
Justera Group AB · Solna
About Justera Group Justera Group AB is a leading Swedish IT consulting firm with great experience specializing in building high-performing technology teams and...
About Justera Group
Justera Group AB is a leading Swedish IT consulting firm with great experience specializing in building high-performing technology
teams and delivering end-to-end IT solutions. Led by dynamic female executives, Justera Group focuses on helping businesses
harness the power of digital technologies to continuously evolve in today’s rapidly changing economy. The company has deep
expertise in IT consultancy, software development, and recruitment services, providing clients with purpose-driven, well-trained
consultants who consistently deliver efficient and effective results. Justera Group manages the entire talent lifecycle, from
hiring to ongoing management, ensuring the right fit for each project on time and within budget. With their strong commitment to
quality, collaboration, and client success, Justera Group is a trusted partner for technology innovation across Sweden.
We are seeking an experienced Senior Data Scientist with strong expertise in Linear Programming (LP) and Mixed Integer Programming
(MIP) to develop, maintain, and scale production-grade optimization solutions. This role requires a solid foundation in
optimization, analytics, statistics, and machine learning, along with the ability to build robust, production-ready data science
solutions in a cloud environment.
The ideal candidate is an experienced Python developer who writes clean, modular, and maintainable code, possesses strong SQL
skills, and enjoys collaborating with cross-functional teams to solve complex business challenges.
scalable solutions.
model performance.
stakeholders.
improvements.
Programming (MIP).
Platform (GCP).
⚡️ What We Do Flower is Flexible Power. We are a next-gen energy company leveraging AI and machine learning to make renewable energy stable and always available – even when the sun isn’t shining and the wind isn’t blowing. Through smart optimization and trading of energy assets like wind and solar farms, battery systems, and EV chargers, we make renewable energy reliable and predictable, leading the charge towards the energy system of tomorrow. 🌟Who We Are Tech company at heart. Purpose-driven at core. Flower consists of a diverse group of innovative individuals with a strong desire to improve the state of the world. At Flower, we believe trust, collaboration and diversity are essential to not only create an inclusive work environment, but also drive career growth. By embracing varying perspectives, we allow creativity and progress to flourish. To accelerate towards our goal of becoming the pioneering force powering the energy system of tomorrow, we are now looking for a passionate and skilled Senior Data Scientist to join us! 👩💻 About The Role: As a Senior Data Scientist, you will shape the foundation of Flower’s short-term forecasting capabilities - powering the models that directly drive our daily trading decisions. You will be part of a small, highly skilled team operating at the intersection of data science, energy systems, and close-to-real-time market dynamics. You will own the full lifecycle of your models - from idea to production - working closely with Data Engineers, Machine Learning Engineers, and Energy Market Experts to ensure our forecasting stack runs smoothly and is continuously improving. This is a hands-on role focussed on time-series modelling, rapid experimentation, and the ability to translate data into high-impact operational decisions. What You’ll Do: * Build & maintain short term operational forecasting models for energy volumes & prices that drive our trading decisions on a day-to-day basis * Build time series models to understand and explain recurring patterns across different measurements, products and regions to distill signals as features for your next model * Prototype quickly: iterate on simple models, validate rigorously, and scale what works in a dynamic market environment * Own the full model lifecycle: EDA, feature engineering, model development, validation, deployment and continuous evaluation, supported by our team of DEs, MLEs & Energy Market Experts * Write your models in Python, version your code in Git, use CI/CD to ensure full reproducibility * Partner with DEs to evaluate and integrate new data sources (weather, grid conditions, market signals) * Collaborate & mentor across other data scientists, quants and engineers Who You Are: * Master’s or PhD in Statistics, Machine Learning, Computer Science, Industrial Engineering, Applied Mathematics, Engineering Physics, or a related quantitative field * 5+ years building and deploying time-series prediction models in production using machine learning or classical methods * Strong command of Python and no stranger to the command line; comfortable writing clean, maintainable, production-ready code * Deep understanding of time-series forecasting and real-world modeling challenges * Prior experience in energy markets or power systems * Strong mentorship and coaching skills * Highly driven by our mission and your impact, yet humble enough to know we are all always learning * Eagerness to apply yourself in a mostly automated trading floor environment * Thrive in a fast-moving environment and adapt models as markets evolve 📍 Location Our beautiful office is located in the heart of Södermalm, just a short walk from Slussen subway station. We encourage in-office collaboration but support a hybrid work model. ✉️ Apply Our corporate language is English, as we have over 30 nationalities in the office. We therefore appreciate it if you could submit your CV in English. Throughout the recruitment process you will meet with the Talent Partner, Head of Predictions and Optimization, the Team, VP of Engineering and VP of Product. We look forward to hearing from you! --- We kindly but firmly decline any engagement in recruitment assistance for our hiring processes. This includes partnership offers or the sale of recruitment tools.
