Senior Full Stack Developer
Confidential Careers
Job Description
Senior Full Stack Developer - C#/.NET -Long Island, NY
Our client, a well-established financial services organization on Long Island , is investing heavily in a major technology modernization initiative and is looking for a Senior Full Stack Developer to join the team.
What You’ll Do:
- Develop and modernize enterprise applications using C#/.NET
- Help transition legacy VB.NET applications to modern .NET architecture
- Work extensively with SQL Server and complex relational databases
- Leverage AI coding tools such as Claude and Microsoft Copilot to accelerate development and improve code quality
What We’re Looking For:
- Senior-level C#/.NET Full Stack development experience
- Expert-level SQL Server skills
- Experience modernizing legacy applications
- Current hands-on experience with AI-assisted coding/development tools
- Strong problem-solving skills and the ability to work across the full technology stack
This is an opportunity to join a stable, highly respected financial services firm while working on meaningful modernization initiatives and the next generation of software development.
Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Senior Full Stack Developer in Smithtown, NY vacancy
- ...Microchip Technology Inc. is seeking a Senior Engineer I - Product to drive all facets of product support and new product development. You will lead with global engineering teams to ensure successful design, validation, and production launches for Security and Computing...Senior
Microchip Technology
Hauppauge, NY2 days ago - ...Morgan Stanley is seeking a senior leader to own pricing strategy and deposit economics for corporate deposits. You will set pricing policy, advise on balance sheet trade-offs, and build a scalable pricing capability across markets. This executive role partners with Treasury...Senior
Morgan Stanley
Central Islip, NY2 days ago - The Sisters of St. Joseph seek an experienced Registered Nurse to serve as Nursing Supervisor/Manager within our Health and Wellness program. This role provides leadership, staff supervision, and coordination of compassionate nursing care for Sisters in the Convent or ...Senior
Sisters of St Joseph
Brentwood, NY1 day ago - ...The Senior Manufacturing Engineer at Bren-Tronics, part of EnerSys and manufacture of advanced power solutions, is a key technical leader responsible for developing, optimizing, and sustaining manufacturing processes for battery production in a defen Manufacturing Engineer...Senior
EnerSys
Commack, NY18 hours ago - HireHawk Inc. in Hauppauge, NY, seeks an experienced Elder Law Attorney to join our Estates Department. You will advise clients on estate planning, Medicaid planning, crisis planning, and long-term care strategies, meeting with elderly clients, families, and caregivers...Senior
HireHawk Inc.
Hauppauge, NY10 hours ago $150k - $200k
Unknown Firm in Hauppauge, NY is seeking an experienced Elder Law Attorney to join its growing practice. The role focuses on Elder Law, Medicaid planning, asset protection, long-term care planning, crisis Medicaid matters, and estate planning. The position is onsite...SeniorWork at officeMission Recruiting, LLC
Hauppauge, NY10 hours ago- ...company in Brentwood, New York is seeking a qualified Warehouse Manager to oversee warehouse operations, enhance customer service, and develop transportation programs. The ideal candidate will have significant experience in logistics and a strong understanding of...Senior
U.S. Alliance Paper
Central Islip, NY4 days ago - Lane Valente Industries is a Leading International construction and facility maintenance company with offices across the U.S. and Canada. We are seeking an Automatic Door Service Technician to service a variety of automatic and manual doors, with AAADM certification...Senior
Lane Valente Industries
Smithtown, NY1 day ago $62.32 per hour
Catholic Health in Smithtown, NY, is seeking a Physical Therapist to oversee direction, supervision, and evaluation of staff in the physical therapy department. The ideal candidate is a graduate of an approved Physical Therapy program, eligible for state licensure, and...SeniorHourly payCatholic Health Service
Smithtown, NY3 days ago- Nestlé Health Science seeks a Sr. Financial Control Manager to lead financial stewardship, performance management, and strategic decision-making across MOGE and IS/IT spend for Holistic Health. You will translate complex data into actionable insights, oversee planning,...Senior
Nestle
Central Islip, NY2 days ago - St. James Rehabilitation and Healthcare Center in New York is seeking a skilled Respiratory Therapist (RT) for our long-term rehab facility. You will assess, treat, and manage cardio-pulmonary conditions, working with an interdisciplinary team to deliver quality care. ...Senior
St. James Rehabilitation and Healthcare Center
Village of The Branch, NY3 days ago - ...protection, long-term care planning, crisis Medicaid matters, and estate planning. The attorney will advise on Medicaid eligibility, develop protection strategies, oversee applications and appeals, and counsel families through complex healthcare and financial decisions....SeniorWork at office
Mission Recruiting, LLC
Hauppauge, NY5 days ago - Ultimus is seeking a Manager of Legal Administration in Hauppauge, NY to lead a team of paralegals and provide governance support for mutual fund clients. Responsibilities include preparing SEC filings, board materials, and coordinating with fund counsel while mentoring...Senior
Ultimus
Hauppauge, NY3 days ago - Spellman High Voltage Electronics Corp. is seeking a highly motivated Sr. Engineer in Power Electronics, to advance the technology roadmap for high voltage power solutions. The role involves independent development of new concepts, supporting customer projects, and delivering...Senior
Spellman High Voltage Electronics Corp.
