continuously improve code quality, performance, and developer experience. We also hope you’ll contribute to a team culture where different perspectives are valued and people can grow together. Who we think you are 🤩 Our current stack includes Ruby and Node.js on the backend and Next.js on the frontend. You’ll work with Ruby in this role, but we don’t expect you to know everything from the start. We think you’re an experienced engineer who enjoys building production-grade systems and working through complex problems together with others. You care about code quality, maintainability, and creating solutions that hold up over time. You’re comfortable contributing to technical decisions, and you like collaborating across disciplines to build products that are useful and thoughtful. You don’t need to tick every box on day one, what matters most is that you bring solid engineering experience, a learning mindset, and a generous way of working with others. What you’ll do 💥 * Build and improve Hemnet’s products across the system. * Take part in technical discussions and architectural decisions * Work closely with product, design, and analytics. * Contribute to a sustainable pace, high quality, and a great developer experience. * You’ll use AI tools as part of your day-to-day work, for example to explore ideas, speed up implementation, improve code quality, and support learning and collaboration across the team. I am your new manager 👋 Hi! My name is Tomas, and I’ll be your new manager. I’ve been at Hemnet since 2022 and am currently working as Engineering Manager in our domain called B2B & Sellers. I’m really excited to support the teams that will be working on many new and important areas for Hemnet, including building tools and products for agents to help them make more informed decisions. My leadership style is listening, transparent, accessible, and supportive, while also challenging you to take your next step. Hopefully, we’ll learn a lot from each other and have plenty of fun as we break new ground at Hemnet. As a team, we get things done; we know when and where value can be added, and we’re clear on our priorities. Why did I decide to join Hemnet? I was strongly drawn to the culture and atmosphere – a wonderful combination of kindness, inclusiveness, and helpfulness, paired with high ambitions and a strong drive forward. My impression is that the people and the workplace together create the perfect foundation for you to do the best work of your career. A Note on Inclusion 💚 At Hemnet, we believe that diversity in gender, sexual orientation, ability, neurodiversity, cultural background and life experience makes us stronger. We welcome applicants of all identities and backgrounds. If you meet many but not all of the requirements, we encourage you to apply. We value curiosity, a strong sense of purpose and the motivation to learn and grow, alongside your skills and experiences. A Hybrid Way of Working 🚲 Our vibrant office in central Stockholm is the hub of our collaboration and culture, providing a lively space that fosters team spirit. We come together in the office three days a week, with two flexible remote days. To be part of our team, it’s essential to be based in or near Stockholm. Please note that we're unable to provide relocation assistance for this opportunity.

Umain AB

At Umain, we're not just creating software; we're crafting the future, one innovative project at a time. With our motto "Shape, Ship, Scale," we empower our team to not only envision the future but also play a pivotal role in building it. We're a dynamic team where you can shape the future, ship groundbreaking solutions, and scale your abilities in many different ways. We're on the lookout for developers ready to join us in this journey, bringing passion, creativity, and dedication along with them. The role is ideal for engineers with demonstrable skills in AI as well as for software engineers who have recently transitioned to AI and ML expertise, and offers an opportunity to develop your craft whilst working closely with clients on delivering AI solutions to real-world challenges. We are seeking an AI Engineer with experience in building robust, scaleable, AI powered solutions. The ideal candidate combines a product engineering mindset with a deep enthusiasm for advancing AI capabilities. They demonstrate a great understanding of core AI concepts, product development workflows, and embodies team spirit. As an AI Engineer at Umain, your role will involve: