Staff Engineer, Seller Systems

Sellhelp AB

We put items to better use. Hundred thousand a week actually. Enhancing our technical product is therefore at the top of our agenda. The scale of our operations creates complex, fascinating challenges. We thrive on engineering simple, elegant solutions to tackle them, and we are looking for someone whose craft can make a tangible impact on our rapidly growing customer base. Sellpy’s vision is to empower everyone to live circularly. We believe that every item deserves a second life, and we see huge financial, social and environmental value in making sure this happens. We look for those who share this vision and have the grit to tackle the challenges of building a circular future. Fullstack Engineer at Sellpy Sellpy serves both buyers and sellers, and both sides matter equally. As part of Sellpy Tech, you'll help hundreds of thousands of customers embrace a smarter, more sustainable way to shop. This is work that actually moves the needle on something that matters. We're looking for a Fullstack Engineer who cares about the customer experience and wants to push our technical product forward. This role is a great fit if you want to go deep on JavaScript, enjoy technical discussions, and thrive on real, varied challenges every day. Your ability to build features that integrate cleanly with our architecture and hold up in production is what makes the difference. We code for a circular future — and we build it together. Debates are welcome, opinions are expected, and everyone has a real say in how we shape Sellpy's architecture. In short, you will Build user-centric, next-generation web applications Work with JavaScript, React/React Native & Node across the stack Take ownership of features from idea to release and beyond Ensure scalability, maintainability and simplicity in everything you build Continuously improve Sellpy’s products and architecture Requirements B.S. or M.S. in Computer Science (or related), or equivalent proven experience 3+ years of professional software engineering experience Strong knowledge of JavaScript Experience from a fast-paced product environment Fluency in written and spoken English We’d be impressed if you have Experience with React, React Native, Node.js, Web Components, logging & monitoring Worked in a scaling, product-focused startup Hands-on experience with continuous integration & deployment Knowledge of AWS and Git You get to Be part of a tech-minded company that's driving the change towards a sustainable lifestyle. In return, you will get direction, energy, and work on meaningful challenges daily. Enjoy a vibrant office culture at Medborgarplatsen, balanced with hands-on experience at our production sites Work with highly skilled and motivated colleagues Gain new skills with unlimited access to a learning platform Make use of prepaid vacation Enjoy Sellpy credits and staff discounts at Sellpy and the H&M brands (Arket, COS, Other Stories, Weekday and more). Save up with a monthly pension plan Engagement in Sellpy’s social traditions with game nights, interactive planning days, guest speakers and other activities. Location On-site collaboration at our core, supported by a flexible hybrid setup on set days. This specific role is based at our Medborgarplatsen office. Hybrid work We value being together. After an on-site onboarding, we aim for a balanced office presence, with flexibility based on your team and tasks. Form of employment: Full-time Start: As agreed upon Öppen för alla Vi fokuserar på din kompetens, inte dina övriga förutsättningar. Vi är öppna för att anpassa rollen eller arbetsplatsen efter dina behov.

