Education Requirements:

• MS or PhD in Cognitive Psychology, Psychology, User Experience, Human Factors, Mathematics, Statistics, Engineering, or other related field

Experience Requirements:

• 5+ years of professional experience

• Experience with HMT, HMI, HSI, Human Factors, Human Performance, and Usability

• Experience engaging with end users and stakeholders

• Programming skills in Python

Other Requirements:

• US CITIZENSHIP REQUIRED and ability to obtain a U.S. Security Clearance

Responsibilities:

• Perform Human-Machine Teaming Test and Evaluation (HMT T&E) of Artificial Intelligence

• Lead user engagement studies, knowledge elicitation sessions, human-in-the-loop assessments, and workflow analysis

• Identify appropriate human performance metrics to evaluate the system performance and effectiveness of Human-AI Teaming

• Perform quantitative and qualitative assessments of human performance with AI systems

• Develop UI mockups

Benefits:

• participation in the company’s annual cash bonus plan

• variable compensation (OTE) for sales and customer success roles

• equity

• sign-on payments

• comprehensive range of health, welfare, and wellbeing benefits

Experience Requirements:

• 8+ years of experience in B2B SaaS product marketing roles

• Marketing tech experience and or e-commerce is a huge plus

Other Requirements:

• Know what great work looks like – bringing in new product intro frameworks and playbooks for our team, while knowing when to create our own playbook to move fast

• Have examples of great positioning and messaging that cut through the noise and differentiated your product or service

• Love and thrive in a fast-paced, dynamic environment

Responsibilities:

• Researching the market landscape of product areas we’re exploring – including TAM/SAM, competitors, packaging & pricing, and much more

• Partnering with the Product team as the voice of our customers, GTM teams, and the market to help shape MVPs and product roadmaps

• Launching new, innovative products and features into market that cut through the noisy landscape

• Crafting differentiated positioning and messaging to test and establish for new products

• Building core sales and marketing assets such as pitch decks, one pagers, enablement trainings, and more to get new products off the ground

Benefits:

• participation in the company’s annual cash bonus plan

• variable compensation (OTE) for sales and customer success roles

• equity

• sign-on payments

• comprehensive range of health, welfare, and wellbeing benefits

Education Requirements:

• Bachelor’s degree in Finance, Business, Economics, Engineering, Math, or a related field

Experience Requirements:

• 5+ years of relevant experience in revenue forecasting, FP&A, sales strategy, or business analytics; SaaS or PLG/SLG hybrid experience preferred

• Experience working with Salesforce and forecasting tools (e.g., Clari, Anaplan, or equivalent)

Other Requirements:

• Strong analytical skills with experience building and validating forecasting models using real-world GTM data

• Advanced in Google Sheets or Excel (index/match, query, arrayformulas); comfort with SQL and business intelligence tools

• Familiarity with ARR-based forecasting, pipeline coverage, and SaaS productivity metrics

• Exposure to PLG-to-SLG conversion metrics or customer lifecycle analysis

• Strong communicator who can synthesize data into insights and explain complex topics to non-technical audiences

Responsibilities:

• Own the design, execution, and ongoing refinement of weekly and monthly revenue forecasts across multiple segments, regions, and product lines

• Develop and maintain forecasting models that incorporate pipeline performance, conversion trends, rep productivity, seasonality, and leading indicators

• Partner with Sales, Sales Operations, RevOps, Marketing, and Partnerships to ensure alignment on forecast methodologies and key assumptions of all of our demand channels

• Create and maintain executive-facing reporting to drive forecast visibility and support decision-making

• Analyze historical performance to surface trends, identify forecast risks and upside, and provide strategic recommendations

Benefits:

• participation in the company’s annual cash bonus plan

• variable compensation (OTE) for sales and customer success roles

• equity

• sign-on payments

• comprehensive range of health, welfare, and wellbeing benefits

Experience Requirements:

• 1+ years of closing experience in SaaS marketing or ecommerce related technology

• Proven experience selling to C-Suite/ Marketing personas

Other Requirements:

• Located in Boston or Denver, 3 days a week in-office

• strong knowledge of the Ecommerce/ Retailers/ Brands domain

• Excited to empower creators, motivated to exceed goals

• Receptive to feedback and failure as an opportunity to improve

• Continually seek improvement, expanding your knowledge of customer marketing, technology and business landscape

