Our teams build products that keep planes flying help first responders save lives and allow farmers to feed the world. Our clients range from Fortune 100 enterprises to fast-moving startups. Founded in 1988 SEP is one of Indianas largest software product development and design companies.
Why SEP for Your Design Career
At SEP you wont just design screensyoull define how systems behave. As a Senior Interaction Designer youll embed with client teams to tackle complex meaningful problems. From internal tooling to consumer-facing apps youll shape behavior logic and flows that connect real-world needs with digital systems.
Were not an agencywere a consultancy. We co-create with our clients guiding not just what we build but how we build it. Designers at SEP influence product direction align cross-functional teams and raise the bar for design maturity across industries.
Design maturity here grows through practice. Youll solve real problems reflect with peers and share what works. Senior designers lead by examplecoaching others through collaboration critique and modeling clear decision-making.
We value assertiveness and empathy in equal measure. Youll need to read the room push when it matters and navigate ambiguity with care. Its about asking better questions asserting ideas thoughtfully and knowing when to agree to disagree.
You Might Be Our Next Senior Interaction Designer If You:
Thrive on the complexity of software systemsand have the experience to back it up
Align user needs technical constraints and business goals to create real impact
Bring energy and clarity to design conversations and client engagements
Collaborate closely with engineers PMs and stakeholdersand help the whole team work smarter
Are available to work on-site full-time at our Carmel IN headquarters
Responsibilities and Duties
Define how products behave through flows rules logic and interaction patterns
Translate ambiguity into viable product direction using design research and framing
Shape design flow: structure artifacts decisions and sequencing to guide teams through discovery and delivery
Shape alignment flow: build visual models and shared understanding across stakeholders
Work end-to-end across the product lifecyclefrom discovery through delivery
Plan and synthesize generative and evaluative research to validate behavioral assumptions early
Create maps flows IA rules charts and prototypes that guide confident implementation
Collaborate with developers to ensure designs are feasible testable and coherent
Reduce rework and misalignment by designing early clarity into every step
Help SEP clients and teammates improve through shared learning and continuous feedback
Contribute to our design practice through writing facilitation and mentoring
Occasionally travel within Indiana or nearby states for in-person client work
Required Qualifications
8 years of professional experience in product or interaction design with a track record of leading complex cross-system projects and guiding teams through ambiguity
Consultancy or agency experience
Degree in UX Visual Communication Design or related field; HCI coursework or certification preferred (Masters degree in HCI or related discipline strongly preferred)A strong portfolio demonstrating a variety of problem types and platforms
Clear articulation of your role and contributions within project teams
Strong communication framing and consulting skills
Experience collaborating with engineers and PMs in Agile or Lean environments
Effective visual design and interface work using Figma
Experience breaking down large problems into incremental testable design work
Experience coaching designers and influencing team decision-making
Must be legally authorized to work in the U.S.
Must not require visa sponsorship or OPT/CPT authorization
Must be able to work full-time in-person at SEP headquarters in Carmel IN
Bonus Points
Experience designing for AI systems automation or complex logic
Experience using AI in your own design workflow
Comfort assessing client design maturity and coaching teams toward growth
SEP is a software product design and development company located in Westfield IN. We provide powerful teams of thoughtful developers and designers to bring ideas to life. Founded in 1988 SEP is one of Indianas largest software development firms with 170 employees. Our clients span from Fortune 100 to scale-up companies. We are 100% employee-owned through an ESOP and are consistently recognized for our great culture (Top Workplaces Best Place to Work in Indiana Techpoint Mira Exceptional Employer).
We are an equal opportunity employer. All employment is decided based on qualifications performance merit and business need. We do not discriminate on the basis of race color religion marital status age national origin ancestry physical or mental disability medical condition pregnancy genetic information gender sexual orientation gender identity or expression veteran status or any other status protected under federal state or local law.
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