Senior Custom Solutions Software Engineer at Honeywell · Gdansk

LenelS2 is a global leader in advanced security systems, providing flexible, integrated solutions that help protect some of the most security-conscious organizations around the world. With a commitment to open architecture and easy integration, we remain at the forefront of an industry increasingly turning to cloud-based solutions and mobile monitoring.

What are the challenges and how will you make an impact?

LenelS2’s Custom Solutions Team develops custom software that extends the OnGuard security platform. These applications are critical to the security operations of Fortune 100 firms, financial institutions, universities, and government facilities. As a member of the LenelS2 Custom Solutions team, you would be involved in the entire software development lifecycle.

In this position, you will assist in the design, development, testing, deployment, and support of customer driven software solutions that meet the unique requirements of our customers. This position will be responsible for completing projects as assigned to include custom Crystal Reports, data import and export, custom application integrations and custom database programming (SQL triggers and stored procedures). Responsibilities will also include providing support for existing customers of Lenel’s Custom Solutions, performing remote and, on-site as needed, installation of Custom Solutions-developed software.

What growth opportunities will you have with us?

You will be part of the growing Custom Solutions organization within LenelS2. You will be exposed to all aspects of the software development lifecycle utilizing various technologies. This experience will enable you to not only expand your skillset to a senior software engineer but will also give you opportunity to move into other engineering teams within LenelS2.

Overview:

As a Custom Solutions Software Engineer, you will assist in the design, development and installation of software applications that extend and enhance the OnGuard product. Your projects would include custom integrations to third party software systems, extensions to OnGuard to allow our customers to meet regulatory compliance guidelines, and custom applications that help ensure the safety and security of our customer’s employees and facilities.

Responsibilities

• 5+ years of experience as a Software developer with experience in C#
• Develop software solutions on schedule that meet customer requirements
• Test software prior to installation to ensure we deliver high quality solutions every time
• Install software on customer systems. Installation is typically installed over a remote connection, though on-site installation is possible for high security sites without an internet connection to their security network
• Test and provide sustaining engineering for existing commercially available software solutions developed by the Custom Solutions team
• Prepare documents with requirements and propose solutions based on customers’ requests,

Qualifications

• Bachelor’s degree in Computer Science, related field, or suitable experience

Technical Qualifications:

• Experience developing software applications using C#
• Experience with SQL and relational databases
• Experience testing and supporting software installations,
• Proven ability to adapt quickly to emerging technologies,
• Experience with REST API definitions and implementations

Preferred Qualifications:

• Experience with SQL Server database development using T-SQL and writing SQL stored procedures, triggers, and functions
• Experience with Crystal Reports
• Knowledge of ASP.NET, ADO.NET and WinForms
• Knowledge of REST API principles
• Knowledge of Javascript/Typescript and web applications,
• Experience with access controls devices (?),
• Experience with binary protocols used to M2M communication
• Experience developing test plans and procedures

Competencies:

• Customer service orientation, ability to develop strong, long-term customer relationships.
• Excellent interpersonal skills
• Professionalism consistent with a world-class service provider
• Ability to work independently in a team environment

Our offer:

• State-of-the-art office with chill-out areas, bicycle stands, showers and probably the best coffee in town
• Fruits bowls and sports activities to support your health and well-being
• Daily paid break - 30 mins and flexible working hours
• Hybrid work arrangement (3&2) to support your work-life balance
• Competitive Salary regularly increased based on your performance
• Flexible benefits basket with monthly budget allocated (medical insurance, life insurance, Multisport Card)
• Generali Insurance (Accident Insurance)
• Referrals bonuses for all open jobs and recognition programs
• Comprehensive induction, ongoing training and development to set you up for success
• In-house and external learning platforms supporting development opportunities
• Work experience opportunities to help you grow your career with us
• Global employee networks to help you connect and grow
• Employee Assistance Program - Free and confidential service to help with any difficulties regarding work, life and personal or family matters
• Access Integrity line - Any workplace issues or violations that need to be raised in good faith, can be communicated in a safe, private and confidential environment
• Frequent Employee Engagement activities supporting inclusive and diverse work environment
• Contribution to social benefits like x-mas benefit, holiday, engagement events from company social fund.

We are an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform crucial job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

Join us now and be part of a global team of thinkers, innovators, dreamers, and doers who make the things that make the future!

#FutureShaper

#GdanskEngineering2026

#PWIT

About the Company

Honeywell helps organizations solve the world's most complex challenges in automation, the future of aviation and energy transition. As a trusted partner, we provide actionable solutions and innovation through our Aerospace Technologies, Building Automation, Energy and Sustainability Solutions, and Industrial Automation business segments – powered by our Honeywell Forge software – that help make the world smarter, safer and more sustainable.