Experience Report
Charging Up My Career: Engineering Battery Algorithms in Sweden
Surya B., Renewable Energy and E-Mobility (M.Eng.), Sweden, Husqvarna Group, Summer Semester 2026
Notes on Search for Internship & Application Process
Before starting your search, it is crucial to definitively choose the specific engineering domain you want to work in. To find the best opportunities, I highly recommend using AI as a research partner. I used Gemini to run precise, recursive methodology searches to uncover niche potential internships and thesis openings across Europe that traditional search engines missed. The application process itself was simple. A major tip for the contract phase: always ask for potential corporate benefits (such as travel allowances, subsidized food, or housing support) and ensure they are officially signed into your contract before you begin.
Preparation & Critical Visa Regulations (Non-EU Students)
For international (non-EU) students, handling your visa correctly is your highest priority. A standard German residence permit only allows you to stay in another Schengen country for a maximum of 90 days within a 180-day period. Because this internship exceeds 90 days, you must apply for a Swedish visitor’s residence permit before you arrive. Do not risk overstaying the 90-day limit on a German permit; if you are offered a full-time job later, the Swedish Migration Agency will heavily scrutinize your residential history, and an illegal overstay can jeopardize your future work permit. To get the Swedish permit, you must prove you can support yourself. If your employer is paying you a lump sum at the end rather than a monthly salary, you can use your Erasmus+ grant as your official proof of income. The HOST outgoing coordinators are incredibly helpful in providing the necessary funding proof if requested.
Finding Accommodation & Infrastructure
Start looking for housing at least three months in advance. Legitimate housing platforms like Qasa are highly recommended for Sweden. When renting, always insist on a video call with the landlord to verify the property, and absolutely never transfer a deposit or rent money until a formal contract is signed. To avoid isolation, I specifically chose a shared apartment with housemates, which I highly recommend for incoming international students.
Culture & Daily Life
The culture in Sweden is incredibly friendly, flat-hierarchical, and welcoming. English is spoken universally at an advanced level, making integration effortless. Summer in Jönköping is phenomenal; the city has a vibrant nightlife, and people spend almost all their time outdoors. While I did not experience the deep winter, it is known to be much colder than in Germany.
Infrastructure, Banking & Subscriptions
Sweden is heavily digitized, which presents a unique challenge: you need a Swedish Personnummer (personal identity number) to access local digital subscriptions and the ubiquitous mobile payment app, "Swish." For everyday banking, if your German bank (e.g., Sparkasse) charges foreign transaction fees for converting Euros to Swedish Krona, avoid using it. Instead, rely on modern digital banking alternatives like Wise or N26, which offer extremely cheap currency conversion and zero-fee card payments for daily expenses.
Leisure, Environment & Infrastructure
Jönköping is brilliantly integrated with nature. It doesn’t feel like an overly dense metropolis, and the infrastructure accommodates both cars and excellent public transit (JLT). I spent my leisure time hanging out with my housemates, going out for drinks, bowling, and having dinners in the city. The nature is unparalleled—I did a lot of hiking around the Huskvarna hills and Lake Vättern. No matter your interests, there is a club for it: bouldering, traditional gyms, sailing classes, fishing, and even hunting/shooting clubs are all readily accessible.
The Internship & Work Environment
At Husqvarna Group, I was embedded in the Battery Competence Center. My core responsibility was developing diagnostic pipelines and automated key performance indicator (KPI) extraction algorithms for lithium-ion cell test data, culminating in a diagnostic software engine named "LiVerdict." The working environment was highly collaborative. I was also incredibly fortunate that my manager proactively approached me regarding my future plans, which ultimately resulted in me securing a full-time role as an Algorithm Developer at the company starting after graduation.
Tips & Tricks
- Ask for a Job: Do not wait to be approached. A thesis placement is the best possible six-month job interview. If you want to stay, proactively ask your managers about potential full-time opportunities.
- Mecenat Card: Apply for the "Mecenat" student ID online immediately. This unlocks massive student discounts across Sweden, including for JLT public transport.
- Combatting Loneliness: Move into a house with other students or housemates, and join local clubs (sports, sailing, outdoors) right away to build a social circle.
- Leverage TOOLS work efficiently: Use AI tools for deep-dive research e.g. Gemini, use NoteBookLM for learning, use MIRO for visualisation and mind map and connections, Extra Tools I used has incredible values are, Antigravity local Agent Manger, IDE – VS Code & Antigravity link it to the Obsidian Vault for notes and Agent memory.
Conclusion
This traineeship was a pivotal academic and professional milestone. It allowed me to apply advanced battery electrochemistry directly into industrial data architecture while experiencing life in a highly innovative, nature-friendly Scandinavian setting. I thoroughly recommend an Erasmus+ placement at Husqvarna Group to future students of the REEMM program.