Principal / Senior Software Engineer
Flagship Pioneering, Inc. · Cambridge, MA USA
Posted about 3 months ago · $108,000 - $209,000
or apply directly on Flagship Pioneering, Inc.'s site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 80 days Flagship Pioneering, Inc.'s roles stay open a median of 80 days
- Reposted
- No
- Salary listed
- Yes 89% of Flagship Pioneering, Inc.'s roles list one
- Ghost-job risk at Flagship Pioneering, Inc.
- high 97 stale, 1 reposted of 100 open
- Hiring momentum
- 144 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-10-22
Measured from postings appearing on and disappearing from Flagship Pioneering, Inc.'s own greenhouse board since 2026-08-03. Full hiring picture for Flagship Pioneering, Inc..
About this role
The Principal/Senior Software Engineer at Iris Labs will lead the design and development of customer-facing features across both front-end and back-end applications. The role involves collaborating with product managers, designers, and researchers to translate customer needs into impactful features, managing the full product development lifecycle, and improving application delivery practices. The engineer will also leverage AWS infrastructure to build scalable applications and uphold data security standards.
- benefits
- 2/5
- freshness
- 1/5
- career value
- 4/5
- role clarity
- 4/5
- pay transparency
- 5/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Flagship Pioneering, Inc. as an employer.
What you need
- 5+ years of experience in software development, with a strong focus on building applications
- Extensive experience with AWS services (including ECS, S3, Lambda, etc.) or a similar cloud services provider
- Proficient in Python
- Demonstrated ability to build scalable, efficient, and secure software applications
- Motivated and team oriented, with an ability to thrive in a multidisciplinary environment
- Excellent communication and collaboration abilities
Nice to have
- Experience with LLM development
- AWS Certifications, such as Solutions Architect Associate or Professional
- Able to build applications using the AWS CDK and Typescript
- Knowledge of security best practices for SaaS solutions
What you get
- Healthcare coverage
- Annual incentive program
- Retirement benefits
- Broad range of other benefits
Worth weighing
- No specific mention of the tech stack used beyond AWS and Python
- The role is in an early-stage company, which may involve uncertainties and rapid changes
- Salary range provided, but compensation depends on various factors
- Emphasis on a dynamic and innovative environment may require adaptability
Summarised from Flagship Pioneering, Inc.'s posting. Read the full original.
Listed by Flagship Pioneering, Inc. on their greenhouse job board, last confirmed open on 2026-10-22. PitchMeAI is not the employer.
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