Full-Time

Lead Software Engineer

SEP

SEP

201-500 employees

Tailored software, AI, and cloud solutions

No salary listed

No H1B Sponsorship

Westfield, IN, USA

In Person

Must work from the Westfield office; relocation financial assistance is not provided.

Category
Software Engineering (1)
Required Skills
Python
JavaScript
React.js
Java
.NET
iOS/Swift
Android Development

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Requirements
  • Experience leading teams of four or more engineers.
  • Professional experience with mainstream development technologies such as JavaScript, .NET, Python, iOS, Android, Java, or React.
  • Must be legally authorized to work in the United States.
  • Must not require visa sponsorship or have work authorization based on OPT or CPT.
  • Must be able to work from the Westfield, Indiana office without relocation financial assistance.
Responsibilities
  • Lead small- to medium-sized cross-functional teams to build products.
  • Work on projects across life science, medical, aerospace, finance, and heavy machinery domains.
  • Build and deliver software while maintaining a clear understanding and vision of client needs.
  • Guide team members toward effective solutions during all stages of the project.
  • Maintain project momentum through timely communication and problem solving with stakeholders.
  • Deepen team members' engineering expertise and technical capacity through constructive feedback.
  • Help the team, client, and company continuously improve.
Desired Qualifications
  • Five or more years of experience leading teams of four or more engineers.
  • Ten or more years of professional experience with mainstream development technologies such as JavaScript, .NET, Python, iOS, Android, Java, or React.

SEP provides custom software development for a range of industries (healthcare, aerospace, finance) and works with both startups and large enterprises. The company handles the full lifecycle of software projects—from planning and design to development, testing, and deployment—delivering scalable, user-friendly web, mobile, and desktop applications. SEP differentiates itself through its end-to-end, client-tailored approach that tackles complex technical challenges and leverages AI and cloud computing to create data-driven solutions. Its goal is to help clients improve operations and outcomes with reliable, scalable software, while also offering ongoing maintenance for recurring revenue. Beyond business, SEP emphasizes corporate culture and community service through The SEP Foundation.

Company Size

201-500

Company Stage

N/A

Total Funding

N/A

Headquarters

Carmel, Indiana

Founded

1988

Get referred to SEP

See people who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • August 2026 blog updates show hiring, promotions, and finance leadership investment.
  • May 7, 2026 Top Workplaces ranking signals unusually strong employee satisfaction and recruiting pull.
  • CMMC Level 2 opens faster access to Department of Defense programs handling CUI.

What critics are saying

  • Custom project revenue exposes SEP to client pauses, scope cuts, and delayed renewals.
  • CMMC scope covers only the defense development environment, limiting protection against broader compliance wins.
  • Big integrators like Booz Allen and SAIC already dominate cleared defense software budgets.

What makes SEP unique

  • July 27, 2026 CMMC Level 2 certification strengthens SEP’s defense delivery moat.
  • SEP is 100% employee-owned, supporting retention and succession, per July 17, 2026 LinkedIn.
  • SEP has built custom software since 1988 across aerospace, healthcare, finance, and IoT.

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Benefits

Flexible Work Hours

Unlimited Paid Time Off

Paid Parental Leave

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Retirement Plan

401(k) Company Match

Professional Development Budget

Gym Membership

Company News

SEP
Jul 27th, 2026
SEP achieves CMMC Level 2 certification.