Responsibilities:

• Build Klaviyo’s e-commerce client base for Entrepreneur segments

• Actively manage your pipeline and develop a strategy for long-term sustained success

• Support the success of your peers

• Exhibit Klaviyo’s values of accountability and effort

• Provide guidance and support to new Account Executives

Benefits:

• participation in the company’s annual cash bonus plan

• variable compensation (OTE) for sales and customer success roles

• equity

• sign-on payments

• comprehensive range of health, welfare, and wellbeing benefits

Experience Requirements:

• 2+ years of closing experience, ideally within Saas/MarTech

Other Requirements:

• Must be located in Boston or Denver (3 days/week in office)

• Excited, motivated, and inspired by exceeding goals

• Aren’t afraid to hear no and embrace failure as an opportunity to improve

• Continually seek improvement and are rigorous in your pursuit of it

• Are encouraging of your team

Responsibilities:

• Build Klaviyo’s SMB client base

• Actively manage your pipeline and develop a strategy for long-term sustained success

• Support the success of your peers

• Exhibit Klaviyo’s values of accountability and effort

• Provide guidance and support to new Account Executives

Benefits:

• Do work that matters.

• Well-funded and global, backed by world-class investors

• Work with a bunch of awesome, genuine people

• Flexible and remote-friendly working

• Make a real impact.

Experience Requirements:

• 5+ years ess experience in commercial coordination or a similar role

Other Requirements:

• Demonstrated ability to manage multiple priorities and projects under pressure

• Strong written and verbal English communication and interpersonal skills

• Proficiency in project management tools and Microsoft Office Suite

• Problem-solving and negotiation skills

Responsibilities:

• Delivery of both internal gatherings (such as company-wide meetings, retreats, and team-building activities) and external functions (including investor sessions, client summits, industry conferences, and tradeshows)

• Take charge of event-related planning—securing venues, arranging catering, coordinating audio/visual needs, managing branded materials, and overseeing attendee experience to guarantee smooth execution within budgetary constraints

• Collect and analyze feedback after each event to find opportunities for improvement and increase future impact

• Provide comprehensive administrative assistance to the Americas-based team and senior executives, managing complex calendars, organizing meetings, booking travel and preparing necessary documentation

• Monitor and prioritize ongoing projects and assignments, ensuring deadlines are met and deliverables are completed efficiently

Benefits:

• Competitive Compensation

• Comprehensive benefits package

• Work-Life Balance

• Growth Opportunities

• Collaborative Culture

Education Requirements:

• Bachelor ’s degree in accounting, finance, or a related field

Experience Requirements:

• 1-3 years of experience in the field of accounting, ideally with a technology or professional services company

• This experience can include relevant internships

• Prior public accounting experience is a plus

Other Requirements:

• Solid computer skills, including advanced proficiency with Excel

• Strong understanding of US GAAP and hands-on experience with month-end close processes, journal entries, and reconciliations

• Must be detail-oriented, have strong analytical and problem-solving skills, be able to multitask, and have confident interpersonal skills

• Proactive problem-solver who ’s curious and thrives in fast-paced, hybrid environments

• Excellent written and verbal communication skills; ability to collaborate with teams and external partners

• CPA is a plus

Responsibilities:

• Month-end close process in NetSuite, including preparing journal entries, reconciliations, and monthly financial statements for our US and UK operations

• Oversee employee time reporting and analysis

• Responsible for Accounts Payable and Accounts Receivable processes: vendor invoicing/payments, customer billing, and expense reimbursements

• Prepare and file VAT (UK) and state sales tax (US) filings. Be a liaison to our external tax advisors

• Responsible for payroll processing via a third-party processor and benefits administration in the US and UK, including resolving state tax filing issues and annual 401 (k) compliance

Benefits:

• Healthcare, dental, and vision insurance for your entire family.

• Equity (stock options) valued between $50,000 - $150,000.

• Unlimited vacation and 15+ company holidays per year.

• Work directly with the founders.

Experience Requirements:

• Strong experience in managing and automating cloud infrastructure (AWS, GCP, or Azure).

• Proficiency with containerization technologies like Docker/Podman/Singularity, and virtualization (QEMU, KVM).