SAVR is a fast-growing Swedish fintech company on a mission to reinvent investing. We empower investors with a platform that offers lower fees, greater transparency, and a radically improved experience. We’re not just building another investment service — we’re reimagining how financial products should work for people, not just institutions. As part of our ambitious, innovative and curious team, you’ll help shape the future of investing in Sweden and beyond. THE ROLE As a Senior Platform Engineer at SAVR, you will be part of our tech organization helping build and evolve the next generation investment platform. Your primary focus will be on designing, improving and operating our cloud platform, enabling our engineering teams to build, deploy and run services efficiently and securely. While this role is centred around infrastructure and platform engineering, you'll occasionally contribute to backend services and integrations where it creates the most value. You'll collaborate closely with Software Engineers, Data Scientists, Product Designers and Product Managers to build scalable solutions and continuously improve our developer experience. Our infrastructure is built on AWS and managed through Terraform, with CI/CD powered by GitHub Actions, alongside some GCP and a handful of third-party services. Our services are built in Kotlin, PHP and Python and run on ECS, with data in Aurora, PostgreSQL and Snowflake. As we continue to grow, so does the need for a cloud platform that is reliable, secure, observable and enjoyable to build on—and that's where you come in. YOUR MISSION * Own and evolve our AWS platform, including networking, infrastructure as code, deployment pipelines, observability, backups, cloud governance and cost optimization. * Drive technical improvements across cloud architecture, CI/CD, automation, developer experience and operational tooling, reducing toil through smart tooling and abstractions. * Collaborate closely with engineering teams to build cloud-native solutions, integrations and infrastructure that enable product development. * Support backend teams with infrastructure expertise and occasionally contribute to application development when needed. * Monitor, troubleshoot and optimize cloud environments for performance, reliability, security and cost efficiency. * Foster our learning culture by actively participating in feedback sessions, both receiving and providing constructive feedback on code and infrastructure changes. YOU’LL THRIVE IN THIS ROLE IF YOU... * Are a Platform Engineer or Software Engineer with strong experience building and operating cloud platforms. * Have solid experience with AWS, Terraform, CI/CD, Docker, ECS and/or EKS, and observability tooling. * Have 5+ years of professional experience designing, building and operating cloud-based systems in production environments. * Enjoy working in a startup environment where you can take ownership, solve a wide range of technical challenges and collaborate across disciplines. * Care about automation, operational excellence and building reliable systems that scale. * Have some backend development experience and enjoy working closely with application engineers. * Are fluent in English and either hold Swedish citizenship or a valid EU work permit (visa sponsorship is unfortunately not available). OUR CULTURAL DNA 🧠 Open-minded – we embrace new ideas, diverse perspectives, and continuous learning 🚀 Bold – we take smart risks, move fast, and aren’t afraid to fail forward 🤝 Honest – we value transparency, feedback, and doing the right thing We’re a startup, so things can be a little messy — and that’s part of the thrill. If you thrive in building as a team and handling uncertainty, you will fit right in. WHAT’S IN IT FOR YOU You’ll join a product- and design-driven company where your work has real impact. We keep things lean, move fast, and genuinely care about the experience we deliver — for customers and for each other. Here’s what we offer: 💻 Top-tier work gear 💰 Competitive salary 🏃♀️ Generous wellness allowance 🤒 Insurance package 🌱 Occupational pension and long-term savings support 🏢 Office-first approach to foster collaboration and quick decision-making — with flexibility when you need it (4+1) 🥗 Stocked pantry, plus regular social gatherings and wellness activities to keep energy and culture high OUR COMMITMENT TO DIVERSITY SAVR is an equal opportunity employer. We welcome people from all backgrounds, identities, and experiences. We believe diverse teams build better products and are committed to creating an inclusive workplace where everyone can thrive. READY TO JOIN US? We’d love to hear from you. Apply now or reach out with any questions — and let’s build something meaningful together.