SEP achieves CMMC Level 2 certification. SEP news. Westfield, IN - July 27, 2026 - SEP, one of Indiana's largest software development firms, has achieved Cybersecurity Maturity Model Certification (CMMC) Level 2 certification for its development environment, reflecting full implementation of all 110 NIST SP 800-171 Rev 2 security controls with a perfect SPRS score of 110/110. CMMC Level 2 is a Department of Defense certification confirming a contractor fully implements the 110 security controls required to handle Controlled Unclassified Information (CUI) on defense programs. SEP has served aerospace and defense clients since 1989, building software across web, mobile, desktop, embedded, and cloud systems. A small fraction of companies in the Defense Industrial Base (DIB) currently hold CMMC certification, and SEP pursued certification early, building with CyberSheath and assessed by A-LIGN, to give existing and prospective defense clients confidence in how their most sensitive data is handled. "Too many contractors treat CMMC as a box to check. We approached certification to ensure continuity for the defense clients we already serve, and to build a foundation for the work ahead," said Marty Draper, Vice President of IT, Security, and Compliance at SEP. "It was important to us that we could keep supporting our existing defense clients while building toward what's next, without reworking how we operate." SEP partnered with CyberSheath, one of the most experienced CMMC compliance firms in the Defense Industrial Base, to architect the security controls, access policies, and system configurations behind the certification. The environment was independently assessed by A-LIGN, a Certified Third-Party Assessor Organization (C3PAO). SEP's certification is scoped to its defense development environment, which CyberSheath architected alongside SEP's internal IT & Security team to keep pace with SEP's broader business. That structure lets SEP bring on new defense clients within the existing compliance boundary, without expanding scope or reworking the architecture project by project. "Congratulations to SEP for achieving CMMC Level 2 certification. This accomplishment demonstrates a strong commitment to safeguarding valuable information to protect our nation, developing a competitive advantage, and creating a culture of security," said Petar Besalev, EVP of Compliance and Cybersecurity Services at A-LIGN. "We're proud to support this integral step in SEP's compliance journey with a high-quality assessment process and deep expertise in federal compliance." "SEP's accomplishment demonstrates a strong commitment to safeguarding valuable information to protect our nation, developing a competitive advantage, and creating a culture of security." Petar Besalev EVP of Compliance and Cybersecurity Services at A-LIGN Contractors and subcontractors that handle CUI are legally obligated to safeguard it under DFARS clause 252.204-7012, independent of where CMMC's broader certification framework lands. According to the Cyber AB, as of March 2026 only 1,074 organizations nationwide had achieved CMMC Level 2 certification, against a Defense Industrial Base the Department of War has estimated at roughly 80,000 contractors. "This certification is a foundation, not a finish line. We built it to support the defense clients we serve today and to give us room to grow with the ones we haven't met yet," said Draper. "As the requirements around this work continue to evolve, we intend to continue to be a leader in the strategic adoption of them." SEP designs and builds custom software for organizations ranging from Fortune 100 companies to scale-ups. One of Indiana's largest software development firms, SEP's services span the full product lifecycle: strategy, development, design, data, and AI. SEP works across industries including aerospace and defense, heavy machinery, pharma, precision ag, fintech, life sciences and medical devices, consumer IoT, and industrial IoT. Building for the DIB? See the security controls, scope, and partners behind SEP's CMMC Level 2 certified development environment. AI post recap. SEP, an Indiana software development firm serving aerospace and defense clients since 1989, has achieved Cybersecurity Maturity Model Certification (CMMC) Level 2 with a perfect SPRS score of 110 out of 110. The certification confirms SEP fully implements all 110 NIST SP 800-171 Rev 2 security controls required to handle Controlled Unclassified Information for Department of Defense programs. CyberSheath architected the security controls, and A-LIGN, a Certified Third-Party Assessor Organization, conducted the independent assessment. What is CMMC Level 2 certification? CMMC Level 2 is a Department of Defense cybersecurity certification confirming a contractor fully implements all 110 NIST SP 800-171 security controls needed to handle Controlled Unclassified Information (CUI) on defense programs. Does SEP have experience working in aerospace and defense? Yes. SEP has served aerospace and defense clients since 1989, building web, mobile, desktop, embedded, and cloud software for the industry. Links to the A&D industry page. Who helped SEP get CMMC Level 2 certified? CyberSheath architected SEP's security controls and access policies, and A-LIGN, a Certified Third-Party Assessor Organization (C3PAO), conducted the independent assessment. July 27, 2026 Published: July 27, 2026 At SEP, Software Engineering Professionals, Inc. make vital software. The kind that keeps airplanes in the sky, helps farmers feed a growing population, and makes medical devices safe. Whatever industry you're in, bring Software Engineering Professionals, Inc. your toughest challenge. Software Engineering Professionals, Inc. is wired to tackle what really matters - to you, to Software Engineering Professionals, Inc., and to its world. 317.843.1640 16080 Westfield Blvd. Carmel, IN 46033

SEP
May 12th, 2026
SEP ranks #2 on Indianapolis' 2026 Top Workplaces list.