• Experience implementing and operating CI/CD tools such as Jenkins, GitLab CI, or CircleCI.

• Solid understanding of infrastructure-as-code tools like Terraform or CloudFormation.

• Experience in monitoring and logging tools such as Prometheus, Grafana, ELK stack.

Other Requirements:

• Must be a US citizen or permanent resident, and currently living, or willing to relocate to the Boston area.

Responsibilities:

• Design, implement, and manage scalable infrastructure for deploying AI models and data ingestion both on-premises in Boston, MA, and in the cloud.

• Automate the deployment, monitoring, and scaling of AI and data ingestion systems.

• Collaborate with software/ML engineers and data scientists to ensure seamless integration and deployment of AI models and data ingest platforms.

• Develop and maintain CI/CD pipelines for model and infrastructure updates.

Experience Requirements:

• 1+ years

Benefits:

• Competitive compensation and benefits

• Flexible working hours

• Flexible vacation policy

• Growth opportunities

• Focus on execution, not numbers of hours

Benefits:

• Competitive compensation and benefits

• Flexible working hours

• Flexible vacation policy

• Growth opportunities

• Focus on execution, not numbers of hours

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• PhD in EECS, Physics, or related discipline with 3 years of experience

Experience Requirements:

• Must have knowledge of photonic device physics

• Demonstrated track record of design integrated silicon photonics components using Lumerical, Tidy3D or equivalent

• Experience with code based GDS creation such as GDS Factory or similar

• Experience with large scale layout, testing and characterization of photonic devices

Responsibilities:

• Design high-performance photonics devices suitable for high-volume manufacturing

• Actively collaborate across disciplines—with analog, digital, and physical design teams—to layout photonic devices for key test and product tape outs

• Work with the photonics test team in defining requirements for device characterization, debug and validation

• Analyze characterization data to ensure the device/system meets the specifications

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• Master's degree in EE, CS, or CE or equivalent

Experience Requirements:

• 15+ years of experience in semiconductor technologies and participation in multiple tapeouts with 1st pass silicon success

• expertise in verification methodologies, including simulation, formal verification, and FPGA emulation

• Proficient in HDL (Verilog. VHDL) languages

• Proficient with scripting languages, preferably Python

• Experience working with the development of Real Number Models (RNM) for photonics & analog circuits

Responsibilities:

• Own the design verification details including the DV plan & execution for chip projects

• Drive state-of-the-are DV methodology & flow for optical interconnect products

• Work with architecture, hardware, software, systems, and program management teams to deliver state-of-the-art silicon products

• Organize and expertly drive planning, scheduling, and day-to-day execution to support the design design team

• Collaborate with leads and engineering teams in effectively estimating and prioritizing tasks to maintain high design quality on a realistic delivery schedule

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• MS with 3+ years of industry experience, OR Ph.D. with 5+ years of industry experience with a focus on optical or wireline transceiver design

Experience Requirements:

• Experience designing Analog-Front-End blocks such as trans-impedance amplifiers (TIA) and Tx Driver

• Experience with Tx/Rx equalization techniques and circuits

• Experience with testing and validating high-speed analog/mixed-signal circuits

• Familiarity with SERDES architectures, and implementations

Responsibilities:

• Support micro-architecture development with chip architects by conducting feasibility studies

• Collaborate with members of our design engineering teams (system, digital, analog, photonics) to define electrical requirements

• Design analog/mixed-signal blocks with a focus on transceivers (TIA, TX Driver) and broadband circuits interfacing with silicon photonics elements

• Document design simulations and verifications towards formal design reviews

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• Master’s in Electrical/Computer Engineering with a minimum of 7 years of industry experience

Experience Requirements:

• Expertise with modeling advanced systems in SystemVerilog

• Expertise in Scripting - Python

• Strong knowledge of optical link design architectures

• Familiarity with ASIC design flows and FinFET technologies

Responsibilities:

• In depth analysis of PHY and optical link performance

• Close collaboration with various teams to develop tuning and calibration algorithms for photonics and analog logic

• Hands on post-silicon performance analysis and debug

• Creation of post-silicon test cases and planning

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• A Ph.D. degree in Photonics, Electrical Engineering, Applied Physics, or similar discipline with at least 5 years of post-degree relevant experience, or equivalent experience