Assisting our clients in clarifying their questions and determining if using AI is a suitable solution for them You understand the limitations of a model and how to address them within the product's UX Experience architecting agentic solutions (context, memory, and tool/skill handling) and implementing them using frameworks such as Mastra, Microsoft Agent Framework, LangChain/LangGraph. Applying stochastic test casing and trace-based reasoning to evaluate, test, and improve agent behaviour, supported by observability tooling (Langfuse, Promptfoo, etc.). Understanding and applying core AI concepts such as redlining, document chunking for accuracy, efficient use of embeddings, and debugging AI systems Validating, deploying, monitoring, and maintaining built models, ensuring they can be used at scale Developing and maintaining end-to-end data pipelines and machine learning workflows, optimizing for performance and reliability Working with diverse, cross-functional teams on projects that deliver groundbreaking AI solutions for global brands We also welcome experienced software engineers looking to transition into AI: Strong product development background with several years of software engineering experience Active engagement in AI (agents, wrappers, context engineering) Knows how to work efficiently in a product/engineering team Who You Are: We value candidates who demonstrate: Great delivery skills: Proven capability to deliver AI solutions Strong AI intuition: A deep understanding of AI concepts Curiosity: Enthusiasm for emerging technologies, creativity in problem-solving, and an eagerness to learn in a rapidly evolving AI landscape Full-stack product thinking: Frontend or backend experience outside the traditional AI field, with the ability to build end-to-end You're a developer with a passion for innovation and a knack for problem-solving. You're eager to learn, grow, and take on new challenges. You value collaboration, diversity, and the opportunity to make a significant impact. You believe in the power of technology to shape the future. What We Offer: A chance to work closely with global brands on a range of diverse and unique projects that explore and truly push the boundaries of what's possible. A fun and fair work environment where you have the opportunity to expand your skills through unique challenges and fantastic colleagues. A personal coach, and a setting where you can grow professionally and personally. Being part of multidisciplinary teams, participating in agile teams, being an important player in a highly ambitious setting. Why Umain? Career Framework: We believe in fairness and clarity, which is why we've established a transparent career framework to ensure equal pay and equal opportunities for all. Your growth and success are as important to us as they are to you. Together with your coach, you will build your own development plan and grow in your career. Work-Life Balance: At Umain, diversity is our strength. We understand that life doesn't pause when you walk into the office. That's why we've cultivated an environment that supports an excellent work-life balance. We welcome team members from all walks of life, recognizing the richness that different backgrounds, ages, and life stages bring to our team. We're committed to supporting each other, encouraging a healthy work-life balance that respects your needs, whether it's taking care of your family, your pets, or yourself. Innovations and Learning: Technology is always evolving, bringing new challenges and opportunities for collaboration and learning. Our developers work closely with designers, analysts, testers and more to tackle these challenges head-on, sharing knowledge and growing together. Skills Over Degrees: We're more interested in what you can do than in the diplomas you hold. Talent, drive, and creativity are what count at Umain. Here, you'll find opportunities to grow, learn, and excel in your career, regardless of your educational background. If you have the ambition and commitment to succeed, we have the environment and resources to support your journey. Background Check: Umain conducts a background check for final candidates in accordance with our internal policies. The check is carried out only with your consent and is ordered by our CISO through our approved screening partner. The scope of the check depends on the role level. This step is performed late in the recruitment process and is used solely to support a secure and fact-based hiring decision.