SEP ranks #2 on Indianapolis' 2026 Top Workplaces list. SEP news. Westfield, IN - May 7, 2026 - SEP, a software product design and development firm based in Westfield, Indiana, has once again earned a spot among Central Indiana's Top Workplaces, placing second in the Midsize Companies category. The recognition is based entirely on employee feedback collected through an anonymous survey administered by Energage LLC. Survey questions focus on whether employees feel respected, supported, given growth opportunities, and empowered to take action. "What I love about this recognition is that it comes from the people doing the work," said Dawn Bunting, Director of HR at SEP. "Our team is curious, collaborative, and genuinely invested in each other's success, and that shows up in the survey year after year." Out of 111 organizations, 38 were recognized as Midsize Businesses Top Workplaces, making any placement a meaningful distinction. The Top Workplaces program, now in its 21st year for Central Indiana, is administered by Energage and relies entirely on confidential employee input to determine rankings. These employers were recognized by the annual Top Workplaces employee survey conducted by Energage, working in partnership with IndyStar. Top large companies. * Progressive Insurance * Eight Eleven Family of Companies * Shepherd Insurance * LEL Home Services * Merchants Bank / Merchants Capital * Tendercare Home Health Services * Rohrman Automotive Group * Team Rehabilitation * Wabash Center, Inc. * Brighton Hospice * Mainscape * The Indianapolis Public Library * Greenix * Raising Cane's Chicken Fingers * Indiana Members Credit Union * Celigo * Round Room LLC * Freedom Mortgage * Thompson Thrift * Kirby Risk * Ren * Morgan Properties * American Specialty Health, Incorporated * Towne Properties * New Palestine Community Schools * Planes Companies * Panda Restaurant Group * Fifth Third Bank * Flaherty & Collins Properties * Indiana Department of Revenue * Republic Airways * RCI * Cox Enterprises * PERFICIENT * Grand Appliance * PT Solutions * Centerstone * Peterman Brothers * Groundworks * Damar Services * Kloeckner Metals * CBIZ * Graybar * Resultant Top Midsize Companies. * Paradigm Health * SEP * New Hope of Indiana * Scopelitis Law Firm (Scopelitis, Garvin, Light, Hanson & Feary) * Bath Experts, LLC * Opportunities for Positive Growth * Hensley Legal Group, PC * TBC Hotels * The BAM Companies * BSA * Northview Church * Northwestern Mutual * Goodman Campbell Brain and Spine * Dauby O'Connor & Zaleski, LLC * Quality Plumbing & Heating * Meyer Najem * The Garrett Companies * Commonwealth Engineers, Inc. * Family Express * GVC Mortgage * Hays + Sons * InPwr Inc. * Kinetic Advantage * Schahet Hotels, Inc. * LER TechForce * Envelop Group * Unified Group Services, Inc. * Knowledge Services * Key Benefit Administrators * Reynolds Farm Equipment, LLC * ARBOR HOMES * Total Quality Logistics - TQL * North Mechanical Contracting & Service * Indiana Donor Network * Royal United Mortgage * Perfection Group * Eye Surgeons of Indiana * ALOM Top small companies. * Bailey & Wood Financial Group * Indesign, LLC * Children's Therapy Connection * Vaco Indianapolis * The Peterson Company * Express Employment Professionals * ProKids * Pension Fund of the Christian Church * Mission Mechanical * Robert Dietrick Co., Inc. * Loren Wood Builders * PulteGroup-IN * BGBC, a Springline company * NCW * Visit Indy * WorldTrips * Aerocore Technologies LLC * Vikan North America * ready-2-xecute * DirectEmployers * USI Consultants * SJCA, Inc. * Indy Auto Man * Kirkpatrick Management Company * Indiana Biosciences Research Institute * Engaging Solutions, LLC * Exos * Indiana Health Information Exchange * Patterson-Horth * Office360 * Netfor * Haggard & Stocking Assoicates * National Trade Supply * Fairchild Communication Systems * Adelta Logis, Inc. * EMC Precision Special awards. APPRECIATION Criteria: I feel genuinely appreciated at this company. Winner: Scopelitis Law Firm (Scopelitis, Garvin, Light, Hanson & Feary) BENEFITS PACKAGE Criteria: I am very satisfied with my benefits package. Winner: PulteGroup-IN CLUED IN SENIOR MANAGEMENT Criteria: Senior managers understand what is really happening at this company. Winner: Indesign, LLC COMMUNICATION Criteria: I feel