100% Remote:: MS DOS 4.0 Developer

Who We Are:

TekIntegral Inc. isn't just another staffing company, we're a hub of innovation, connecting top talent with the client needs.

Recognized for 140% growth in the past three years.

Our Moto - Right Talent. Right Time. Right Place. Right Price.

Please find below the job description.

Position: MS DOS 4.0 Developer
Location: Remote
Type: Contract

Visa: "The client is not willing to sponsor visas at this time." "

Description:

Skills Required: Must have

• A contract requirement for a MS-DOS 4.0 (not PC DOS 4.0) developer

Technical Expertise

• Strong knowledge of MS-DOS 4.0 internals (not PC-DOS): kernel structure, multitasking features, memory management changes introduced in MS-DOS 4.0.
• Proficiency in x86 Assembly (8086/80286).
• Strong C programming skills targeting real-mode DOS environments.
• Experience with DOS interrupts (especially INT 21h, INT 10h, INT 13h, INT 16h, etc.).
• Knowledge of FAT16 file system internals.
• Hands-on experience with TSR programming and interrupt hooking.

Tools & Environment

• Experience using MASM/TASM, Borland/Turbo C, Microsoft C compilers.
• Familiarity with legacy debugging tools (DEBUG, SYMDEB, CodeView).
• Ability to work with old build environments, floppy-disk boot images, and vintage hardware/emulators (e.g., DOSBox, PCem, 86Box).

Soft Skills

• Strong problem-solving skills for reverse-engineering or restoring undocumented legacy code.
• Ability to work independently with minimal documentation.
• Excellent communication skills for documenting complex legacy processes.

Email

Why Work with us ?

TekIntegral is an equal opportunity employer, dedicated to fostering a workplace where diverse talents and perspectives are valued.

We make all employment decisions based on merit, ensuring a culture of respect, fairness, and opportunity for all, regardless of age, gender, ethnicity, disability, or other protected characteristics.