Lovable

TL;DR Most engineering leadership roles ask you to trade the craft for the title. This one doesn’t. We’re hiring engineering managers who run organizations of 30+ and still know what their strongest engineers are working on this week. You’ll think end-to-end about the business, lead a workforce of humans and AI agents that’s rewriting what an engineering org even looks like, and stay close enough to the code to drop in as a tech lead when a problem demands it. WHY LOVABLE? Lovable lets anyone and everyone build software with any language. From solopreneurs to Fortune 100 teams, millions of people use Lovable to transform raw ideas into real products — fast. We’re at the forefront of a foundational shift in software creation, which means you have an unprecedented opportunity to change the way the digital world works. Lovable-built applications and websites are visited hundreds of millions of times a month, and our enterprise footprint is compounding fast. And we’re just getting started. We’re a small, talent-dense team building a generation-defining company from Stockholm. We value extreme ownership, high velocity, and low-ego collaboration. We seek out people who care deeply, ship fast, and are eager to make a dent in the world. WHAT THIS ROLE IS AND WHAT IT ISN’T * It is a senior engineering leadership role with scope. You’ll run an organization that spans product, platform, and applied AI - with other managers, senior engineers, and AI agents reporting in - and you’ll be accountable for what that organization ships, how it operates, and the business outcomes it drives. * It is still close enough to the work that you can drop into a Tech Lead role on a hard problem when the situation demands it. We don’t measure leadership IC time as a percentage. We measure it as the ability to pick up the work and ship at the bar you’re asking of your team. * It isn’t a role for managers who think of themselves as engineering-adjacent. You need to be credible in code, design, and on-call - and you need to want to be. * It isn’t a role for leaders who only think about engineering. We expect you to reason end-to-end about the business - economics, product, GTM, customers - and to make calls that are best for the company, not just best for your team. WHAT WE’RE LOOKING FOR * 15+ years of engineering experience, including 6+ years of people management at a pre-IPO startup, scale-up or frontier tech company, and at least 2 years of managing managers. Strong IC track record before management. * You’ve run an engineering organization of 30+ with managers and senior engineers reporting in. You can speak concretely about how you structured the org, how you hired up to that scale, and what you’d do differently. * Still hands-on at the Tech Lead level: you can pick up an unfamiliar codebase, design and ship a non-trivial change, run an incident, and review code at a high bar. You haven’t let your engineering muscle atrophy. * You’ve thought hard about humans and AI agents on the same team. What humans should and shouldn’t delegate. How productivity gets measured when the unit of work is shifting. Strong opinions, lightly held. * Comfortable navigating ambiguity and driving clarity at an organisational level, not just technically. You write the doc that aligns three teams instead of waiting for someone else to. * Deep technical credibility in at least one area - full-stack product (React/TypeScript + Go/Rust), platform and developer experience (Kubernetes, sandboxing, observability, CI/CD, application frameworks), or applied AI (training, evals, agent systems, model serving). * Cross-functional to your core and business-fluent: you work seamlessly across design, product, and go-to-market, and know how to bring people along with you; andable to reason end-to-end about unit economics, product strategy, GTM, and customer outcomes * Track record of building and growing teams: you’ve hired senior engineers others wanted to work with, grown managers under you who became great in their own right, and set up career growth and performance practices that didn’t require constant maintenance. People follow you between companies. * Based in Stockholm or London or ready to relocate — this is an on-site, 5-days-a-week role. WHAT YOU’LL DO In one sentence: Run the engineering organization that builds Lovable - humans and agents both - and stay close enough to the work to be the senior engineer in the room when it matters. * Lead engineering. Product, platform, and applied AI under one roof. Own the roadmap and the business outcomes the org is on the hook for. * Set technical direction across the org: drive the design docs and architectural decisions that span teams, push back hard on weak plans (including your own), and hold a high bar for what ships. * Shape engineering culture: how we ship, how we write code, how we hire, how we deploy agents. Set norms that outlast any single project. * Ship fast: at Lovable the question is always “how fast can we get this to users?” You bias toward production and pull research, prototypes, and experiments into reality on the order of days and weeks, not quarters. * Build the operating model for an engineering org where humans and AI agents work side by side. We’re inventing this in public, and you’ll set the patterns the rest of the company learns from. * Operate as a peer to the executive team. Own outcomes that span beyond engineering, make the company’s biggest calls alongside the rest of leadership, and translate them back into engineering work that matters. OUR TECH STACK We’re building with tools that both humans and AI love: * Frontend: React, TypeScript * Backend: Go and Rust * Cloud: Cloudflare, GCP, AWS, many LLM providers * Data: ClickHouse, Firestore, Spanner, BigQuery * DevOps & tooling: Kubernetes, gVisor-based sandboxing for agentic workloads, GitHub Actions, Grafana, OpenTelemetry, Terraform * Local tooling: Nix, DevEnv And always on the lookout for what’s next. ABOUT YOUR APPLICATION * Please submit your application in English — it’s our company language, so you’ll be speaking lots of it if you join. * We treat all candidates equally — if you’re interested, please apply through our careers portal.   READY TO JOIN US? Help us unlock human creativity and build the future of software creation.