Experience Requirements:

• Minimum 12 years of experience in photonic devices, photonic integrated circuits, and semiconductor physics

• Strong understanding of laser physics and silicon photonics

• Experience working with cross-functional teams to collaboratively define and deliver to product specifications

Responsibilities:

• Work with a cross-functional team to design and deliver a successful high-volume laser product

• Deliver laser module architecture specifications and work closely with hardware and software teams to define functionality, interfaces, and documentation

• Engage in problem-solving to develop innovative high-performance laser solutions

• Actively collaborate across disciplines—with electronics, photonics, mechanical, and thermal engineering teams—to design systems, control algorithms, PICs, and PMICs that meet stability, performance, power, and production requirements

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• PhD in EECS, Physics, Photonics, or related discipline with 3 years experience

Experience Requirements:

• Experience in silicon photonics device design, layout, and testing, ideally in a product development environment

• Demonstrated track record of designing integrated silicon photonics components using Lumerical, Tidy3D, or equivalent

• Knowledge of photonic device physics and laser physics

• Proficiency in modeling and data analysis in Python

Responsibilities:

• Design and optimize silicon photonic devices for laser systems, including couplers, muxes, rings, switches, and other active and passive components.

• Layout device test structures as well as complex integrated photonic systems.

• Work with the laser test team to develop and execute test plans for device validation, analyzing results to assess performance and troubleshoot issues.

• Work closely with packaging and systems engineering teams to address integration challenges, ensuring high alignment between device and system requirements

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• 12 years of related experience with a Master’s degree; or 8 years with a PhD

Experience Requirements:

• Demonstrated track record of design integrated silicon photonics components using Lumerical, Tidy3D or equivalent

• Experience with code based GDS creation such as GDS Factory or similar

• Experience with large scale layout, testing and characterization of photonic devices

• Experience with PDK and Cadence environments a plus

Responsibilities:

• Design high-performance photonics devices suitable for high-volume manufacturing

• Analyze characterization data to drive improvements on photonics devices and ensure the device/system meets the specifications

• Design of Active and Passive devices including modulators, photodiodes and tunable filters

• Engage in problem solving and contributing with novel architectural ideas

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• MS with 8+ years of relevant experience, OR Ph.D. with 5+ years of experience

Experience Requirements:

• 3+ years of experience in the Semiconductor industry experience in Analog/Mixed-signal IC design

• Solid fundamentals of CMOS device characteristics, noise, mismatch, linearity, and design trade-offs

• Experience designing complex blocks such as data converters, control-loop circuits used in power-delivery, high-speed interface circuits

Responsibilities:

• Participate in the architecture development with our chip architects by leading feasibility studies

• Collaborate with other design engineering teams (system, packaging, digital, photonics) to translate system-level requirements into electrical design specifications

• Lead the analog design and top-level integration of integrated circuits development

• Design complex analog and mixed-signal circuits

Benefits:

• Comprehensive Health Care Plan (Medical, Dental & Vision)

• Retirement Savings Matching Program

• Life Insurance (Basic, Voluntary & AD&D)

• Generous Time Off (Vacation, Sick & Public Holidays)

• Paid Family Leave

Education Requirements:

• 6 years with a Masters or 3 PhD in Photonics, Physics, Electrical Engineering, or a related field

Experience Requirements:

• Must have strong experience in electro-optic testing of silicon photonics components

• Demonstrate solid problem-solving skills in problems that do not have obvious solutions

• Expert in developing and implementing automated testing and system interfaces using Python scripting

• Demonstrate extensive knowledge of silicon photonics devices

Responsibilities:

• Participate in electro-optic testing of photonics chips/devices, leveraging hands-on laboratory experience and working with various optical instruments.

• Conduct tests and characterization of silicon photonics components, including micro-rings, optical phase shifters, and Mach-Zehnder interferometers.

• Operate a range of optical equipment such as lasers, electro-optic modulators, semiconductor optical amplifiers, PIN receivers, optical spectrum analyzers, optical vector analyzers, and optical filters.

• Utilize semiconductor test equipment, including vector network analyzers, spectrum analyzers, source-meter units, arbitrary waveform generators, and high-speed oscilloscopes