OM BOLAGET Vår kund är ett snabbväxande AI-bolag i Stockholm som använder computer vision och maskininlärning för att revolutionera hur världens infrastruktur underhålls. Deras teknik analyserar och effektiviserar processer inom vägunderhåll – en bransch där det globalt läggs över 500 miljarder dollar årligen på reparationer. Med kunder i Norden, Europa och samarbeten med internationella organisationer växer bolaget snabbt. Bolaget är kassaflödesneutralt och självfinansierat med långsiktiga investerare. Här bygger du inte bara en produkt – du bygger något som gör verklig skillnad för samhällen runt om i världen. ---------------------------------------------------------------------------------------------------------------------------------- OM ROLLEN Vi söker en Senior Software Engineer med ledaregenskaper som vill äga backend, arkitektur och infrastruktur i ett litet, högpresterande team. Det här är en hands-on utvecklarroll där du får stort ägandeskap och frihet att forma både produkt och tech-stack. Du kommer jobba tätt med en data scientist och en frontendutvecklare, och vara den som tar lead på plattforms- och backend-utvecklingen. Du behöver inte förstå maskininlärning – men du ska kunna bygga robusta system som exponerar AI-modellernas resultat mot användare och kunder. ---------------------------------------------------------------------------------------------------------------------------------- VAD DU KOMMER GÖRA * Designa och utveckla backend-tjänster och API:er (Python/FastAPI) * Äga Infrastructure as Code (Terraform) och säkerställa skalbara deployments (Docker, Kubernetes, Helm) * Bygga bryggor mellan AI/CV-modeller och kundgränssnitt * Driva arkitekturbeslut och tekniska vägval * Mentorera och stötta teamet – vara den som sätter standard för kodkvalitet * Bidra till att bygga en skalbar plattform för internationell expansion ---------------------------------------------------------------------------------------------------------------------------------- VEM VI SÖKER Must-haves: * Erfarenhet av tungt backend-framework (Spring Boot, Django, C#/.NET, FastAPI, Symfony eller liknande) * Docker, Kubernetes och Helm * Terraform eller annan Infrastructure as Code * PostgreSQL / stark SQL-erfarenhet * Microservicearkitektur * Git och CI/CD * Svenska och engelska i tal och skrift * Personlighet: Självgående, tar ägarskap, stöttar andra, trivs med frihet under ansvar Meriterande: * Azure * PostGIS / GIS-databaser * Eventdriven arkitektur (AMQP, MQTT) * React / frontend-förståelse * AI, maskininlärning eller computer vision (nyfikenhet räcker) * Erfarenhet från startup/småbolag ---------------------------------------------------------------------------------------------------------------------------------- VAD VI ERBJUDER * Teknik som förbättrar infrastruktur globalt, inte "hållbarhetsprat" utan konkret skillnad * Stor frihet i att forma produkt och tech-stack, driva arkitekturbeslut * Litet team, stor påverkan, korta beslutsvägar, noll byråkrati, hög teknisk nivå * Internationellt bolag med kunder i Norden, Europa och samarbeten världen över * Konkurrenskraftig lön och möjlighet till equity/optioner efter provanställning * Office-first i centrala Stockholm (måndag–torsdag på kontoret, fredag flexibelt) ---------------------------------------------------------------------------------------------------------------------------------- PRAKTISK INFO * Plats: Stockholm (kontor i centrala stan) * Anställningsform: Tillsvidareanställning * Start: Så snart som möjligt * Lön: Marknadsenlig, anpassas efter erfarenhet * Språk: Svenska och engelska (krav) REKRYTERINGSPROCESS 1. Första samtal med Lynqa 2. Intervju med teamet – teknik och kultur 3. Fördjupad teknisk intervju 4. Referenstagning 5. Erbjudande OM ANSTÄLLNINGEN Omfattning: Heltid, tillsvidareanställning Start: Enligt överenskommelse Placering: Stockholm Detta är en direktrekrytering. Lynqa ansvarar för rekryteringsprocessen. OM LYNQA Lynqa är din karriärpartner inom tech. Vi arbetar med utvalda produktbolag och techteam i framkant – roller du sällan ser på vanliga jobbsajter. Hos oss får du snabb återkoppling, en personlig kontakt och tillgång till möjligheter innan de annonseras. Nyfiken på vad som finns? Hör av dig till mischell@lynqa.se Lynqa – we connect people