Senior Software Engineer (Java) | Contract (Lithuania-based) at WISE INTEGRATION (Vilnius, Lithuania / Kaunas, Lithuania)

WISE INTEGRATION· Vilnius, Lithuania / Kaunas, Lithuania· €50–€60/hr·1d ago

Role details

Salary

€50–€60/hr

Work type

Hybrid

Job description

The role focuses on leading complex projects, driving strategic improvements, and mentoring development teams.

Key responsibilities:

Advanced Software Development: Lead the design and implementation of complex software applications, ensuring optimal performance and scalability.
Technical Leadership: Produce in-depth technical documentation and provide guidance to junior developers.
Strategic Bug Resolution: Lead efforts to identify and resolve complex bugs, improving software integrity.
Cross-functional Collaboration: Collaborate with various departments to ensure software solutions meet business needs.
Mentorship and Process Optimisation: Mentor junior team members and drive initiatives to refine development processes.

The consultant will:

Develop and improve cloud-native systems which are at the heart of a major Nordic financial institution.
Leverage technical freedom, make and own decisions to improve our systems.
Work with Java, Kafka, Elasticsearch, MS SQL, gRPC, REST, Kubernetes, and other cloud-native products.
Continuously develop his/her own and his/her team’s capabilities and ways of working.
Closely collaborate with the team, business users, and other teams inside the bank.

Requirements :

High proficiency in Java and tools supporting Java development.
Experience in development and continuous improvement of cloud-native systems.
Ability to take ownership and responsibility to carry out deliveries in a structured manner.
Experience with messaging systems such as Kafka, MQ.
Positive, proactive attitude, DevOps mindset, ability and motivation to learn.
Good communication skills and fluency in English.

Culture: Emphasizes innovation, respect, diversity, and service. Described as “stimulating, supportive, collaborative, and inclusive” with a global team encouraged to contribute.
Work Policy: Hybrid workspace (employees combine remote and on-site work). Typical on-site presence expected.
Team & Growth: Fast-growing deeptech startup with a small, cross-functional team (30–40 people) across three continents. Opportunity to have high impact.
Locations: Offices in Hyères and Grenoble (France), Ottawa (Canada), and Taipei (Taiwan). International exposure.
Tech Stack: Work with C, Python, LabVIEW, MATLAB, Altium, Linux, and signal processing tools.

One-liner: Wise Integration is a fabless semiconductor company that develops gallium nitride (GaN) power ICs and digital control firmware to make power converters dramatically smaller, lighter, and more energy-efficient.
Entity Type: Private (Series B, raised $16.2M total)
Headquarters: Hyères, France (with offices in Grenoble, France; Ottawa, Canada; and Taipei, Taiwan)
Founded: 2020 (spinoff from CEA-Leti)
Founders: Ghislain Kaiser (CEO), Thierry Bouchet (CTO), Rym Benaboud Hamoumou (Chief Corporate Marketing & Strategic Communication)

Primary industries: Power electronics, semiconductors, GaN (gallium nitride) integrated circuits.
Target customers: B2B – manufacturers of consumer electronics chargers, data center power supplies, industrial equipment, light e-mobility, and automotive systems.
Mission: To push the boundaries of power conversion through GaN technology and advanced digital control, contributing to more efficient and sustainable power electronics.

WiseGan® Power ICs: Gallium nitride integrated circuits that enable high-frequency, high-efficiency power conversion in a compact footprint.
WiseWare® Digital Control Firmware: Software-defined digital control that optimizes the performance of WiseGan ICs, enabling smaller size, better efficiency, and higher reliability.
Co-packaged GaN Digital Controller (in development): A next-generation solution combining GaN power stage and digital control in a single package, targeting AI data center infrastructure and other high-density applications.

Valuation / Market Cap: Not publicly disclosed.
Key Metric: Total funding of $16.2M (Series B closed February 2024, led by imec.xpand).
Notable Investors / Partners: imec.xpand (lead investor), KEC, Powernet (partnership for AI data center power architecture). Additional investors from earlier rounds (Corporate Round, Non Equity Assistance, Venture Round).
Growth Signals:
- Headcount of 32–40 employees, growing +32.3% YoY.
- 6th anniversary celebrated in February 2026.
- Strong IP portfolio and strategic partnerships with Korean companies KEC and Powernet for AI data center applications.
- Recent news (June 2025) about co-packaged GaN digital controller plans.

Integrated GaN + Digital Control: WiseGan and WiseWare are designed to work together, offering a holistic solution that competitors often deliver as separate components.
High-Frequency Architecture: Enables dramatic miniaturization and efficiency improvements in power supplies.
Proven Team: Leadership with deep experience in deeptech (CEO co-founded Docea Power, acquired by Intel; CTO from CEA-Leti).
Strong IP Foundation: Spun out from CEA-Leti, a world-class semiconductor research institute, with a growing patent portfolio.

AI Data Center Infrastructure: Partnering with KEC and Powernet to bring software-defined GaN power to high-density AI servers.
Product Expansion: Developing co-packaged GaN digital controllers to simplify customer designs and increase performance.
Global Scale-up: Expanding engineering and sales presence across Europe, North America, and Asia (Taiwan, South Korea, Hong Kong).

Sources