well-informed about important decisions at this company. Winner: New Hope of Indiana DIRECTION Criteria: I believe this company is going in the right direction. Winner: Paradigm Health DOERS Criteria: At this company, Software Engineering Professionals, Inc. do things efficiently and well. Winner: Children's Therapy Connection LEADERSHIP Criteria: I have confidence in the leadership team of this company. Winner: Quinn Shepherd, Shepherd Insurance LEADERSHIP Criteria: I have confidence in the leadership team of this company. Winner: Mike Wood, Bailey & Wood Financial Group LEADERSHIP Criteria: I have confidence in the leadership team of this company. Winner: Andrea Schwartz, Opportunities for Positive Growth MANAGERS Criteria: My manager helps me learn and grow. My manager cares about my concerns. Winner: REN MEANINGFULNESS Criteria: My job makes me feel like I am part of something meaningful. Winner: LEL Home Services NEW IDEAS Criteria: New ideas are encouraged at this company. Winner: Progressive Insurance VALUES Criteria: This company operates by strong values. Winner: BSA WELL-BEING Criteria: This company does a great job of prioritizing employee well-being. Winner: The Peterson Company WORK/LIFE FLEXIBILITY Criteria: I have the flexibility I need to balance my work and personal life. Winner: Merchants Bank / Merchants Capital SOCIAL RESPONSIBILITY Criteria: My employer is socially responsible in the community. Winner: Loren Wood Builders SEP continues to invest in its culture alongside its craft - building vital software for high-stakes industries while staying committed to being a place where curious, skilled people can do the best work of their careers. About SEP SEP is a 100% employee-owned software product design and development company founded in 1988 by Rose-Hulman graduates. Based in Westfield, Indiana, SEP's 180+ person team builds software that matters in high-stakes industries - including aerospace, medical devices, and precision agriculture. From Fortune 100 companies to growing startups, clients trust SEP to tackle complex problems where good enough isn't good enough. Learn more at sep.com. AI post recap. SEP has earned second place in Central Indiana's Top Workplaces 2026 survey for Midsize Businesses - a recognition that comes entirely from anonymous employee feedback, not applications or nominations. It's the latest milestone in a streak of workplace recognition that stretches back to 2010, and a reflection of what it means to build a company where people actually want to show up. What is the Top Workplaces award? Top Workplaces is an annual recognition program administered by Energage LLC. Companies don't self-select their ranking - employees complete a confidential survey covering whether they feel respected, supported, and empowered. Rankings are based entirely on those results. What makes SEP's culture stand out? SEP is 100% employee-owned, which means everyone has real stake in the company's success. That shared ownership shapes how SEPeers collaborate, tackle hard problems, and support each other - and it shows up year after year in the survey results. May 12, 2026 Published: May 12, 2026 At SEP, Software Engineering Professionals, Inc. make vital software. The kind that keeps airplanes in the sky, helps farmers feed a growing population, and makes medical devices safe. Whatever industry you're in, bring Software Engineering Professionals, Inc. your toughest challenge. Software Engineering Professionals, Inc. is wired to tackle what really matters - to you, to Software Engineering Professionals, Inc., and to its world. 317.843.1640 16080 Westfield Blvd. Carmel, IN 46033

Inside Indiana Business
Feb 28th, 2025
Republic Airways, Accutech Systems among 2025 Mira Award winners

South Bend-based rScan was named Startup of the Year.

SEP
May 18th, 2023
SEP Ranks #1 for Top Workplaces in Central Indiana

Software Engineering Professionals, Inc. has been awarded first place in the Midsize Companies category, showcasing its commitment to creating an exceptional work environment for its employees in Westfield, Indiana.

SEP
May 10th, 2023
SEP Named a Best Places to Work Company for 13th Consecutive Year

SEP has once again been recognized as one of Indiana’s Best Places to Work for the 13th year consecutive year.