Low Noise Factory AB

Introduction Ever dreamed of working for a trailblazing company crafting the coolest high-tech parts on the planet? Imagine being part of an environment that heavily invests in creating a one-of-a-kind workspace for its team. Picture a melting pot of diversity and unmatched expertise that you won't find anywhere else. Intrigued? Keep reading to discover how you can join our extraordinary team! About Low Noise Factory Low Noise Factory (LNF) designs and produces the world’s best low noise microwave amplifiers. These amplifiers are used near absolute zero –cryogenic– temperatures for space exploration, quantum computing, radio astronomy, and for various ground-breaking scientific endeavors where extreme sensitivity is paramount. Our amplifiers help receive signals from the most distant man-made object from Earth, the Voyager 1 space probe, help read quantum states in the fastest quantum computers. Low Noise Factory’s state-of-the-art amplifiers are far ahead of the competition. We invest heavily in research and collaborate closely with academic and scientific communities to keep advancing our technology further and further. Our success is the result of passion for science and precision, advanced by devotion and curiosity. As explorers on the technological frontier, our aim is to keep making the impossible possible. We do everything from basic research to product development, production and testing. In our 1500 sqm facility in Gothenburg we have a state-of-the-art laboratory with electronics assembly all the way to high frequency cryogenic testing. In addition, we have access to advanced cleanrooms where we develop and produce our semiconductor circuits. LNF has 25 employees with a background from 15 different countries. Job description and responsibilities We are currently looking to expand our R&D department with a Staff Engineer. In this role you will be working closely on the different stages of our products with strong cross-department responsibilities. We are looking for individuals with a broader profile and a solid background in microwave engineering. Additional relevant skills are highly regarded assets for the position. We welcome applications from experienced professionals as well as new graduates with the relevant background. Your responsibilities will be varied and tailored to your expertise and product needs. The main activities will revolve around new product development, device characterization, and product support. You are expected to actively contribute to a wide range of aspects of our products and be a bridge between different parts of the organization and other stakeholders. A part of your time will also be dedicated to customer communication, problem identification, and product repair, providing valuable insights into field usage of our products and understanding of how to build and service them. Some of the possible tasks within this role include: Semiconductor devices Device evaluation Reliability testing Transistor modeling Product development Design of new products such as LNAs, MMICs, PCB boards, and RF modules Application engineering Measurement Verification and validation Test system improvement and customization Data extraction and analysis Requirements and qualifications M.Sc. or B.Sc. degree in electrical engineering, microwave and wireless, nanotechnology/semiconductor processing, or a similar field. Proficient in written and spoken English. Solid knowledge of RF and microwave engineering. Broad interest in different aspects of the product lifecycle. Attentive to details, with a problem-solving and team-player attitude. Valuable additional skills Experience with RF design tools such as Microwave Office, HFSS, or others. Experience in assembly, such as soldering and bonding. Hands-on experience with RF measurement equipment, such as VNA. Experience in mechanical CAD design. Interest in end-to-end design, from simulation to productization. Experience in customer relations and communication. Experience with cryogenic equipment and/or cleanroom environments. Benefits and terms Fulltime 40h/week Flexible work hours 30 days’ vacation per year Occupational pension Generous bonus system Health maintenance benefit (Friskvårdsbidrag) Private medical treatment insurance Food benefit Workplace The position is full time and located at the Low Noise Factory main office at Nellickevägen 24, Gothenburg, Sweden. How to apply Send your application to career@lownoisefactory.com. Last day of application: September 30, 2026.

Adyen

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition.  For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. Staff Engineer - Financial Products WHO YOU ARE * Must have: * 2+ years of experience in the financial industry, preferably in the banking or fintech sector; * 10+ years of hands-on development experience in a modern engineering environment; * Technical leadership experience, including mentoring engineers and leading an engineering strategy; * Hands-on experience designing and building large scale distributed systems; * Strong background and hands-on experience coding with Java; * Platform mindset. Able to generalize complex processes and create simple and flexible services to support multiple products; * Proactive relationship-builder with strong communication skills and the ability to work closely with diverse stakeholders across cultures; * Self-starter who can identify problems and figure out solutions     This role's annual base salary range is $235k–$317k, plus RSUs. To learn more about our compensation philosophy, please click here.   Our Diversity, Equity and Inclusion commitments  Our unique approach is a product of our diverse perspectives. This diversity of backgrounds and cultures is essential in helping us maintain our momentum. Our business and technical challenges are unique, and we need as many different voices as possible to join us in solving them - voices like yours. No matter who you are or where you’re from, we welcome you to be your true self at Adyen.  Studies show that women and members of underrepresented communities apply for jobs only if they meet 100% of the qualifications. Does this sound like you? If so, Adyen encourages you to reconsider and apply. We look forward to your application!   What’s next? Ensuring a smooth and enjoyable candidate experience is critical for us. We aim to get back to you regarding your application within 5 business days. Our interview process tends to take about 4 weeks to complete, but may fluctuate depending on the role. Learn more about our hiring process here. Don’t be afraid to let us know if you need more flexibility. Adyen is an equal opportunity employer. We do not discriminate based on race, color, ethnicity, ancestry, national origin, religion, sex, gender, gender identity, gender expression, sexual orientation, age, disability, veteran status, genetic information, marital status or any legally protected status. All your information will be kept confidential according to EEO guidelines. You must be work authorized in the United States without the need for new visa sponsorship. The company can support visa transfers but will not sponsor individuals for H-1B CAP applications.