Hauppauge, NY4 days ago - ...Creative Financial Staffing, LLC is seeking a Senior Accounting & Finance Analyst in Hauppauge, NY. This role involves leading month-end close, budgeting, forecasting, and financial analysis to drive business performance. The position requires 5–7 years of GL and financial...Senior
Creative Financial Staffing
Hauppauge, NY4 days ago - Hyde Park Mouldings, Inc. is seeking an experienced CAD Draftsperson to join our drafting department at 110 Kennedy Drive, Hauppauge, NY. The role focuses on producing detailed shop drawings for custom architectural products, using AutoCAD 2D and related tools, under...Senior
Hyde Park Mouldings
Hauppauge, NY3 days ago - ...Contract Pharmacal Corp in Hauppauge, NY is seeking a Senior Formulation Scientist to lead hands-on development of pharmaceutical and nutraceutical products from concept to commercialization. The role focuses on oral solid dosage forms and may emphasize drug or nutraceutical...SeniorContract work
Contract Pharmacal
Hauppauge, NY2 days ago - Actalent is seeking a Superintendent for a 3-month retail fit-out project based in Smithtown, NY. This onsite role requires overseeing day-to-day field operations, coordinating multiple trades, and driving progress through inspections and turnover. You will manage safety...SeniorFor subcontractor
Actalent
Smithtown, NY18 hours ago - ...quality leader to oversee site-wide quality systems for a leading aerospace and defense electronics manufacturer. You will build and develop a team of quality professionals and drive continuous improvement across the operation. You will lead AS9100 compliance, manage...Senior
DSJ Global
Hauppauge, NY2 days ago - ...Microchip Technology Inc is seeking a Senior Engineer I - Product to lead and collaborate with global engineering teams on Security and Computing products. This high-visibility role drives New Product Development from design to mass production and supports customers with...Senior
Microchip Technology
Smithtown, NY4 days ago - ...Broadridge is hiring a Senior Business Analyst to manage fund and ETF proxy campaigns and help clients secure shareholder votes. You... ...provides data-driven recommendations. Responsibilities include developing solicitation strategies, monitoring progress, and using #J-1880...Senior
Broadridge
Brentwood, NY2 days ago - ...PKF O'Connor Davies TalentConnect presents a full-time Controller opportunity in Hauppauge, NY for a privately held fuel distribution and retail company. The role leads the accounting function, ensuring timely, accurate financial reporting and strong internal controls...SeniorFull time
PKF O'Connor Davies TalentConnect
Hauppauge, NY10 hours ago $26.33 - $32.91 per hour
...Stony Brook Ophthalmology, UFPC in Lake Grove, NY is seeking a Senior Ophthalmic Technician to support the Ophthalmology department with highly complex testing and patient care. The role involves performing history taking, recording ocular history, obtaining and recording...SeniorHourly payMonday to FridaySB CLINICAL PRACTICE MANAGEMENT PLAN INC
Lake Grove, NY1 day ago- ...fast-paced market. The role requires 5+ years in structured finance, strong analytical skills, and the ability to collaborate with sales, underwriting and trading desks while developing marketing materials and analytics to support new product offerings. #J-18808-Ljbffr...Senior
Morgan Stanley
Central Islip, NY2 days ago - ...Bausch Health is seeking a Senior Medical Science Liaison for GI in the North East. The role focuses on high-level scientific engagement with KMEs, trial site collaboration, and cross-functional medical strategy across a broad NY territory. The role requires a minimum...Senior
Bausch Health
Hauppauge, NY2 days ago - ...and assist in preparing client presentations. This role offers exposure to large deals, client interaction, travel, and a path to senior roles in financial services. Prior investment banking experience and strong Excel/PowerPoint skills are essential. #J-18808-...Senior
3413US00 HowdenTiger Capital Markets&Advisory
Village of The Branch, NY3 days ago - ...A defense engineering company located in Hauppauge, NY is seeking a full-time CNC Programmer to develop advanced CNC programs for 3-, 4-, and 5-axis machines. The ideal candidate will have at least 5 years of CNC programming experience and be skilled in tooling and fixtures...SeniorFull time
GSE DYNAMICS INC
Central Islip, NY4 days ago - ...Stony Brook Ophthalmology UFPC is seeking a Senior Ophthalmic Technician to support physicians with highly specialized eye-care procedures in a fast-paced ophthalmology department. The role involves performing complex testing, preparing patients and equipment, and documenting...Senior
Stonybrookphysicians
Lake Grove, NY1 day ago $100k - $160k
DescriptionKforce's client, a well-established, middle-tier full-service CPA firm located in beautiful Long Island, NY is seeking a Tax Senior and Tax Manager to join their growing tax department.Summary:The Tax Senior and Tax Manager will service diverse clientele, handling...SeniorWork from homeKForce
Hauppauge, NY10 hours ago$208k
Suffolk AME in Hauppauge invites applications for a Deputy Medical Examiner position. As a Forensic Pathologist, you will perform postmortem examinations to determine cause and manner of death. Responsibilities include visiting death scenes, generating reports, and collaborating...SeniorMonday to FridaySuffolk AME
Hauppauge, NY10 hours ago
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Full Stack Developer. Be the first to apply!
Related searches
- senior performance engineer Smithtown, NY
- senior Smithtown, NY
- senior manager diversity & inclusion Smithtown, NY
- senior part time Smithtown, NY
- senior application security Smithtown, NY
- senior application administrator Smithtown, NY
- senior resident engineer Smithtown, NY
- senior implementation engineer Smithtown, NY
- senior operations technician Smithtown, NY
- srs Smithtown, NY